Matthew E Massengill

CIK 1232826 · View on SEC EDGAR ↗

Insider

First SEC filing: June 22, 2026 · Latest: June 22, 2026

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Insider at

Insider transactions

0 buys (P) 11 sells (S) Net: $-9,616,470 + 77 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

77 other filings hidden
Date Ticker Code Shares Price Value Owned after Δ own A/D vs now
Feb. 5, 2026 WDC S 10b5-1 2,600 $256.63 $667,238 34,326 Indirect -7.04% Disposed 85.6% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 4,411 $257.69 $1,136,671 29,915 Indirect -12.85% Disposed 84.8% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 7,000 $258.67 $1,810,690 22,915 Indirect -23.40% Disposed 84.1% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 4,915 $259.59 $1,275,885 18,000 Indirect -21.45% Disposed 83.5% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 5,987 $260.57 $1,560,033 12,013 Indirect -33.26% Disposed 82.8% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 3,597 $261.71 $941,371 8,416 Indirect -29.94% Disposed 82.0% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 2,300 $262.77 $604,371 6,116 Indirect -27.33% Disposed 81.2% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 2,600 $264.01 $686,426 3,516 Indirect -42.51% Disposed 80.4% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 2,200 $264.99 $582,978 1,316 Indirect -62.57% Disposed 79.7% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 916 $265.92 $243,583 400 Indirect -69.60% Disposed 79.1% (price as of 2026-08-19)
Feb. 5, 2026 WDC S 10b5-1 400 $268.06 $107,224 0 Indirect -100.00% Disposed 77.7% (price as of 2026-08-19)
Nov. 8, 2019 WDC S 10b5-1 2,867 $52.12 $149,428 19,520 Direct -12.81% Disposed 1109.0% (price as of 2026-08-19)
Nov. 8, 2019 WDC S 10b5-1 243 $52.73 $12,813 19,277 Direct -1.24% Disposed 1095.0% (price as of 2026-08-19)
Nov. 5, 2018 WDC S 10b5-1 1,681 $47.68 $80,150 16,167 Direct -9.42% Disposed 1221.5% (price as of 2026-08-19)
Nov. 8, 2017 WDC S 10b5-1 2,677 $86.53 $231,641 17,759 Direct -13.10% Disposed 628.2% (price as of 2026-08-19)
Nov. 7, 2016 WDC S 10b5-1 1,487 $57.11 $84,923 15,579 Direct -8.71% Disposed 1003.3% (price as of 2026-08-19)
Nov. 7, 2016 WDC S 10b5-1 700 $57.74 $40,418 14,879 Direct -4.49% Disposed 991.3% (price as of 2026-08-19)
Nov. 6, 2015 WDC S 10b5-1 1,187 $67.75 $80,419 11,897 Direct -9.07% Disposed 830.0% (price as of 2026-08-19)
Feb. 12, 2015 WDC S 5,733 $107.21 $614,635 9,025 Direct -38.85% Disposed 487.7% (price as of 2026-08-19)
Feb. 12, 2015 WDC S 3,507 $107.36 $376,512 500 Indirect -87.52% Disposed 486.9% (price as of 2026-08-19)
Nov. 11, 2014 WDC S 10b5-1 2,639 $97.18 $256,458 9,025 Direct -22.63% Disposed 548.4% (price as of 2026-08-19)
Nov. 5, 2014 WDC S 10b5-1 1,575 $100.62 $158,476 11,464 Direct -12.08% Disposed 526.2% (price as of 2026-08-19)
Nov. 15, 2013 WDC S 33,953 $74.52 $2,530,178 10,772 Direct -75.92% Disposed 745.6% (price as of 2026-08-19)

