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ARM SEC Filing News — Arm Holdings plc

Latest SEC filings for Arm Holdings plc (ARM) explained in plain English: insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). Sourced directly from SEC EDGAR.

What you’re looking at: Each item below is parsed from an actual SEC filing. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.
Form 4 Insider Selling 2026-04-23

ARM insider Child Jason (Chief Financial Officer) sold 21,280 shares (~$3.83M)

Child Jason, listed as Chief Financial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 21,280 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Child Jason (Chief Financial Officer) Shares: 21,280 Est. Value: $3.83M
Form 144 Large Proposed Insider Sale 2026-04-22

ARM Form 144 filed for proposed insider sale by Child Jason (21,280 shares) ~$7.66M

Child Jason filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: Child Jason Shares: 21,280 Est. Value: $7.66M
Form 4 Insider Selling 2026-04-16

ARM insider Haas Rene A. (Director, Chief Executive Officer) sold 9,299 shares (~$1.50M)

Haas Rene A., listed as Director, Chief Executive Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 9,299 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Haas Rene A. (Director, Chief Executive Officer) Shares: 9,299 Est. Value: $1.50M
Form 144 Proposed Insider Sale 2026-04-14

ARM Form 144 filed for proposed insider sale by Haas Rene A. (9,299 shares) ~$2.99M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 9,299 Est. Value: $2.99M
Form 4 Insider Selling 2026-03-27

ARM insider Haas Rene A. (Director, Chief Executive Officer) sold 31,853 shares (~$5.13M)

Haas Rene A., listed as Director, Chief Executive Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 31,853 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Haas Rene A. (Director, Chief Executive Officer) Shares: 31,853 Est. Value: $5.13M
Form 4 Insider Selling 2026-03-27

ARM insider Child Jason (Chief Financial Officer) sold 21,280 shares (~$3.16M)

Child Jason, listed as Chief Financial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 21,280 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Child Jason (Chief Financial Officer) Shares: 21,280 Est. Value: $3.16M
Form 144 Proposed Insider Sale 2026-03-26

ARM Form 144 filed for proposed insider sale by Haas Rene A. (7,986 shares) ~$2.57M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 7,986 Est. Value: $2.57M
Form 144 Large Proposed Insider Sale 2026-03-25

ARM Form 144 filed for proposed insider sale by Haas Rene A. (23,867 shares) ~$7.69M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 23,867 Est. Value: $7.69M
Form 144 Large Proposed Insider Sale 2026-03-25

ARM Form 144 filed for proposed insider sale by Child Jason (21,280 shares) ~$6.31M

Child Jason filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4. The proposed dollar value is large enough to merit attention.

Filing: Form 144 (Proposed Sale Notice) Insider: Child Jason Shares: 21,280 Est. Value: $6.31M
Form 144 Proposed Insider Sale 2026-02-27

ARM Form 144 filed for proposed insider sale by Haas Rene A. (6,152 shares) ~$1.55M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 6,152 Est. Value: $1.55M
Form 144 Proposed Insider Sale 2026-02-18

ARM Form 144 filed for proposed insider sale by Child Jason (10,640 shares) ~$2.73M

Child Jason filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Child Jason Shares: 10,640 Est. Value: $2.73M
Form 144 Proposed Insider Sale 2026-01-30

ARM Form 144 filed for proposed insider sale by Haas Rene A. (6,152 shares) ~$1.31M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 6,152 Est. Value: $1.31M
Form 144 Proposed Insider Sale 2025-12-31

ARM Form 144 filed for proposed insider sale by Haas Rene A. (6,152 shares) ~$1.36M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 6,152 Est. Value: $1.36M
Form 144 Proposed Insider Sale 2025-11-28

ARM Form 144 filed for proposed insider sale by Haas Rene A. (6,152 shares) ~$1.65M

Haas Rene A. filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Haas Rene A. Shares: 6,152 Est. Value: $1.65M
Form 144 Proposed Insider Sale 2025-11-19

ARM Form 144 filed for proposed insider sale by Child Jason (10,640 shares) ~$2.93M

Child Jason filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Child Jason Shares: 10,640 Est. Value: $2.93M
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