April 2013

Preliminary Terms No. 35

Registration Statement No. 333-177923

Dated April 19, 2013

Filed pursuant to Rule 433

SUMMARY TERMS

Issuer:

Maturity date:

Underlying index:

Aggregate principal amount:

Payment at maturity:

$10 + leveraged upside payment

In no event will the payment at maturity exceed the maximum payment at maturity.

$10 × index performance factor

This amount will be less than or equal to the stated principal amount of $10 per PLUS.

Leveraged upside payment:

Index percent increase:

Initial index value:

Final index value:

Valuation date:

Leverage factor:

Index performance factor:

Maximum payment at maturity:

Stated principal amount:

Issue price:

Pricing date:

Original issue date:

CUSIP / ISIN:

Listing:

Agent:

Commissions and issue price:

Per PLUS                                

Total                                         

As an alternative to direct exposure to the underlying index that enhances returns for a certain range of positive performance of the underlying index.

To enhance returns and potentially outperform the underlying index in a moderately bullish scenario.

To potentially achieve similar levels of upside exposure to the underlying index as a direct investment, subject to the maximum payment at maturity, while using fewer dollars by taking advantage of the leverage factor.

Leveraged

Performance

Leverage factor:

300%

Hypothetical maximum payment at maturity:

$11.125 (111.25% of the stated principal amount) per PLUS (which represents the midpoint of the range of $11.05 to $11.20)*

Upside Scenario. If the final index value is greater than the initial index value, for each $10 principal amount PLUS investors will receive the $10 stated principal amount plus 300% of the appreciation of the underlying index over the term of the PLUS, subject to the maximum payment at maturity. Under the hypothetical terms of the PLUS, an investor will realize the hypothetical maximum payment at maturity at a final index value of 103.75% of the initial index value.

Par Scenario. If the final index value is equal to the initial index value, investors will receive the stated principal amount of $10 per PLUS.

Downside Scenario. If the final index value is less than the initial index value, investors will receive an amount that is less than the stated principal amount by an amount proportionate to the percentage decrease of the final index value from the initial index value.

For example, if the underlying index depreciates 50%, investors will lose 50% of their principal and receive only $5 per PLUS at maturity, or 50% of the stated principal amount.

PLUS do not pay interest or guarantee return of any principal and your investment in the PLUS may result in a loss. The terms of the PLUS differ from those of ordinary debt securities in that the PLUS do not pay interest or guarantee the payment of any principal amount at maturity. If the final index value is less than the initial index value, the payment at maturity will be an amount in cash that is less than the stated principal amount of each PLUS by an amount proportionate to the decrease in the value of the underlying index and may be zero.

The appreciation potential of the PLUS is limited by the maximum payment at maturity. The appreciation potential of PLUS is limited by the maximum payment at maturity of $11.05 to $11.20 (110.50% to 112.00% of the stated principal amount) per PLUS. The actual maximum payment at maturity will be determined on the pricing date. Although the leverage factor provides 300% exposure to any increase in the final index value as compared to the initial index value on the valuation date, because the maximum payment at maturity will be limited to 110.50% to 112.00% of the stated principal amount for the PLUS, any increase in the final index value by more than 3.50% (in the case where the maximum payment at maturity is 110.50% of the stated principal amount) to 4.00% (in the case where the maximum payment at maturity is 112.00% of the stated principal amount) will not further increase the return on the PLUS.

The PLUS are subject to the credit risk of JPMorgan Chase & Co., and any actual or anticipated changes to our credit ratings or credit spreads may adversely affect the market value of the PLUS. Investors are dependent on JPMorgan Chase & Co.’s ability to pay all amounts due on the PLUS, and therefore investors are subject to our credit risk and to 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 PLUS. If we were to default on our payment obligations, you may not receive any amounts owed to you under the PLUS and you could lose your entire investment.

