WDCNasdaq · Computer Storage Devices

WESTERN DIGITAL CORP

Alert me on WDC

Insider buys, 6 months

Congress trades, 6 months

Signals, 6 months

Six months

After each filing

Oct 23 Sale Tregillis Cynthia L Insider

1 week

Result in5 trading days

1 month

Result in21 trading days

3 months

Result in63 trading days

6 months

Result in126 trading days

Oct 12 Sale Rep. Gilbert Cisneros House

1 week

−4.3%S&P −1.2%

1 month

Result in13 trading days

3 months

Result in55 trading days

6 months

Result in118 trading days

Sep 9 Sale Tregillis Cynthia L Insider

1 week

−13.5%S&P −1.1%

1 month

−18.4%S&P +1.8%

3 months

Result in31 trading days

6 months

Result in94 trading days

Sep 9 Sale Gubbi Vidyadhara K Insider

1 week

−13.5%S&P −1.1%

1 month

−18.4%S&P +1.8%

3 months

Result in31 trading days

6 months

Result in94 trading days

Sep 4 Buy Rep. Gilbert Cisneros House

1 week

−13.7%S&P −1.1%

1 month

−15.1%S&P +1.7%

3 months

Result in30 trading days

6 months

Result in93 trading days

Show all 48

Sep 3 Sale STREETER STEPHANIE A Insider

1 week

+1.3%S&P −1.1%

1 month

0.0%S&P +0.5%

3 months

Result in28 trading days

6 months

Result in91 trading days

Aug 28 Sale Tregillis Cynthia L Insider

1 week

+1.7%S&P +0.1%

1 month

−1.3%S&P −0.4%

3 months

Result in24 trading days

6 months

Result in87 trading days

Aug 25 Sale Tregillis Cynthia L Insider

1 week

−0.1%S&P −0.5%

1 month

−0.1%S&P +0.4%

3 months

Result in21 trading days

6 months

Result in84 trading days

Aug 13 Sale Tan Irving Insider

1 week

−3.7%S&P −2.0%

1 month

−12.4%S&P −2.2%

3 months

Result in13 trading days

6 months

Result in76 trading days

Jul 30 Sale Cole Martin I Insider

1 week

−15.3%S&P +3.6%

1 month

−13.8%S&P +3.7%

3 months

Result in3 trading days

6 months

Result in66 trading days

Jul 30 Sale Cole Martin I Insider

1 week

−15.3%S&P +3.6%

1 month

−13.8%S&P +3.7%

3 months

Result in3 trading days

6 months

Result in66 trading days

Jul 22 Sale Tregillis Cynthia L Insider

1 week

−17.0%S&P −2.4%

1 month

−15.7%S&P +2.0%

3 months

−34.5%S&P +3.2%

6 months

Result in60 trading days

Jul 21 Buy Sen. Alan Armstrong Senate

1 week

−17.0%S&P −2.4%

1 month

−15.7%S&P +2.0%

3 months

−34.5%S&P +3.2%

6 months

Result in60 trading days

Jun 12 Sale Cole Martin I Insider

1 week

+30.1%S&P +0.6%

1 month

−8.7%S&P +2.0%

3 months

−24.1%S&P +2.8%

6 months

Result in34 trading days

Jun 12 Sale Cole Martin I Insider

1 week

+30.1%S&P +0.6%

1 month

−8.7%S&P +2.0%

3 months

−24.1%S&P +2.8%

6 months

Result in34 trading days

Jun 6 Sale Tregillis Cynthia L Insider

1 week

+24.0%S&P +2.1%

1 month

+9.7%S&P +1.9%

3 months

−9.4%S&P +3.9%

6 months

Result in30 trading days

Jun 3 Sale Gubbi Vidyadhara K Insider

1 week

−17.5%S&P −3.8%

1 month

−2.8%S&P −0.1%

3 months

−24.4%S&P +1.7%

6 months

Result in27 trading days

May 30 Sale KIDDOO BRUCE E Insider

1 week

−3.5%S&P −2.5%

1 month

+9.6%S&P −1.4%

3 months

−17.5%S&P +1.4%

6 months

Result in25 trading days

May 28 Sale Tregillis Cynthia L Insider

1 week

+8.3%S&P +0.3%

1 month

+22.8%S&P −1.6%

3 months

