SEC Filing Analysis: ARM HOLDINGS PLC /UK (ARM)

Executive Summary

• Trading Significance: Low
• Key Takeaway: Director Young Sohn files initial statement of beneficial ownership (Form 3) reporting ~2.8k shares/RSUs.
• Market Impact: Neutral; administrative filing establishing baseline compliance.

Company Information

Field	Value
Company	ARM HOLDINGS PLC /UK
Ticker Symbol	ARM
CIK	0001973239
Industry	Semiconductors & Related Devices

Insider Information

Field	Value
Name	SOHN YOUNG
CIK	0001223726
Title/Position	Director
Relationship	Director

Transaction Details

Field	Value
Form Type	3 (Initial Statement)
Filing Date	2026-03-18
Transaction Code	None (Initial Holdings)
Security Type	Ordinary Shares (ADS) & RSUs
Shares Reported	684 (Direct) + 2,141 (RSUs)
Price Per Share	N/A (Holdings Report)
Total Value (Est.)	~$325,000 (based on implied share price)
Ownership Type	Direct

Financial Impact Assessment

Transaction Materiality

Metric	Value
Total Holdings Value	~$325,214 (Est.)
% of Market Cap	~0.0003%
Shares Reported	2,825
% of Shares Outstanding	~0.0003%
Materiality Assessment	Low

Impact Evaluation

• Market Cap Context: With a market cap of $122.26B, this holding is negligible.
• Ownership Concentration: The insider holds a microscopic fraction of the 1.062B shares outstanding.
• Transaction Significance: This is a Form 3, which indicates a new reporting person (Director) listing their existing assets upon joining or filing. It does not represent open market buying or selling pressure.

Market Impact Analysis

Stock Impact Prediction

• Direction: Neutral
• Reasoning: The filing is purely administrative and the dollar value is immaterial relative to the company's size.

Volume & Sentiment

• Expected Volume Impact: None.
• Sentiment Indicator: Neutral.

Additional Context

Transaction Notes

• Holdings Structure: 684 Ordinary Shares held as ADSs, plus 2,141 Restricted Stock Units (RSUs).
• Vesting: RSUs vest in full on May 15, 2026, subject to continued service.
• Timing: Filed March 18, 2026.