MS-P Morgan Stanley

August 2024

Preliminary Pricing Supplement No. 3,378

Registration Statement Nos. 333-275587; 333-275587-01

Dated August 5, 2024

Filed pursuant to Rule 424(b)(2)

Morgan Stanley Finance LLC

Structured Investments

Opportunities in U.S. Equities

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Fully and Unconditionally Guaranteed by Morgan Stanley

Principal at Risk Securities

The securities offered are unsecured obligations of Morgan Stanley Finance LLC (“MSFL”) and are fully and unconditionally guaranteed by Morgan Stanley. The securities have the terms described in the accompanying product supplement, index supplement and prospectus, as supplemented or modified by this document. The securities do not guarantee the repayment of principal and do not provide for the regular payment of interest. Instead, the securities will pay a contingent quarterly coupon but only if the index closing value of each of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM is at or above 70% of its respective initial index value, which we refer to as the respective coupon threshold level, on the related observation date. However, if the index closing value of any underlying index is less than its coupon threshold level on any observation date, we will pay no interest for the related quarterly period. In addition, starting one year after the original issue date, the securities will be automatically redeemed if the index closing value of each underlying index is greater than or equal to its respective initial index value on any quarterly redemption determination date, for the early redemption payment equal to the sum of the stated principal amount plus the related contingent quarterly coupon. No further payments will be made on the securities once they have been redeemed. At maturity, if the securities have not previously been redeemed and the final index value of each underlying index is greater than or equal to 65% of its respective initial index value, which we refer to as the respective downside threshold level, the payment at maturity will be the stated principal amount and, if the final index value of each underlying index is also greater than or equal to its respective coupon threshold level, the related contingent quarterly coupon. If, however, the final index value of any underlying index is less than its respective downside threshold level, investors will be fully exposed to the decline in the worst performing underlying index on a 1-to-1 basis and will receive a payment at maturity that is less than 65% of the stated principal amount of the securities and could be zero. Accordingly, investors in the securities must be willing to accept the risk of losing their entire initial investment and also the risk of not receiving any contingent quarterly coupons throughout the 5-year term of the securities. Because all payments on the securities are based on the worst performing of the underlying indices, a decline beyond the respective coupon threshold level or respective downside threshold level, as applicable, of any underlying index will result in few or no contingent coupon payments or a significant loss of your investment, even if one or both of the other underlying indices have appreciated or have not declined as much. These long-dated securities are for investors who are willing to risk their principal based on the worst performing of three underlying indices and who seek an opportunity to earn interest at a potentially above-market rate in exchange for the risk of receiving no quarterly coupons over the entire 5-year term, with no possibility of being called out of the securities until after the initial 1-year non-call period. Investors will not participate in any appreciation of any underlying index. The securities are notes issued as part of MSFL’s Series A Global Medium-Term Notes program.

All payments are subject to our credit risk. If we default on our obligations, you could lose some or all of your investment. These securities are not secured obligations and you will not have any security interest in, or otherwise have any access to, any underlying reference asset or assets.

(1)Selected dealers and their financial advisors will collectively receive from the agent, Morgan Stanley & Co. LLC, a fixed sales commission of $ for each security they sell. See “Supplemental information regarding plan of distribution; conflicts of interest.” For additional information, see “Plan of Distribution (Conflicts of Interest)” in the accompanying product supplement for auto-callable securities.

(2)See “Use of proceeds and hedging” on page 27.

The securities involve risks not associated with an investment in ordinary debt securities. See “Risk Factors” beginning on page 11.

The Securities and Exchange Commission and state securities regulators have not approved or disapproved these securities, or determined if this document or the accompanying product supplement, index supplement and prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

The securities are not deposits or savings accounts and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency or instrumentality, nor are they obligations of, or guaranteed by, a bank.

You should read this document together with the related product supplement, index supplement and prospectus, each of which can be accessed via the hyperlinks below. When you read the accompanying product supplement and index supplement, please note that all references in such supplements to the prospectus dated November 16, 2023, or to any sections therein, should refer instead to the accompanying prospectus dated April 12, 2024 or to the corresponding sections of such prospectus, as applicable. Please also see “Additional Terms of the Securities” and “Additional Information About the Securities” at the end of this document.

As used in this document, “we,” “us” and “our” refer to Morgan Stanley or MSFL, or Morgan Stanley and MSFL collectively, as the context requires.

Product Supplement for Auto-Callable Securities dated November 16, 2023 ​ ​Index Supplement dated November 16, 2023

Prospectus dated April 12, 2024

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Observation Dates, Redemption Determination Dates, Coupon Payment Dates and Early Redemption Dates

* The securities are not subject to automatic early redemption until the fourth coupon payment date, which is August 14, 2025.

