Latest filingSep 03, 2026Most recent Form 4
STX
Seagate Technology Holdings plc
NasdaqTechnologyComputer Storage Devices
Insider activity for last month from 08/04 to 09/04. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$7.56B115 sells
Net open-market-$7.56B7 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period183transactions
- S · Open-market sells · dominant115 · 63%
- M · Option exercise44 · 24%
- A · Grants / awards24 · 13%
Activity by reported role
A joint filing can contribute to multiple roles314transactions
- EVP · dominant131 · 42%
- CCO58 · 18%
- CLO44 · 14%
- Chief executive officer41 · 13%
- CTO16 · 5%
- Chief financial officer13 · 4%
- EGO10 · 3%
- Director1 · 0%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (6)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeTeh Ban SengOrdinary Shares · Direct
10,800Aug 21, 2026
Lee James CIOrdinary Shares · Direct
347Aug 24, 2026
Mosley William DOrdinary Shares · Direct
295,327.5Sep 01, 2026
Morris John ChristopherOrdinary Shares · Direct
14,847.25Aug 21, 2026
Mosley William DRestricted Share Unit · Direct
1,584Aug 20, 2026
Romano GianlucaRestricted Share Unit · Direct
1,810Aug 20, 2026
Romano GianlucaOrdinary Shares · Direct
28,494Aug 21, 2026
Chong Kian FattRestricted Share Unit · Direct
1,036Aug 20, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 04 → Sep 04
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Top insiders
By absolute net value across the selected period- MD-$15.4M
- RG-$7.7M
- TS-$5.5M
- MC-$3.4M
- LC-$3.3M
Recent filing activity
Most recent 12 transactions · color = transaction codeFiling detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
STX transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 280 | -$23.5M | S | +3.6% | 08/24 | 08/21 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 88 | -$7.37M | S | +3.6% | 08/24 | 08/21 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 89 | -$7.45M | S | +3.6% | 08/24 | 08/21 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 80 | -$6.68M | S | +3.6% | 08/24 | 08/21 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 610 | -$52.0M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 630 | -$53.6M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 280 | -$23.8M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 400 | -$33.9M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 160 | -$13.5M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 320 | -$27.0M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 926 | -$78.2M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 40 | -$3.37M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 120 | -$10.1M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 160 | -$13.4M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 80 | -$6.71M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 120 | -$10.0M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 440 | -$36.8M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 682 | -$56.9M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 240 | -$20.0M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 280 | -$23.3M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 240 | -$19.9M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 80 | -$6.64M | S | +3.6% | 08/24 | 08/20 | |
| STX | Teh Ban Seng | EVPCCO | sale10b5-1 | 240 | -$19.9M | S | +3.6% | 08/24 | 08/20 | |
| STX | Morris John Christopher | EVPCTO | sale10b5-1 | 523 | -$43.6M | S | +3.6% | 08/24 | 08/20 | |
| STX | Morris John Christopher | EVPCTO | sale10b5-1 | 609 | -$51.6M | S | +3.6% | 08/24 | 08/21 | |
| STX | Morris John Christopher | EVPCTO | sale10b5-1 | 2.02k | -$172M | S | +3.6% | 08/24 | 08/21 | |
| STX | Morris John Christopher | EVPCTO | sale10b5-1 | 879 | -$74.6M | S | +3.6% | 08/24 | 08/21 | |
| STX | Lee James CI | EVPCLO | sale | 2.51k | -$213M | S | +3.6% | 08/24 | 08/21 | |
| STX | Lee James CI | EVPCLO | sale | 755 | -$64.1M | S | +3.6% | 08/24 | 08/21 | |
| STX | Lee James CI | EVPCLO | sale | 668 | -$56.7M | S | +3.6% | 08/24 | 08/21 | |
| STX | Romano Gianluca | EVPCFO | sale | 1.47k | -$124M | S | +3.6% | 08/24 | 08/21 | |
| STX | Romano Gianluca | EVPCFO | sale | 4.90k | -$416M | S | +3.6% | 08/24 | 08/21 | |
| STX | Romano Gianluca | EVPCFO | sale | 2.70k | -$229M | S | +3.6% | 08/24 | 08/21 | |
| STX | MOSLEY WILLIAM D | CEO | sale | 3.39k | -$288M | S | +3.6% | 08/24 | 08/21 | |
| STX | MOSLEY WILLIAM D | CEO | sale | 11.3k | -$960M | S | +3.6% | 08/24 | 08/21 | |
| STX | MOSLEY WILLIAM D | CEO | sale | 3.43k | -$291M | S | +3.6% | 08/24 | 08/21 |
Seagate Technology Holdings plc Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Seagate Technology Holdings plc?
MOSLEY WILLIAM D, Conyers Yolanda Lee, Lee James CI, Teh Ban Seng, Morris John Christopher, Chong Kian Fatt, Romano Gianluca.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Mosley William D reported a sale on Sep 01, 2026 valued at $6.65M. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $75,657,035.84. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.