Economic interests of the issuer, the calculation agent and other affiliates of the issuer may be different from those of investors. We and our affiliates play a variety of roles in connection with the issuance of the PLUS, including acting as calculation agent and hedging our obligations under the PLUS. In performing these duties, our economic interests and the economic interests of the calculation agent and other affiliates of ours are potentially adverse to your interests as an investor in the PLUS. The calculation agent will determine the initial index value and the final index value and will calculate the amount of payment you will receive at maturity, if any. Determinations made by the calculation agent, including with respect to the occurrence or non-occurrence of market disruption events, the selection of a successor to the underlying index or calculation of the final index value in the event of a discontinuance or material change in method of calculation of the underlying index, may affect the payment to you at maturity. In addition, we are currently one of the companies that make up the underlying index. We will not have any obligation to consider your interests as a holder of the PLUS in taking any corporate action that might affect the value of the underlying index or the PLUS. In addition, our business activities, including hedging and trading activities, could cause our economic interests to be adverse to yours and could adversely affect any payment on the PLUS and the value of the PLUS. It is possible that hedging or trading activities of ours or our affiliates could result in substantial returns for us or our affiliates while the value of the PLUS declines. Please refer to “Risk Factors — Risks Relating to the PLUS Generally” in the accompanying product supplement no. MS-1-I for additional information about these risks.

The inclusion in the original issue price of commissions and estimated cost of hedging is likely to adversely affect secondary market prices. Assuming no change in market conditions or any other relevant factors, the price, if any, at which JPMS is willing to purchase PLUS in secondary market transactions will likely be lower than the original issue price, because the original issue price will include, and secondary market prices are likely to exclude, commissions paid with respect to the PLUS, as well as the estimated cost of hedging the issuer’s obligations under the PLUS. In addition, any such prices may differ from values determined by pricing models used by JPMS, as a result of dealer discounts, mark-ups or other transaction costs. The PLUS are not designed to be short-term trading instruments. Accordingly, you should be able and willing to hold your PLUS to maturity.

Market price of the PLUS is influenced by many unpredictable factors. Several factors will influence the value of the PLUS in the secondary market and the price at which JPMS may be willing to purchase or sell the PLUS in the secondary market, including: the value, expected volatility and dividend yield of the underlying index, interest and yield rates, time remaining to maturity, geopolitical conditions and economic, financial, political and regulatory or judicial events and any actual or anticipated changes in our credit ratings or credit spreads.

Investing in the PLUS is not equivalent to investing in the underlying index. Investing in the PLUS is not equivalent to investing in the underlying index or its component stocks. Investors in the PLUS will not have voting rights or rights to receive dividends or other distributions or any other rights with respect to stocks that constitute the underlying index.

Adjustments to the underlying index could adversely affect the value of the PLUS. The underlying index publisher may discontinue or suspend calculation or publication of the underlying index at any time. In these circumstances, the calculation agent will have the sole discretion to substitute a successor index that is comparable to the discontinued underlying index and is not precluded from considering indices that are calculated and published by the calculation agent or any of its affiliates.

Hedging and trading activities by the calculation agent and its affiliates could potentially affect the value of the PLUS. The hedging or trading activities of the issuer’s affiliates and of any other hedging counterparty with respect to the PLUS on or prior to the pricing date and prior to maturity could adversely affect the value of the underlying index and, as a result, could decrease the amount an investor may receive on the PLUS at maturity. Any of these hedging or trading activities on or prior to the pricing date could potentially affect the initial index value and, therefore, could potentially increase the level that the final index value must reach before you receive a payment at maturity that exceeds the issue price of the PLUS. Additionally, these hedging or trading activities during the term of the PLUS, including on the valuation date, could adversely affect the final index value and, accordingly, the amount of cash an investor will receive at maturity. It is possible that such hedging or trading activities could result in substantial returns for us or our affiliates while the value of the PLUS declines.