August 2024 Page 2

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Investment Summary

Contingent Income Auto-Callable Securities

Principal at Risk Securities

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM (the “securities”) do not provide for the regular payment of interest. Instead, the securities will pay a contingent quarterly coupon but only if the index closing value of each underlying index is at or above its respective coupon threshold level on the related observation date. However, if the index closing value of any underlying index is less than its respective coupon threshold level on any observation date, we will pay no interest for the related quarterly period. If the index closing value of any underlying index is less than its respective coupon threshold level on each observation date, you will not receive any contingent quarterly coupon for the entire 5-year term of the securities. We refer to these coupons as contingent, because there is no guarantee that you will receive a coupon payment on any coupon payment date. Even if each underlying index were to be at or above its respective coupon threshold level on some quarterly observation dates, they may not all close at or above their respective coupon threshold levels on other observation dates, in which case you will not receive some contingent quarterly coupon payments. In addition, if the securities have not been automatically called prior to maturity and the final index value of any underlying index is less than its respective downside threshold level, investors will be fully exposed to the decline in the worst performing underlying index on a 1-to-1 basis, and will receive a payment at maturity that is less than 65% of the stated principal amount of the securities and could be zero. Accordingly, investors in the securities must be willing to accept the risk of losing their entire initial investment and also the risk of not receiving any contingent quarterly coupons throughout the entire 5-year term of the securities.

August 2024 Page 3

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

The original issue price of each security is $1,000. This price includes costs associated with issuing, selling, structuring and hedging the securities, which are borne by you, and, consequently, the estimated value of the securities on the pricing date will be less than $1,000. We estimate that the value of each security on the pricing date will be approximately $941.80, or within $40.00 of that estimate. Our estimate of the value of the securities as determined on the pricing date will be set forth in the final pricing supplement.

What goes into the estimated value on the pricing date?

In valuing the securities on the pricing date, we take into account that the securities comprise both a debt component and a performance-based component linked to the underlying indices. The estimated value of the securities is determined using our own pricing and valuation models, market inputs and assumptions relating to the underlying indices, instruments based on the underlying indices, volatility and other factors including current and expected interest rates, as well as an interest rate related to our secondary market credit spread, which is the implied interest rate at which our conventional fixed rate debt trades in the secondary market.

What determines the economic terms of the securities?

In determining the economic terms of the securities, including the contingent quarterly coupon rate, the coupon threshold levels and the downside threshold levels, we use an internal funding rate, which is likely to be lower than our secondary market credit spreads and therefore advantageous to us. If the issuing, selling, structuring and hedging costs borne by you were lower or if the internal funding rate were higher, one or more of the economic terms of the securities would be more favorable to you.

What is the relationship between the estimated value on the pricing date and the secondary market price of the securities?

The price at which MS & Co. purchases the securities in the secondary market, absent changes in market conditions, including those related to the underlying indices, may vary from, and be lower than, the estimated value on the pricing date, because the secondary market price takes into account our secondary market credit spread as well as the bid-offer spread that MS & Co. would charge in a secondary market transaction of this type and other factors. However, because the costs associated with issuing, selling, structuring and hedging the securities are not fully deducted upon issuance, for a period of up to 6 months following the issue date, to the extent that MS & Co. may buy or sell the securities in the secondary market, absent changes in market conditions, including those related to the underlying indices, and to our secondary market credit spreads, it would do so based on values higher than the estimated value. We expect that those higher values will also be reflected in your brokerage account statements.

MS & Co. may, but is not obligated to, make a market in the securities, and, if it once chooses to make a market, may cease doing so at any time.

August 2024 Page 4

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Key Investment Rationale

The securities do not provide for the regular payment of interest. Instead, the securities will pay a contingent quarterly coupon but only if the index closing value of each underlying index is at or above its respective coupon threshold level on the related observation date. However, if the index closing value of any underlying index is less than its respective coupon threshold level on any observation date, we will pay no interest for the related quarterly period. The securities have been designed for investors who are willing to forgo market floating interest rates and accept the risk of receiving no coupon payments for the entire 5-year term of the securities in exchange for an opportunity to earn interest at a potentially above-market rate if each underlying index closes at or above its respective coupon threshold level on the quarterly observation dates until the securities are redeemed early or reach maturity.

The following scenarios are for illustrative purposes only to demonstrate how the coupon and the payment at maturity (if the securities have not previously been redeemed) are calculated, and do not attempt to demonstrate every situation that may occur. Accordingly, the securities may or may not be redeemed, the contingent quarterly coupon may be payable in none of, or some but not all of, the quarterly periods during the 5-year term of the securities and the payment at maturity may be less than 65% of the stated principal amount of the securities and may be zero.

August 2024 Page 5

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

How the Securities Work

The following diagrams illustrate the potential outcomes for the securities depending on (1) the index closing values on each quarterly observation date, (2) the index closing values on each quarterly redemption determination date (starting after one year) and (3) the final index values. Please see “Hypothetical Examples” beginning on page 8 for illustration of hypothetical payouts on the securities.

