Gene M. Zamiska
CIK 1456385 · View on SEC EDGAR ↗
Insider
First SEC filing: Sept. 3, 2019 · Latest: Sept. 3, 2019
On this page
Insider at
Insider transactions
0 buys (P)
4 sells (S)
Net:
$-468,792
+ 68 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
68 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 28, 2025 | WDC | S 10b5-1 | 353 | $80.90 | $28,558 | 27,425 Direct | -1.27% | Disposed | 481.6% (price as of 2026-08-21) |
| Aug. 26, 2025 | WDC | S 10b5-1 | 814 | $79.10 | $64,387 | 28,122 Direct | -2.81% | Disposed | 494.8% (price as of 2026-08-21) |
| Aug. 22, 2025 | WDC | S 10b5-1 | 1,828 | $74.78 | $136,698 | 29,732 Direct | -5.79% | Disposed | 529.2% (price as of 2026-08-21) |
| Aug. 21, 2025 | WDC | S 10b5-1 | 3,160 | $75.68 | $239,149 | 31,560 Direct | -9.10% | Disposed | 521.7% (price as of 2026-08-21) |
| June 17, 2025 | WDC | S 10b5-1 | 245 | $58.01 | $14,212 | 39,604 Direct | -0.61% | Disposed | 711.1% (price as of 2026-08-21) |
| June 5, 2025 | WDC | S 10b5-1 | 1,729 | $54.88 | $94,888 | 40,089 Direct | -4.13% | Disposed | 757.3% (price as of 2026-08-21) |
| March 12, 2025 | WDC | S 10b5-1 | 456 | $43.37 | $19,777 | 43,320 Direct | -1.04% | Disposed | 984.9% (price as of 2026-08-21) |
| March 7, 2025 | WDC | S 10b5-1 | 1,659 | $41.36 | $68,616 | 43,776 Direct | -3.65% | Disposed | 1037.6% (price as of 2026-08-21) |
| Nov. 29, 2024 | WDC | S 10b5-1 | 313 | $72.63 | $22,733 | 28,383 Direct | -1.09% | Disposed | 757.0% (price as of 2026-08-21) |
| Nov. 26, 2024 | WDC | S 10b5-1 | 658 | $69.99 | $46,053 | 28,863 Direct | -2.23% | Disposed | 789.4% (price as of 2026-08-21) |
| Nov. 21, 2024 | WDC | S 10b5-1 | 376 | $64.47 | $24,241 | 29,971 Direct | -1.24% | Disposed | 865.5% (price as of 2026-08-21) |
| Oct. 28, 2024 | WDC | S | 1,993 | $69.94 | $139,390 | 30,608 Direct | -6.11% | Disposed | 790.0% (price as of 2026-08-21) |
| Sept. 4, 2024 | WDC | S 10b5-1 | 2,169 | $61.96 | $134,391 | 32,601 Direct | -6.24% | Disposed | 904.6% (price as of 2026-08-21) |
| Aug. 29, 2024 | WDC | S 10b5-1 | 315 | $63.32 | $19,946 | 35,915 Direct | -0.87% | Disposed | 883.1% (price as of 2026-08-21) |
| Aug. 27, 2024 | WDC | S 10b5-1 | 2,900 | $61.48 | $178,292 | 37,448 Direct | -7.19% | Disposed | 912.5% (price as of 2026-08-21) |
| Aug. 21, 2024 | WDC | S 10b5-1 | 417 | $64.89 | $27,059 | 28,870 Direct | -1.42% | Disposed | 859.3% (price as of 2026-08-21) |
| June 17, 2024 | WDC | S 10b5-1 | 219 | $78.00 | $17,082 | 29,507 Direct | -0.74% | Disposed | 698.0% (price as of 2026-08-21) |
| May 21, 2024 | WDC | S 10b5-1 | 416 | $71.88 | $29,902 | 30,321 Direct | -1.35% | Disposed | 766.0% (price as of 2026-08-21) |
| April 8, 2024 | WDC | S 10b5-1 | 443 | $75.00 | $33,225 | 30,958 Direct | -1.41% | Disposed | 730.0% (price as of 2026-08-21) |
| March 1, 2024 | WDC | S 10b5-1 | 7,677 | $61.00 | $468,297 | 34,492 Direct | -18.21% | Disposed | 920.4% (price as of 2026-08-21) |
| March 1, 2024 | WDC | S 10b5-1 | 2,807 | $62.00 | $174,034 | 31,685 Direct | -8.14% | Disposed | 904.0% (price as of 2026-08-21) |
| March 1, 2024 | WDC | S 10b5-1 | 284 | $63.00 | $17,892 | 31,401 Direct | -0.90% | Disposed | 888.1% (price as of 2026-08-21) |
| Sept. 6, 2023 | WDC | S 10b5-1 | 2,169 | $45.42 | $98,516 | 43,011 Direct | -4.80% | Disposed | 1270.5% (price as of 2026-08-21) |
| Sept. 7, 2022 | WDC | S 10b5-1 | 2,169 | $40.90 | $88,712 | 31,554 Direct | -6.43% | Disposed | 1421.9% (price as of 2026-08-21) |
| May 4, 2022 | WDC | S 10b5-1 | 4,776 | $63.00 | $300,888 | 26,719 Direct | -15.16% | Disposed | 888.1% (price as of 2026-08-21) |
| Nov. 2, 2021 | WDC | S | 2,607 | $55.00 | $143,385 | 31,495 Direct | -7.64% | Disposed | 1031.8% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Sept. 18, 2025 | WDC | Dividend Equivalent Rights | Common Stock (26) | — | — | 26 | Acquired |
| Aug. 27, 2025 | WDC | Dividend Equivalent Rights | Common Stock (1) | — | — | 1 | Disposed |
| Aug. 25, 2025 | WDC | Dividend Equivalent Rights | Common Stock (3) | — | — | 3 | Disposed |
| Aug. 21, 2025 | WDC | Dividend Equivalent Rights | Common Stock (6) | — | — | 6 | Disposed |
| Aug. 20, 2025 | WDC | Dividend Equivalent Rights | Common Stock (11) | — | — | 11 | Disposed |
| June 18, 2025 | WDC | Dividend Equivalent Rights | Common Stock (67) | — | — | 67 | Acquired |
| Aug. 12, 2023 | WDC | Dividend Equivalent Rights | Common Stock (108) | — | — | 108 | Disposed |
| Aug. 12, 2022 | WDC | Dividend Equivalent Rights | Common Stock (108) | — | — | 108 | Disposed |
| Aug. 12, 2021 | WDC | Dividend Equivalent Rights | Common Stock (108) | — | — | 108 | Disposed |
| Aug. 12, 2020 | WDC | Dividend Equivalent Rights | Common Stock (108) | — | — | 108 | Disposed |
| April 17, 2020 | WDC | Dividend Equivalent Rights | Common Stock (186) | — | — | 186 | Acquired |
| Jan. 21, 2020 | WDC | Dividend Equivalent Rights | Common Stock (114) | — | — | 114 | Acquired |
| Oct. 22, 2019 | WDC | Dividend Equivalent Rights | Common Stock (132) | — | — | 132 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 3, 2019 | WDC | Common Stock | 15,506 | Direct |