What SEC filings does Arm Holdings plc submit to the SEC?

Arm Holdings plc (ARM) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about ARM?

A Form 4 for ARM discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from Arm Holdings plc?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for ARM?

The 10-K is Arm Holdings plc's annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all ARM SEC filings directly on EDGAR?

You can view all historical Arm Holdings plc filings on the SEC EDGAR company page for ARM. Each filing card on this page links directly to the original SEC document.

How often does Arm Holdings plc file with the SEC?

Arm Holdings plc files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling ARM shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

ARM SEC Filing News — Arm Holdings plc

Latest SEC filings for Arm Holdings plc (ARM) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-09-23.

Arm Holdings plc researches, develops, licenses, and markets central processing unit (CPU) intellectual property (IP), graphics processing unit IP, systems IP, compute subsystems (CSS), and associated software, tools and related services. The company provides a product portfolio, including CPU IP, GPU and neural processing unit (NPU) accelerators, system IP such as interconnects, compute platform products including pre-integrated CSSs, and development tools and software. The company serves semic…

Sector: Technology Industry: Semiconductors Market Cap: $252.3B CIK: 1973239

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for ARM currently lean bearish. Of the 20 filing records displayed, 12 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

ARM Filing Activity Snapshot 2026-05-20 — 2026-09-23

Insider Transactions (Form 4)

0 buys vs 12 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$8.80M

Collins Spencer (Chief Legal Officer) · 2026-05-21

40,941 shares · Form 4

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 16 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 16 filings in this group are Form 4s for Arm Holdings plc.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 16 insider filings shown, the breakdown is 12 open-market sale, 2 compensation award, 1 option exercise and 1 gift. 12 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Open-market sale ×12: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Compensation award ×2: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Option exercise ×1: The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.
Gift ×1: Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Form 4 Open-market sale Insider Selling 2026-09-23

ARM insider Child Jason (Chief Financial Officer) sold 10,400 shares (~$3.12M)

Child Jason, listed as Chief Financial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 10,400 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	10,400	$300.00	$3.12M

Filing: Form 4 (Insider Transaction) Insider: Child Jason (Chief Financial Officer) Shares: 10,400 Est. Value: $3.12M

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-16

ARM insider Form 4 filed for equity award, exercise, or tax withholding

Abbey William (Chief Commercial Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award derivative · Restricted Stock Units	17,288	—	—

Filing: Form 4 (Insider Transaction) Insider: Abbey William (Chief Commercial Officer)

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-09-10

ARM insider Form 4 filed for equity award, exercise, or tax withholding

Haas Rene A. (Director, Chief Executive Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	64	$108.33	$6.9K
`A`	Compensation award derivative · Restricted Stock Units	425,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Haas Rene A. (Director, Chief Executive Officer) Shares: 64

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-31

ARM insider Child Jason (Chief Financial Officer) sold 10,400 shares (~$2.66M)

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	10,400	$255.33	$2.66M

Filing: Form 4 (Insider Transaction) Insider: Child Jason (Chief Financial Officer) Shares: 10,400 Est. Value: $2.66M

View on SEC EDGAR → Open Filing Document →

Form 4 Option exercise Tax / Compensation Filing 2026-08-18

ARM insider Form 4 filed for equity award, exercise, or tax withholding

Bartels Laura Kathleen (Chief Accounting Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

The insider converted options into shares. The exercise price was fixed when the options were granted, so the timing usually tracks an expiry schedule.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	862	—	—
`M`	Option exercise	819	—	—
`F`	Tax withholding on vested shares	856	$271.43	$232.3K
`M`	Option exercise derivative · Restricted Stock Units	862	—	—
`M`	Option exercise derivative · Restricted Stock Units	819	—	—

Filing: Form 4 (Insider Transaction) Insider: Bartels Laura Kathleen (Chief Accounting Officer) Shares: 2,537

View on SEC EDGAR → Open Filing Document →

Form 4 Gift Tax / Compensation Filing 2026-08-11

ARM insider Form 4 filed for equity award, exercise, or tax withholding

Sine Jeffrey (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`G`	Gift	9,572	—	—

Filing: Form 4 (Insider Transaction) Insider: Sine Jeffrey (Director) Shares: 9,572

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-04

ARM insider Bartels Laura Kathleen (Chief Accounting Officer) sold 11,306 shares (~$4.44M)

Bartels Laura Kathleen, listed as Chief Accounting Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 11,306 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	11,306	$392.70	$4.44M

Filing: Form 4 (Insider Transaction) Insider: Bartels Laura Kathleen (Chief Accounting Officer) Shares: 11,306 Est. Value: $4.44M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-03

ARM insider Abbey William (Chief Commercial Officer) sold 6,566 shares (~$2.64M)

