person · Reporting owner

Grisenthwaite Richard Roy

Disclosed activity across 1 company

Tapewire entity: 46026
SEC CIK: 0002112445

Reported relationships

Latest disclosed role at each company.

Company	Last reported as	Report date	Published
ARM HOLDINGS PLC /UKARM · Entity 2828	Chief Architect	May 15, 2026	May 19, 2026

Disclosed balances

About these balances

Latest available filing per company, not a reconstructed current portfolio. Matching sequences show the last reported balance with all source rows expandable; grouping alone does not establish account ownership. Do not add unresolved positions together. Filings may omit unchanged positions, and amendments may correct only part of an older disclosure. Jointly reported shares are not necessarily this owner's personal holdings.

ARM HOLDINGS PLC /UK

Report date May 15, 2026 · Filed May 19, 2026

Security / award	Ownership account	Disclosed shares / units	Disclosure context
Ordinary SharesSEC Table I · non-derivative	Direct	0	Last balance in matching sequence After 2026-05-18 transaction · row 9 Source-order balances reconcile. Account continuity and personal attribution are not independently verified. 9 source rows Row 1 · 2026-05-15 · Grant · Acquired 5,217 · Balance 5,543 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F2: Represents performance-based restricted stock units granted on May 1, 2025, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee (the "Remuneration Committee") of the Board of Directors of the Company. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 2 · 2026-05-15 · Exercise / conversion · Acquired 2,046 · Balance 7,589 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F4: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 3 · 2026-05-15 · Exercise / conversion · Acquired 14,595 · Balance 22,184 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F4: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 4 · 2026-05-15 · Grant · Acquired 4,158 · Balance 26,342 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F5: Represents performance-based RSUs granted on May 13, 2024, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 5 · 2026-05-15 · Exercise / conversion · Acquired 1,631 · Balance 27,973 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F6: This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 6 · 2026-05-15 · Grant · Acquired 13,315 · Balance 41,288 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F7: Represents performance-based RSUs granted on May 23, 2023, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 7 · 2026-05-15 · Exercise / conversion · Acquired 4,352 · Balance 45,640 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F8: This RSU award was granted on May 23, 2023 and vested on May 15, 2026. F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Row 8 · 2026-05-15 · Tax withholding · Disposed 21,301 · Balance 24,339 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F9: Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs. Row 9 · 2026-05-18 · Sale · Disposed 24,339 · Balance 0 F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F10: Represents weighted average sales price. The shares were sold at prices ranging from $209.03 to $209.66. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	106,282	Reported balance After 2026-05-15 transaction · row 10 Instrument identity requires review; Table II rows are not merged. 1 source row Row 10 · 2026-05-15 · Grant · Acquired 6,648 · Balance 106,282 F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F11: This RSU award was granted effective May 15, 2026. 30% will vest on each of May 15, 2027, and May 15, 2028, and the remaining 40% will vest on May 15, 2029, subject to continued service to the Company.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	141,067	Reported balance After 2026-05-15 transaction · row 11 Instrument identity requires review; Table II rows are not merged. 1 source row Row 11 · 2026-05-15 · Grant · Acquired 34,785 · Balance 141,067 F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F12: This RSU award was granted effective May 15, 2026. 50% will vest on each of May 15, 2028 and May 15, 2029, subject to continued service to the Company.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	139,021	Reported balance After 2026-05-15 transaction · row 12 Instrument identity requires review; Table II rows are not merged. 1 source row Row 12 · 2026-05-15 · Exercise / conversion · Disposed 2,046 · Balance 139,021 F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F4: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	124,426	Reported balance After 2026-05-15 transaction · row 13 Instrument identity requires review; Table II rows are not merged. 1 source row Row 13 · 2026-05-15 · Exercise / conversion · Disposed 14,595 · Balance 124,426 F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F4: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	122,795	Reported balance After 2026-05-15 transaction · row 14 Instrument identity requires review; Table II rows are not merged. 1 source row Row 14 · 2026-05-15 · Exercise / conversion · Disposed 1,631 · Balance 122,795 F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F6: This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company.
Restricted Stock UnitsSEC Table II · derivative / convertible security	Direct	118,443	Reported balance After 2026-05-15 transaction · row 15 Instrument identity requires review; Table II rows are not merged. 1 source row Row 15 · 2026-05-15 · Exercise / conversion · Disposed 4,352 · Balance 118,443 F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F8: This RSU award was granted on May 23, 2023 and vested on May 15, 2026.

Filing footnotes · ownership attribution and instrument terms

F1: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share.

F2: Represents performance-based restricted stock units granted on May 1, 2025, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee (the "Remuneration Committee") of the Board of Directors of the Company.

F3: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS.

F4: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company.

F5: Represents performance-based RSUs granted on May 13, 2024, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee.

F6: This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company.

F7: Represents performance-based RSUs granted on May 23, 2023, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee.

F8: This RSU award was granted on May 23, 2023 and vested on May 15, 2026.

F9: Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs.

F10: Represents weighted average sales price. The shares were sold at prices ranging from $209.03 to $209.66. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price

F11: This RSU award was granted effective May 15, 2026. 30% will vest on each of May 15, 2027, and May 15, 2028, and the remaining 40% will vest on May 15, 2029, subject to continued service to the Company.

F12: This RSU award was granted effective May 15, 2026. 50% will vest on each of May 15, 2028 and May 15, 2029, subject to continued service to the Company.

Transaction history

JSON API

Purchases/sales include open-market and private transactions. Plan disclosure applies to the filing; individual rows may differ. “Not disclosed” is not “unplanned.”

