Seagate Technology Holdings plc
Seagate Technology Holdings plc (STX) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · STX · as of Sep 30, 2024
Ownership Breakdown
866
Institutional Holders
▲ 23 vs Q2
$20.34B
Total Inst. Value
▲ $1.12B vs Q2
224.23M
Shares Outstanding
freeFloat 99.67%
185.88M
13F Shares Held
▼ 262,161 vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
STX largest shareholders · institutional ownership
Q3 2024 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC computer storage devices | 26.16M | 12.40% | 12.40% | $2.87T | Nov 13, 2024 | ▲ 958.9K |
JPMORGAN CHASE & CO computer storage devices | 22.65M | 10.74% | 10.74% | $2.48T | Dec 26, 2024 | ▼ 396.1K |
SANDERS CAPITAL, LLC computer storage devices | 16.37M | 7.76% | 7.76% | $1.79T | Nov 13, 2024 | ▲ 150.1K |
BLACKROCK, INC. computer storage devices | 13.91M | 6.59% | 6.59% | $1.52T | Nov 13, 2024 | NEW |
CAPITAL RESEARCH GLOBAL INVESTORS computer storage devices | 9.98M | 4.73% | 4.73% | $1.09T | Nov 13, 2024 | ▼ 4.10M |
STATE STREET CORP computer storage devices | 8.50M | 4.03% | 4.03% | $937.08B | Nov 14, 2024 | ▲ 541.6K |
FMR LLC computer storage devices | 8.47M | 4.02% | 4.02% | $927.92B | Nov 13, 2024 | ▼ 1.58M |
BANK OF AMERICA CORP /DE/ computer storage devices | 4.59M | 2.17% | 2.17% | $502.25B | Nov 14, 2024 | ▲ 386.9K |
MORGAN STANLEY computer storage devices | 4.40M | 2.09% | 2.09% | $482.36B | May 14, 2025 | ▼ 299.8K |
GEODE CAPITAL MANAGEMENT, LLC computer storage devices | 4.16M | 1.97% | 1.97% | $454.48B | Nov 12, 2024 | ▲ 318.4K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2024 vs prior quarter
Q3 2024
29
Increased
+8.43M shares2
New Positions
first time holders17
Decreased
−8.42M shares0
Sold Out
fully exitedNet shares change (top 50)
+10.0K
+8.43M / −8.42M
Net new holders
+14
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
STX insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
6
Buy transactions
170
Sell transactions
0.04
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Arumugavelu Shankar director | Jun 4, 2026 | Sale | 1,000 | $927.68 | $927.7K | 6.6K | Form 4 ↗ |
BHATT PRAT director | Jun 2, 2026 | Sale | 1,000 | $929.88 | $929.9K | 12.9K | Form 4 ↗ |
Conyers Yolanda Lee director | Jun 1, 2026 | Sale | 750 | $885.33 | $664.0K | 4.1K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 320 | $916.77 | $293.4K | 337.1K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 480 | $918.75 | $441.0K | 336.6K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 1,691 | $919.62 | $1.56M | 334.9K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 1,730 | $920.90 | $1.59M | 333.1K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 1,807 | $921.75 | $1.67M | 331.3K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 1,598 | $922.95 | $1.47M | 329.7K | Form 4 ↗ |
MOSLEY WILLIAM D CEO | Jun 1, 2026 | Sale | 480 | $923.58 | $443.3K | 329.3K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Seagate Technology Holdings plc (STX) is primarily owned by institutional investors, who hold approximately 82.9% of total shares outstanding. Company insiders own approximately 0.33%, while retail and public investors account for the remaining 16.77%.
The largest institutional shareholder of Seagate Technology Holdings plc is VANGUARD GROUP INC, holding approximately 26.16 million shares — equal to 12.40% of outstanding shares — as of September 30, 2024.
A total of 866 institutional investors currently hold STX stock, with a combined institutional value of approximately $20.34 billion as of the most recent 13F filing period.
Frequently asked questions
STX ownershipSeagate Technology Holdings plc (STX) is primarily owned by institutional investors, who hold approximately 82.9% of shares. The largest shareholder is VANGUARD GROUP INC with a 12.40% stake. Company insiders hold 0.33%. Data sourced from SEC Form 13F as of September 30, 2024.