Western Digital Corporation Insider Trading

WDC

Last 12 months

Insiders sold $73.8M and bought nothing on the open market.

74% of the selling was scheduled in advance under 10b5-1 plans. Chief of Global Operations Vidyadhara K Gubbi sold $3.72M on Dec 5, 2025, 15% of their stake, outside a plan. The last open-market buy by an executive or director was in May 2016.

Net open-market

−$73.8M

0 buys · 40 sales

Under a 10b5-1 plan

74%

of the value sold

Insiders who bought / sold

0 / 10

executives and directors

Last open-market buy

May 2016

May 31, 2016

Get an email when WDC's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 29	Martin I Cole Director	Sold10b5-1 plan 12 parts	4,000	$395.47 average	$1.58M	19%	Form 4
Oct 21	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	807	$380.00	307K	0.7%	Form 4
Sep 4	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	432	$451.20	195K	0.4%	Form 4
Sep 4	Vidyadhara K Gubbi Chief of Global Operations	SoldNo plan	1,795	$459.87	825K	2.2%	Form 4
Aug 31 – Sep 1	Stephanie A Streeter Director	SoldNo plan 3 parts	5,600	$449.87 average	$2.52M	13%	Form 4
Aug 26 – 27	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan 2 parts	1,483	$469.51 average	696K	1.3%	Form 4
Aug 21 – 24	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan 2 parts	919	$454.12 average	417K	0.8%	Form 4
Aug 11	Irving Tan Chief Executive Officer	Sold10b5-1 plan 7 parts	20,000	$444.97 average	$8.9M	3.4%	Form 4
Jul 28	Martin I Cole Director	Sold10b5-1 plan 2 parts	192	$462.77 average	89K	0.9%	Form 4
Jul 28	Martin I Cole Director	Sold10b5-1 plan 30 parts	3,808	$448.66 average	$1.71M	15%	Form 4
Jul 21	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	808	$529.63	428K	0.7%	Form 4
Jun 9	Martin I Cole Director	Sold10b5-1 plan 14 parts	720	$536.01 average	386K	2.8%	Form 4
Jun 9	Martin I Cole Director	Sold10b5-1 plan 30 parts	3,280	$511.16 average	$1.68M	11%	Form 4
Jun 5	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	432	$545.60	236K	0.4%	Form 4
Jun 1	Vidyadhara K Gubbi Chief of Global Operations	SoldNo plan	2,475	$556.24	$1.38M	2.8%	Form 4
May 28	Bruce E Kiddoo Director	SoldNo plan	750	$528.52	396K	16%	Form 4
May 22 – 27	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan 2 parts	522	$509.53 average	266K	0.4%	Form 4
May 21	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	106	$458.87	49K	<0.1%	Form 4
May 11	Brian Scott Davis Chief Sales & Mrktng Officer	Sold10b5-1 plan 18 parts	10,000	$500.69 average	$5.01M	8.7%	Form 4
May 4	Vidyadhara K Gubbi Chief of Global Operations	SoldNo plan	4,674	$443.19	$2.07M	4.9%	Form 4
May 1	Irving Tan Chief Executive Officer	Sold10b5-1 plan 9 parts	20,000	$411.84 average	$8.24M	3.2%	Form 4
Apr 21	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	363	$377.09	137K	0.3%	Form 4
Mar 6	Vidyadhara K Gubbi Chief of Global Operations	SoldNo plan	8,518	$255.33	$2.17M	7.9%	Form 4
Mar 4	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan 2 parts	9,324	$268.28 average	$2.5M	7.1%	Form 4
Mar 4	Vidyadhara K Gubbi Chief of Global Operations	SoldNo plan 2 parts	10,148	$270.31 average	$2.74M	8.6%	Form 4
Mar 2	Martin I Cole Director	Sold10b5-1 plan 14 parts	6,000	$271.67 average	$1.63M	17%	Form 4
Feb 26	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	214	$286.11	61K	0.2%	Form 4
Feb 23 – 24	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan 2 parts	438	$282.33 average	124K	0.3%	Form 4
Feb 17	Brian Scott Davis Chief Sales & Mrktng Officer	Sold10b5-1 plan 12 parts	10,000	$279.16 average	$2.79M	7.6%	Form 4
Feb 6	Cynthia L Tregillis Chief Legal Officer & Corp Sec	SoldNo plan	6,780	$270.49	$1.83M	4.7%	Form 4
Feb 5	Matthew E Massengill Director	Sold10b5-1 plan 11 parts	36,926	$260.43 average	$9.62M	56%	Form 4
Feb 2	Irving Tan Chief Executive Officer	Sold10b5-1 plan 17 parts	20,000	$255.44 average	$5.11M	3.1%	Form 4
Jan 21	Cynthia L Tregillis Chief Legal Officer & Corp Sec	Sold10b5-1 plan	447	$229.00	102K	0.3%	Form 4
Dec 4, 2025 – Dec 5, 2025	Vidyadhara K Gubbi Chief of Global Operations	SoldNo plan 3 parts	22,820	$163.15 average	$3.72M	15%	Form 4
Dec 4, 2025	Kimberly Alexy Director	SoldNo plan	2,000	$160.08	320K	6.8%	Form 4
Dec 2, 2025	Cynthia L Tregillis Chief Legal Officer & Corp Sec	SoldNo plan	2,801	$160.57	450K	1.9%	Form 4
Dec 1, 2025	Martin I Cole Director	Sold10b5-1 plan 8 parts	6,000	$162.61 average	976K	14%	Form 4
Nov 25, 2025	Roxanne Oulman Director	SoldNo plan	1,800	$154.42	278K	32%	Form 4
Nov 25, 2025	Kimberly Alexy Director	SoldNo plan	1,768	$154.00	272K	5.7%	Form 4
Nov 5, 2025	Martin I Cole Director	Sold10b5-1 plan 11 parts	10,000	$161.32 average	$1.61M	20%	Form 4