Secondary trading may be limited. The PLUS will not be listed on a securities exchange. There may be little or no secondary market for the PLUS. Even if there is a secondary market, it may not provide enough liquidity to allow you to trade or sell the PLUS easily. JPMS may act as a market maker for the PLUS, but is not required to do so. Because we do not expect that other market makers will participate significantly in the secondary market for the PLUS, the price at which you may be able to trade your PLUS is likely to depend on the price, if any, at which JPMS is willing to buy the PLUS. If at any time JPMS or another agent does not act as a market maker, it is likely that there would be little or no secondary market for the PLUS.

The tax consequences of an investment in the PLUS are uncertain. There is no direct legal authority as to the proper U.S. federal income tax characterization of the PLUS, and we do not intend to request a ruling from the Internal Revenue Service (the “IRS”). The IRS might not accept, and a court might not uphold, the treatment of the PLUS described in “Additional Information About the PLUS—Additional Provisions—Tax considerations” in this document and in “Material U.S. Federal Income Tax Consequences” in the accompanying product supplement no. MS-1-I. If the IRS were successful in asserting an alternative treatment for the PLUS, the timing and character of any income or loss on the PLUS could differ materially and adversely from our description herein. In addition, in 2007 Treasury and the IRS released a notice requesting comments on the U.S. federal income tax treatment of “prepaid forward contracts” and similar instruments. The notice focuses in particular on whether to require investors in these instruments to accrue income over the term of their investment. It also asks for comments on a number of related topics, including the character of income or loss with respect to these instruments; the relevance of factors such as the nature of the underlying property to which the instruments are linked; the degree, if any, to which income (including any mandated accruals) realized by non-U.S. investors should be subject to withholding tax; and whether these instruments are or should be subject to the “constructive ownership” regime, which very generally can operate to recharacterize certain long-term capital gain as ordinary income and impose a notional interest charge. While the notice requests comments on appropriate transition rules and effective dates, any Treasury regulations or other guidance promulgated after consideration of these issues could materially and adversely affect the tax consequences of an investment in the PLUS, possibly with retroactive effect. You should review carefully the section entitled “Material U.S. Federal Income Tax Consequences” in the accompanying product supplement no. MS-1-I and consult your tax adviser regarding the U.S. federal income tax consequences of an investment in the PLUS, including possible alternative treatments and the issues presented by this notice.

Bloomberg Ticker Symbol:

Current Index Closing Value:

52 Weeks Ago:

52 Week High (on 4/11/2013):

52 Week Low (on 6/1/2012):

S&P 500^® Index

High

Low

Period  End

2008

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

2009

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

2010

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

2011

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

2012

First Quarter

Second Quarter

Third Quarter

Fourth Quarter

2013

First Quarter

Second Quarter (through April 18, 2013)

Additional provisions:

You should review carefully the section entitled “Material U.S. Federal Income Tax Consequences” in the accompanying product supplement no. MS-1-I. The following discussion, when read in combination with that section, constitutes the full opinion of our special tax counsel, Davis Polk & Wardwell LLP, regarding the material U.S. federal income tax consequences of owning and disposing of the PLUS.

Based on current market conditions, in the opinion of our special tax counsel, Davis Polk & Wardwell LLP, your PLUS should be treated as “open transactions” that are not debt instruments for U.S. federal income tax purposes. Assuming this treatment is respected, the gain or loss on your PLUS should be treated as long-term capital gain or loss if you hold your PLUS for more than a year, whether or not you are an initial purchaser of PLUS at the issue price. However, the IRS or a court may not respect this treatment of the PLUS, in which case the timing and character of any income or loss on the PLUS could be materially and adversely affected. In addition, in 2007 Treasury and the IRS released a notice requesting comments on the U.S. federal income tax treatment of “prepaid forward contracts” and similar instruments. The notice focuses in particular on whether to require investors in these instruments to accrue income over the term of their investment. It also asks for comments on a number of related topics, including the character of income or loss with respect to these instruments; the relevance of factors such as the nature of the underlying property to which the instruments are linked; the degree, if any, to which income (including any mandated accruals) realized by non-U.S. investors should be subject to withholding tax; and whether these instruments are or should be subject to the “constructive ownership” regime, which very generally can operate to recharacterize certain long-term capital gain as ordinary income and impose a notional interest charge. While the notice requests comments on appropriate transition rules and effective dates, any Treasury regulations or other guidance promulgated after consideration of these issues could materially and adversely affect the tax

The net proceeds we receive from the sale of the PLUS will be used for general corporate purposes and, in part, by us or by one or more of our affiliates in connection with hedging our obligations under the PLUS.