−13.0%S&P +2.4%

6 months

Result in23 trading days

May 23 Sale Tregillis Cynthia L Insider

1 week

+7.3%S&P +1.2%

1 month

+28.8%S&P −1.9%

3 months

−14.1%S&P +2.3%

6 months

Result in21 trading days

May 13 Sale Davis Brian Scott Insider

1 week

−7.0%S&P −0.1%

1 month

+14.0%S&P −0.1%

3 months

−1.3%S&P +5.1%

6 months

Result in13 trading days

May 6 Sale Tan Irving Insider

1 week

+2.3%S&P +1.2%

1 month

+5.9%S&P +0.5%

3 months

−6.5%S&P +5.0%

6 months

Result in8 trading days

May 6 Sale Gubbi Vidyadhara K Insider

1 week

+2.3%S&P +1.2%

1 month

+5.9%S&P +0.5%

3 months

−6.5%S&P +5.0%

6 months

Result in8 trading days

Apr 23 Sale Tregillis Cynthia L Insider

1 week

+7.8%S&P +1.4%

1 month

+20.1%S&P +5.2%

3 months

+29.0%S&P +4.6%

6 months

−12.1%S&P +8.4%

Mar 11 Sale Gubbi Vidyadhara K Insider

1 week

+13.4%S&P −2.2%

1 month

+27.8%S&P +0.7%

3 months

+82.4%S&P +7.6%

6 months

+71.6%S&P +12.6%

Mar 6 Sale Tregillis Cynthia L Insider

1 week

+11.0%S&P −1.5%

1 month

+27.2%S&P −1.7%

3 months

+108.7%S&P +10.0%

6 months

+90.7%S&P +15.2%

Mar 6 Sale Gubbi Vidyadhara K Insider

1 week

+11.0%S&P −1.5%

1 month

+27.2%S&P −1.7%

3 months

+108.7%S&P +10.0%

6 months

+90.7%S&P +15.2%

Mar 4 Sale Cole Martin I Insider

1 week

+2.9%S&P −1.3%

1 month

+12.9%S&P −4.0%

3 months

+127.5%S&P +10.4%

6 months

+71.9%S&P +12.3%

Feb 28 Sale Tregillis Cynthia L Insider

1 week

−2.9%S&P −1.2%

1 month

+0.2%S&P −5.0%

3 months

+102.3%S&P +10.8%

6 months

+67.0%S&P +12.3%

Feb 25 Sale Tregillis Cynthia L Insider

1 week

−10.2%S&P −1.2%

1 month

−6.0%S&P −6.7%

3 months

+82.5%S&P +8.6%

6 months

+61.3%S&P +11.1%

Feb 20 Sale Davis Brian Scott Insider

1 week

−2.0%S&P −0.5%

1 month

+3.3%S&P −4.7%

3 months

+70.5%S&P +8.0%

6 months

+61.0%S&P +11.7%

Feb 7 Sale MASSENGILL MATTHEW E Insider

1 week

−0.7%S&P −1.6%

1 month

−6.0%S&P −2.5%

3 months

+80.5%S&P +6.8%

6 months

+53.2%S&P +11.6%

Feb 7 Sale Tregillis Cynthia L Insider

1 week

−0.7%S&P −1.6%

1 month

−6.0%S&P −2.5%

3 months

+80.5%S&P +6.8%

6 months

+53.2%S&P +11.6%

Feb 5 Sale Tan Irving Insider

1 week

+9.2%S&P +0.5%

1 month

+0.8%S&P +0.1%

3 months

+78.4%S&P +8.3%

6 months

+67.0%S&P +14.7%

Jan 22 Sale Tregillis Cynthia L Insider

1 week

+14.4%S&P +0.7%

1 month

+15.3%S&P −1.0%

3 months

+65.8%S&P +3.1%

6 months

+113.8%S&P +7.8%

Dec 9, 2025 Sale Gubbi Vidyadhara K Insider

1 week

+3.0%S&P −0.6%

1 month

+18.2%S&P +1.9%

3 months

+54.1%S&P −2.2%

6 months

+212.4%S&P +8.6%

Dec 9, 2025 Sale Alexy Kimberly Insider

1 week

+3.0%S&P −0.6%

1 month

+18.2%S&P +1.9%

3 months

+54.1%S&P −2.2%

6 months

+212.4%S&P +8.6%

Dec 4, 2025 Sale Cole Martin I Insider

1 week

+16.3%S&P +0.7%

1 month

+36.3%S&P +1.4%

3 months

+62.8%S&P −0.6%

6 months

+227.5%S&P +8.6%

Dec 4, 2025 Sale Tregillis Cynthia L Insider

1 week

+16.3%S&P +0.7%

1 month

+36.3%S&P +1.4%

3 months

+62.8%S&P −0.6%

6 months

+227.5%S&P +8.6%

Nov 27, 2025 Sale Alexy Kimberly Insider

1 week

+3.5%S&P +0.3%

1 month

+7.9%S&P +0.8%

3 months

+53.6%S&P −0.2%

6 months

+245.2%S&P +11.8%

Nov 27, 2025 Sale Oulman Roxanne Insider