The cutoff filters transaction history only. Company summaries and owner relationships show the latest available disclosures. Parser corrections can improve historical records.

Transaction date	Company	Activity / security	Shares / units	Reported price	Reported value	Details
May 18, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	SaleOrdinary Shares	24,339	$209.15	$5,090,501.85	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 9 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 0 F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F10 · price: Represents weighted average sales price. The shares were sold at prices ranging from $209.03 to $209.66. The reporting person will provide upon request, to the SEC, the Issuer or security holder of the Issuer, full information regarding the number of shares sold at each separate price Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionRestricted Stock Units · Derivative	4,352	$0.00	$0.00	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · derivative · entry 15 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 118,443 Underlying: Ordinary Shares · 4,352 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F8 · derivative.exercise_date: This RSU award was granted on May 23, 2023 and vested on May 15, 2026. F8 · derivative.expiration_date: This RSU award was granted on May 23, 2023 and vested on May 15, 2026. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionRestricted Stock Units · Derivative	1,631	$0.00	$0.00	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · derivative · entry 14 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 122,795 Underlying: Ordinary Shares · 1,631 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F6 · derivative.exercise_date: This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company. F6 · derivative.expiration_date: This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionRestricted Stock Units · Derivative	14,595	$0.00	$0.00	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · derivative · entry 13 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 124,426 Underlying: Ordinary Shares · 14,595 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F4 · derivative.exercise_date: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. F4 · derivative.expiration_date: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionRestricted Stock Units · Derivative	2,046	$0.00	$0.00	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · derivative · entry 12 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 139,021 Underlying: Ordinary Shares · 2,046 shares Expires not disclosed Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F4 · derivative.exercise_date: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. F4 · derivative.expiration_date: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	GrantRestricted Stock Units · Derivative	34,785	$0.00	$0.00	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · derivative · entry 11 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 141,067 Underlying: Ordinary Shares · 34,785 shares Expires not disclosed F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F12 · derivative.exercise_date: This RSU award was granted effective May 15, 2026. 50% will vest on each of May 15, 2028 and May 15, 2029, subject to continued service to the Company. F12 · derivative.expiration_date: This RSU award was granted effective May 15, 2026. 50% will vest on each of May 15, 2028 and May 15, 2029, subject to continued service to the Company. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	GrantRestricted Stock Units · Derivative	6,648	$0.00	$0.00	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · derivative · entry 10 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 106,282 Underlying: Ordinary Shares · 6,648 shares Expires not disclosed F3 · derivative.exercise_price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. F11 · derivative.exercise_date: This RSU award was granted effective May 15, 2026. 30% will vest on each of May 15, 2027, and May 15, 2028, and the remaining 40% will vest on May 15, 2029, subject to continued service to the Company. F11 · derivative.expiration_date: This RSU award was granted effective May 15, 2026. 30% will vest on each of May 15, 2027, and May 15, 2028, and the remaining 40% will vest on May 15, 2029, subject to continued service to the Company. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Tax withholdingOrdinary Shares	21,301	$209.16	$4,455,317.16	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 8 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 24,339 F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F9 · kind: Ordinary Shares withheld to satisfy tax withholding requirements on vesting of RSUs. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionOrdinary Shares	4,352	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 7 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 45,640 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F8 · shares: This RSU award was granted on May 23, 2023 and vested on May 15, 2026. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	GrantOrdinary Shares	13,315	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 6 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 41,288 F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F7 · shares: Represents performance-based RSUs granted on May 23, 2023, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionOrdinary Shares	1,631	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 5 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 27,973 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F6 · shares: This RSU award was granted on May 13, 2024, 30% of which vested on each of May 15, 2025 and May 15, 2026. The remaining 40% will vest on May 15, 2027, subject to continued service to the Company. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	GrantOrdinary Shares	4,158	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 4 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 26,342 F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F5 · shares: Represents performance-based RSUs granted on May 13, 2024, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionOrdinary Shares	14,595	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 3 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 22,184 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F4 · shares: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	Exercise / conversionOrdinary Shares	2,046	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 2 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 7,589 Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event. F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F4 · shares: This RSU award was granted on May 1, 2025. 30% of the award vested on May 15, 2026. 30% of the award will vest on May 15, 2027, and the remaining 40% will vest on May 15, 2028, subject to continued service to the Company. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document
May 15, 2026 Filed May 19, 2026 21:20 UTC	ARM HOLDINGS PLC /UK ARM · Entity 2828	GrantOrdinary Shares	5,217	Not disclosed	Not disclosed	Disclosure SEC source: 0001973239-26-000076 · wk-form4_1779225623.xml · nonDerivative · entry 1 Grisenthwaite Richard Roy · CIK 0002112445 · Chief Architect 10b5-1 filing: No plan indicated Ownership: Direct Disclosed balance after: 5,543 F1 · security: Ordinary shares, nominal value 0.001 GBP per share ("Ordinary Shares"), are held in the form of American Depositary Shares ("ADSs"). Each ADS represents 1 Ordinary Share. F2 · shares: Represents performance-based restricted stock units granted on May 1, 2025, which vested on May 15, 2026, following certification of the satisfaction of certain performance conditions by the Remuneration Committee (the "Remuneration Committee") of the Board of Directors of the Company. F3 · price: Each restricted stock unit ("RSU") represents the right to receive, following vesting, 1 Ordinary Share held in the form of an ADS. Read SEC document

Value uses the disclosed total when available, otherwise shares × reported transaction price. It is not an estimate of exercise cash cost or investment performance.