Seagate Technology Holdings plc
$808.54-1%
+$126.6B
Net Activity
+159.31% total shares
Institutions Holding
1987
Popularity Rank
#144
Avg Weight
0.51%
Total Value
$206.4B
Market Cap
$185.2B
1987 institutions currently hold STX, with 1218 net buyers and 683 net sellers this quarter.
Institutional Moves (Q2 2026)
Majority Increased
Based on recent trading activity
Net Selling Institutions
683
Net Buying Institutions
1218
Top 5 by Value
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Across its top 20 institutional holders, STX's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 7/100, avg. turnover score 38/100).
STX ranks #144 out of 37501 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
STX is a top-conviction position for Trivest Advisors Ltd — at 22.4% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in STX belongs to BlackRock, Inc., but the position matters far more to Trivest Advisors Ltd, who has 22.4% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
BlackRock has added to its STX position for two straight quarters, increasing it by $10.2B to reach $14.6B today.
Squarepoint Ops LLC has trimmed its STX position for two straight quarters, cutting it by $148.2M while still holding $225.3M.
STX is down 1% today, but institutions show net buying of $126.6B this quarter — a divergence between today's price move and the underlying institutional flow.
STX posted net income of $3.2B over the trailing twelve months, and currently trades at a P/E of 58.2.
+$40.5B
Total Buy Value
$30.4B
Total Sell Value
1218
Net Buyers
683
Net Sellers
STX
Q2 2026
Top 5 Institutional Movers
STX does not currently show a 13F-and-insider convergence signal — its insider confidence score is 0/100, below the threshold this product uses to flag combined buying pressure.
13F data as of 2026-06-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
0
unique buyers
—
buy value
12-Month Buy/Sell Activity
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | James Ci Lee | 2026-08-24 | $31K |
| Sell | James Ci Lee | 2026-08-24 | $87K |
| Sell | James Ci Lee | 2026-08-24 | $6K |
| Sell | James Ci Lee | 2026-08-24 | $62K |
| Sell | James Ci Lee | 2026-08-24 | $125K |
| Sell | James Ci Lee | 2026-08-24 | $219K |
| Sell | James Ci Lee | 2026-08-24 | $219K |
| Sell | James Ci Lee | 2026-08-24 | $94K |
| Action | Member | Trade Date | Amount |
|---|---|---|---|
| Buy | Alan Armstrong Senate | 2026-03-27 | $1K–$15K |
| Sell (Partial) | Ron L Wyden Senate | 2022-11-11 | $15K–$50K |
20
Filings (90d)
$86.33M
Total Est. Value
101K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| JAMES LEE | 2026-08-24 | $7.66M |
| Morris John Christopher | 2026-08-21 | $3.04M |
| Romano Gianluca | 2026-08-21 | $7.76M |
| Lee James CI | 2026-08-21 | $3.40M |
| BAN SENG TEH | 2026-08-21 | $8.41M |
| MOSLEY WILLIAM D | 2026-08-21 | $15.46M |
| BAN SENG TEH | 2026-08-20 | $5.10M |
| JOHN MORRIS | 2026-08-20 | $435K |
| BAN SENG TEH | 2026-08-13 | $6.78M |
| GIANLUCA ROMANO | 2026-08-07 | $18.94M |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
0
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Sanders Capital, LLC | 13G/A | 2026-08-05 | 1.6% |
| Vanguard Portfolio Management | 13G/A | 2026-07-31 | 3.6% |
1
Filings (14d)
Seagate Technology Holdings plc (ticker: STX) issued a press release on July 28, 2026, reporting financial results for its fiscal fourth quarter and full year ended July 3, 2026. The release was furnished under Items 2.02 and 7.01 of Form 8-K, meaning it is not deemed “filed” for liability purposes under securities laws. The full press release is attached as Exhibit 99.1.
View Full Filing (SEC EDGAR)G7997R103, 00B58JVZ5, B58JVZ5 , G7945M107, G7997R903, G7997R953
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114
Articles
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Seagate's YTD Gains are Double the Industry: Is the Stock Still a Buy?
Seagate's YTD Gains are Double the Industry: Is the Stock Still a Buy?
Access STX's institutional ownership data programmatically:
REST API
curl https://alphasmo.com/api/v1/market/stock/STXCLI
npx alphasmo stocks get STX