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EdgarHawk

William D Mosley

CEO

Director Officer

Latest: CEO selling · April 2026

29 filings analyzed · 1 company · Latest 2026-06-15

Companies

Company Buys Sells Direction
Seagate Technology Holdings plc STX 0 247 Net selling

Activity

June 2026
Sell
1,768 shares
$1,556,394
Significance 3/10

CEO William D Mosley sold 1,768 shares of STX at $880.19 on 2026-06-12 for $1,556,393.85

William D Mosley, CEO of Seagate Technology, sold 1,768 shares at $880.19, reducing his non-derivative holdings from 329,285 to 327,517 shares (a -0.5% reduction). This follows a cluster of five prior sales on 2026-06-01, suggesting continued periodic reductions in a single-ticker context. While STX has appreciated significantly over the 90-day window (+141.9%) and 30-day window (+28.1%), and currently trades at $1018.80 (near its 52-week high of $1032.52), the prior outcomes from his same-ticker history at STX are not yet measurable, providing no timing pattern to assess. With 16,595 restricted share units remaining in Table II derivatives, the CEO retains substantial equity upside. The company's 38.9% annual revenue growth and $748.0M quarterly net income reflect strong operational momentum, though the elevated P/E of 147.01 reflects current market valuation.

Sell
2,855 shares
$2,345,874
Significance 4/10

STX CEO William D Mosley sold 2,854 shares for $2,345,873.82 on 2026-06-10; retains 325,966 shares post-transaction.

William D Mosley, CEO of Seagate Technology Holdings plc, filed 2 separate sales totaling 2,854 shares for $2,345,873.82 at a blended average price of $821.74 on 2026-06-10, reducing his non-derivative holdings by 0.9% to 325,966 shares. The insider retains material derivative holdings of 24,558 shares through restricted share units, indicating an ongoing stake in the company. The sales occurred as STX traded at $868.09 (current), 10.2% below its 52-week high of $966.80, while the broader trend shows a 90-day gain of 126.2% and 30-day appreciation of 7.3%. Mosley's cross-ticker track record includes 20 prior sells, though same-ticker outcomes at STX remain unmeasurable (5 prior STX sells on 2026-06-01 with no 30-day or 90-day data yet available). The company reports strong fundamentals: $3.1B latest quarterly revenue, $748.0M net income, and 38.9% annual revenue growth, though valuation is stretched at a P/E of 125.27. This represents a routine partial reduction of non-derivative holdings by an executive with substantial remaining direct and derivative exposure to the company.

Sell
13,780 shares
$12,746,389
Significance 4/10

CEO William D Mosley sells 13,780 shares for $12,746,389.45 via 10b5-1 plan; stock up 27.5% in 30d.

William D Mosley, CEO of Seagate Technology Holdings plc, executed 20 separate sales totaling 13,780 shares for $12,746,389.45 on 2026-06-01, reducing his holding by 4.1% to 323,591 shares. This sale was conducted under a pre-arranged 10b5-1 trading plan adopted on 2026-02-18, meaning it was scheduled rather than discretionary. The stock has risen 27.5% over the prior 30 days and 147.1% over the prior 90 days, and Seagate's revenue grew 38.9% year-over-year with net income of $748,000,000.00 in the latest quarter. His prior five sales at STX on 2026-05-20 each showed positive returns in the 20.7%–23.1% range over their respective 30- and 90-day windows, consistent with a pattern of trading into strength. Because this sale is governed by a 10b5-1 plan adopted in February, it reflects a pre-set schedule rather than a real-time market judgment, reducing the interpretive weight typically assigned to insider-initiated timing.

medium
Sell
16,220 shares
$14,601,435
Significance 6/10

STX CEO William D Mosley sells 16,220 shares for $14,601,434.70 via 29 transactions; scheduled 10b5-1 plan

William D Mosley, CEO of Seagate Technology Holdings plc, executed 29 separate sales totaling 16,220 shares for $14,601,434.70 on 2026-06-01 under a pre-arranged 10b5-1 trading plan adopted on 2026-02-18. This is a scheduled, non-discretionary transaction, so no timing inference is appropriate. Post-transaction, Mosley retains 337,371 shares in non-derivative holdings while maintaining 139,100 shares through derivative securities (NQ Options), representing a -4.6% reduction in the non-derivative portion. The blended average sale price of $900.21 compares favorably to the current price of $926.61, though the stock is -1.5% from its 52-week high of $940.79. Mosley's cross-ticker track record across 20 prior sells shows an average 90-day return of +27.3%; at STX specifically, his five prior sales on 2026-05-20 posted 90-day returns between +20.7% and +23.1%. The continued holdings in both share and derivative form, combined with execution through a pre-scheduled plan rather than discretionary action, indicate the transaction reflects liquidity management within a formal compliance framework rather than a signal of conviction or concern about the company's prospects.

May 2026
medium
Sell
30,000 shares
$22,538,568
Significance 6/10

CEO William D Mosley sells 30,000 shares ($22.5M) via scheduled 10b5-1 plan; holdings drop to 339.6K shares.

William D Mosley executed 19 separate sales totaling 30,000 shares for $22,538,568.50 on 2026-05-20 under a pre-arranged 10b5-1 trading plan adopted on 2026-02-18, reducing his holdings from 369.6K to 339.6K shares. The blended average sale price was $751.29, while the current stock price stands at $810.46 and the 30-day change is +44.8% and 90-day change is +97.1%, indicating substantial recent appreciation. Because this transaction is part of a scheduled 10b5-1 plan, it reflects execution of a predetermined schedule rather than a discretionary trading decision, and therefore timing observations are not applicable to this filing. The sale represents an 8.1% reduction of his pre-transaction holdings.

