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Seagate Technology Holdings plc

STX
Exchange
Nasdaq
Industry
Computer Storage Devices
SEC CIK
0001137789

In the last 90 days, Seagate Technology Holdings plc insiders filed 0 open-market purchases and 34 sales; 1,973 institutions reported holding it in 13F filings for Q2 2026, worth $181.1B in total; 5 superinvestors hold it, including Lone Pine Capital and Tiger Global Management.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Seagate Technology Holdings plc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
34 filings
6 insiders, $379.1M in total
Insiders trading
6
Net value
−$379.1M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Seagate Technology Holdings plc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Seagate Technology Holdings plc
NameTitleLast reported holdingLast filingFilings, past year
Morris John ChristopherEVP & CTO22,693Sep 22, 202617
Romano GianlucaEVP & CFO70,757Sep 16, 202619
Chong Kian FattEVP Global Operations25,093Sep 16, 202612
Mosley William DCEO378,108Sep 16, 202627
Teh Ban SengEVP & Chief Commercial Officer5,810Sep 16, 202619
Conyers Yolanda LeeDirector3,351Sep 3, 20266
Lee James CIEVP & CLO347Aug 26, 202610
Arumugavelu ShankarDirector6,626Jun 4, 20264
Bhatt PratDirector12,869Jun 2, 20263
Tilenius StephanieDirector10,664May 6, 20264
Geldmacher Jay LDirector223Feb 2, 20264
Szlosek Thomas ADirector357Nov 12, 20251
Cannon Michael RDirector13,439Oct 28, 20252
Clemmer Richard LDirector29,704Oct 28, 20252
Adams MarkDirector2,046Oct 28, 20252
Haggart Dylan G.Director14,515Oct 28, 20252
Bruner JudyDirector14,314IndirectOct 21, 20251
Bruggeworth Robert ADirector6,591Oct 22, 20240
Schuelke KatherineSVP, CLO & Corporate Secretary29,063Dec 12, 20230
Zander Edward JDirector0Oct 24, 20230
Naik RaviEVP, Lyve Storage Services38,857Mar 23, 20230
Nygaard Jeffrey D.EVP, Operations and Technology30,360Feb 2, 20230
ValueAct Capital Management, L.P.Director, Other: See Remarks7,870Oct 24, 20220
ValueAct Capital Management, LLCDirector, Other: See Remarks7,870Oct 24, 20220
VA Partners I, LLCDirector, Other: See Remarks7,870Oct 24, 20220
ValueAct Holdings GP, LLCDirector, Other: See Remarks7,870Oct 24, 20220
ValueAct Holdings, L.P.Director, Other: See Remarks7,870Oct 24, 20220
ValueAct Capital Master Fund, L.P.Director, Other: See Remarks7,870Oct 24, 20220
ValueAct Holdings II, L.P.Director, Other: See Remarks7,870Oct 24, 20220
Fochtman Jeffrey D.SVP, Business & Marketing14,736Sep 14, 20220
Luczo Stephen JDirector225,941IndirectMar 8, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 22, 2026 (view filing)4:49 PM ETSep 211 dayMorris John ChristopherEVP & CTOSSale−9.35K$877.91−$8.21M−29.2%22.7K after26 lots10b5-1
Sep 16, 2026 (view filing)4:10 PM ETSep 151 dayRomano GianlucaEVP & CFOSSale−50.0K$772.16−$38.6M−41.4%70.8K after