Diagram #1: Contingent Quarterly Coupons (Beginning on the First Coupon Payment Date until Early Redemption or Maturity)

Diagram #2: Automatic Early Redemption (Starting after One Year)

August 2024 Page 6

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Diagram #3: Payment at Maturity if No Automatic Early Redemption Occurs

For more information about the payout upon an early redemption or at maturity in different hypothetical scenarios, see “Hypothetical Examples” starting on page 8.

August 2024 Page 7

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Hypothetical Examples

The following hypothetical examples illustrate how to determine whether a contingent quarterly coupon is paid with respect to an observation date and how to calculate the payment at maturity, if any, if the securities have not been automatically redeemed early. The following examples are for illustrative purposes only. Whether you receive a contingent quarterly coupon will be determined by reference to the index closing value of each underlying index on each quarterly observation date, and the amount you will receive at maturity, if any, will be determined by reference to the final index value of each underlying index on the final observation date. The actual initial index value, coupon threshold level and downside threshold level for each underlying index will be determined on the pricing date. All payments on the securities, if any, are subject to our credit risk. The numbers in the hypothetical examples below may have been rounded for the ease of analysis. The below examples are based on the following terms:

*The actual contingent quarterly coupon will be an amount determined by the calculation agent based on the actual contingent quarterly coupon rate and the number of days in the applicable payment period, calculated on a 30/360 day-count basis. The hypothetical contingent quarterly coupon of $17.50 is used in these examples for ease of analysis.

August 2024 Page 8

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

How to determine whether a contingent quarterly coupon is payable with respect to an observation date:

On hypothetical observation date 1, each underlying index closes at or above its respective coupon threshold level. Therefore, a contingent quarterly coupon of $17.50 is paid on the relevant coupon payment date.

On each of hypothetical observation dates 2 and 3, at least one underlying index closes at or above its respective coupon threshold level, but one or both of the other underlying indices close below their respective coupon threshold levels. Therefore, no contingent quarterly coupon is paid on the relevant coupon payment date.

On hypothetical observation date 4, each underlying index closes below its respective coupon threshold level, and, accordingly, no contingent quarterly coupon is paid on the relevant coupon payment date.

If the index closing value of any underlying index is less than its respective coupon threshold level on each observation date, you will not receive any contingent quarterly coupons for the entire 5-year term of the securities.

August 2024 Page 9

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

How to calculate the payment at maturity (if the securities have not been automatically redeemed):

Starting after one year, if the index closing value of each underlying index is greater than or equal to its initial index value on any quarterly redemption determination date, the securities will be automatically redeemed for an early redemption payment equal to the stated principal amount for each security you hold plus the contingent quarterly coupon with respect to the related observation date.

The examples below illustrate how to calculate the payment at maturity if the securities have not been automatically redeemed prior to maturity.

In examples 1 and 2, the final index value(s) of one or two of the underlying indices are at or above the respective downside threshold level(s), but the final index value(s) of one or both of the other underlying indices are below the respective downside threshold level(s). Therefore, investors are exposed to the downside performance of the worst performing underlying index at maturity and receive at maturity an amount equal to the stated principal amount multiplied by the index performance factor of the worst performing underlying index. Moreover, investors do not receive any contingent quarterly coupon for the final quarterly period.

Similarly, in examples 3 and 4, the final index value of each underlying index is below its respective downside threshold level, and investors receive at maturity an amount equal to the stated principal amount multiplied by the index performance factor of the worst performing underlying index. In example 3, the RTY Index has declined 55% from its initial index value to its final index value, the NDX Index has declined 60% from its initial index value to its final index value and the INDU Index has declined 70% from its initial index value to its final index value. Therefore, the payment at maturity equals the stated principal amount multiplied by the index performance factor of the INDU Index, which is the worst performing underlying index in this example. In example 4, the RTY Index has declined 70% from its initial index value to its final index value, the NDX Index has declined 60% from its initial index value to its final index value and the INDU Index has declined 60% from its initial index value. Therefore, the payment at maturity equals the stated principal amount multiplied by the index performance factor of the RTY Index, which is the worst performing underlying index in this example. Moreover, investors do not receive the contingent quarterly coupon for the final quarterly period.

In example 5, the final index value of each underlying index is at or above its respective downside threshold level and coupon threshold level. Therefore, investors receive at maturity the stated principal amount of the securities plus the contingent quarterly coupon with respect to the final observation date. However, investors do not participate in any appreciation of the underlying indices.

If the final index value of ANY underlying index is below its respective downside threshold level, you will be exposed to the downside performance of the worst performing underlying index at maturity, and your payment at maturity will be less than $650 per security and could be zero.

August 2024 Page 10

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Risk Factors

This section describes the material risks relating to the securities. For further discussion of these and other risks, you should read the section entitled “Risk Factors” in the accompanying product supplement, index supplement and prospectus. We also urge you to consult with your investment, legal, tax, accounting and other advisers in connection with your investment in the securities.

