By CapitalSnitch Research Desk · updated Oct 11, 2026 · data from SEC filings and official Congress disclosures
Insider activity at Arm Holdings plc has been all selling for a year now: about $72.2 million from seven sellers, and zero buyers in open-market trades.
Selling on its own is common and often pre-planned (10b5-1 plans, taxes, diversification), so it matters more when it is unusually heavy or broad.
Quarter by quarter: 3 quarters in a row of net selling by insiders. Insiders bought in 0 of the last 7 full quarters. Big money check: 955 institutions held ARM as of Q2 2026, and more funds bought than sold. Members of Congress reported 4 trades in ARM over the past two years (two members).
Are insiders buying or selling ARM stock?
In the last 12 months Arm Holdings plc insiders made open-market purchases worth about $0 and sales worth about $72.2 million. Data comes from SEC Form 4 filings, updated every 30 minutes on CapitalSnitch.
When was the last insider trade in ARM?
The most recent open-market insider trade in ARM was filed on 2026-09-23.
How many institutions own ARM?
955 investment managers reported holding ARM in SEC Form 13F filings for Q2 2026.
Has any member of Congress traded ARM?
Yes. Members of Congress reported 4 trades in ARM over the past two years. The full list is free on CapitalSnitch.
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Public-record data for research and education, not investment advice. Insider sales are often pre-planned (10b5-1).
Congress data: Data derived from public disclosures filed under the Ethics in Government Act and the STOCK Act, republished free for public transparency and news reporting. Disclosures may lag the trade by 45 days or more and show amounts only as ranges. This data may not be used for credit rating, loan underwriting, solicitation of money (political, charitable or other), direct-mail or commercial targeting (5 U.S.C. 13107).