The Filings Report

Seagate Technology Holdings PLC insider trading

STXfinancial statementsForm 4 filings on EDGAR1,166 transactions since Nov 1, 2024

From August 4, 2026 to November 1, 2026, 0 insiders at Seagate Technology Holdings PLC bought $0 of stock in the open market, and 6 sold $354M. Officers and directors accounted for $0 of purchases and $354M of sales. The last reported transaction was an option exercise by Tilenius Stephanie on October 24, 2026.

The answer card and chart use the same period. Change the range above the chart to update both. Form 4 filings through October 26, 2026; awards, option exercises, tax withholding and gifts are excluded from these totals.

Stock price and insider activity

Daily price candles with insider purchases and sales directly beneath them on the same timeline. Bars show individual days; totals sum all days in the selected period.

STX daily priceSplit-adjusted prices in US dollars

Bought $0Sold $354MAug 4, 2026 – Nov 1, 2026

Oct 30, 2026O $652.00 · H $678.49 · L $625.30 · C $644.58Bought $0 (0)Sold $0 (0)
$597$707$817$928$10382026-08-04: open $880.89, high $885.00, low $833.97, close $845.352026-08-05: open $848.13, high $884.90, low $836.56, close $837.662026-08-06: open $784.01, high $874.97, low $767.69, close $852.952026-08-07: open $862.68, high $862.68, low $761.80, close $812.762026-08-10: open $802.95, high $826.90, low $786.00, close $800.992026-08-11: open $805.00, high $826.90, low $794.01, close $820.522026-08-12: open $861.35, high $892.00, low $849.60, close $878.212026-08-13: open $872.31, high $934.77, low $861.55, close $921.372026-08-14: open $941.26, high $990.61, low $920.00, close $973.442026-08-17: open $993.36, high $1013.99, low $978.63, close $994.792026-08-18: open $929.50, high $961.27, low $898.68, close $903.682026-08-19: open $911.40, high $915.16, low $829.11, close $832.562026-08-20: open $833.68, high $869.71, low $827.60, close $850.242026-08-21: open $862.64, high $869.99, low $834.50, close $850.002026-08-24: open $818.60, high $822.74, low $774.00, close $794.652026-08-25: open $814.50, high $826.00, low $800.12, close $821.672026-08-26: open $825.60, high $851.69, low $821.67, close $846.372026-08-27: open $875.75, high $875.75, low $812.94, close $847.202026-08-28: open $831.09, high $855.58, low $825.50, close $829.762026-08-31: open $826.50, high $830.68, low $808.49, close $828.382026-09-01: open $810.26, high $832.76, low $802.05, close $816.642026-09-02: open $805.86, high $835.40, low $785.66, close $808.542026-09-03: open $796.00, high $807.07, low $763.52, close $798.612026-09-04: open $818.75, high $852.98, low $805.01, close $849.282026-09-08: open $880.65, high $925.44, low $860.01, close $904.382026-09-09: open $893.14, high $917.39, low $885.39, close $885.922026-09-10: open $860.56, high $880.97, low $848.24, close $862.332026-09-11: open $869.42, high $870.68, low $817.69, close $830.172026-09-14: open $778.12, high $821.86, low $769.15, close $805.552026-09-15: open $800.24, high $801.98, low $758.35, close $771.812026-09-16: open $784.80, high $798.88, low $772.01, close $783.182026-09-17: open $809.03, high $816.68, low $783.01, close $803.132026-09-18: open $814.69, high $872.00, low $807.03, close $858.792026-09-21: open $894.27, high $914.82, low $861.96, close $877.332026-09-22: open $857.69, high $936.94, low $856.39, close $919.842026-09-23: open $913.20, high $927.00, low $885.00, close $923.862026-09-24: open $914.66, high $926.01, low $898.80, close $905.922026-09-25: open $924.36, high $924.36, low $903.53, close $916.832026-09-28: open $912.10, high $932.87, low $870.38, close $921.512026-09-29: open $943.00, high $944.43, low $900.10, close $913.452026-09-30: open $921.00, high $928.92, low $907.03, close $922.342026-10-01: open $911.16, high $946.36, low $893.75, close $945.572026-10-02: open $822.56, high $852.29, low $791.75, close $848.992026-10-05: open $876.00, high $903.00, low $875.00, close $887.092026-10-06: open $857.12, high $863.50, low $798.62, close $805.632026-10-07: open $784.25, high $810.78, low $780.90, close $807.572026-10-08: open $794.45, high $801.95, low $770.06, close $774.832026-10-09: open $784.16, high $789.59, low $766.09, close $783.002026-10-12: open $767.00, high $770.00, low $750.68, close $753.252026-10-13: open $694.89, high $749.00, low $693.93, close $747.202026-10-14: open $733.04, high $751.81, low $711.63, close $713.542026-10-15: open $679.99, high $691.99, low $652.29, close $690.812026-10-16: open $677.17, high $683.48, low $636.36, close $639.012026-10-19: open $665.00, high $675.71, low $654.52, close $660.812026-10-20: open $656.48, high $680.70, low $642.42, close $675.132026-10-21: open $708.25, high $715.63, low $682.72, close $696.892026-10-22: open $669.56, high $672.77, low $629.00, close $642.142026-10-23: open $633.00, high $655.60, low $621.00, close $630.492026-10-26: open $632.25, high $665.55, low $621.65, close $644.212026-10-27: open $650.34, high $687.05, low $647.94, close $667.852026-10-28: open $646.84, high $698.94, low $621.50, close $697.972026-10-29: open $687.27, high $718.65, low $675.41, close $700.472026-10-30: open $652.00, high $678.49, low $625.30, close $644.58Insider purchases / sales · USD$200M$0−$200M2026-08-07: 0 purchases ($0), 65 sales ($18M)2026-08-13: 0 purchases ($0), 2 sales ($7M)2026-08-20: 0 purchases ($0), 20 sales ($6M)2026-08-21: 0 purchases ($0), 39 sales ($38M)2026-08-24: 0 purchases ($0), 29 sales ($7M)2026-09-01: 0 purchases ($0), 27 sales ($25M)2026-09-10: 0 purchases ($0), 7 sales ($5M)2026-09-11: 0 purchases ($0), 38 sales ($42M)2026-09-14: 0 purchases ($0), 4 sales ($3M)2026-09-15: 0 purchases ($0), 27 sales ($167M)2026-09-21: 0 purchases ($0), 26 sales ($8M)2026-10-01: 0 purchases ($0), 44 sales ($28M)2026-10-23: 0 purchases ($0), 1 sales ($351K)Aug 4Aug 26Sep 17Oct 9Oct 30

