Seagate Technology Holdings plc (STX) shareholders
STXNasdaqComputer Storage DevicesFiscal year ends June 27
Financials through Q1 FY2027, quarter ended Oct 2, 2026Last filing: 10-Q on Oct 29, 2026Score 17/3010% above fair value
$528.29−16.85 (-3.09%)
Close on Nov 13, 2026Market cap $121.28BP/E 27.7Yield 0.56%
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
81.8%
188M of 230M shares
Institutional holders
1,951
578 new, 66 sold out
Net institutional buying
-1M
In Q2 2026
Insider trades, 12 months
0 buys · 733 sales
Net sold $585.36M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Vanguard Capital Management | 16,318,822 | 7.48% | 13G (passive) | Mar 31, 2026 |
| Sanders Capital, LLC Joint filing with Lewis A. Sanders (5.98%) | 13,035,275 | 5.98% | 13G (passive) amendment | Mar 31, 2026 |
| BlackRock, Inc. | 12,954,300 | 6.10% | 13G (passive) amendment | Mar 31, 2025 |
| FMR LLC Joint filing with Abigail P. Johnson (5.10%) | 11,459,204 | 5.10% | 13G (passive) | Sep 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of STX | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 15,166,793 | 6.61% | $14.64B | +892,710 | 0.22% |
| Vanguard Capital Management LLC | 14,630,067 | 6.37% | $14.12B | +474,394 | 0.30% |
| State Street Corp | 9,911,669 | 4.32% | $9.57B | +590,037 | 0.28% |
| FMR LLC | 8,153,134 | 3.55% | $7.87B | −23,784 | 0.34% |
| Vanguard Portfolio Management LLC | 7,999,686 | 3.48% | $7.72B | −3,095,222 | 0.35% |
| Invesco Ltd. | 7,536,880 | 3.28% | $7.27B | +360,182 | 0.58% |
| Wcm Investment Management, LLC | 5,320,463 | 2.32% | $5.15B | +973,611 | 9.34% |
| JPMorgan Chase & Co | 5,201,103 | 2.27% | $5.04B | −1,458,136 | 0.28% |
| Geode Capital Management, LLC | 5,155,435 | 2.25% | $4.96B | +94,607 | 0.26% |
| Morgan Stanley | 4,720,524 | 2.06% | $4.56B | −38,788 | 0.24% |
| Capital Research Global Investors | 4,326,781 | 1.88% | $4.18B | −1,409,289 | 0.58% |
| Sanders Capital, LLC | 3,487,219 | 1.52% | $3.37B | −9,409,982 | 3.37% |
| Goldman Sachs Group Inc | 3,440,106 | 1.50% | $3.32B | −133,684 | 0.29% |
| Norges Bank | 3,095,723 | 1.35% | $2.99B | New | 0.30% |
| Massachusetts Financial Services Co /Ma/ | 2,560,276 | 1.12% | $2.51B | +24,154 | 0.80% |
| Wellington Management Group Llp | 2,414,136 | 1.05% | $2.33B | +2,326,538 | 0.40% |
| Arrowstreet Capital, Limited Partnership | 2,138,429 | 0.93% | $2.06B | +704,934 | 0.92% |
| Bank Of America Corp /De/ | 2,115,112 | 0.92% | $2.04B | −1,265,328 | 0.13% |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 2,108,402 | 0.92% | $2.03B | −1,511,670 | 1.56% |
| Northern Trust Corp | 1,902,241 | 0.83% | $1.84B | +5,248 | 0.21% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 1,951 | 188M | 81.8% | 578 / 623 | 599 / 66 | 31M | 32M |
| Q1 2026 | 1,461 | 190M | 82.6% | 308 / 491 | 501 / 102 | 48M | 24M |
| Q4 2025 | 1,271 | 194M | 84.6% | 255 / 446 | 407 / 85 | 32M | 45M |
| Q3 2025 | 1,117 | 207M | 90.3% | 275 / 370 | 320 / 83 | 34M | 26M |
| Q2 2025 | 947 | 200M | 87.0% | 238 / 310 | 273 / 76 | 27M | 26M |
| Q1 2025 | 795 | 199M | 86.6% | 99 / 281 | 287 / 92 | 25M | 17M |
| Q4 2024 | 801 | 191M | 83.3% | 106 / 327 | 259 / 111 | 25M | 42M |
| Q3 2024 | 816 | 209M | 90.9% | 107 / 303 | 264 / 75 | 28M | 15M |
| Q2 2024 | 793 | 209M | 91.1% | 107 / 291 | 254 / 70 | 18M | 22M |
| Q1 2024 | 764 | 214M | 93.1% | 109 / 247 | 275 / 61 | 24M | 21M |
| Q4 2023 | 724 | 211M | 92.0% | 139 / 206 | 261 / 54 | 42M | 16M |
| Q3 2023 | 651 | 185M | 80.7% | 71 / 201 | 242 / 67 | 26M | 17M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
370 funds held STX in Q2 2026, 58% of their shares through ETFs. Each fund counts once per quarter, from its quarter-end report.