Showing latest 100 of 434 transactions

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
June 17, 2026 WDC Dividend Equivalent Rights Common Stock (6) — — 6 Acquired
March 18, 2026 WDC Dividend Equivalent Rights Common Stock (12) — — 12 Acquired
Dec. 18, 2025 WDC Dividend Equivalent Rights Common Stock (21) — — 21 Acquired
Sept. 18, 2025 WDC Dividend Equivalent Rights Common Stock (26) — — 26 Acquired
June 18, 2025 WDC Dividend Equivalent Rights Common Stock (46) — — 46 Acquired
Nov. 14, 2020 WDC Dividend Equivalent Rights Common Stock (110) — — 110 Disposed
April 17, 2020 WDC Dividend Equivalent Rights Common Stock (68) — — 68 Acquired
Jan. 21, 2020 WDC Dividend Equivalent Rights Common Stock (42) — — 42 Acquired
Nov. 7, 2019 WDC Dividend Equivalent Rights Common Stock (245) — — 245 Disposed
Oct. 22, 2019 WDC Dividend Equivalent Rights Common Stock (52) — — 52 Acquired
July 15, 2019 WDC Dividend Equivalent Rights Common Stock (56) — — 56 Acquired
April 15, 2019 WDC Dividend Equivalent Rights Common Stock (58) — — 58 Acquired
Jan. 14, 2019 WDC Dividend Equivalent Rights Common Stock (78) — — 78 Acquired
Nov. 2, 2018 WDC Dividend Equivalent Rights Common Stock (89) — — 89 Disposed
Oct. 15, 2018 WDC Dividend Equivalent Rights Common Stock (31) — — 31 Acquired
July 16, 2018 WDC Dividend Equivalent Rights Common Stock (21) — — 21 Acquired
April 16, 2018 WDC Dividend Equivalent Rights Common Stock (18) — — 18 Acquired
Jan. 16, 2018 WDC Dividend Equivalent Rights Common Stock (20) — — 20 Acquired
Nov. 1, 2017 WDC Dividend Equivalent Rights Common Stock (121) — — 121 Disposed
Oct. 30, 2017 WDC Non-Qualified Stock Option (right to buy) Common Stock (2,164) $25.79 Nov. 10, 2018 2,164 Disposed
Oct. 16, 2017 WDC Dividend Equivalent Rights Common Stock (29) — — 29 Acquired
July 17, 2017 WDC Dividend Equivalent Rights Common Stock (27) — — 27 Acquired
April 17, 2017 WDC Dividend Equivalent Rights Common Stock (30) — — 30 Acquired
Jan. 17, 2017 WDC Dividend Equivalent Rights Common Stock (35) — — 35 Acquired
Nov. 3, 2016 WDC Dividend Equivalent Rights Common Stock (171) — — 171 Disposed
Oct. 17, 2016 WDC Dividend Equivalent Rights Common Stock (39) — — 39 Acquired
July 15, 2016 WDC Dividend Equivalent Rights Common Stock (40) — — 40 Acquired
April 15, 2016 WDC Dividend Equivalent Rights Common Stock (50) — — 50 Acquired
Jan. 15, 2016 WDC Dividend Equivalent Rights Common Stock (42) — — 42 Acquired
Nov. 3, 2015 WDC Dividend Equivalent Rights Common Stock (48) — — 48 Disposed
Oct. 15, 2015 WDC Dividend Equivalent Rights Common Stock (14) — — 14 Acquired
July 15, 2015 WDC Dividend Equivalent Rights Common Stock (14) — — 14 Acquired
April 16, 2015 WDC Dividend Equivalent Rights Common Stock (11) — — 11 Acquired
Feb. 12, 2015 WDC Non-Qualified Stock Option (right to buy) Common Stock (3,607) $25.79 Nov. 10, 2018 3,607 Disposed
Feb. 12, 2015 WDC Non-Qualified Stock Option (right to buy) Common Stock (2,126) $32.99 Nov. 11, 2017 2,126 Disposed
Jan. 15, 2015 WDC Dividend Equivalent Rights Common Stock (8) — — 8 Acquired
Nov. 10, 2014 WDC Dividend Equivalent Rights Common Stock (200) — — 200 Disposed
Nov. 4, 2014 WDC Dividend Equivalent Rights Common Stock (46) — — 46 Disposed
Oct. 15, 2014 WDC Dividend Equivalent Rights Common Stock (38) — — 38 Acquired
