ARM ARM HOLDINGS PLC /UK Insider Trading

ARM CAO Laura Kathleen Bartels sold 11,306 shares at $392.70 on 2026-06-02; holdings now 12,135 shares (-48.2%)

Laura Kathleen Bartels, ARM's Chief Accounting Officer, sold 11,306 shares for approximately $4.4M, reducing her holdings from 23,441 shares to 12,135 shares—a reduction of 48.2% of her pre-transaction position. The sale occurred at $392.70, which is 8.1% below the 52-week high of $427.99 and reflects a 244.0% gain over the prior 90 days. As the person responsible for accounting controls and financial reporting at a $415.7B market-cap company, any material change in her holdings may be of interest to investors monitoring executive confidence in current valuation. The magnitude of this reduction—nearly half her position—warrants monitoring whether this is isolated to her circumstance or part of a broader insider activity pattern at the company.

ARM CCO William Abbey sells 6,566 shares for $2.6M; stock up 102.6% in 30 days, 241.4% in 90 days; prior ARM sales poorly timed

William Abbey, Chief Commercial Officer, executed 2 separate sales totaling 6,566 shares for $2,644,251.56 at a blended average price of $402.72, reducing his holdings by 24.2%. ARM stock has surged dramatically—up 102.6% over the prior 30 days and 241.4% over the prior 90 days—placing the transaction near the upper end of the 52-week range ($427.99 high). However, his prior trades at ARM reveal a consistent timing pattern: all 5 previous sales were followed by continued stock appreciation at the 90-day mark (ranging from +23.1% to +66.2%), meaning none of these prior sells were well-timed (0 of 5 well-timed at 90d). This poor historical timing at the same ticker—combined with selling into an exceptionally strong recent rally—raises questions about whether this transaction represents conviction-neutral activity or misalignment with subsequent price performance.

ARM CCO William Abbey sold 4,200 shares at $343.81 (2026-05-28); stock now +93.6% (30d), +235.9% (90d)

William Abbey, Chief Commercial Officer, sold 4,200 shares (13.4% of pre-transaction holdings) at $343.81, reducing his position from 31,329 to 27,129 shares. The timing of this sale is notable: ARM has delivered explosive gains of +93.6% over 30 days and +235.9% over 90 days since the transaction, with the current price of $408.85 sitting 14.7% above the 52-week high. His prior five sales at ARM (spanning 2026-04-24 through 2026-05-21) show a consistent pattern: none were well-timed at the 90-day mark, with returns ranging from +23.1% to +66.2%, indicating he has sold before each subsequent price advance. This current sale follows the same trajectory—the stock has continued its upward move despite his exit, extending a pattern where his ARM exits have systematically preceded material gains.

ARM CCO William Abbey sold 4,655 shares at $287.03 on 2026-05-21; holds 33,629 shares post-sale.

William Abbey, Chief Commercial Officer, sold 4,655 shares (4.7K shares) for a total value of $1,336,124.65 ($1.3M), reducing his holdings from 38,284 to 33,629 shares—a 12.2% reduction in his position. The sale occurred at $287.03, while ARM is currently trading at $306.51, suggesting the stock has appreciated since the transaction date. With ARM's strong recent momentum—up 55.9% over 30 days and 144.1% over 90 days—the transaction occurred during a period of significant appreciation for the company. The sale represents a modest portfolio adjustment by a senior executive, though the lack of additional context on timing or schedule limits inference about motivation.

ARM Chief People Officer Charlotte Claire Eaton sold all 7,805 shares for $2,263,520.50 on 2026-05-21

Charlotte Claire Eaton, ARM's Chief People Officer, executed 2 separate sales totaling 7,805 shares for $2,263,520.50 at a blended average price of $290.01, reducing her holdings to 0 shares. The transactions occurred as ARM trades at $306.51, up 2.6% from its 52-week high of $298.70 and within a 52-week range of $100.02–$298.70. The complete liquidation of her position warrants attention, particularly given the stock's 30-day change of +55.9% and 90-day change of +144.1% preceding the sale. As Chief People Officer at a $323.8B market-cap company, her exit from equity ownership removes an insider perspective from the cap table.