Risks Relating to an Investment in the Securities

￭The securities do not guarantee the return of any principal. The terms of the securities differ from those of ordinary debt securities in that they do not guarantee the repayment of any principal. If the securities have not been automatically redeemed prior to maturity, and if the final index value of any underlying index is less than its downside threshold level of 65% of its initial index value, you will be exposed to the decline in the index closing value of the worst performing underlying index, as compared to its initial index value, on a 1-to-1 basis, and you will receive for each security that you hold at maturity an amount equal to the stated principal amount multiplied by the index performance factor of the worst performing underlying index. In this case, the payment at maturity will be less than 65% of the stated principal amount and could be zero.

￭The securities do not provide for the regular payment of interest. The terms of the securities differ from those of ordinary debt securities in that they do not provide for the regular payment of interest. Instead, the securities will pay a contingent quarterly coupon but only if the index closing value of each underlying index is at or above its respective coupon threshold level on the related observation date. If the index closing value of any underlying index is lower than its coupon threshold level on the relevant observation date for any interest period, we will pay no coupon on the applicable coupon payment date. It is possible that the index closing value of any underlying index will be less than its respective coupon threshold level for extended periods of time or even throughout the entire term of the securities so that you will receive few or no contingent quarterly coupons. If you do not earn sufficient contingent quarterly coupons over the term of the securities, the overall return on the securities may be less than the amount that would be paid on a conventional debt security of ours of comparable maturity.

￭The contingent quarterly coupon, if any, is based on the value of each underlying index on only the related quarterly observation date at the end of the related interest period. Whether the contingent quarterly coupon will be paid on any coupon payment date will be determined at the end of the relevant interest period based on the index closing value of each underlying index on the relevant quarterly observation date. As a result, you will not know whether you will receive the contingent quarterly coupon on any coupon payment date until near the end of the relevant interest period. Moreover, because the contingent quarterly coupon is based solely on the value of each underlying index on quarterly observation dates, if the index closing value of any underlying index on any observation date is below the coupon threshold level for such index, you will not receive the contingent quarterly coupon for the related interest period, even if the level of such underlying index was at or above its respective coupon threshold level on other days during that interest period, and even if the index closing value(s) of one or both of the other underlying indices are at or above their respective coupon threshold level(s).

￭Investors will not participate in any appreciation in any underlying index. Investors will not participate in any appreciation in any underlying index from the initial index value for such index, and the return on the securities will be limited to the contingent quarterly coupons, if any, that are paid with respect to each observation date on which the index closing value of each underlying index is greater than or equal to its respective coupon threshold level, if any.

￭The market price will be influenced by many unpredictable factors. Several factors, many of which are beyond our control, will influence the value of the securities in the secondary market and the price at which MS & Co. may be willing to purchase or sell the securities in the secondary market. We expect that generally the level of interest rates available in the market and the value of each underlying index on any day, including in relation to its respective coupon threshold level, downside threshold level and initial index value, will affect the value of the securities more than any other factors. Other factors that may influence the value of the securities include:

othe volatility (frequency and magnitude of changes in value) of the underlying indices,

owhether the index closing value of any underlying index has been below its respective coupon threshold level on any observation date,

ogeopolitical conditions and economic, financial, political, regulatory or judicial events that affect the component stocks of the underlying indices or securities markets generally and which may affect the value of each underlying index,

odividend rates on the securities underlying the underlying indices,

othe time remaining until the securities mature,

ointerest and yield rates in the market,

othe availability of comparable instruments,

othe composition of the underlying indices and changes in the constituent stocks of such indices, and

oany actual or anticipated changes in our credit ratings or credit spreads.

August 2024 Page 11

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Generally, the longer the time remaining to maturity, the more the market price of the securities will be affected by the other factors described above. Some or all of these factors will influence the price that you will receive if you sell your securities prior to maturity. In particular, if any underlying index has closed near or below its coupon threshold level, and especially if any underlying index has closed near or below its downside threshold level, the market value of the securities is expected to decrease substantially, and you may have to sell your securities at a substantial discount from the stated principal amount of $1,000 per security.

You cannot predict the future performance of any underlying index based on its historical performance. The value of any underlying index may decrease and be below the respective coupon threshold level for such index on each observation date so that you will receive no return on your investment, and any or all of the underlying indices may close below the respective downside threshold level(s) on the final observation date so that you will lose more than 35% or all of your initial investment in the securities. There can be no assurance that the index closing value of each underlying index will be at or above the respective coupon threshold level on any observation date so that you will receive a coupon payment on the securities for the applicable interest period, or that it will be at or above its respective downside threshold level on the final observation date so that you do not suffer a significant loss on your initial investment in the securities. See “Russell 2000® Index Overview,” “Nasdaq-100 Index® Overview” and “Dow Jones Industrial AverageSM Overview” below.

