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NasdaqGS · Technology · Holders
Seagate Technology Holdings PLC top institutional holders.
Top institutional shareholders of STX ranked by position size, plus filing changes and recent insider transactions when available.
- Holder rows
- 120
- Market data feed
- Latest filing
- Mar 31, 2026
- Most recent holder report date
- Increased / initiated
- 61
- 57 decreased in loaded rows
- Insider rows
- 120
- Market data feed
Top 120 institutional holders
Seagate Technology Holdings PLC (STX)
| # | Institution | % held | Shares | Change | Change % | Filing date |
|---|---|---|---|---|---|---|
| 1 | 12.5% | 28.12M | -20.86K decreased | -7.00% | Dec 31, 2025 | |
| 2 | 6.34% | 14.27M | -1.84M decreased | -11.43% | Mar 31, 2026 | |
| 3 | 6.28% | 14.16M | +14.16M initiated | — | Mar 31, 2026 | |
| 4 | SANDERS CAPITAL | 5.72% | 12.90M | -4.28M decreased | -24.93% | Mar 31, 2026 |
| 5 | 4.92% | 11.09M | +11.09M initiated | — | Mar 31, 2026 | |
| 6 | 4.14% | 9.32M | -49.17K decreased | -53.00% | Mar 31, 2026 | |
| 7 | 3.63% | 8.18M | +4.42M increased | +1.17% | Mar 31, 2026 | |
| 8 | 2.96% | 6.66M | -338.74K decreased | -4.84% | Mar 31, 2026 | |
| 9 | 2.55% | 5.74M | +1.22M increased | +27.13% | Mar 31, 2026 | |
| 10 | 2.25% | 5.06M | +164.01K increased | +3.35% | Mar 31, 2026 | |
| 11 | 2.11% | 4.76M | -558.20K decreased | -10.50% | Mar 31, 2026 | |
| 12 | WCM INVESTMENT MANAGEMENT | 1.93% | 4.35M | -808.02K decreased | -15.68% | Mar 31, 2026 |
| 13 | DZ BANK AG DEUTSCHE ZENTRAL GENOSSENSCHAFTS BANK | 1.61% | 3.62M | -1.80M decreased | -33.16% | Mar 31, 2026 |
| 14 | 1.59% | 3.57M | +818.12K increased | +29.69% | Mar 31, 2026 | |
| 15 | 1.56% | 3.52M | -507.93K decreased | -12.62% | Mar 31, 2026 | |
| 16 | 1.50% | 3.38M | -900.16K decreased | -21.03% | Mar 31, 2026 | |
| 17 | 1.15% | 2.60M | +40.92K increased | +1.60% | Mar 31, 2026 | |
| 18 | MASSACHUSETTS FINANCIAL SERVICES CO | 1.13% | 2.54M | +527.61K increased | +26.27% | Mar 31, 2026 |
| 19 | 0.84% | 1.90M | -3.64K decreased | -19.00% | Mar 31, 2026 | |
| 20 | 0.80% | 1.81M | +444.55K increased | +32.56% | Dec 31, 2025 |
Showing 20 of 120 filing-based institutional rows.
Recent insider transactions
Seagate Technology Holdings PLC (STX) Form 4 filings
| # | Insider | % company | Action | Shares | Price | Value | Filing date |
|---|---|---|---|---|---|---|---|
| 1 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 120 | $763.18 | $91,582 | May 20, 2026 |
| 2 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 14.00K | — | — | May 20, 2026 |
| 3 | MOSLEY, WILLIAM D Director, CEO | <0.01% | Award | 14.00K | $46.23 | $647,220 | May 20, 2026 |
| 4 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 120 | $742.01 | $89,041 | May 20, 2026 |
| 5 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 560 | $743.14 | $416,158 | May 20, 2026 |
| 6 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 840 | $744.52 | $625,394 | May 20, 2026 |
| 7 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 1.26K | $745.55 | $942,379 | May 20, 2026 |
| 8 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 1.46K | $746.53 | $1,092,177 | May 20, 2026 |
| 9 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 1.60K | $747.64 | $1,199,956 | May 20, 2026 |
| 10 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 1.72K | $748.53 | $1,286,722 | May 20, 2026 |
| 11 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 1.62K | $749.67 | $1,213,715 | May 20, 2026 |
| 12 | MOSLEY, WILLIAM D Director, CEO | <0.01% | D | 4.81K | $750.84 | $3,611,564 | May 20, 2026 |
Showing 12 of 120 filing-based insider rows. Percent of company uses current shares outstanding when available.
Frequently asked
Common questions.
Who are the largest STX shareholders?
TECHi's STX Holders page ranks the largest institutional shareholders of Seagate Technology Holdings PLC using filing-based market-data feeds.
What is institutional ownership of STX?
The Holders page shows institutional positions by share count and, when available, the latest filing change so readers can spot accumulation, reductions, initiated positions, and unchanged holdings.
Where can I see Seagate Technology Holdings PLC insider transactions?
Recent insider buys, sales, awards, gifts, and option exercises appear below the institutional holders table when Form 4 rows are available.