CLO Spencer Collins liquidated entire ARM stake (40.9K shares, $8.8M) at $215.00; stock now $298.23, +15.0% above 52-week high.

Spencer Collins (Chief Legal Officer) sold all 40,941 shares of ARM on 2026-05-19 at $215.00, resulting in complete elimination of his ARM position. Since the transaction, ARM has appreciated significantly to $298.23 current price, representing +15.0% above the 52-week high and +69.9% over 30 days. This reversal stands in stark contrast to Collins' prior ARM trading history: his 5 previous sales at this ticker all experienced positive 90-day returns (ranging from +21.4% to +23.6%), and none were well-timed by the 0.00% metric. The timing pattern of his prior sales—all conducted on the same date (2026-05-11)—followed by consistent appreciation suggests consistent downside execution. Collins' cross-ticker track record also shows 8 prior sells with an average 90d return of +21.6% and a 0.00% well-timed rate, reinforcing a pattern of selling into strength rather than before declines. Investors should note that after a full exit at $215, ARM has moved substantially higher, continuing the pattern observed in his same-ticker history.

ARM CCO William Abbey sells 15,956 shares in 2 transactions (May 19-20) for $3,743,857.60; holds 38,284 shares post-sale

William Abbey, Chief Commercial Officer of ARM Holdings, executed 2 separate sales totaling 15,956 shares for $3,743,857.60 at a blended average price of $234.64 over May 19–20. The stock now trades at $298.23 current price, representing +15.0% above the 52-week high of $259.44, and has appreciated 69.9% over the prior 30 days and 137.5% over 90 days. Abbey reduced his holdings by 29.4%, from 54,240 shares to 38,284 shares post-transaction. The sales occurred during a period of pronounced upward momentum in ARM's equity, with the stock at elevated valuations relative to its recent trading range.

ARM CFO Jason Child sells 31,920 shares ($7.2M) under scheduled 10b5-1 plan; stock up +69.9% in 30 days, +137.5% in 90 days

Jason Child executed a scheduled sale of 31,920 shares at $226.54 under a 10b5-1 trading plan adopted on 2025-05-30, reducing his ARM holdings by 15.5% to 174,232 shares. The sale occurred as the stock has appreciated significantly, with a 30-day return of +69.9% and 90-day return of +137.5% from the transaction date. His prior two sales at ARM produced 30-day returns of +42.6% and +58.3% respectively, while his cross-ticker track record across 2 prior sales averaged +50.4% (30-day) and +57.8% (90-day). Because this transaction is part of a pre-arranged trading plan, it reflects scheduled execution rather than a discretionary trading decision tied to current market conditions or valuation views.

ARM Chief People Officer sells 7,100 shares over 2 days for $1,913,055.00 total, reducing holdings by 47.6%

Charlotte Claire Eaton, Chief People Officer at ARM Holdings, executed 2 separate sales totaling 7,100 shares for $1,913,055.00 on May 20-21, 2026, at prices of $252.25 and $282.77 per share. This sale reduced her holdings from 14,905 shares to 7,805 shares (47.6% reduction in position). The stock has appreciated significantly in the past 90 days (+137.5%) and 30 days (+69.9%), and currently trades at $298.23, above the blended average sale price of $269.44. The substantial reduction in a senior executive's holdings warrants monitoring of whether this reflects portfolio management decisions or broader strategic considerations.

ARM CCO Abbey William sells 10,154 shares for $2.2M across 3 pre-arranged transactions via 10b5-1 plan

Abbey William, Chief Commercial Officer of ARM Holdings, executed 3 separate sales totaling 10,154 shares for $2,151,751.23 at prices ranging from $199.00 to $221.99, reducing his holdings by 15.8% from 64,394 to 54,240 shares. This transaction is part of a pre-arranged 10b5-1 trading plan, meaning the sales were scheduled in advance rather than discretionary, so no inference about timing or conviction can be drawn. At the current price of $223.15, the stock is up 33.8% over the prior 30 days and 75.4% over 90 days, indicating strong recent momentum. The sale occurred well before the stock's 52-week high of $239.50, which is within reachable distance from the execution prices.