￭The securities are subject to our credit risk, and any actual or anticipated changes to our credit ratings or credit spreads may adversely affect the market value of the securities. You are dependent on our ability to pay all amounts due on the securities at maturity, upon early redemption or on any coupon payment date, and therefore you are subject to our credit risk. The securities are not guaranteed by any other entity. If we default on our obligations under the securities, your investment would be at risk and you could lose some or all of your investment. As a result, the market value of the securities prior to maturity will be affected by changes in the market’s view of our creditworthiness. Any actual or anticipated decline in our credit ratings or increase in the credit spreads charged by the market for taking our credit risk is likely to adversely affect the market value of the securities.

￭As a finance subsidiary, MSFL has no independent operations and will have no independent assets. As a finance subsidiary, MSFL has no independent operations beyond the issuance and administration of its securities and will have no independent assets available for distributions to holders of MSFL securities if they make claims in respect of such securities in a bankruptcy, resolution or similar proceeding. Accordingly, any recoveries by such holders will be limited to those available under the related guarantee by Morgan Stanley and that guarantee will rank pari passu with all other unsecured, unsubordinated obligations of Morgan Stanley. Holders will have recourse only to a single claim against Morgan Stanley and its assets under the guarantee. Holders of securities issued by MSFL should accordingly assume that in any such proceedings they would not have any priority over and should be treated pari passu with the claims of other unsecured, unsubordinated creditors of Morgan Stanley, including holders of Morgan Stanley-issued securities.

￭Not equivalent to investing in the underlying indices. Investing in the securities is not equivalent to investing in any underlying index or the component stocks of any underlying index. Investors in the securities will not participate in any positive performance of any underlying index, and will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to stocks that constitute any underlying index.

￭Reinvestment risk. The term of your investment in the securities may be shortened due to the automatic early redemption feature of the securities. If the securities are redeemed prior to maturity, you will receive no more contingent quarterly coupons and may be forced to invest in a lower interest rate environment and may not be able to reinvest at comparable terms or returns. However, under no circumstances will the securities be redeemed in the first year of the term of the securities.

￭The securities will not be listed on any securities exchange and secondary trading may be limited. Accordingly, you should be willing to hold your securities for the entire 5-year term of the securities. The securities will not be listed on any securities exchange. Therefore, there may be little or no secondary market for the securities. MS & Co. may, but is not obligated to, make a market in the securities and, if it once chooses to make a market, may cease doing so at any time. When it does make a market, it will generally do so for transactions of routine secondary market size at prices based on its estimate of the current value of the securities, taking into account its bid/offer spread, our credit spreads, market volatility, the notional size of the proposed sale, the cost of unwinding any related hedging positions, the time remaining to maturity and the likelihood that it will be able to resell the securities. Even if there is a secondary market, it may not provide enough liquidity to allow you to trade or sell the securities easily. Since other broker-dealers may not participate significantly in the secondary market for the securities, the price at which you may be able to trade your securities is likely to depend on the price, if any, at which MS & Co. is willing to transact. If, at any time, MS & Co. were to cease making a market in the securities, it is likely that there would be no secondary market for the securities. Accordingly, you should be willing to hold your securities to maturity.

￭The rate we are willing to pay for securities of this type, maturity and issuance size is likely to be lower than the rate implied by our secondary market credit spreads and advantageous to us. Both the lower rate and the inclusion of costs associated with issuing, selling, structuring and hedging the securities in the original issue price reduce the economic terms of the securities, cause the estimated value of the securities to be less than the original issue price and will

August 2024 Page 12

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

adversely affect secondary market prices. Assuming no change in market conditions or any other relevant factors, the prices, if any, at which dealers, including MS & Co., may be willing to purchase the securities in secondary market transactions will likely be significantly lower than the original issue price, because secondary market prices will exclude the issuing, selling, structuring and hedging-related costs that are included in the original issue price and borne by you and because the secondary market prices will reflect our secondary market credit spreads and the bid-offer spread that any dealer would charge in a secondary market transaction of this type as well as other factors.

The inclusion of the costs of issuing, selling, structuring and hedging the securities in the original issue price and the lower rate we are willing to pay as issuer make the economic terms of the securities less favorable to you than they otherwise would be.

However, because the costs associated with issuing, selling, structuring and hedging the securities are not fully deducted upon issuance, for a period of up to 6 months following the issue date, to the extent that MS & Co. may buy or sell the securities in the secondary market, absent changes in market conditions, including those related to the underlying indices, and to our secondary market credit spreads, it would do so based on values higher than the estimated value, and we expect that those higher values will also be reflected in your brokerage account statements.

￭The estimated value of the securities is determined by reference to our pricing and valuation models, which may differ from those of other dealers and is not a maximum or minimum secondary market price. These pricing and valuation models are proprietary and rely in part on subjective views of certain market inputs and certain assumptions about future events, which may prove to be incorrect. As a result, because there is no market-standard way to value these types of securities, our models may yield a higher estimated value of the securities than those generated by others, including other dealers in the market, if they attempted to value the securities. In addition, the estimated value on the pricing date does not represent a minimum or maximum price at which dealers, including MS & Co., would be willing to purchase your securities in the secondary market (if any exists) at any time. The value of your securities at any time after the date of this document will vary based on many factors that cannot be predicted with accuracy, including our creditworthiness and changes in market conditions. See also “The market price will be influenced by many unpredictable factors” above.