For further information on our use of proceeds and hedging, see “Use of Proceeds and Hedging” in the accompanying product supplement no. MS-1-I.

Subject to regulatory constraints, JPMS intends to use its reasonable efforts to offer to purchase the PLUS in the secondary market, but is not required to do so.

We or our affiliate may enter into swap agreements or related hedge transactions with one of our other affiliates or unaffiliated counterparties in connection with the sale of the PLUS and JPMS and/or an affiliate may earn additional income as a result of payments pursuant to the swap or related hedge transactions. See “Use of Proceeds and Hedging” beginning on page PS-31 of the accompanying product supplement no. MS-1-I.

JPMorgan Chase & Co. has filed a registration statement (including a prospectus) with the Securities and Exchange Commission, or SEC, for the offering to which these preliminary terms relate. Before you invest, you should read the prospectus in that registration statement and the other documents relating to this offering that JPMorgan Chase & Co. has filed with the SEC for more complete information about JPMorgan Chase & Co. and this offering. You may get these documents without cost by visiting EDGAR on the SEC website at www.sec.gov. Alternatively, JPMorgan Chase & Co., any agent or any dealer participating in this offering will arrange to send you the prospectus, the prospectus supplement, product supplement no. MS-1-I, underlying supplement no. 1-I and these preliminary terms if you so request by calling toll-free (800)-869-3326.

You may revoke your offer to purchase the PLUS at any time prior to the time at which we accept such offer by notifying the applicable agent. We reserve the right to change the terms of, or reject any offer to purchase the PLUS prior to their issuance. In the event of any changes to the terms of the PLUS, we will notify you and you will be asked to accept such changes in connection with your purchase. You may also choose to reject such changes in which case we may reject your offer to purchase.

You should read this document together with the prospectus dated November 14, 2011, as supplemented by the prospectus supplement dated November 14, 2011 relating to our Series E medium-term notes of which these PLUS are a part, and the more detailed information contained in product supplement no. MS-1-I dated November 22, 2011 and underlying supplement no. 1-I dated November 14, 2011.

This document, together with the documents listed below, contains the terms of the PLUS and supersedes all other prior or contemporaneous oral statements as well as any other written materials including preliminary or indicative pricing terms, correspondence, trade ideas, structures for implementation, sample structures, stand-alone fact sheets, brochures or other educational materials of ours. You should carefully consider, among other things, the matters set forth in “Risk Factors” in the accompanying product supplement no. MS-1-I, as the PLUS involve risks not associated with conventional debt securities. We urge you to consult your investment, legal, tax, accounting and other advisers before you invest in the PLUS.

You may access these documents on the SEC website at www.sec.gov as follows (or if such address has changed, by reviewing our filings for the relevant date on the SEC website):

— Product supplement no. MS-1-I dated November 22, 2011:

http://www.sec.gov/Archives/edgar/data/19617/000089109211007774/e46120_424b2.pdf

— Underlying supplement no. 1-I dated November 14, 2011:

http://www.sec.gov/Archives/edgar/data/19617/000089109211007615/e46154_424b2.pdf

— Prospectus supplement dated November 14, 2011:

http://www.sec.gov/Archives/edgar/data/19617/000089109211007578/e46180_424b2.pdf

— Prospectus dated November 14, 2011:

http://www.sec.gov/Archives/edgar/data/19617/000089109211007568/e46179_424b2.pdf

Our Central Index Key, or CIK, on the SEC website is 19617.

As used in this document, the “Company,” “we,” “us,” and “our” refer to JPMorgan Chase & Co.

“Performance Leveraged Upside SecuritiesSM” and “PLUSSM” are service marks of Morgan Stanley.