July 15, 2014 WDC Dividend Equivalent Rights Common Stock (32) — — 32 Acquired
April 15, 2014 WDC Dividend Equivalent Rights Common Stock (27) — — 27 Acquired
Jan. 15, 2014 WDC Dividend Equivalent Rights Common Stock (27) — — 27 Acquired
Nov. 15, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (8,000) $15.34 Nov. 6, 2015 8,000 Disposed
Nov. 15, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (2,164) $25.79 Nov. 10, 2018 2,164 Disposed
Nov. 15, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (3,000) $27.64 Nov. 6, 2014 3,000 Disposed
Nov. 15, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (6,380) $32.99 Nov. 11, 2017 6,380 Disposed
Nov. 15, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (6,909) $38.53 Nov. 11, 2016 6,909 Disposed
Nov. 11, 2013 WDC Dividend Equivalent Rights Common Stock (96) — — 96 Disposed
Nov. 8, 2013 WDC Dividend Equivalent Rights Common Stock (118) — — 118 Disposed
Oct. 15, 2013 WDC Dividend Equivalent Rights Common Stock (56) — — 56 Acquired
July 15, 2013 WDC Dividend Equivalent Rights Common Stock (56) — — 56 Acquired
April 15, 2013 WDC Dividend Equivalent Rights Common Stock (74) — — 74 Acquired
March 18, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (8,743) $15.34 Nov. 6, 2015 8,743 Disposed
March 18, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (9,185) $19.09 Feb. 6, 2017 9,185 Disposed
March 18, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (3,607) $25.79 Nov. 10, 2018 3,607 Disposed
March 18, 2013 WDC Non-Qualified Stock Option (right to buy) Common Stock (4,364) $27.64 Nov. 6, 2014 4,364 Disposed
Nov. 11, 2012 WDC Dividend Equivalent Rights Common Stock (23) — — 23 Disposed
Oct. 15, 2012 WDC Dividend Equivalent Rights Common Stock (83) — — 83 Acquired
Nov. 10, 2011 WDC Non-Qualified Stock Option (right to buy) Common Stock (11,542) $25.79 Nov. 10, 2018 11,542 Acquired
Nov. 11, 2010 WDC Non-Qualified Stock Option (right to buy) Common Stock (8,506) $32.99 Nov. 11, 2017 8,506 Acquired
Nov. 11, 2009 WDC Non-Qualified Stock Option (right to buy) Common Stock (6,909) $38.53 Nov. 11, 2016 6,909 Acquired
Nov. 4, 2009 WDC Employee Stock Option (right to buy) Common Stock (10,000) $10.21 Jan. 20, 2015 10,000 Disposed
Nov. 4, 2009 WDC Employee Stock Option (right to buy) Common Stock (7,500) $13.07 Sept. 24, 2013 7,500 Disposed
Nov. 6, 2008 WDC Non-Qualified Stock Option (right to buy) Common Stock (16,743) $15.34 Nov. 6, 2015 16,743 Acquired
Feb. 21, 2008 WDC Employee Stock Option (right to buy) Common Stock (100) $11.69 Aug. 11, 2008 100 Disposed
Feb. 21, 2008 WDC Employee Stock Option (right to buy) Common Stock (30,450) $18.62 Feb. 23, 2008 30,450 Disposed
Nov. 7, 2007 WDC Employee Stock Option (right to buy) Common Stock (19,400) $11.69 July 1, 2008 19,400 Disposed
Nov. 7, 2007 WDC Employee Stock Option (right to buy) Common Stock (19,900) $11.69 Aug. 11, 2008 19,900 Disposed
Nov. 7, 2007 WDC Employee Stock Option (right to buy) Common Stock (6,150) $13.07 Sept. 24, 2013 6,150 Disposed
Nov. 7, 2007 WDC Employee Stock Option (right to buy) Common Stock (29,550) $18.62 Feb. 23, 2008 29,550 Disposed
Nov. 6, 2007 WDC Employee Stock Option (right to buy) Common Stock (164,100) $13.07 Sept. 24, 2013 164,100 Disposed
Nov. 6, 2007 WDC Non-Qualified Stock Option (right to buy) Common Stock (7,364) $27.64 Nov. 6, 2014 7,364 Acquired