Sep 16, 2026 (view filing)4:10 PM ETSep 151 dayMosley William DCEOSSale−97.9K$772.14−$75.6M−20.6%378.1K after
Sep 16, 2026 (view filing)4:10 PM ETSep 151 dayTeh Ban SengEVP & Chief Commercial OfficerSSale−52.7K$782.08−$41.2M−90.1%5.81K after24 lots10b5-1
Sep 16, 2026 (view filing)4:10 PM ETSep 151 dayMorris John ChristopherEVP & CTOSSale−15.5K$772.15−$11.9M−33.2%31.1K after
Sep 15, 2026 (view filing)4:16 PM ETSep 141 dayTeh Ban SengEVP & Chief Commercial OfficerSSale−989$779.00−$770.4K−14.5%5.81K after10b5-1
Sep 15, 2026 (view filing)4:15 PM ETSep 141 dayMorris John ChristopherEVP & CTOSSale−492.75$781.23−$385.0K−2.9%16.5K after
Sep 15, 2026 (view filing)4:15 PM ETSep 11-144 daysRomano GianlucaEVP & CFOSSale−5.55K$841.95−$4.68M−15.5%30.4K after15 lots10b5-1
Sep 15, 2026 (view filing)4:15 PM ETSep 114 daysRomano GianlucaEVP & CFOSSale−45.9K$830.01−$38.1M−57.3%34.2K after24 lots10b5-1
Sep 15, 2026 (view filing)4:15 PM ETSep 141 dayMosley William DCEOSSale−1.87K$781.23−$1.46M−0.6%299.0K after
Sep 11, 2026 (view filing)4:47 PM ETSep 101 dayTeh Ban SengEVP & Chief Commercial OfficerSSale−663$860.09−$570.2K−10.2%5.81K after10b5-1
Sep 11, 2026 (view filing)4:47 PM ETSep 101 dayMorris John ChristopherEVP & CTOSSale−572.25$862.13−$493.4K−3.4%16.0K after2 lots
Sep 11, 2026 (view filing)4:46 PM ETSep 101 dayRomano GianlucaEVP & CFOSSale−1.35K$862.13−$1.16M−4.4%29.6K after2 lots
Sep 11, 2026 (view filing)4:46 PM ETSep 101 dayMosley William DCEOSSale−2.85K$862.13−$2.46M−0.9%297.5K after2 lots
Sep 3, 2026 (view filing)4:51 PM ETSep 12 daysMosley William DCEOSSale−30.0K$816.28−$24.5M−9.2%295.2K after26 lots10b5-1
Sep 3, 2026 (view filing)4:51 PM ETSep 12 daysConyers Yolanda LeeDirectorSSale−750$815.11−$611.3K−18.3%3.35K after10b5-1
Aug 26, 2026 (view filing)4:21 PM ETAug 242 daysLee James CIEVP & CLOSSale−9.01K$794.84−$7.16M−96.3%347 after29 lots10b5-1
Aug 24, 2026 (view filing)5:11 PM ETAug 213 daysTeh Ban SengEVP & Chief Commercial OfficerSSale−9.86K$852.97−$8.41M−65.4%5.21K after27 lots10b5-1
Aug 24, 2026 (view filing)5:11 PM ETAug 204 daysTeh Ban SengEVP & Chief Commercial OfficerSSale−6.05K$842.97−$5.10M−28.6%15.1K after19 lots10b5-1
Aug 24, 2026 (view filing)5:11 PM ETAug 20-214 daysMorris John ChristopherEVP & CTOSSale−4.04K$847.57−$3.42M−20.7%15.5K after4 lots10b5-1
Aug 24, 2026 (view filing)5:11 PM ETAug 213 daysLee James CIEVP & CLOSSale−3.94K$849.35−$3.35M−42.5%5.33K after3 lots
Aug 24, 2026 (view filing)5:10 PM ETAug 213 daysRomano GianlucaEVP & CFOSSale−9.08K$849.35−$7.71M−24.2%28.5K after3 lots
Aug 24, 2026 (view filing)5:10 PM ETAug 213 daysMosley William DCEOSSale−18.1K$849.35−$15.4M−5.5%311.2K after3 lots
Aug 14, 2026 (view filing)4:52 PM ETAug 131 dayTeh Ban SengEVP & Chief Commercial OfficerSSale−7.36K$920.80−$6.78M−71.5%2.93K after2 lots
Aug 11, 2026 (view filing)4:21 PM ETAug 74 daysRomano GianlucaEVP & CFOSSale−880$845.12−$743.7K−4.1%20.7K after8 lots10b5-1