Oct 2910b5-1 plan
Martin I Cole
Director · sold 4,000 at avg $395.47
$1.58M
19% of stake
Oct 2110b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 807 at $380.00
307K
0.7% of stake
Sep 410b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 432 at $451.20
195K
0.4% of stake
Sep 4No plan
Vidyadhara K Gubbi
Chief of Global Operations · sold 1,795 at $459.87
825K
2.2% of stake
Aug 31 – Sep 1No plan
Stephanie A Streeter
Director · sold 5,600 at avg $449.87
$2.52M
13% of stake
Aug 26 – 2710b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 1,483 at avg $469.51
696K
1.3% of stake
Aug 21 – 2410b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 919 at avg $454.12
417K
0.8% of stake
Aug 1110b5-1 plan
Irving Tan
Chief Executive Officer · sold 20,000 at avg $444.97
$8.9M
3.4% of stake
Jul 2810b5-1 plan
Martin I Cole
Director · sold 192 at avg $462.77
89K
0.9% of stake
Jul 2810b5-1 plan
Martin I Cole
Director · sold 3,808 at avg $448.66
$1.71M
15% of stake
Jul 2110b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 808 at $529.63
428K
0.7% of stake
Jun 910b5-1 plan
Martin I Cole
Director · sold 720 at avg $536.01
386K
2.8% of stake
Jun 910b5-1 plan
Martin I Cole
Director · sold 3,280 at avg $511.16
$1.68M
11% of stake
Jun 510b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 432 at $545.60
236K
0.4% of stake
Jun 1No plan
Vidyadhara K Gubbi
Chief of Global Operations · sold 2,475 at $556.24
$1.38M
2.8% of stake
May 28No plan
Bruce E Kiddoo
Director · sold 750 at $528.52
396K
16% of stake
May 22 – 2710b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 522 at avg $509.53
266K
0.4% of stake
May 2110b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 106 at $458.87
49K
<0.1% of stake
May 1110b5-1 plan
Brian Scott Davis
Chief Sales & Mrktng Officer · sold 10,000 at avg $500.69
$5.01M
8.7% of stake
May 4No plan
Vidyadhara K Gubbi
Chief of Global Operations · sold 4,674 at $443.19
$2.07M
4.9% of stake
May 110b5-1 plan
Irving Tan
Chief Executive Officer · sold 20,000 at avg $411.84
$8.24M
3.2% of stake
Apr 2110b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 363 at $377.09
137K
0.3% of stake
Mar 6No plan
Vidyadhara K Gubbi
Chief of Global Operations · sold 8,518 at $255.33
$2.17M
7.9% of stake
Mar 410b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 9,324 at avg $268.28
$2.5M
7.1% of stake
Mar 4No plan
Vidyadhara K Gubbi
Chief of Global Operations · sold 10,148 at avg $270.31
$2.74M
8.6% of stake
Mar 210b5-1 plan
Martin I Cole
Director · sold 6,000 at avg $271.67
$1.63M
17% of stake
Feb 2610b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 214 at $286.11
61K
0.2% of stake
Feb 23 – 2410b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 438 at avg $282.33
124K
0.3% of stake
Feb 1710b5-1 plan
Brian Scott Davis
Chief Sales & Mrktng Officer · sold 10,000 at avg $279.16
$2.79M
7.6% of stake
Feb 6No plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 6,780 at $270.49
$1.83M
4.7% of stake
Feb 510b5-1 plan
Matthew E Massengill
Director · sold 36,926 at avg $260.43
$9.62M
56% of stake
Feb 210b5-1 plan
Irving Tan
Chief Executive Officer · sold 20,000 at avg $255.44
$5.11M
3.1% of stake
Jan 2110b5-1 plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 447 at $229.00
102K
0.3% of stake
Dec 4, 2025 – Dec 5, 2025No plan
Vidyadhara K Gubbi
Chief of Global Operations · sold 22,820 at avg $163.15
$3.72M
15% of stake
Dec 4, 2025No plan
Kimberly Alexy
Director · sold 2,000 at $160.08
320K
6.8% of stake
Dec 2, 2025No plan
Cynthia L Tregillis
Chief Legal Officer & Corp Sec · sold 2,801 at $160.57
450K
1.9% of stake
Dec 1, 202510b5-1 plan
Martin I Cole
Director · sold 6,000 at avg $162.61
976K
14% of stake
Nov 25, 2025No plan
Roxanne Oulman
Director · sold 1,800 at $154.42
278K
32% of stake
Nov 25, 2025No plan
Kimberly Alexy
Director · sold 1,768 at $154.00
272K
5.7% of stake
Nov 5, 202510b5-1 plan
Martin I Cole
Director · sold 10,000 at avg $161.32
$1.61M
20% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch WDC, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

WDC is in 427 US ETFs. The largest of them, with WDC's weight in each:

Spot a number that looks wrong? Check it in WDC's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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