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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 (2026-08) is the 11th percentile of this ticker's monthly net P/S flow over 23 complete months (limited history). Lower percentiles are more selling; higher are more buying.

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