1 week

+3.5%S&P +0.3%

1 month

+7.9%S&P +0.8%

3 months

+53.6%S&P −0.2%

6 months

+245.2%S&P +11.8%

Nov 7, 2025 Sale Cole Martin I Insider

1 week

−3.1%S&P +0.1%

1 month

+4.1%S&P +1.8%

3 months

+61.2%S&P +3.5%

6 months

+200.3%S&P +10.6%

Nov 6, 2025 Sale Tan Irving Insider

1 week

−3.9%S&P +0.3%

1 month

+3.9%S&P +2.0%

3 months

+74.9%S&P +3.8%

6 months

+215.7%S&P +10.9%

Sep 6, 2025 Sale Gubbi Vidyadhara K Insider

1 week

+9.8%S&P +1.9%

1 month

+28.6%S&P +3.4%

3 months

+81.2%S&P +6.0%

6 months

+185.7%S&P +5.0%

Jun 22, 2025 Sale Rep. Jefferson Shreve House

1 week

+6.0%S&P +2.9%

1 month

+14.8%S&P +5.7%

3 months

+86.4%S&P +11.4%

6 months

+200.5%S&P +14.0%

May 8, 2025 Buy Rep. Jefferson Shreve House

1 week

+13.4%S&P +5.3%

1 month

+27.1%S&P +6.9%

3 months

+69.6%S&P +13.0%

6 months

+270.6%S&P +19.6%

May 8, 2025 Sale Rep. Rob Bresnahan House

1 week

+13.4%S&P +5.3%

1 month

+27.1%S&P +6.9%

3 months

+69.6%S&P +13.0%

6 months

+270.6%S&P +19.6%

Apr 11, 2025 Sale Rep. Jefferson Shreve House

1 week

+2.4%S&P −2.2%

1 month

+37.4%S&P +9.0%

3 months

+86.1%S&P +16.1%

6 months

+216.8%S&P +23.5%

Every purchase and sale on this ticker reported by a member of Congress or an insider, measured from the close of the first trading day after it became public to the close 1 week, 1 month, 3 months and 6 months later, each beside the S&P over the same days.

Filings for WDC

227 held · newest 5227 held · newest 2

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Signal history

No signal for this ticker yet. A signal is written when insider buying here scores one dot or more.

Stakes

Jun 30, 2026 Schedule 13G, amended

FMR LLC: 7.2%, 26,361,315 shares

Jun 30, 2026 Schedule 13G, amended

Vanguard Portfolio Management: 3.6%, 13,196,274 shares

Mar 31, 2026 Schedule 13G

Vanguard Capital Management: 7.5%, 25,402,917 shares

Mar 31, 2026 Schedule 13G

Vanguard Portfolio Management: 5.1%, 17,217,120 shares

Mar 13, 2026 Schedule 13G, amended

The Vanguard Group: 0%, 0 shares

Dec 31, 2025 Schedule 13G, amended

MANAGED ACCOUNT ADVISORS LLC: 2.6%, 9,026,563 shares

Dec 31, 2025 Schedule 13G, amended

FMR LLC: 10.1%, 34,466,664 shares

Sep 30, 2025 Schedule 13G, amended

MANAGED ACCOUNT ADVISORS LLC: 5.3%, 18,350,274 shares

Sep 30, 2025 Schedule 13G, amended

FMR LLC: 7%, 24,405,724 shares

Schedule 13D is filed within 5 business days of crossing 5 percent by an investor who may seek to influence the company. Schedule 13G is filed by a passive holder, and a large institution has up to 45 days after the quarter end.

Government contracts, last 12 months

Awards of $10M and up, from USAspending · context, not a signal

No contracts of $10M or more in the last 12 months.

Lobbying

Last four quarters

$140KQ4 2025

$300KQ1 2026

$290KQ2 2026

$310KQ3 2026

Up 7 percent from Q2 2026. Reported by the company to the Senate each quarter.Original report ↗

Read from LDA.gov between Sep 23, 2026 and Oct 21, 2026. Senate Office of Public Records cannot vouch for the data or analyses derived from these data after the data have been retrieved from LDA.gov.