William D. Mosley
William D. Mosley: CEO · Director at Seagate and Director at Cirrus Logic. What William D. Mosley holds in 2 AI and semiconductor companies tracked on Silicon Floor, from their SEC filings, broken down: the shares held and how, then any restricted shares, options or other rights declared.
Seagate (STX)
William D. Mosley holds 362,108 Seagate shares (0.16% of the company), worth about $321.9M at the last price, according to the Form 4 of Oct 1, 2026.
- Shares held: 362,108 (0.16%), $321.9M — Held in their own name.
- Options: 153,700 (0.07%), $136.6M — The right to buy 153,700 shares at $158.40 each, until 2032. Not bought yet.
- Options: 103,060 (0.05%), $91.6M — The right to buy 103,060 shares at $101.34 each, until 2031. Not bought yet.
- Options: 83,100 (0.04%), $73.9M — The right to buy 83,100 shares at $46.23 each, until 2027. Not bought yet.
- Options: 31,856 (0.01%), $28.3M — The right to buy 31,856 shares at $850.24 each, until 2033. Not bought yet.
- Share units: 13,276 (0.01%), $11.8M — Seagate promised them as pay: each unit becomes a share when it vests, if its conditions are met. No vote until then.
Cirrus Logic (CRUS)
William D. Mosley holds 3,622 Cirrus Logic shares (0.01% of the company), worth about $439,058.84 at the last price, according to the Form 4 of Jul 31, 2026.
- Shares held: 3,622 (0.01%), $439,058.84 — Held in their own name.
- Options: 4,163 (0.01%), $504,638.86 — The right to buy 4,163 shares at $129.24 each, until 2034. Not bought yet.
- Share units: 1,623 (0.00%), $196,740.06 — Cirrus Logic promised them as pay: each unit becomes a share when it vests, if its conditions are met. No vote until then.
Declarations
- Seagate (STX) — Form 4 of Oct 1, 2026 (CEO): open-market sale of 360 at $929.01; open-market sale of 855 at $930.03; 362,108 shares after 0001137789-26-000262
- Seagate (STX) — Form 4 of Oct 1, 2026 (CEO): option exercise or conversion of 14,000 at $46.23; open-market sale of 360 at $898.10; 373,110 shares after 0001137789-26-000261
- Seagate (STX) — Form 4 of Sep 15, 2026 (CEO): option exercise or conversion of 177,000; open-market sale of 97,889 at $772.14; 378,108 shares after 0001137789-26-000252
- Seagate (STX) — Form 4 of Sep 14, 2026 (CEO): option exercise or conversion of 3,319; open-market sale of 1,870 at $781.23; 298,998 shares after 0001137789-26-000239
- Seagate (STX) — Form 4 of Sep 10, 2026 (CEO): option exercise or conversion of 2,815; open-market sale of 1,534 at $862.13; 297,548 shares after 0001137789-26-000222
- Seagate (STX) — Form 4 of Sep 1, 2026 (CEO): option exercise or conversion of 14,000 at $46.23; open-market sale of 357 at $804.61; 295,168 shares after 0001137789-26-000197
- Seagate (STX) — Form 4 of Aug 21, 2026 (CEO): option exercise or conversion of 6,404; open-market sale of 3,438 at $849.35; 311,168 shares after 0001137789-26-000182
- Seagate (STX) — Form 4 of Aug 3, 2026 (CEO): open-market sale of 400 at $819.41; open-market sale of 520 at $820.35; 295,517 shares after 0001137789-26-000164
- Seagate (STX) — Form 4 of Aug 3, 2026 (CEO): option exercise or conversion of 14,000 at $46.23; open-market sale of 80 at $783.84; 312,597 shares after 0001137789-26-000163
- Cirrus Logic (CRUS) — Form 4 of Jul 31, 2026: grant or award of 1,998; 3,622 shares after 0001388390-26-000006
- Seagate (STX) — Form 4 of Jul 1, 2026 (CEO): open-market sale of 1,480 at $919.64; open-market sale of 880 at $920.57; 311,517 shares after 0001137789-26-000148
- Seagate (STX) — Form 4 of Jul 1, 2026 (CEO): option exercise or conversion of 14,000 at $46.23; open-market sale of 320 at $887.97; 320,860 shares after 0001137789-26-000147
- Seagate (STX) — Form 4 of Jun 12, 2026 (CEO): option exercise or conversion of 3,319; open-market sale of 1,768 at $880.19; 327,517 shares after 0001137789-26-000138
- Seagate (STX) — Form 4 of Jun 10, 2026 (CEO): option exercise or conversion of 2,815; open-market sale of 1,537 at $821.74; 325,966 shares after 0001137789-26-000129
- Seagate (STX) — Form 4 of Jun 1, 2026 (CEO): open-market sale of 320 at $916.78; open-market sale of 480 at $918.75; 323,591 shares after 0001137789-26-000117
Sources: SEC Schedules 13D and 13G (stakes above 5%, which count everything a person votes or can acquire within 60 days) and Forms 3, 4 and 5 (the shares a director, officer or 10% owner holds, filed within two business days of each trade). Values at the last price.