purchases above zero; sales below. Both use the transaction date and the same dollar scale. Hover, tap, or use arrow keys to inspect a date. Awards, exercises, tax withholding and gifts are excluded.

Dates with prices or insider activity are spaced evenly; empty weekends and holidays are omitted. Prices through Oct 30, 2026. Insider data through Nov 1, 2026. Prices are adjusted for splits; transaction values are reported dollars.

Every transaction

1,166 transactions from November 1, 2024 to November 1, 2026, newest first. Open-market purchases and sales are coloured; awards, exercises, tax withholding and gifts are grey and not counted.

TradedInsiderRoleTransactionSharesPriceValueHeld afterFiled
Oct 24, 2026Tilenius StephanieDirectoroption exercise1,580$0.00—12,244Oct 26, 2026
Oct 24, 2026Tilenius StephanieDirectortax withholding380$630.49$240K11,864Oct 26, 2026
Oct 24, 2026Szlosek Thomas ADirectoroption exercise1,580$0.00—1,938Oct 26, 2026
Oct 24, 2026Szlosek Thomas ADirectortax withholding380$630.49$240K1,558Oct 26, 2026
Oct 24, 2026Haggart Dylan G.Directoroption exercise1,580$0.00—16,095Oct 26, 2026
Oct 24, 2026Haggart Dylan G.Directortax withholding380$630.49$240K15,715Oct 26, 2026
Oct 24, 2026Geldmacher Jay LDirectoroption exercise1,580$0.00—1,803Oct 26, 2026
Oct 24, 2026Geldmacher Jay LDirectortax withholding380$630.49$240K1,423Oct 26, 2026
Oct 24, 2026Conyers Yolanda LeeDirectoroption exercise1,580$0.00—4,931Oct 26, 2026
Oct 24, 2026Conyers Yolanda LeeDirectortax withholding380$630.49$240K4,551Oct 26, 2026
Oct 24, 2026Clemmer Richard LDirectoroption exercise1,580$0.00—31,284Oct 26, 2026
Oct 24, 2026Clemmer Richard LDirectortax withholding380$630.49$240K30,904Oct 26, 2026
Oct 24, 2026Cannon Michael RDirectoroption exercise1,868$0.00—15,307Oct 26, 2026
Oct 24, 2026Cannon Michael RDirectortax withholding449$630.49$283K14,858Oct 26, 2026
Oct 24, 2026Bhatt PratDirectoroption exercise1,580$0.00—14,449Oct 26, 2026
Oct 24, 2026Bhatt PratDirectortax withholding380$630.49$240K14,069Oct 26, 2026
Oct 24, 2026Arumugavelu ShankarDirectoroption exercise1,580$0.00—8,206Oct 26, 2026
Oct 24, 2026Arumugavelu ShankarDirectortax withholding380$630.49$240K7,826Oct 26, 2026
Oct 24, 2026Adams MarkDirectoroption exercise1,580$0.00—3,626Oct 26, 2026
Oct 24, 2026Adams MarkDirectortax withholding380$630.49$240K3,246Oct 26, 2026
Oct 23, 2026Lee James CIEVP & CLOopen-market sale547$642.14$351K1,037Oct 26, 2026
Oct 22, 2026Lee James CIEVP & CLOoption exercise1,237$0.00—1,584Oct 26, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1360$929.01$334K372,750Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1855$930.03$795K371,895Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-11,665$930.99$2M370,230Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-11,320$932.04$1M368,910Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1840$933.28$784K368,070Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1822$934.35$768K367,248Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1640$935.15$598K366,608Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1759$936.43$711K365,849Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1579$937.33$543K365,270Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1640$938.32$601K364,630Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1720$939.27$676K363,910Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-180$940.20$75K363,830Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-140$941.22$38K363,790Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1280$943.21$264K363,510Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1440$944.81$416K363,070Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1962$945.97$910K362,108Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoroption exercise14,000$46.23$647K392,108Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1360$898.10$323K391,748Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1517$900.46$466K391,231Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1440$901.49$397K390,791Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1384$902.55$347K390,407Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1696$903.36$629K389,711Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1480$904.33$434K389,231Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1480$905.38$435K388,751Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1601$906.42$545K388,150Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1560$907.43$508K387,590Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-11,027$908.58$933K386,563Oct 2, 2026
Oct 1, 2026Mosley William DCEO, Directoropen-market sale10b5-1307$909.84$279K386,256Oct 2, 2026