Nov. 5, 2007 WDC Employee Stock Option (right to buy) Common Stock (181,500) $10.21 Jan. 20, 2015 181,500 Disposed
Nov. 5, 2007 WDC Employee Stock Option (right to buy) Common Stock (103,500) $13.07 Sept. 24, 2013 103,500 Disposed
Feb. 6, 2007 WDC Non-Qualified Stock Option (right to buy) Common Stock (9,185) $19.09 Feb. 6, 2017 9,185 Acquired
June 21, 2006 WDC Employee Stock Option (right to buy) Common Stock (4,500) $11.88 July 24, 2006 4,500 Disposed
Jan. 31, 2006 WDC Employee Stock Option (right to buy) Common Stock (121,000) $10.21 Jan. 20, 2015 121,000 Disposed
Jan. 31, 2006 WDC Employee Stock Option (right to buy) Common Stock (85,400) $10.25 Sept. 9, 2008 85,400 Disposed
Jan. 31, 2006 WDC Employee Stock Option (right to buy) Common Stock (10,000) $10.25 Sept. 9, 2008 10,000 Disposed
Jan. 31, 2006 WDC Employee Stock Option (right to buy) Common Stock (11,500) $11.88 July 24, 2006 11,500 Disposed
Jan. 31, 2006 WDC Employee Stock Option (right to buy) Common Stock (6,784) $12.25 Aug. 6, 2008 6,784 Disposed
Jan. 31, 2006 WDC Employee Stock Option (right to buy) Common Stock (40,000) $12.88 Nov. 17, 2008 40,000 Disposed
Dec. 22, 2005 WDC Employee Stock Option (right to buy) Common Stock (100,000) $6.50 June 17, 2009 100,000 Disposed
Dec. 22, 2005 WDC Employee Stock Option (right to buy) Common Stock (150,000) $6.95 Jan. 17, 2012 150,000 Disposed
Nov. 30, 2005 WDC Employee Stock Option (right to buy) Common Stock (100,000) $3.85 Sept. 23, 2012 100,000 Disposed
Nov. 30, 2005 WDC Employee Stock Option (right to buy) Common Stock (173,521) $6.00 Oct. 27, 2010 173,521 Disposed
Aug. 25, 2005 WDC Employee Stock Option (right to buy) Common Stock (187,500) $10.21 Jan. 20, 2015 187,500 Disposed
Aug. 25, 2005 WDC Employee Stock Option (right to buy) Common Stock (18,750) $13.07 Sept. 24, 2013 18,750 Disposed
July 1, 2005 WDC Phantom Stock Common Stock (630,000) — July 1, 2005 630,000 Disposed
June 21, 2005 WDC Employee Stock Option (right to buy) Common Stock (7,200) $8.81 July 20, 2005 7,200 Disposed
March 2, 2005 WDC Employee Stock Option (right to buy) Common Stock (200,000) $6.00 Oct. 27, 2010 200,000 Disposed
Jan. 20, 2005 WDC Employee Stock Option (right to buy) Common Stock (500,000) $10.21 Jan. 20, 2015 500,000 Acquired
Dec. 15, 2004 WDC Employee Stock Option (right to buy) Common Stock (100,000) $6.00 Oct. 27, 2010 100,000 Disposed
Dec. 6, 2004 WDC Employee Stock Option (right to buy) Common Stock (18,521) $4.56 Jan. 12, 2010 18,521 Disposed
Dec. 6, 2004 WDC Employee Stock Option (right to buy) Common Stock (26,479) $6.00 Oct. 27, 2010 26,479 Disposed
Dec. 2, 2004 WDC Employee Stock Option (right to buy) Common Stock (250,000) $2.10 Sept. 26, 2011 250,000 Disposed
Dec. 2, 2004 WDC Employee Stock Option (right to buy) Common Stock (206,250) $3.85 Sept. 23, 2012 206,250 Disposed
Dec. 2, 2004 WDC Employee Stock Option (right to buy) Common Stock (225,229) $4.56 Jan. 12, 2010 225,229 Disposed
Sept. 21, 2004 WDC Non-Qualified Stock Option (right to buy) Common Stock (6,038) $3.31 Oct. 20, 2004 6,038 Disposed
Sept. 8, 2004 WDC Employee Stock Option (right to buy) Common Stock (20,800) $7.56 Sept. 8, 2004 20,800 Disposed

Showing latest 100 of 104 transactions

Exercise/conversion price is blank when not applicable (e.g. RSUs).