Research Open Terminal →

← Unusual insider activity · Company hub

WDC Western Digital Corp.

Insider figures are trailing 90 days, open-market Form 4 only. Institutional figures are the latest reported quarter. These windows are not simultaneous.

-$14.7M net selling - trailing 90 days

0 buyers - 6 unique sellers

Historical context: most recent complete month (2026-09) is the 44th percentile of this ticker's monthly net P/S flow over 24 complete months. Lower percentiles are more selling; higher are more buying. P10–P90: -$10.3M to $0.

3 accumulating - 10 trimming - 1 unchanged

14 comparable institutions - Q2 2026

open-market Form 4 only - grants, exercises, tax withholding excluded. ~ derived from SEC-reported shares x price.

Insider net $ (monthly)open-market Form 4 only - grants, exercises, tax withholding excluded$20.0M$10.0M$0-$10.0M-$20.0M2024-10 -$7.7M2024-11 -$93K2024-12 $02025-01 $02025-02 $02025-03 -$88K2025-04 $02025-05 -$548K2025-06 -$109K2025-07 $02025-08 -$2.9M2025-09 -$1.0M2025-10 $02025-11 -$5.2M2025-12 -$5.5M2026-01 -$102K2026-02 -$18.5M2026-03 -$8.8M2026-04 -$137K2026-05 -$15.9M2026-06 -$3.3M2026-07 -$2.0M2026-08 -$10.9M2026-09 -$1.7MInstitutional shares (majority-gated quarters)1.0B500.0M02025-Q4 768.2M sh2026-Q1 757.9M sh2026-Q2 327.1M shOct 24Dec 24Feb 25Apr 25Jun 25Aug 25Oct 25Dec 25Feb 26Apr 26Jun 26Aug 26Q4 2025Q1 2026Q2 2026~ derived from SEC-reported shares x price. Hatched: excluded (implausible price) or unpriced.

Who is responsible

Insider Role Net activity Rows
Tan Irving Chief Executive Officer -~$8.9M 7
STREETER STEPHANIE A — -~$1.6M 2
Cole Martin I — -~$1.6M 24
Tregillis Cynthia L Chief Legal Officer & Corp Sec -~$1.5M 5
Gubbi Vidyadhara K Chief of Global Operations -~$0.8M 1
Tregillis Cynthia L Chief Legal Officer & Corp Sec -~$0.2M 1

