What changed in this filing

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Item 5. Other Information

2026-04-23 compared with 2026-01-29 · 26 added, 30 removed, 28 unchanged (67% of the section changed)

1 unchanged sentence

Rule 10b5-1 and Non-Rule 10b5-1 Trading Arrangements

During the Company’s fiscal quarter ended December 28, 2025, except for the following arrangement, none of the Company’s directors or officers adopted , modified, or terminated a trading arrangement for the purchase or sale of the Company’s common stock that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) (a “Rule 10b5-1 Trading Arrangement”) or a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

• On October 29, 2025 , Patrick J.

Lord , the Executive Vice President and Chief Operating Officer of the Company, adopted a Rule 10b5-1 Trading Arrangement.

Lord’s Rule 10b5-1 Trading Arrangement provides for:

(i) the potential sale of up to 36,645 shares of the Company’s common stock;

(ii) the potential exercise of 10,130 stock options expiring March 1, 2029 and the associated sale of up to 10,130 shares of the Company’s common stock resulting from such exercise;

During the Company’s fiscal quarter ended March 29, 2026, except for the following arrangements, none of the Company’s directors or officers adopted or terminated a trading arrangement for the purchase or sale of the Company’s Common Stock that was intended

Lam Research Corporation 2026 Q3 10-Q 39

potential exercise of 28,140 stock options expiring March 1, 2030 and the associated sale of up to 28,140 shares of the Company’s common stock resulting from such exercise;

(iv) the potential exercise of 21,220 stock options expiring March 1, 2031 and the associated sale of up to 21,220 shares of the Company’s common stock resulting from such exercise;

(v) the potential sale of the net shares of the Company’s common stock resulting from the vesting of 17,244 service-based restricted stock units (net shares are net of tax withholding);

and (vi) subject to performance conditions, the potential sale of the net shares of the Company’s common stock resulting from the vesting of 63,345 market-based performance restricted stock units (representing the maximum number of shares that may be issued;

the final number of shares that may be earned is 0% to 150% of the target number of 42,230);

in each case pursuant to the terms of the Rule 10b5-1 Trading Arrangement.

Lord’s Rule 10b5-1 Trading Arrangement has a termination date of October 30, 2026 .

• On November 12, 2025 , Bethany J.

Mayer , a member of the Board of Directors of the Company, adopted a Rule 10b5-1 Trading Arrangement.

Mayer’s Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 615 shares of the Company’s common stock.

Mayer’s Rule 10b5-1 Trading Arrangement has a termination date of November 9, 2026 .

• On November 17, 2025 , Neil J.

Fernandes , the Senior Vice President, Global Customer Operations , of the Company, adopted a Rule 10b5-1 Trading Arrangement.

Fernandes’ Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 25,829 shares of the Company’s common stock pursuant to the terms of the Rule 10b5-1 Trading Arrangement.

Fernandes’ Rule 10b5-1 Trading Arrangement has a termination date of November 30, 2026 .

The Rule 10b5-1 Trading Arrangements o f Dr.

Fernandes contain pricing conditions that preclude or limit the sale of shares below predetermined minimum prices.

Each of the Rule 10b5-1 Trading Arrangements will terminate on the earlier of:

to satisfy the affirmative defense conditions of Rule 10b5-1(c) (a “Rule 10b5-1 Trading Arrangement”) or a non-Rule 10b5-1 trading arrangement (as defined in Item 408(c) of Regulation S-K).

• On February 6, 2026 , Eric K.

Brandt , a member of the Board of Directors of the Company, adopted a Rule 10b5-1 Trading Arrangement.

Brandt’s Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 109,000 shares of Common Stock pursuant to the terms of the Rule 10b5-1 Trading Arrangement.

Brandt’s Rule 10b5-1 Trading Arrangement has a termination date of October 30, 2026 .

• On February 17, 2026 , in connection with his retirement from his position as Executive Vice President and Chief Operating Officer of the Company, Patrick J.

Lord terminated a Rule 10b5-1 Trading Arrangement that was originally adopted on October 29, 2025 (the “Terminated Plan”).

The Terminated Plan had provided for:

(i) the potential sale of up to 36,645 shares of Common Stock;

(ii) the potential exercise of 59,490 stock options and the associated sale of up to 59,490 shares of Common Stock resulting from such exercise;

(iii) the potential sale of the net shares of Common Stock resulting from the vesting of 17,244 service-based restricted stock units (net shares are net of tax withholding);

and (iv) the potential sale of the net shares of Common Stock resulting from the vesting of 63,345 market-based performance restricted stock units, in each case pursuant to the terms of the Terminated Plan.

The Terminated Plan contained pricing conditions that precluded or limited the sale of shares below predetermined minimum prices.

• On February 24, 2026 , Timothy M.

Archer , President, Chief Executive Officer and a member of the Board of Directors of the Company, adopted a Rule 10b5-1 Trading Arrangement.

Archer’s Rule 10b5-1 Trading Arrangement provides for the potential exercise of up to 121,400 stock options expiring March 2, 2027 and the associated sale of up to 121,400 shares of Common Stock resulting from such exercise, in each case pursuant to the terms of the Rule 10b5-1 Trading Arrangement.

Archer’s Rule 10b5-1 Trading Arrangement has a termination date of November 30, 2026 .

• On March 11, 2026 , Abhijit Y.

Talwalkar , Chair of the Board of Directors of the Company, adopted a Rule 10b5-1 Trading Arrangement.

Talwalkar’s Rule 10b5-1 Trading Arrangement provides for the potential sale of up to 18,282 shares of Common Stock pursuant to the terms of the Rule 10b5-1 Trading Arrangement.

Talwalkar’s Rule 10b5-1 Trading Arrangement has a termination date of March 12, 2027 .

The Rule 10b5-1 Trading Arrangements of Messrs.

Talwalkar, Archer and Brandt contain pricing conditions that preclude or limit the exercise of stock options or the sale of shares, as applicable, below predetermined minimum prices.

Each of the Rule 10b5-1 Trading Arrangements (other than the Terminated Plan) will terminate on the earlier of:

(a) its respective termination date indicated above;

3 unchanged sentences

Exhibit Number Description

3.1 Restated Certificate of Incorporation of Lam Research Corporation, dated November 4, 2025 which is incorporated by reference to E xhibit 3.2 to the Registrant’s Current Report on Form 8-K filed on November 6, 2025 (SEC File No.

10.1 * Lam Research Corporation 2025 Stock Incentive Plan which is incorporated by reference to Exhibit 10.1 to the Registrant’s Current Report on Form 8-K filed on November 6, 2025 (SEC File No.

10.2 * Form of Restricted Stock Unit Agreement (Board of Directors) - 2025 Stock Incentive Plan

10.3 * Form of Restricted Stock Unit Agreement - 2025 Stock Incentive Plan

10.4 * Form of Market-based Performance Restricted Stock Unit Agreement - 2025 Stock Incentive Plan

31.1 Rule 13a-14(a)/15d-14(a) Certification (Principal Executive Officer)

14 unchanged sentences

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned thereunto duly authorized.

January 29, 2026 LAM RESEARCH CORPORATION

April 23, 2026 LAM RESEARCH CORPORATION

/s/ Douglas R.

3 unchanged sentences

Compared sentence by sentence after normalising whitespace, quotation marks, case and digits, so re-formatting and restated figures do not read as changed language. Wording changes appear as one removal and one addition. The current filing and the prior one are authoritative.

What changed 10-Q

Item 5. Other Information