Who the insiders are

Everyone who reported a transaction since November 1, 2024, by open-market value over twelve months. Shares held are after the insider’s latest directly held transaction.

InsiderRoleLast transactionKindShares heldBought, 12 monthsSold, 12 monthsSales under a plan
Mosley William DCEO, DirectorOct 1, 2026open-market sale372,750—$304M (330)319 of 330
Romano GianlucaEVP & CFOSep 15, 2026open-market sale70,757—$146M (174)165 of 174
Teh Ban SengEVP & Chief Commercial OfficerSep 15, 2026open-market sale57,626—$89M (106)100 of 106
Morris John ChristopherEVP & CTOSep 21, 2026option exercise32,047—$31M (56)50 of 56
Lee James CIEVP & CLOOct 23, 2026open-market sale1,037—$13M (38)33 of 38
Chong Kian FattEVP Global OperationsSep 14, 2026option exercise25,093—$2M (1)0 of 1
Arumugavelu ShankarDirectorOct 24, 2026option exercise8,206—$2M (2)0 of 2
Conyers Yolanda LeeDirectorOct 24, 2026option exercise4,931—$2M (4)4 of 4
Tilenius StephanieDirectorOct 24, 2026option exercise12,244—$2M (3)0 of 3
Bhatt PratDirectorOct 24, 2026option exercise14,449—$930K (1)1 of 1
Geldmacher Jay LDirectorOct 24, 2026option exercise1,803—$414K (1)0 of 1
Cannon Michael RDirectorOct 24, 2026option exercise15,307———
Szlosek Thomas ADirectorOct 24, 2026option exercise1,938———
Haggart Dylan G.DirectorOct 24, 2026option exercise16,095———
Clemmer Richard LDirectorOct 24, 2026option exercise31,284———
Adams MarkDirectorOct 24, 2026option exercise3,626———
Bruner JudyDirectorOct 19, 2025option exercise————

Questions

Are Seagate Technology Holdings PLC insiders buying or selling?

Over the twelve months to November 1, 2026, 11 insiders at Seagate Technology Holdings PLC sold $592M of stock in the open market, all by officers and directors, and no insider bought. Net, insiders sold $592M. Only open-market purchases and sales are counted.

Who sold the most Seagate Technology Holdings PLC stock in the last year?

Mosley William D (CEO, Director) sold $304M in 330 open-market sales over the twelve months to November 1, 2026.

Do Seagate Technology Holdings PLC executives sell under 10b5-1 plans?

672 of the 716 open-market sales in the last twelve months (94%) were reported as made under a Rule 10b5-1 trading plan, set up in advance. A sale under a plan is still counted as a sale.

What counts as insider buying here?

Only open-market purchases (Form 4 code P) and sales (code S) by officers, directors and 10% owners. Stock awards, option exercises, shares withheld for tax and gifts are listed in the table but never counted as buying or selling.

More on Seagate Technology Holdings PLC

From Form 4, 4/A and 5 filings with the SEC. A record of insider transactions, not a recommendation.