Sec Form 4 Filing - Feanny Tracy Ann @ LATTICE SEMICONDUCTOR CORP - 2023-11-03

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Feanny Tracy Ann 2. Issuer Name and Ticker or Trading Symbol LATTICE SEMICONDUCTOR CORP [ LSCC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) SVP, General Counsel (Last) (First) (Middle) 5555 NE MOORE COURT 3. Date of Earliest Transaction (MM/DD/YY) 11/03/2023 (Street) HILLSBORO, OR97124 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 11/03/2023 M 554 A 2,757 D Common Stock 11/03/2023 F( 2 ) 218 D $ 57.63 2,539 D Common Stock 11/03/2023 M 5,906 A 8,445 D Common Stock 11/03/2023 F( 2 ) 2,325 D $ 57.63 6,120 D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Unit (RSU) ( 3 ) 11/03/2023 M 554 ( 4 ) ( 5 ) Common Stock 554 $ 0 17,507 D Performance Restricted Stock Unit (PRSU) ( 3 ) 11/03/2023 M 5,906 11/03/2024( 6 ) ( 5 ) Common Stock 5,906 $ 0 0 ( 6 ) D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Feanny Tracy Ann 5555 NE MOORE COURT HILLSBORO, OR97124 SVP, General Counsel Signatures /s/ Tracy Feanny 11/07/2023 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted Stock Units (RSUs) - no purchase price for this transaction. ( 2 )These shares were retained by the Issuer in order to meet the tax withholding obligations of the Reporting Person in connection with the vesting of an installment of the restricted stock units. The amount retained by the Issuer was not in excess of the amount of the tax liability. ( 3 )Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuer's common stock without payment of specific consideration. ( 4 )Grants of Restricted Stock Units (RSUs) vest as follows: 25% of the RSUs will vest on the first anniversary of the date of grant, and an additional 6.25% of the RSUs shall vest at the end of each three month period thereafter. ( 5 )Not applicable. ( 6 )On November 3, 2023, the Compensation Committee of the Issuer's Board of Directors determined that 200% of the performance conditions, pertaining to the second tranche of shares subject to the Performance Restricted Stock Units (PRSUs) granted November 3, 2021 and scheduled to vest on November 3, 2023, had been achieved, resulting in the vesting and release of 5,906 shares. As the number of outstanding PRSUs following such second tranche vesting is not currently determinable, the share amount set forth in column 9 is zero as the number of shares subject to the third tranche of shares scheduled to vest on November 3, 2024 can range from zero shares (at 0%) to 5,908 shares (at 200%) depending on the level of achievement of the performance conditions.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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