￭Hedging and trading activity by our affiliates could potentially affect the value of the securities. One or more of our affiliates and/or third-party dealers expect to carry out hedging activities related to the securities (and to other instruments linked to the underlying indices or their component stocks), including trading in the stocks that constitute the underlying indices as well as in other instruments related to the underlying indices. As a result, these entities may be unwinding or adjusting hedge positions during the term of the securities, and the hedging strategy may involve greater and more frequent dynamic adjustments to the hedge as the final observation date approaches. Some of our affiliates also trade the stocks that constitute the underlying indices and other financial instruments related to the underlying indices on a regular basis as part of their general broker-dealer and other businesses. Any of these hedging or trading activities on or prior to the pricing date could potentially increase the initial index value of an underlying index, and, therefore, could increase (i) the level at or above which such underlying index must close on any redemption determination date so that the securities are redeemed prior to maturity for the early redemption payment (depending also on the performance of the other underlying indices), (ii) the level at or above which such underlying index must close on each observation date in order for you to earn a contingent quarterly coupon (depending also on the performance of the other underlying indices) and (iii) the level at or above which such underlying index must close on the final observation date so that you are not exposed to the negative performance of the worst performing underlying index at maturity (depending also on the performance of the other underlying indices). Additionally, such hedging or trading activities during the term of the securities could affect the value of an underlying index on the redemption determination dates and the observation dates, and, accordingly, whether we redeem the securities prior to maturity, whether we pay a contingent quarterly coupon on the securities and the amount of cash you receive at maturity, if any (depending also on the performance of the other underlying indices).

￭The calculation agent, which is a subsidiary of Morgan Stanley and an affiliate of MSFL, will make determinations with respect to the securities. As calculation agent, MS & Co. will determine the initial index value, coupon threshold level and downside threshold level for each underlying index, whether you receive a contingent quarterly coupon on each coupon payment date and/or at maturity, whether the securities will be redeemed on any early redemption date and the payment at maturity, if any. Moreover, certain determinations made by MS & Co., in its capacity as calculation agent, may require it to exercise discretion and make subjective judgments, such as with respect to the occurrence or non-occurrence of market disruption events and the selection of a successor index or calculation of the index closing value in the event of a market disruption event or discontinuance of an underlying index. These potentially subjective determinations may adversely affect the payout to you at maturity, if any. For further information regarding these types of determinations, see "Description of Auto-Callable Securities—Postponement of Determination Dates," "—Alternate Exchange Calculation in Case of an Event of Default,” "—Discontinuance of Any Underlying Index; Alteration of Method of Calculation” and "—Calculation Agent and Calculations" in the accompanying product supplement. In addition, MS & Co. has determined the estimated value of the securities on the pricing date.

￭The U.S. federal income tax consequences of an investment in the securities are uncertain. There is no direct legal authority as to the proper treatment of the securities for U.S. federal income tax purposes, and, therefore, significant aspects of the tax treatment of the securities are uncertain.

August 2024 Page 13

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Please read the discussion under “Additional Information—Tax considerations” in this document concerning the U.S. federal income tax consequences of an investment in the securities. We intend to treat a security for U.S. federal income tax purposes as a single financial contract that provides for a coupon that will be treated as gross income to you at the time received or accrued, in accordance with your regular method of tax accounting. Under this treatment, the ordinary income treatment of the coupon payments, in conjunction with the capital loss treatment of any loss recognized upon the sale, exchange or settlement of the securities, could result in adverse tax consequences to holders of the securities because the deductibility of capital losses is subject to limitations. We do not plan to request a ruling from the Internal Revenue Service (the “IRS”) regarding the tax treatment of the securities, and the IRS or a court may not agree with the tax treatment described herein. If the IRS were successful in asserting an alternative treatment for the securities, the timing and character of income or loss on the securities might differ significantly from the tax treatment described herein. For example, under one possible treatment, the IRS could seek to recharacterize the securities as debt instruments. In that event, U.S. Holders (as defined below) would be required to accrue into income original issue discount on the securities every year at a “comparable yield” determined at the time of issuance (as adjusted based on the difference, if any, between the actual and the projected amount of any contingent payments on the securities) and recognize all income and gain in respect of the securities as ordinary income. The risk that financial instruments providing for buffers, triggers or similar downside protection features, such as the securities, would be recharacterized as debt is greater than the risk of recharacterization for comparable financial instruments that do not have such features. Moreover, future legislation, Treasury regulations or IRS guidance could adversely affect the U.S. federal tax consequences of an investment in the securities, possibly retroactively.

Non-U.S. Holders (as defined below) should note that we currently intend to withhold on any coupon paid to Non-U.S. Holders generally at a rate of 30%, or at a reduced rate specified by an applicable income tax treaty under an “other income” or similar provision, and will not be required to pay any additional amounts with respect to amounts withheld.