Aug 11, 2026 (view filing)4:21 PM ETAug 74 daysRomano GianlucaEVP & CFOSSale−14.1K$811.25−$11.4M−39.5%21.5K after28 lots10b5-1
Aug 11, 2026 (view filing)4:21 PM ETAug 74 daysRomano GianlucaEVP & CFOSSale−7.24K$781.64−$5.66M−16.9%35.6K after29 lots10b5-1
Aug 4, 2026 (view filing)6:09 PM ETAug 31 dayMorris John ChristopherEVP & CTOSSale−168$817.76−$137.4K−1.4%11.9K after10b5-1
Aug 4, 2026 (view filing)6:09 PM ETAug 31 dayMosley William DCEOSSale−17.1K$827.30−$14.1M−5.5%295.5K after19 lots10b5-1
Aug 4, 2026 (view filing)6:09 PM ETAug 31 dayMosley William DCEOSSale−12.9K$803.47−$10.4M−4.0%312.6K after29 lots10b5-1
Aug 3, 2026 (view filing)4:14 PM ETJul 304 daysLee James CIEVP & CLOSSale−694$877.45−$609.0K−66.7%346.75 after10b5-1
Jul 24, 2026 (view filing)4:18 PM ETJul 231 dayLee James CIEVP & CLOSSale−542.25$905.01−$490.7K−34.7%1.02K after
Jul 2, 2026 (view filing)4:40 PM ETJul 11 dayMosley William DCEOSSale−9.34K$924.42−$8.64M−2.9%311.5K after15 lots10b5-1
Jul 2, 2026 (view filing)4:40 PM ETJul 11 dayMosley William DCEOSSale−20.7K$910.48−$18.8M−6.0%320.9K after29 lots10b5-1
Jun 15, 2026 (view filing)Jun 123 daysMorris John ChristopherEVP & CTOSSale−1.36K$880.19−$1.20M−10.1%12.1K after2 lots10b5-1
Jun 15, 2026 (view filing)Jun 123 daysTeh Ban SengEVP & Chief Commercial OfficerSSale−989$880.19−$870.5K−18.7%4.29K after10b5-1
Jun 15, 2026 (view filing)Jun 123 daysRomano GianlucaEVP & CFOSSale−903.25$880.19−$795.0K−2.1%42.9K after
Jun 15, 2026 (view filing)Jun 123 daysMosley William DCEOSSale−1.77K$880.19−$1.56M−0.5%327.5K after
Jun 11, 2026 (view filing)Jun 101 dayTeh Ban SengEVP & Chief Commercial OfficerSSale−663$821.86−$544.9K−13.4%4.29K after10b5-1
Jun 11, 2026 (view filing)Jun 101 dayMorris John ChristopherEVP & CTOSSale−573.75$821.65−$471.4K−4.4%12.5K after2 lots
Jun 11, 2026 (view filing)Jun 101 dayMosley William DCEOSSale−2.85K$821.74−$2.35M−0.9%326.0K after2 lots
Jun 11, 2026 (view filing)Jun 101 dayRomano GianlucaEVP & CFOSSale−1.35K$821.75−$1.11M−3.1%42.1K after2 lots
Jun 4, 2026 (view filing)Jun 4Same dayArumugavelu ShankarDirectorSSale−1.00K$927.68−$927.7K−13.1%6.63K after
Jun 2, 2026 (view filing)Jun 2Same dayBhatt PratDirectorSSale−1.00K$929.88−$929.9K−7.2%12.9K after10b5-1
Jun 2, 2026 (view filing)Jun 11 dayConyers Yolanda LeeDirectorSSale−750$885.33−$664.0K−15.5%4.10K after10b5-1
Jun 2, 2026 (view filing)Jun 11 dayMosley William DCEOSSale−13.8K$924.99−$12.7M−4.1%323.6K after20 lots10b5-1
Jun 2, 2026 (view filing)Jun 11 dayMosley William DCEOSSale−16.2K$900.21−$14.6M−4.6%337.4K after29 lots10b5-1
May 21, 2026 (view filing)May 201 dayMosley William DCEOSSale−30.0K$751.29−$22.5M−8.1%339.6K after19 lots10b5-1
May 14, 2026 (view filing)May 13-141 dayTeh Ban SengEVP & Chief Commercial OfficerSSale−15.6K$815.42−$12.7M−80.8%3.69K after23 lots10b5-1
May 8, 2026 (view filing)May 71 dayRomano GianlucaEVP & CFOSSale−1.90K$770.00−$1.46M−4.4%40.9K after10b5-1