Stapley Marc Insider Trading Activity
Stapley Marc has been net-selling over the last 12 months with 0 purchases and 10 sales across 2 different companies.
GKOS is the most-traded position with 5 trades. The largest single transaction was a sale of VCYT for $953K on Mar 4, 2026.
Performance Scorecard
Forward stock performance after each transaction by Stapley Marc. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.
| PERIOD | AVG BUY RETURN | AVG SELL AVOIDED | SUCCESS RATE | TRADES |
|---|---|---|---|---|
| 30 days | — | +4.6% | 90% | 10 |
| 90 days | — | -5.3% | 70% | 10 |
| 120 days | — | -6.4% | 70% | 10 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | Δ OWNED | ROLE | FILING |
|---|---|---|---|---|---|---|---|---|
Mar 4, 2026 | VCYT | Sell | 19,244 | $35.56 | $684K | −4.8% | CEO | |
Mar 4, 2026 | VCYT | Sell | 26,279 | $36.28 | $953K | −6.8% | CEO | |
Jan 22, 2026 | GKOS | Sell | 3,812 | $126.07 | $481K | −7.3% | Director | |
Jan 22, 2026 | GKOS | Sell | 3,892 | $126.96 | $494K | −8.0% | Director | |
Jan 22, 2026 | GKOS | Sell | 1,671 | $127.92 | $214K | −3.7% | Director | |
Jan 22, 2026 | GKOS | Sell | 4,325 | $129.11 | $558K | −10.0% | Director | |
Jan 22, 2026 | GKOS | Sell | 1,300 | $129.78 | $169K | −3.4% | Director | |
Dec 4, 2025 | VCYT | Sell | 4,448 | $46.90 | $209K | −1.4% | CEO | |
Dec 4, 2025 | VCYT | Sell | 3,220 | $47.35 | $152K | −1.0% | CEO | |
Sep 4, 2025 | VCYT | Sell | 7,667 | $30.41 | $233K | −2.2% | CEO |
Top Companies Traded
Other insiders at GLAUKOS Corp
5 other tracked filers at GKOS.