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Arm Holdings PLC (ARM)

Arm Holdings PLC (ARM) Insider Trading

Directors, officers and holders of more than 10% of ARM report their trades in its stock on SEC Form 4, within two business days. Each row below is one Form 4 transaction line. The one-letter code says what kind of transaction it was: only P (purchase) and S (sale) are open-market or private trades; awards, option exercises, tax withholding and gifts carry other codes.

Recent Form 4 transactions

The 50 most recent of 126 transactions on file: 0 with code P, 17 with code S and 33 with other codes.

DateInsiderCodeShares
Sep 21, 2026Child JasonS Sale10,400
Sep 14, 2026Abbey WilliamA Award17,288
Sep 9, 2026Haas Rene A.A Award425,000
Aug 31, 2026Haas Rene A.A Award64
Aug 27, 2026Child JasonS Sale10,400
Aug 17, 2026Bartels Laura KathleenF Tax Payment856
Aug 17, 2026Bartels Laura KathleenM Exercise819
Aug 17, 2026Bartels Laura KathleenM Exercise862
Aug 17, 2026Bartels Laura KathleenM Exercise862
Aug 17, 2026Bartels Laura KathleenM Exercise819
Aug 7, 2026Sine JeffreyG Gift9,572
Jun 2, 2026Bartels Laura KathleenS Sale11,306
Jun 1, 2026Abbey WilliamS Sale2,644
Jun 1, 2026Abbey WilliamS Sale3,922
May 28, 2026Abbey WilliamS Sale4,200
May 22, 2026Abbey WilliamS Sale2,300
May 21, 2026Eaton Charlotte ClaireS Sale5,000
May 21, 2026Eaton Charlotte ClaireS Sale4,000
May 21, 2026Abbey WilliamS Sale4,655
May 21, 2026Eaton Charlotte ClaireS Sale2,805
May 20, 2026Abbey WilliamS Sale5,069
May 20, 2026Child JasonS Sale31,920
May 20, 2026Eaton Charlotte ClaireS Sale3,100
May 19, 2026Abbey WilliamS Sale10,887
May 19, 2026Collins SpencerS Sale40,941
May 18, 2026Grisenthwaite Richard RoyS Sale24,339
May 15, 2026SOHN YOUNGM Exercise2,141
May 15, 2026Haas Rene A.A Award51,952
May 15, 2026Sine JeffreyM Exercise2,141
May 15, 2026Child JasonA Award11,849
May 15, 2026Eaton Charlotte ClaireF Tax Payment3,672
May 15, 2026Child JasonA Award11,909
May 15, 2026Eaton Charlotte ClaireM Exercise2,200
May 15, 2026Collins SpencerM Exercise3,950
May 15, 2026Bartels Laura KathleenF Tax Payment3,383
May 15, 2026Child JasonF Tax Payment37,950
May 15, 2026JACOBS PAUL EM Exercise2,141
May 15, 2026Bartels Laura KathleenM Exercise2,308
May 15, 2026Grisenthwaite Richard RoyM Exercise1,631
May 15, 2026Grisenthwaite Richard RoyA Award13,315
May 15, 2026Grisenthwaite Richard RoyM Exercise2,046
May 15, 2026Bartels Laura KathleenM Exercise3,588
May 15, 2026Bartels Laura KathleenM Exercise862
May 15, 2026Eaton Charlotte ClaireA Award5,612
May 15, 2026Collins SpencerA Award10,668
May 15, 2026Collins SpencerM Exercise4,184
May 15, 2026Grisenthwaite Richard RoyM Exercise14,595
May 15, 2026Collins SpencerA Award10,071
May 15, 2026Collins SpencerA Award48,378
May 15, 2026Haas Rene A.F Tax Payment143,316

The full Form 4 history is on the ARM company page (Insider Trades card, View all).

Questions about this data

Which insider transactions are open-market trades?

Code P (open market or private purchase) and code S (open market or private sale). Code F is shares withheld to pay tax on vesting stock, A is an award from the company, M and X are option exercises and G is a gift. None of those is the insider choosing to buy or sell in the market.

How quickly are insider trades reported?

A Form 4 is due before the end of the second business day after the trade. The date shown is the transaction date from the form.

Who has to file Form 4?

Officers, directors and beneficial owners of more than 10% of a class of the company’s registered equity, under Section 16 of the Securities Exchange Act.

Look up any code in the Form 4 transaction code reference, or read Form 4 codes explained.