Both U.S. and Non-U.S. Holders should consult their tax advisers regarding the U.S. federal income tax consequences of an investment in the securities, including possible alternative treatments, as well as tax consequences arising under the laws of any state, local or non-U.S. taxing jurisdiction.

Risks Relating to the Underlying Indices

￭You are exposed to the price risk of each underlying index, with respect to both the contingent quarterly coupons, if any, and the payment at maturity, if any. Your return on the securities is not linked to a basket consisting of the underlying indices. Rather, it will be contingent upon the independent performance of each underlying index. Unlike an instrument with a return linked to a basket of underlying assets, in which risk is mitigated and diversified among all the components of the basket, you will be exposed to the risks related to each underlying index. Poor performance by any underlying index over the term of the securities will negatively affect your return and will not be offset or mitigated by any positive performance by the other underlying indices. To receive any contingent quarterly coupons, each underlying index must close at or above its respective coupon threshold level on the applicable observation date. In addition, if the securities have not been automatically redeemed early and any underlying index has declined to below its respective downside threshold level as of the final observation date, you will be fully exposed to the decline in the worst performing underlying index over the term of the securities on a 1-to-1 basis, even if one or both of the other underlying indices have appreciated or have not declined as much. Under this scenario, the value of any such payment will be less than 65% of the stated principal amount and could be zero. Accordingly, your investment is subject to the price risk of each underlying index.

￭Because the securities are linked to the performance of the worst performing underlying index, you are exposed to greater risks of receiving no contingent quarterly coupons and sustaining a significant loss on your investment than if the securities were linked to just one index. The risk that you will not receive any contingent quarterly coupons, or that you will suffer a significant loss on your investment, is greater if you invest in the securities as opposed to substantially similar securities that are linked to the performance of just one underlying index. With three underlying indices, it is more likely that any underlying index will close below its coupon threshold level on any observation date, and below its downside threshold level on the final observation date, than if the securities were linked to only one underlying index. Therefore, it is more likely that you will not receive any contingent quarterly coupons and that you will suffer a significant loss on your investment. In addition, because each underlying index must close above its initial index value on a quarterly redemption determination date in order for the securities to be called prior to maturity, the securities are less likely to be called on any early redemption date than if the securities were linked to just one underlying index.

￭The securities are linked to the Russell 2000® Index and are subject to risks associated with small-capitalization companies.  As the Russell 2000® Index is one of the underlying indices, and the Russell 2000® Index consists of stocks issued by companies with relatively small market capitalization, the securities are linked to the value of small-capitalization companies.  These companies often have greater stock price volatility, lower trading volume and less liquidity than large-capitalization companies and therefore the Russell 2000® Index may be more volatile than indices that consist of stocks issued by large-capitalization companies.  Stock prices of small-capitalization companies are also more vulnerable than those of large-

August 2024 Page 14

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

capitalization companies to adverse business and economic developments, and the stocks of small-capitalization companies may be thinly traded.  In addition, small capitalization companies are typically less well-established and less stable financially than large-capitalization companies and may depend on a small number of key personnel, making them more vulnerable to loss of personnel.  Such companies tend to have smaller revenues, less diverse product lines, smaller shares of their product or service markets, fewer financial resources and less competitive strengths than large-capitalization companies and are more susceptible to adverse developments related to their products.

￭Adjustments to the underlying indices could adversely affect the value of the securities. The publisher of each underlying index may add, delete or substitute the component stocks of such underlying index or make other methodological changes that could change the value of such underlying index. Any of these actions could adversely affect the value of the securities. The publisher of each underlying index may also discontinue or suspend calculation or publication of such underlying index at any time. In these circumstances, MS & Co., as the calculation agent, will have the sole discretion to substitute a successor index that is comparable to the discontinued index. MS & Co. could have an economic interest that is different than that of investors in the securities insofar as, for example, MS & Co. is permitted to consider indices that are calculated and published by MS & Co. or any of its affiliates. If MS & Co. determines that there is no appropriate successor index on any observation date, the determination of whether a contingent quarterly coupon will be payable on the securities on the applicable coupon payment date, whether the securities will be redeemed and/or the amount payable at maturity, if any, will be based on the value of such underlying index, based on the closing prices of the stocks constituting such underlying index at the time of such discontinuance, without rebalancing or substitution, computed by MS & Co. as calculation agent in accordance with the formula for calculating such underlying index last in effect prior to such discontinuance, as compared to the relevant initial index value, coupon threshold level or downside threshold level, as applicable (depending also on the performance of the other underlying indices).

August 2024 Page 15

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Russell 2000® Index Overview

The Russell 2000® Index is an index calculated, published and disseminated by FTSE International Limited (“FTSE Russell”), and measures the capitalization-weighted price performance of 2,000 U.S. small-capitalization stocks listed on eligible U.S. exchanges. The Russell 2000® Index is designed to track the performance of the small-capitalization segment of the U.S. equity market. The companies included in the Russell 2000® Index are the middle 2,000 (i.e., those ranked 1,001 through 3,000) of the companies that form the Russell 3000E™ Index. The Russell 2000® Index represents approximately 7% of the U.S. equity market. For additional information about the Russell 2000® Index, see the information set forth under “Russell Indices—Russell 2000® Index” in the accompanying index supplement.