| Fund | Shares | % of STX | Value | % of fund | As of |
|---|---|---|---|---|---|
| Vanguard Total Stock Market Index Fund | 7,118,460 | 3.10% | $6.87B | 0.30% | Jun 30, 2026 |
| Vanguard 500 Index Fund | 5,814,131 | 2.53% | $5.61B | 0.34% | Jun 30, 2026 |
| Invesco QQQ Trust, Series 1 | 4,759,747 | 2.07% | $4.59B | 0.94% | Jun 30, 2026 |
| Vanguard Mid-Cap Index Fund | 2,429,312 | 1.06% | $2.34B | 1.05% | Jun 30, 2026 |
| Vanguard Growth Index Fund | 2,394,278 | 1.04% | $2.31B | 0.61% | Jun 30, 2026 |
| Vanguard Information Technology Index Fund | 1,570,750 | 0.68% | $1.38B | 0.80% | May 31, 2026 |
| WCM Focused International Growth Fund | 1,364,300 | 0.59% | $1.32B | 5.85% | Jun 30, 2026 |
| Vanguard Institutional Index Fund | 1,217,274 | 0.53% | $1.17B | 0.34% | Jun 30, 2026 |
| Roundhill Memory ETF | 1,125,391 | 0.49% | $1.09B | 4.19% | Jun 30, 2026 |
| Invesco NASDAQ 100 ETF | 926,502 | 0.40% | $815.14M | 0.84% | May 31, 2026 |
| Growth-Income Fund | 872,636 | 0.38% | $842.09M | 1.83% | Jun 30, 2026 |
| Investment Co of America | 862,994 | 0.38% | $832.79M | 0.45% | Jun 30, 2026 |
| Vanguard Mid-Cap Growth Index Fund | 859,383 | 0.37% | $829.30M | 2.38% | Jun 30, 2026 |
| Vanguard Wellington Fund | 738,160 | 0.32% | $649.43M | 0.52% | May 31, 2026 |
| Capital Income Builder | 726,827 | 0.32% | $622.26M | 0.48% | Jul 31, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| William D. Mosley | CEO, Director | 346,108 | 0.15% | Nov 3, 2026 |
| John Christopher Morris | EVP & CTO | 20,933 | 0.01% | Nov 3, 2026 |
| James CI Lee | EVP & CLO | 1,037 | 0.00% | Oct 26, 2026 |
| Kian Fatt Chong | EVP Global Operations | 25,093 | 0.01% | Sep 16, 2026 |
| Ban Seng Teh | EVP & Chief Commercial Officer | 8,290 | 0.00% | Sep 16, 2026 |
| Gianluca Romano | EVP & CFO | 70,757 | 0.03% | Sep 16, 2026 |
| Jay L. Geldmacher | Director | 1,423 | 0.00% | Oct 26, 2026 |
| Prat Bhatt | Director | 14,069 | 0.01% | Oct 26, 2026 |
| Stephanie Tilenius | Director | 11,864 | 0.01% | Oct 26, 2026 |
| Dylan G. Haggart | Director | 26,412,280 | 11.51% | Oct 26, 2026 |
| Shankar Arumugavelu | Director | 7,826 | 0.00% | Oct 26, 2026 |
| Thomas A. Szlosek | Director | 1,558 | 0.00% | Oct 26, 2026 |
| Yolanda Lee Conyers | Director | 4,551 | 0.00% | Oct 26, 2026 |
| Mark Adams | Director | 17,554 | 0.01% | Oct 26, 2026 |
| Michael R. Cannon | Director | 21,743 | 0.01% | Oct 26, 2026 |
| Richard L. Clemmer | Director | 34,771 | 0.02% | Oct 26, 2026 |
| Judy Bruner | Director | 18,585 | 0.01% | Oct 21, 2025 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −80 | $644.43 | $51.55K | 346,108 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −160 | $642.78 | $102.84K | 346,188 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −120 | $640.46 | $76.86K | 346,348 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −160 | $636.08 | $101.77K | 346,468 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −240 | $633.64 | $152.07K | 346,628 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −80 | $632.55 | $50.60K | 346,868 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −320 | $625.68 | $200.22K | 346,948 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −640 | $623.91 | $399.30K | 347,268 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −240 | $623.01 | $149.52K | 347,908 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,080 | $621.89 | $671.65K | 348,148 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −720 | $620.80 | $446.98K | 349,228 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,160 | $619.60 | $718.73K | 349,948 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −760 | $618.80 | $470.29K | 351,108 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −960 | $617.67 | $592.96K | 351,868 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −760 | $616.66 | $468.66K | 352,828 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −800 | $615.31 | $492.25K | 353,588 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −280 | $614.54 | $172.07K | 354,388 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −920 | $613.44 | $564.36K | 354,668 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −520 | $612.35 | $318.42K | 355,588 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −560 | $611.30 | $342.33K | 356,108 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −680 | $610.17 | $414.92K | 356,668 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,177 | $609.41 | $717.27K | 357,348 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −891 | $608.40 | $542.08K | 358,525 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −2,372 | $607.28 | $1.44M | 359,416 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,082 | $606.25 | $655.96K | 361,788 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,600 | $605.30 | $968.48K | 362,870 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −600 | $603.66 | $362.20K | 364,470 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −560 | $602.48 | $337.39K | 365,070 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −400 | $601.26 | $240.50K | 365,630 