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144 ·Filed Sep 21, 2026

ARM

ARM HOLDINGS PLC /UK
NEUTRAL
Impact 3/10
Horizondays Processed1mo ago SEC0001959173-26-007048
Form 144, notice of proposed sale of securities
Actionable Insight • Neutral

This is a routine Form 144 for equity compensation shares by the CFO. The sale amount is small relative to the company's market cap and the insider's likely total holdings. No change in fundamental outlook is signaled. Monitor the Form 4 filing after the sale to confirm execution and remaining holdings.

DirectionNeutral
Confidencehigh
Horizondays
Latest settled: T+20d
ARM ▼ -29.37% at T+20d
NEUTRAL call -29.37% · α vs SPY -28.47% · entry $322.90 → $228.05
Next anchor: T+60d in 7w
Latest observation: T+24 -19.19% FF3 residual α
Entry = T+0 close
Sep 21, 2026
via day close
T+1d
+3.19%
call +3.19% · α +3.21%
$333.20
settled 5w ago
T+5d
-12.25%
call -12.25% · α -11.23%
$283.33
settled 4w ago
T+20d
-29.37%
call -29.37% · α -28.47%
$228.05
settled 9d ago
T+60d
Pending
in 7w

Price Chart

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Executive Summary

CFO Jason Child filed a Form 144 notice of intent to sell 10,400 American Depositary Shares of Arm Holdings, with an approximate market value of $3.12 million based on the filing date. The shares were acquired through restricted stock vesting in 2024 and 2025, and the sale is planned through Fidelity Brokerage Services. This is a routine insider sale of equity compensation shares, not a secondary offering or a change in executive outlook.

Key Facts

  • Insider: Jason Child, CFO of Arm Holdings
  • Shares to be sold: 10,400 American Depositary Shares
  • Estimated value: $3,120,000 (based on filing date price of ~$300/share)
  • Shares acquired via restricted stock vesting on 05/15/2024 and 05/15/2025
  • Broker: Fidelity Brokerage Services LLC
  • Filing date: 09/21/2026
  • Sale intended on NASDAQ

Financial Impact

Sale of 10,400 ADS valued at approximately $3.12 million, less than 0.01% of Arm's market cap

dilution

Risk Factors

  • Insider selling ahead of a potential negative catalyst cannot be ruled out, but the small size and equity-compensation source make this unlikely
  • If the CFO accelerates selling beyond this notice, it could signal a change in sentiment

Investment Themes

Documents Analyzed

This report is based on 3 SEC documents filed with EDGAR.

DocumentAccession Number
144 Filing (Primary)0001959173-26-007048
Document: 0001959173-26-007048-index.html0001959173-26-007048
Document: 0001959173-26-007048.txt0001959173-26-007048
14 reports for ARM
Performance horizon

Track record builds as more directional reports settle.

Filters
Rows
Reports for ARM, sortable and filterable
TypeNow
Oct 23, 2026
4d ago
Institutional Cluster
BEARISH ★ 4/10
$210.33 $223.35▼ −6.19%▼ −5.48%$226.60 (−7.74%)
Sep 21, 2026
5w ago
144
NEUTRAL ★ 3/10
$322.90 $333.20▲ +3.19%▲ +3.21%$226.60 (−29.82%)
Aug 27, 2026
8w ago
144
NEUTRAL ★ 2/10
$255.21 $239.05▼ −6.33%▼ −6.11%$226.60 (−11.21%)
Aug 10, 2026
11w ago
6-K
NEUTRAL ★ 2/10
$268.93 $271.87▲ +1.09%▲ +0.84%$226.60 (−15.74%)
Jun 12, 2026
19w ago
Institutional Cluster
MIXED ★ 5/10
$380.81 $412.55▲ +8.33%▲ +6.57%$226.60 (−40.50%)
Jun 4, 2026
20w ago
Insider Cluster
NEUTRAL ★ 2/10
$342.93 $346.39▲ +1.01%▲ +0.78%$226.60 (−33.92%)
May 26, 2026
22w ago
Insider Cluster
NEUTRAL ★ 3/10
$302.71 $335.27▲ +10.76%▲ +10.21%$226.60 (−25.14%)
May 26, 2026
22w ago
20-F
BULLISH ★ 7/10
$302.71 $335.27▲ +10.76%▲ +10.21%$226.60 (−25.14%)
May 22, 2026
22w ago
Insider Cluster
NEUTRAL ★ 3/10
$321.22 $304.75▼ −5.13%▼ −5.08%$226.60 (−29.46%)
May 21, 2026
22w ago
Insider Cluster
NEUTRAL ★ 3/10
$306.51 $321.22▲ +4.80%▲ +4.21%$226.60 (−26.07%)
Showing 10 of 14

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Report published Sep 21, 2026