$ARM

$226.66 +$3.31 (1.48%) Live

$ARM Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 1.06B shares outstanding

Who owns ARM?

By type of holder

Institutions 42.6% Insiders 0.0% Everyone else 57.4%

Concentration Top 10 holders own 27.9%

Exor N.V. 17.5% · BlackRock, Inc. 2.4%

Institutional ownership

42.6%

+1.1 pts vs last qtr

Institutional holders

1,125

+53 vs last qtr

Net shares bought

+11.9M

by institutions in Q2 2026

New / sold out

148 / 95

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

FMR LLC +4.2M
Norges Bank NEW +3.9M

Biggest sellers in Q2 2026

Cantillon Capital Management LLC −2.6M
Massachusetts Financial Services Co /ma/ −2.6M

Who is planning to sell?

Notices of proposed sale, last 12 months

$53.7M

17 notices from 4 people

Shares covered

279.7K

0.03% of the company

Arranged in advance

55%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Child Jason Officer 10b5-1 $20.2M
Collins Spencer Officer $19.8M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2022–FY2026

+4.2%

+1.03% a year

Each share's claim on the business

−4.0%

shrank without buying or selling a share

Spent on buybacks vs paid in stock

— vs $3.01B

over 5 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years47% 3–5 years44% 1–3 years5% Under 1 year4%

Quarterly turnover

6.8%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ARM on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
EN Exor N.V.	185.9M	17.47%	+3.4M (+1.9%)	2023	92.6%
Shares held by quarter Peak holding185.9M (Q2'26) Change over 8 quarters+21.4M Share of the company17.470% Exor N.V.'s full portfolio →
B BlackRock, Inc.	25.6M	2.41%	−303.7K (−1.2%)	≤2021	0.1%
Shares held by quarter Peak holding26.4M (Q4'24) Change over 8 quarters−681.0K Share of the company2.410% BlackRock, Inc.'s full portfolio →

Exor N.V.

185.9M

% of company

17.47%

Change vs last qtr

+3.4M (+1.9%)

Held since

2023

BlackRock, Inc.

25.6M

% of company

2.41%

Change vs last qtr

−303.7K (−1.2%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding ARM Holdings PLC, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ARM on Form N-PORT; together they hold 10.2% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$1.19B	9.0M	0.84%	0.05%	June 30, 2026
V5 Vanguard 500 Index Fund Vanguard Index Funds	$973M	7.3M	0.69%	0.06%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$1.19B

% of company

0.84%

% of the fund

0.05%

As of

June 30, 2026

Vanguard 500 Index Fund

Vanguard Index Funds

Position value

$973M

% of company

0.69%

% of the fund

0.06%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding ARM Holdings PLC and how much of the fund the position is.

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