Information as of market close on August 1, 2024:

The following graph sets forth the daily index closing values of the RTY Index for the period from January 1, 2019 through August 1, 2024. The related table sets forth the published high and low index closing values, as well as end-of-quarter index closing values, of the RTY Index for each quarter for the period from January 1, 2019 through August 1, 2024. The index closing value of the RTY Index on August 1, 2024 was 2,186.162. We obtained the information in the graph and table below from Bloomberg Financial Markets, without independent verification. The RTY Index has at times experienced periods of high volatility, and you should not take the historical values of the RTY Index as an indication of its future performance.

August 2024 Page 16

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

“Russell 2000® Index” and “Russell 3000ETM Index” are trademarks of FTSE Russell. For more information, see “Russell Indices” in the accompanying index supplement.

August 2024 Page 17

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Nasdaq-100 Index® Overview

The Nasdaq-100 Index®, which is calculated, maintained and published by Nasdaq, Inc., is a modified capitalization-weighted index of 100 of the largest and most actively traded equity securities of non-financial companies listed on The Nasdaq Stock Market LLC (the “Nasdaq”). The Nasdaq-100 Index® includes companies across a variety of major industry groups. At any moment in time, the value of the Nasdaq-100 Index® equals the aggregate value of the then-current Nasdaq-100 Index® share weights of each of the Nasdaq-100 Index® component securities, which are based on the total shares outstanding of each such Nasdaq-100 Index® component security, multiplied by each such security’s respective last sale price on the Nasdaq (which may be the official closing price published by the Nasdaq), and divided by a scaling factor, which becomes the basis for the reported Nasdaq-100 Index® value. For additional information about the Nasdaq-100 Index®, see the information set forth under “Nasdaq-100 Index®” in the accompanying index supplement.

Information as of market close on August 1, 2024:

The following graph sets forth the daily index closing values of the NDX Index for the period from January 1, 2019 through August 1, 2024. The related table sets forth the published high and low index closing values, as well as end-of-quarter index closing values, of the NDX Index for each quarter for the period from January 1, 2019 through August 1, 2024. The index closing value of the NDX Index on August 1, 2024 was 18,890.39. We obtained the information in the graph and table below from Bloomberg Financial Markets, without independent verification. The NDX Index has at times experienced periods of high volatility, and you should not take the historical values of the NDX Index as an indication of its future performance.

August 2024 Page 18

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

“Nasdaq®,” “Nasdaq-100®” and “Nasdaq-100 Index®” are trademarks of Nasdaq, Inc. For more information, see “Nasdaq-100 Index®” in the accompanying index supplement.

August 2024 Page 19

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Dow Jones Industrial AverageSM Overview

The Dow Jones Industrial AverageSM is a price-weighted index composed of 30 common stocks that is published by S&P® Dow Jones Indices LLC, the marketing name and a licensed trademark of CME Group Inc., as representative of the broad market of U.S. industry. For additional information about the Dow Jones Industrial AverageSM, see the information set forth under “Dow Jones Industrial AverageSM” in the accompanying index supplement.

Information as of market close on August 1, 2024:

The following graph sets forth the daily index closing values of the INDU Index for the period from January 1, 2019 through August 1, 2024. The related table sets forth the published high and low index closing values, as well as end-of-quarter index closing values, of the INDU Index for each quarter for the period from January 1, 2019 through August 1, 2024. The index closing value of the INDU Index on August 1, 2024 was 40,347.97. We obtained the information in the graph and table below from Bloomberg Financial Markets, without independent verification. The INDU Index has at times experienced periods of high volatility, and you should not take the historical values of the INDU Index as an indication of its future performance.

August 2024 Page 20

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

“Dow Jones,” “Dow Jones Industrial Average,” “Dow Jones Indexes” and “DJIA” are service marks of Dow Jones Trademark Holdings LLC. For more information, see “Dow Jones Industrial AverageSM” in the accompanying index supplement.

August 2024 Page 21

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Additional Terms of the Securities

Please read this information in conjunction with the terms on the front cover of this document.

August 2024 Page 22

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

August 2024 Page 23

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

Additional Information About the Securities

August 2024 Page 24

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

August 2024 Page 25

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

August 2024 Page 26

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

August 2024 Page 27

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

August 2024 Page 28

Morgan Stanley Finance LLC

Contingent Income Auto-Callable Securities due August 14, 2029, with 1-Year Initial Non-Call Period

All Payments on the Securities Based on the Worst Performing of the Russell 2000® Index, the Nasdaq-100 Index® and the Dow Jones Industrial AverageSM

Principal at Risk Securities

August 2024 Page 29