Abbey William, listed as Chief Commercial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 6,566 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	2,644	$383.73	$1.01M
`S`	Open-market sale	3,922	$415.52	$1.63M

Filing: Form 4 (Insider Transaction) Insider: Abbey William (Chief Commercial Officer) Shares: 6,566 Est. Value: $2.64M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-06-01

ARM insider Abbey William (Chief Commercial Officer) sold 4,200 shares (~$1.44M)

Abbey William, listed as Chief Commercial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 4,200 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	4,200	$343.81	$1.44M

Filing: Form 4 (Insider Transaction) Insider: Abbey William (Chief Commercial Officer) Shares: 4,200 Est. Value: $1.44M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-26

ARM insider Abbey William (Chief Commercial Officer) sold 2,300 shares (~$703.4K)

Abbey William, listed as Chief Commercial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 2,300 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	2,300	$305.82	$703.4K

Filing: Form 4 (Insider Transaction) Insider: Abbey William (Chief Commercial Officer) Shares: 2,300 Est. Value: $703.4K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-22

ARM insider Abbey William (Chief Commercial Officer) sold 4,655 shares (~$1.34M)

Abbey William, listed as Chief Commercial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 4,655 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	4,655	$287.03	$1.34M

Filing: Form 4 (Insider Transaction) Insider: Abbey William (Chief Commercial Officer) Shares: 4,655 Est. Value: $1.34M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-22

ARM insider Eaton Charlotte Claire (Chief People Officer) sold 7,805 shares (~$2.26M)

Eaton Charlotte Claire, listed as Chief People Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 7,805 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	2,805	$288.10	$808.1K
`S`	Open-market sale	5,000	$291.08	$1.46M

Filing: Form 4 (Insider Transaction) Insider: Eaton Charlotte Claire (Chief People Officer) Shares: 7,805 Est. Value: $2.26M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-21

ARM insider Collins Spencer (Chief Legal Officer) sold 40,941 shares (~$8.80M)

Collins Spencer, listed as Chief Legal Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 40,941 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	40,941	$215.00	$8.80M

Filing: Form 4 (Insider Transaction) Insider: Collins Spencer (Chief Legal Officer) Shares: 40,941 Est. Value: $8.80M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-21

ARM insider Abbey William (Chief Commercial Officer) sold 15,956 shares (~$3.74M)

Abbey William, listed as Chief Commercial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 15,956 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	10,887	$224.14	$2.44M
`S`	Open-market sale	5,069	$257.18	$1.30M

Filing: Form 4 (Insider Transaction) Insider: Abbey William (Chief Commercial Officer) Shares: 15,956 Est. Value: $3.74M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-21

ARM insider Child Jason (Chief Financial Officer) sold 31,920 shares (~$7.23M)

Child Jason, listed as Chief Financial Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 31,920 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	31,920	$226.54	$7.23M

Filing: Form 4 (Insider Transaction) Insider: Child Jason (Chief Financial Officer) Shares: 31,920 Est. Value: $7.23M

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-05-21

ARM insider Eaton Charlotte Claire (Chief People Officer) sold 7,100 shares (~$1.91M)

Eaton Charlotte Claire, listed as Chief People Officer at ARM HOLDINGS PLC /UK, reported an open-market sale of 7,100 ARM shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`S`	Open-market sale	3,100	$252.25	$782.0K
`S`	Open-market sale	4,000	$282.77	$1.13M

Filing: Form 4 (Insider Transaction) Insider: Eaton Charlotte Claire (Chief People Officer) Shares: 7,100 Est. Value: $1.91M

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 4 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. Arm Holdings plc has 4 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-09-21

ARM Form 144 filed for proposed insider sale by Child Jason (10,400 shares) ~$3.12M

Child Jason filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Child Jason Shares: 10,400 Est. Value: $3.12M

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-27

ARM Form 144 filed for proposed insider sale by Child Jason (10,400 shares) ~$2.66M

Filing: Form 144 (Proposed Sale Notice) Insider: Child Jason Shares: 10,400 Est. Value: $2.66M

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-05-21

ARM Form 144 filed for proposed insider sale by Eaton Charlotte Claire (11,805 shares) ~$3.39M

Eaton Charlotte Claire filed a Form 144 with the SEC indicating intent to sell ARM (ARM HOLDINGS PLC /UK) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: Eaton Charlotte Claire Shares: 11,805 Est. Value: $3.39M

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-05-20

ARM Form 144 filed for proposed insider sale by Eaton Charlotte Claire (3,100 shares) ~$782.0K

Filing: Form 144 (Proposed Sale Notice) Insider: Eaton Charlotte Claire Shares: 3,100 Est. Value: $782.0K

View on SEC EDGAR → Open Filing Document →

How we classify Arm Holdings plc's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on ARM. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — ARM SEC Filings

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ARM Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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