Spencer Collins

CIK: 0001999165

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)9 (60.0%)

Position reduction

Option Exercises (M)2 (13.3%)

Derivative conversions

Awards (A)3 (20.0%)

Compensation grants

Other (G, F, J, C, D, …)1 (6.7%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

ARM

ARM HOLDINGS PLC /UK

Officer

Discretionary Trading P&L

Holdings

Transaction History (15 total)

ARM
ARM HOLDINGS PLC /UK
May 19, 2026
Sale(S)
Direct
40.9K shares at avg. $215.00$8.8M
ARM
ARM HOLDINGS PLC /UK
May 15, 2026
Exercise(M)
Direct
4.2K shares-
ARM
ARM HOLDINGS PLC /UK
May 15, 2026
Exercise(M)
Direct
4K shares-
ARM
ARM HOLDINGS PLC /UK
May 15, 2026
Award(A)
Direct
10.7K shares-
ARM
ARM HOLDINGS PLC /UK
May 15, 2026
Award(A)
Direct
48.4K shares-
ARM
ARM HOLDINGS PLC /UK
May 15, 2026
Tax Payment(F)
Direct
36.3K shares at avg. $209.16$7.6M
ARM
ARM HOLDINGS PLC /UK
May 15, 2026
Award(A)
Direct
10.1K shares-
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
836 shares at avg. $207.77$174K
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
4.9K shares at avg. $214.41$1.0M
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
1.8K shares at avg. $208.68$386K
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
5.4K shares at avg. $209.52$1.1M
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
9.8K shares at avg. $210.53$2.1M
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
10.7K shares at avg. $211.46$2.3M
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
11.2K shares at avg. $212.51$2.4M
ARM
ARM HOLDINGS PLC /UK
May 11, 2026
Sale(S)
Direct
7.4K shares at avg. $213.59$1.6M

		Type	Shares	Price		Ownership
May 19, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	40,941	$215.00	$8,802,315	Direct
May 15, 2026	ARM ARM HOLDINGS PLC /UK	Exercise(M)	4,184	-	$0	Direct
May 15, 2026	ARM ARM HOLDINGS PLC /UK	Exercise(M)	3,950	-	$0	Direct
May 15, 2026	ARM ARM HOLDINGS PLC /UK	Award(A)	10,668	-	$0	Direct
May 15, 2026	ARM ARM HOLDINGS PLC /UK	Award(A)	48,378	-	$0	Direct
May 15, 2026	ARM ARM HOLDINGS PLC /UK	Tax Payment(F)	36,310	$209.16	$7,594,600	Direct
May 15, 2026	ARM ARM HOLDINGS PLC /UK	Award(A)	10,071	-	$0	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	836	$207.77	$173,696	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	4,866	$214.41	$1,043,319	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	1,849	$208.68	$385,849	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	5,353	$209.52	$1,121,561	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	9,815	$210.53	$2,066,352	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	10,674	$211.46	$2,257,124	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	11,197	$212.51	$2,379,474	Direct
May 11, 2026	ARM ARM HOLDINGS PLC /UK	Sale(S)	7,371	$213.59	$1,574,372	Direct

1-15 of 15 transactions

About Collins Spencer

Collins Spencer (SEC CIK 0001999165) files insider reports with the SEC as Chief Legal Officer of ARM HOLDINGS PLC /UK (ARM).

Signal8 holds 4 ownership filings by Collins Spencer (1 Form 3, 3 Form 4), filed between Mar 18, 2026 and May 21, 2026. Those filings report 15 transactions, from May 11, 2026 to May 19, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Collins Spencer's filings is in CAMBRIDGE.

Recent filings by Collins Spencer

May 19, 2026: Open-market sale of ARM shares (Form 4, code S).
May 15, 2026: Option exercises of ARM shares (2 lines, Form 4, code M).
May 15, 2026: Grants or awards of ARM shares (2 lines, Form 4, code A).
May 15, 2026: Tax withholding of ARM shares (Form 4, code F).
May 15, 2026: Grant or award of ARM shares (Form 4, code A).

Other insiders filing for ARM HOLDINGS PLC /UK (ARM)

Child Jason, Chief Financial Officer
Abbey William, Chief Commercial Officer
Haas Rene A., Chief Executive Officer
Bartels Laura Kathleen, Chief Accounting Officer
Sine Jeffrey, Director
Eaton Charlotte Claire, Chief People Officer

How to read Form 4 transaction codes