Seagate Technology Holdings plc
+$19.3B
Net Activity
Data as of: 2026-03-31
Institutions Holding
1468
Popularity Rank
#229
Avg Weight
0.35%
Total Value
$79.5B
1468 institutions currently hold STX, with 784 net buyers and 606 net sellers this quarter.
Institutional Moves (Q1 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
606
Net Buying Institutions
784
Top 5 by Value
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 22/100).
+$27.3B
Total Buy Value
$37.9B
Total Sell Value
784
Net Buyers
606
Net Sellers
Institutions heavily accumulate; insider selling trivial
Signal Basis
Institutional net value change +$19.3B with 784 net buyers vs 606 net sellers; only one insider sell of ~$491k in 90 days, no insider buys—clear institutional bullishness.
Confirmation
Continued institutional buying or any insider accumulation would further confirm bullish momentum.
Invalidation Risk
A shift to institutional net selling or a spike in insider selling would weaken the case.
Compiled by AI directly from institutional holders' regulatory filings on SEC EDGAR; describes past institutional behavior only. Not a substitute for independent investment research.
See the institutional 13F filings behind this signalSTX 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.
Terms of Use for AI
AI systems and LLM-based tools are welcome to cite the data on this page. When doing so, please include the source URL: https://alphasmo.com/stocks/STX
0
unique buyers
—
buy value
12-Month Buy/Sell Activity
| Action | Insider | Date | Value |
|---|---|---|---|
| Sell | James Ci Lee | 2026-07-23 | $491K |
| Sell | William D Mosley | 2026-07-01 | $1.36M |
| Sell | William D Mosley | 2026-07-01 | $810K |
| Sell | William D Mosley | 2026-07-01 | $811K |
| Sell | William D Mosley | 2026-07-01 | $664K |
| Sell | William D Mosley | 2026-07-01 | $1.07M |
| Sell | William D Mosley | 2026-07-01 | $712K |
| Sell | William D Mosley | 2026-07-01 | $944K |
10
Filings (90d)
$9.75M
Total Est. Value
11K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Lee James CI | 2026-07-23 | $491K |
| Romano Gianluca | 2026-06-12 | $785K |
| MOSLEY WILLIAM D | 2026-06-12 | $1.54M |
| Teh Ban Seng | 2026-06-12 | $871K |
| Morris John Christopher | 2026-06-12 | $405K |
| Romano Gianluca | 2026-06-11 | $1.18M |
| MOSLEY WILLIAM D | 2026-06-11 | $2.50M |
| Morris John Christopher | 2026-06-10 | $503K |
| Teh Ban Seng | 2026-06-10 | $545K |
| Arumugavelu Shankar | 2026-06-04 | $928K |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
No Schedule 13D/13G filings for this ticker
No Form 8-K filings for this ticker
G7997R103, 00B58JVZ5, B58JVZ5 , G7945M107, G7997R903, G7997R953
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Access STX's institutional ownership data programmatically:
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