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Seagate Technology Holdings plc (NASDAQ:STX)
SG · Delayed Price · Currency is USD
Technology · Computer Hardware
644.21+13.72 (+2.18%)
Insider Score
––Not scored
STX Insider Score
Insiders filed in the last 90 days, but none of those trades qualified for scoring — round-trip buys and filings whose price is far off the market are excluded.
STX Stock Insider Trading Activity
STX stock’s insider trading shows 27 sales on the open market for an estimated $15.59M by company insiders over the last 6 months.
Not enough price history.
Insider Trading Activity (Form 4 Filings)
An insider trade occurs when an individual that has non-public information about a company buys or sells shares of that company’s stock. Examples of insiders include a company’s executive officers (CEO, CFO, COO), its board of directors, and its major shareholders. Insiders are required to submit their trading activity to the SEC through Form 4 filings.
Scored window · last 90 days0 qualifying buys0 insiders$0 bought— these are the numbers in the rankings table; the full history below shows every filing (buys, sells and older activity).
| Insider | Action | Shares | Avg Cost | Total | Δ Holdings | Held After | Date | Grade | Form 4 |
|---|---|---|---|---|---|---|---|---|---|
| MOSLEY WILLIAM D CEO | Sell | 360 | $929.01 | $334.44K | 0.1% | 372,750 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 855 | $930.03 | $795.18K | 0.2% | 371,895 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 1,665 | $930.99 | $1.55M | 0.4% | 370,230 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 1,320 | $932.04 | $1.23M | 0.4% | 368,910 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 840 | $933.28 | $783.95K | 0.2% | 368,070 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 822 | $934.35 | $768.04K | 0.2% | 367,248 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 640 | $935.15 | $598.50K | 0.2% | 366,608 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 759 | $936.43 | $710.75K | 0.2% | 365,849 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 579 | $937.33 | $542.71K | 0.2% | 365,270 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 640 | $938.32 | $600.52K | 0.2% | 364,630 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 720 | $939.27 | $676.27K | 0.2% | 363,910 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 80 | $940.20 | $75.22K | 0.0% | 363,830 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 40 | $941.22 | $37.65K | 0.0% | 363,790 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 280 | $943.21 | $264.10K | 0.1% | 363,510 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 440 | $944.81 | $415.71K | 0.1% | 363,070 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 962 | $945.97 | $910.02K | 0.3% | 362,108 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Option exercise | 14,000 | $46.23 | $647.22K | 3.7% | 392,108 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 360 | $898.10 | $323.31K | 0.1% | 391,748 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 517 | $900.46 | $465.54K | 0.1% | 391,231 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 440 | $901.49 | $396.65K | 0.1% | 390,791 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 384 | $902.55 | $346.58K | 0.1% | 390,407 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 696 | $903.36 | $628.74K | 0.2% | 389,711 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 480 | $904.33 | $434.08K | 0.1% | 389,231 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 480 | $905.38 | $434.58K | 0.1% | 388,751 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 601 | $906.42 | $544.76K | 0.2% | 388,150 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 560 | $907.43 | $508.16K | 0.1% | 387,590 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 1,027 | $908.58 | $933.11K | 0.3% | 386,563 | Oct 1, 2026 | — | Form 4 |
| MOSLEY WILLIAM D CEO | Sell | 307 | $909.84 | $279.32K | 0.1% | 386,256 | Oct 1, 2026 | — | Form 4 |
What these mean— the action is the SEC’s own Form 4 transaction code. Only a buy or a sell is an open-market trade; the rest are transfers, awards and exercises, which is why they carry no price.
- Sell (S) — Open-market or private sale
- Option exercise (M) — Exercise or conversion of an exempt derivative
Disclaimer — Informational only — not investment advice. Insider transaction data is sourced from SEC Form 4 filings; market data from public feeds and may be delayed. The Insider Score is a proprietary score for research purposes and does not predict future performance. Always do your own research.