Transactions

Date Insider Role Type Shares Price Value
September 4, 2026 Gubbi Vidyadhara K Chief of Global Operations S -1795 459.8732 ~$0.8M
September 4, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -432 451.2 ~$0.2M
September 1, 2026 STREETER STEPHANIE A — S -1600 455 ~$0.7M
August 31, 2026 STREETER STEPHANIE A — S -2000 447.06 ~$0.9M
August 27, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -1007 478.36 ~$0.5M
August 26, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -476 450.78 ~$0.2M
August 24, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -684 446.17 ~$0.3M
August 21, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -235 477.27 ~$0.1M
August 11, 2026 Tan Irving Chief Executive Officer 7 reported sale rows 20000 — ~$8.9M
July 28, 2026 Cole Martin I — 24 reported sale rows 3565 — ~$1.6M
July 21, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -808 529.63 ~$0.4M
June 9, 2026 Cole Martin I — 26 reported sale rows 3200 — ~$1.6M
June 5, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -432 545.6 ~$0.2M
June 1, 2026 Gubbi Vidyadhara K Chief of Global Operations S -2475 556.24 ~$1.4M
May 28, 2026 KIDDOO BRUCE E — S -750 528.52 ~$0.4M
May 27, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -214 539.63 ~$0.1M
May 22, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -308 488.61 ~$0.2M
May 21, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -106 458.87 ~$49K
May 11, 2026 Davis Brian Scott Chief Sales & Mrktng Officer 16 reported sale rows 9720 — ~$4.9M
May 4, 2026 Gubbi Vidyadhara K Chief of Global Operations S -4674 443.185 ~$2.1M
May 1, 2026 Tan Irving Chief Executive Officer 9 reported sale rows 20000 — ~$8.2M
April 21, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -363 377.09 ~$0.1M
March 6, 2026 Gubbi Vidyadhara K Chief of Global Operations S -8518 255.325 ~$2.2M
March 4, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec 2 reported sale rows 9324 — ~$2.5M
March 4, 2026 Gubbi Vidyadhara K Chief of Global Operations 2 reported sale rows 10148 — ~$2.7M
March 2, 2026 Cole Martin I — 9 reported sale rows 5000 — ~$1.4M
February 26, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -214 286.11 ~$61K
February 24, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -308 281.7 ~$87K
February 23, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -130 283.83 ~$37K
February 17, 2026 Davis Brian Scott Chief Sales & Mrktng Officer 12 reported sale rows 10000 — ~$2.8M
February 6, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -6780 270.49 ~$1.8M
February 5, 2026 MASSENGILL MATTHEW E — 10 reported sale rows 34326 — ~$8.9M
February 2, 2026 Tan Irving Chief Executive Officer 14 reported sale rows 18800 — ~$4.8M
January 21, 2026 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -447 229 ~$0.1M
December 5, 2025 Gubbi Vidyadhara K Chief of Global Operations 2 reported sale rows 8943 — ~$1.5M
December 4, 2025 Alexy Kimberly — S -2000 160.0824 ~$0.3M
December 4, 2025 Gubbi Vidyadhara K Chief of Global Operations S -13877 159.9416 ~$2.2M
December 2, 2025 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -2801 160.5682 ~$0.4M
December 1, 2025 Cole Martin I — 8 reported sale rows 6000 — ~$1.0M
November 25, 2025 Alexy Kimberly — S -1768 154 ~$0.3M
November 25, 2025 Oulman Roxanne — S -1800 154.42 ~$0.3M
November 5, 2025 Cole Martin I — 11 reported sale rows 10000 — ~$1.6M
November 3, 2025 Tan Irving Chief Executive Officer 6 reported sale rows 20000 — ~$3.0M
September 4, 2025 Gubbi Vidyadhara K Chief of Global Operations S -11343 90.2902 ~$1.0M
August 28, 2025 Zamiska Gene M. SVP & Princ. Acctg Officer S -353 80.9 ~$29K
August 26, 2025 Zamiska Gene M. SVP & Princ. Acctg Officer S -814 79.1 ~$64K
August 22, 2025 Zamiska Gene M. SVP, Global Accounting & Chief S -1828 74.78 ~$0.1M
August 22, 2025 Tregillis Cynthia L Chief Legal Officer & Corp Sec S -14067 74.78 ~$1.1M
August 21, 2025 Zamiska Gene M. SVP, Global Accounting & Chief S -3160 75.68 ~$0.2M
August 19, 2025 Tan Irving Chief Executive Officer S -8621 75.9 ~$0.7M
August 13, 2025 Gubbi Vidyadhara K Chief of Global Ops S -5597 76.26 ~$0.4M
August 11, 2025 Gubbi Vidyadhara K Chief of Global Ops S -3947 74.875 ~$0.3M
June 17, 2025 Zamiska Gene M. SVP & Princ. Acctg Officer S -245 58.01 ~$14K
June 5, 2025 Zamiska Gene M. SVP & Princ. Acctg Officer S -1729 54.88 ~$95K
May 13, 2025 Tan Irving Chief Executive Officer S -11379 48.19 ~$0.5M
March 12, 2025 Zamiska Gene M. SVP & Princ. Acctg Officer S -456 43.37 ~$20K
March 7, 2025 Zamiska Gene M. SVP & Princ. Acctg Officer S -1659 41.36 ~$69K
November 29, 2024 Zamiska Gene M. SVP & Princ. Acctg Officer S -313 72.63 ~$23K
November 26, 2024 Zamiska Gene M. SVP & Princ. Acctg Officer S -658 69.99 ~$46K
November 21, 2024 Zamiska Gene M. SVP & Princ. Acctg Officer S -376 64.47 ~$24K
October 29, 2024 SODERBERY ROBERT EVP & GM, Flash Business S -30767 68.0118 ~$2.1M
October 28, 2024 Zamiska Gene M. SVP & Princ. Acctg Officer S -1993 69.94 ~$0.1M
October 25, 2024 Goeckeler David Chief Executive Officer S -75000 72.585 ~$5.4M
September 26, 2024 Goeckeler David Chief Executive Officer S -75000 70.32 ~$5.3M