STX Stock: Insider Activity, Filings & Research
Drillr aggregates AI research, SEC filings, earnings signals and alt-data for STX. 1 published article.
Insider Activity
Over the trailing 90-day window, STX insiders engaged in net selling of $96.9M across 125 open-market sales with no offsetting purchases, resulting in an insider sentiment score of 0/100. Notable transactions included CEO William D. Mosley selling $10.0M on 2026-03-23 and $3.6M on 2026-05-21, alongside EVP & Chief Commercial Officer Teh Ban Seng's $6.5M sale on 2026-05-14. Despite the consistent insider selling activity, the stock appreciated 159.1% during this period, and institutional investors showed an accumulating posture in 13F filings, suggesting divergent views between insiders and institutional buyers.
Updated Jun 4, 2026 · based on SEC Form 4 filings · not investment advice
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 320 | $916.77 |
| Jun 2, 2026 | Conyers Yolanda Leedirector | Sell | 750 | $885.33 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 853 | $909.18 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 480 | $918.75 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 1,598 | $922.95 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 273 | $938.82 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 360 | $924.88 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 813 | $898.41 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 779 | $903.78 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 871 | $925.87 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 440 | $934.17 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 640 | $889.94 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 1,807 | $921.75 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 860 | $901.56 |
| Jun 2, 2026 | MOSLEY WILLIAM Ddirector, officer: CEO | Sell | 740 | $905.76 |
Source: STX SEC Form 4 filings, latest Jun 2, 2026. For informational purposes only — not investment advice.
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