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,200 | $600.07 | $720.09K | 366,030 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −560 | $599.01 | $335.45K | 367,230 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −481 | $597.91 | $287.59K | 367,790 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −240 | $596.73 | $143.22K | 368,271 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −678 | $595.68 | $403.87K | 368,511 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,480 | $594.55 | $879.93K | 369,189 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,639 | $593.47 | $972.69K | 370,669 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −1,400 | $592.71 | $829.79K | 372,308 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −280 | $591.23 | $165.54K | 373,708 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −800 | $590.40 | $472.32K | 373,988 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −600 | $589.27 | $353.56K | 374,788 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Sale(10b5-1 plan) | −720 | $587.99 | $423.35K | 375,388 |
| William D. Mosley CEO, Director | Nov 2, 2026 | Option exercise | +14,000 | $46.23 | $647.22K | 376,108 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −6 | $678.44 | $4.07K | 20,933 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −34 | $677.05 | $23.02K | 20,939 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −120 | $670.18 | $80.42K | 20,973 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −80 | $665.05 | $53.20K | 21,093 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $663.14 | $26.53K | 21,173 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −132 | $660.64 | $87.20K | 21,213 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −68 | $659.56 | $44.85K | 21,345 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −80 | $658.56 | $52.68K | 21,413 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −160 | $656.99 | $105.12K | 21,493 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $655.51 | $26.22K | 21,653 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −995 | $653.78 | $650.51K | 21,693 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $648.57 | $25.94K | 22,688 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −80 | $646.96 | $51.76K | 22,728 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $645.45 | $25.82K | 22,808 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −80 | $643.35 | $51.47K | 22,848 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $641.84 | $25.67K | 22,928 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $639.76 | $25.59K | 22,968 |
| John Christopher Morris EVP & CTO | Oct 30, 2026 | Sale(10b5-1 plan) | −40 | $636.30 | $25.45K | 23,008 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Short interest
Shares sold short and not yet bought back, as of Oct 30, 2026 (FINRA, reported twice a month)
Short % of float
4.17%
8M shares short
Days to cover
1.4
At 6M shares a day
Change since last report
+7.4%
From 8M shares
Short volume, 20 days
41.9%
Of volume reported to FINRA
Shares sold short, last 12 months
Short sale volume counts trades marked short on any given day, including market-maker hedging, so it runs far higher than the share of Seagate Technology's stock actually held short. Settlement fails (shares not delivered on time) peaked at 618 shares on Sep 23, 2026 over the last 90 days.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| James CI Lee Officer | Oct 23, 2026 | 600 | $379.79K | Oct 23, 2026 | Restricted Stock Unit Vesting |
| John Christopher Morris Officer | Sep 21, 2026 | 14,849 | $12.75M | Sep 21, 2026 | Exercise of Stock Options |
| John Christopher Morris Officer | Sep 15, 2026 | 16,239 | $12.54M | Sep 15, 2026 | Performance Share Unit Vesting |
| William D. Mosley Officer, Director | Sep 15, 2026 | 102,784 | $79.36M | Sep 15, 2026 | Performance Share Unit Vesting |
| Gianluca Romano Officer | Sep 15, 2026 | 52,483 | $40.52M | Sep 15, 2026 | Performance Share Unit Vesting |
| Ban Seng Teh Officer | Sep 15, 2026 | 52,730 | $41.24M | Sep 15, 2026 | Performance Shares |
| John Christopher Morris Officer | Sep 14, 2026 | 518 | $404.41K | Sep 14, 2026 | Restricted Stock Unit Vesting |
| Gianluca Romano Officer | Sep 14, 2026 | 1,003 | $783.39K | Sep 14, 2026 | Restricted Stock Unit Vesting |
| William D. Mosley Officer, Director | Sep 14, 2026 | 1,963 | $1.53M | Sep 14, 2026 | Restricted Stock Unit Vesting |
| Ban Seng Teh Officer | Sep 14, 2026 | 989 | $770.43K | Sep 14, 2026 | Restricted Stock |
| Gianluca Romano Officer | Sep 11, 2026 | 50,498 | $43.55M | Sep 11, 2026 | Exercise of Stock Options |
| Ban Seng Teh Officer | Sep 10, 2026 | 663 | $570.24K | Sep 10, 2026 | Restricted Stock |
| John Christopher Morris Officer | Sep 10, 2026 | 601 | $518.02K | Sep 10, 2026 | Restricted Stock Unit Vesting |
| William D. Mosley Officer, Director | Sep 10, 2026 | 2,992 | $2.58M | Sep 10, 2026 | Restricted Stock Unit Vesting |
| Gianluca Romano Officer | Sep 10, 2026 | 1,415 | $1.22M | Sep 10, 2026 | Restricted Stock Unit Vesting |
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