STX Seagate Technology plc
Seagate Technology plc (STX) Institutional Ownership
What the institutions did with STX last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
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Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 15.2M | 8.0% |
| VANGUARD CAPITAL MANAGEMENT LLC | 14.6M | 7.8% |
| STATE STREET CORP | 9.9M | 5.3% |
| FMR LLC | 8.2M | 4.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 8.0M | 4.2% |
| Invesco Ltd. | 7.5M | 4.0% |
| WCM INVESTMENT MANAGEMENT, LLC | 5.3M | 2.8% |
| JPMORGAN CHASE & CO | 5.2M | 2.8% |
| GEODE CAPITAL MANAGEMENT, LLC | 5.2M | 2.7% |
| MORGAN STANLEY | 4.7M | 2.5% |
| Capital Research Global Investors | 4.3M | 2.3% |
| Sanders Capital, LLC | 3.5M | 1.9% |
| GOLDMAN SACHS GROUP INC | 3.4M | 1.8% |
| NORGES BANK | 3.1M | 1.6% |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2.6M | 1.4% |
| WELLINGTON MANAGEMENT GROUP LLP | 2.4M | 1.3% |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.1M | 1.1% |
| BANK OF AMERICA CORP /DE/ | 2.1M | 1.1% |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 2.1M | 1.1% |
| NORTHERN TRUST CORP | 1.9M | 1.0% |
| FRANKLIN RESOURCES INC | 1.8M | 1.0% |
| Jupiter Topco LLC | 1.6M | 0.9% |
| DEUTSCHE BANK AG\ | 1.6M | 0.8% |
| Legal & General Group Plc | 1.5M | 0.8% |
| JANE STREET GROUP, LLC | 1.5M | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Sanders Capital, LLC | Reduced | 12.9M | 3.5M | -9.4M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 11.1M | 8.0M | -3.1M |
| WELLINGTON MANAGEMENT GROUP LLP | Increased | 87.6K | 2.4M | +2.3M |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | Reduced | 1.8M | 5.5K | -1.8M |
| FRANKLIN RESOURCES INC | Reduced | 3.5M | 1.8M | -1.7M |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | Reduced | 3.6M | 2.1M | -1.5M |
| JPMORGAN CHASE & CO | Reduced | 6.7M | 5.2M | -1.5M |
| JANE STREET GROUP, LLC | Increased | 19.7K | 1.5M | +1.5M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 1.5M | 91.9K | -1.4M |
| Capital Research Global Investors | Reduced | 5.7M | 4.3M | -1.4M |
| BANK OF AMERICA CORP /DE/ | Reduced | 3.4M | 2.1M | -1.3M |
| EXCHANGE TRADED CONCEPTS, LLC | Increased | 30.1K | 1.2M | +1.1M |
| Capital International Investors | New | 0 | 1.0M | +1.0M |
| LONE PINE CAPITAL LLC | New | 0 | 1.0M | +1.0M |
| WCM INVESTMENT MANAGEMENT, LLC | Increased | 4.3M | 5.3M | +973.6K |
| BlackRock, Inc. | Increased | 14.3M | 15.2M | +892.7K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Increased | 1.4M | 2.1M | +704.9K |
| CITADEL ADVISORS LLC | Increased | 110.7K | 755.5K | +644.8K |
| Holocene Advisors, LP | Reduced | 1.1M | 460.2K | -627.4K |
| STATE STREET CORP | Increased | 9.3M | 9.9M | +590.0K |
| Qube Research & Technologies Ltd | Increased | 1.6K | 552.8K | +551.2K |
| Fi3 FINANCIAL ADVISORS, LLC | New | 0 | 535.5K | +535.5K |
| Soroban Capital Partners LP | Sold Out | 534.4K | 0 | -534.4K |
| Trivest Advisors Ltd | Increased | 208.0K | 737.8K | +529.8K |
| Winslow Capital Management, LLC | New | 0 | 517.0K | +517.0K |
| VANGUARD CAPITAL MANAGEMENT LLC | Increased | 14.2M | 14.6M | +474.4K |
| Sachem Head Capital Management LP | New | 0 | 472.0K | +472.0K |
| SG Americas Securities, LLC | New | 0 | 461.7K | +461.7K |
| ALLIANCEBERNSTEIN L.P. | Increased | 195.4K | 649.1K | +453.7K |
| MILLENNIUM MANAGEMENT LLC | Increased | 250.3K | 633.1K | +382.8K |
| Invesco Ltd. | Increased | 7.2M | 7.5M | +360.2K |
| BANK OF MONTREAL /CAN/ | Reduced | 1.0M | 658.8K | -349.7K |
| California Public Employees Retirement System | Increased | 360.4K | 698.1K | +337.8K |
| Amundi | Increased | 965.6K | 1.3M | +319.5K |
| VOYA INVESTMENT MANAGEMENT LLC | Increased | 127.0K | 442.6K | +315.6K |
| TIGER GLOBAL MANAGEMENT LLC | New | 0 | 285.1K | +285.1K |
| Russell Investments Group, Ltd. | Reduced | 966.5K | 687.4K | -279.1K |
| Point72 Asset Management, L.P. | Increased | 546.4K | 822.9K | +276.5K |
| Clearbridge Investments, LLC | Increased | 3.2K | 272.8K | +269.6K |
| TWO SIGMA INVESTMENTS, LP | Increased | 102.5K | 354.8K | +252.3K |
| AQR CAPITAL MANAGEMENT LLC | Increased | 1.0M | 1.2M | +244.3K |
| CANADA PENSION PLAN INVESTMENT BOARD | Reduced | 883.6K | 639.7K | -243.9K |
| Maple Rock Capital Partners Inc. | Reduced | 534.0K | 301.2K | -232.8K |
| Bank of New York Mellon Corp | Increased | 1.1M | 1.3M | +227.9K |
| Quadrature Capital Ltd | Increased | 97.6K | 313.5K | +216.0K |
| Evergreen Quality Fund GP, Ltd. | New | 0 | 211.5K | +211.5K |
| UBS Group AG | Increased | 632.7K | 840.0K | +207.3K |
| Value Aligned Research Advisors, LLC | Reduced | 914.7K | 709.4K | -205.3K |
| Squarepoint Ops LLC | Reduced | 268.9K | 63.9K | -205.0K |
| CACTI ASSET MANAGEMENT LLC | Reduced | 526.0K | 327.9K | -198.1K |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | New | 0 | 190.8K | +190.8K |
| Oxbow Capital Management (HK) Ltd | Sold Out | 190.2K | 0 | -190.2K |
| SANDS CAPITAL MANAGEMENT, LLC | Increased | 531.9K | 720.7K | +188.8K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Increased | 1.3M | 1.4M | +171.9K |
| DEUTSCHE BANK AG\ | Reduced | 1.8M | 1.6M | -167.5K |
| TD Asset Management Inc | Increased | 116.6K | 283.5K | +167.0K |
| Alyeska Investment Group, L.P. | Increased | 125.1K | 291.4K | +166.4K |
| ING GROEP NV | Increased | 25.6K | 191.5K | +165.9K |
| Nuveen, LLC | Reduced | 771.4K | 605.9K | -165.5K |
| BESSEMER GROUP INC | Increased | 12.8K | 171.2K | +158.4K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.