April 2026
Sell
20,000 shares
$8,414,638
Significance 7/10

STX CEO Mosley sold 20,000 shares in 21 separate transactions for $8.4M, blended avg $420.73/share

William D Mosley (CEO) executed 21 separate sales on 2026-04-01 totaling 20,000 shares ($8.4M), reducing his holdings by 5.3% from 375.6K to 355.6K shares. The sales occurred across a price range of $399.05 to $428 per share, suggesting a large block distribution over intraday trading windows. This is the third substantial exit by the same executive in 13 days—he also sold 30 shares on 2026-03-19 and 120 shares across four tranches on 2026-03-02—establishing a consistent liquidation pattern at the company level. Current stock price is $429.36, only 1.6% above the blended average sale price of $420.73, indicating the stock has not materially advanced since these sales; his recent same-ticker sales (2026-03-02 and 2026-03-19) have all posted positive intraday returns (+5.2% to +12.0% at 30 days), but timing outcomes beyond 90 days are not yet measurable given the recent filing date.

March 2026
medium
Sell
24,584 shares
$10,000,034
Significance 6/10

CEO Mosley sells 24,584 STX shares for $10.0M at $406.77; holds 375,591 shares post-sale

William D. Mosley, CEO of Seagate Technology, sold 24,584 shares on 2026-03-19 at $406.77, generating $10,000,033.68 in proceeds, reducing his holdings from 400,175 to 375,591 shares. This sale occurred against the backdrop of strong fundamental momentum: the company reported $2.8B in quarterly revenue and $593.0M net income, with annual revenue growth of +38.9% and a 90-day stock price gain of +42.9%. The transaction price of $406.77 is 9.5% below the 52-week high of $446.57, and the current stock price stands at $404.02, nearly aligned with the execution price. Mosley's cross-ticker track record shows 20 prior open-market sells, though no prior trades at STX have measurable timing outcomes yet, limiting comparison of his execution pattern at this specific ticker.

medium
Sell
20,000 shares
$7,695,262
Significance 6/10

Seagate CEO William Mosley sells 20,000 shares across 22 transactions for $7.7M (blended avg $384.76)

Mosley conducted 22 separate sales on 2026-03-02 totaling 20,000 shares ($7.7M), reducing his holdings by 4.8% from 415.9K to 395.9K shares at blended average price $384.76. The stock currently trades at $357.62, down 19.9% from its 52-week high of $446.57 and down 12.3% over the past 30 days, though up 38.2% over 90 days. The CEO retains substantial equity (395.9K shares post-transaction), and the company shows strong fundamentals with 38.9% annual revenue growth, $2.8B quarterly revenue, and $593.0M net income. The multi-tranche execution across a wide price range ($375.84–$407.66) suggests staged liquidation rather than a single opportunistic trade, though the current price is below the transaction's blended average.

February 2026
Sell
20,000 shares
$8,585,359
Significance 7/10

CEO William D Mosley sells 20,000 STX shares in 16 transactions for $8,585,358.99 at blended avg $429.27

William D Mosley, CEO of Seagate Technology Holdings plc, executed 16 separate sales totaling 20,000 shares (20.0K shares) for $8,585,358.99 ($8.6M) on 2026-02-02, reducing his holdings from 430,056 shares (430.1K shares) to 410,056 shares (410.1K shares), a net reduction of 4.7%. The sales occurred at prices ranging from $401.10 to $432.19 per share with a blended average price of $429.27, very close to the current price of $444.45 and near the 52-week high of $446.57 (within 0.5% of peak). Notably, Mosley executed similar sales just one month prior on 2026-01-02 at similar scales, and his prior same-ticker history shows strong subsequent price appreciation in the 30-day window after those earlier sales (+41.1% to +45.0%), suggesting a pattern of selling into strength. The stock has appreciated 54.6% over the past 30 days and 61.2% over 90 days, and with a P/E of 64.13 and annual revenue growth of 38.9%, the company is trading at a premium valuation, creating context for insider disposition activity at elevated prices.

January 2026
Sell
20,000 shares
$5,711,245
Significance 6/10

Seagate CEO sells 20,000 shares ($5.7M) in 9 tranches on 2026-01-02 at $281.09–$289.03, leaving 429.9K shares held.

William D Mosley, CEO of Seagate Technology Holdings plc, executed 9 separate sales totaling 20,000 shares for $5,711,245.32 on 2026-01-02 at prices ranging from $281.09 to $289.03 with a blended average of $285.56. This represents a 4.4% reduction in his pre-transaction holdings of 449.9K shares. The timing is noteworthy: the stock currently trades at $330.42 and has appreciated 18.5% over the past 30 days and 47.3% over the past 90 days, positioned at its 52-week high of $330.42. His prior 5 trades at Seagate (all sells on 2025-12-01) each showed modest positive 30-day returns (+1.2% to +3.0%), suggesting his recent Seagate sales have not preceded material declines. The CEO retains substantial holdings (429.9K shares) despite this reduction, and Seagate's fundamentals remain strong with $2.6B quarterly revenue, +38.9% annual growth, and $549.0M net income, though the P/E of 47.68 reflects elevated valuation.

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