Brosius Mark Insider Trading Activity
Brosius Mark has been net-selling over the last 12 months with 0 purchases and 13 sales across 1 company.
ISRG is the most-traded position with 13 trades. The largest single transaction was a sale of ISRG for $2.5M on Dec 12, 2025.
Performance Scorecard
Forward stock performance after each transaction by Brosius Mark. 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 | — | +3.8% | 92% | 13 |
| 90 days | — | +15.5% | 100% | 13 |
| 120 days | — | +18.0% | 100% | 8 |
Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.
Price & Trades
Pro: Trade MarkersISRG · INTUITIVE SURGICAL INC
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| DATE | TICKER | TYPE | SHARES | PRICE | VALUE | ROLE |
|---|---|---|---|---|---|---|
| May 22, 2026 | ISRG | Sell | 18 | $439.80 | $8K | VP |
| May 21, 2026 | ISRG | Sell | 18 | $446.04 | $8K | VP |
| May 20, 2026 | ISRG | Sell | 18 | $440.38 | $8K | VP |
| May 19, 2026 | ISRG | Sell | 18 | $440.70 | $8K | VP |
| May 18, 2026 | ISRG | Sell | 18 | $422.47 | $8K | VP |
| Mar 9, 2026 | ISRG | Sell | 645 | $485.01 | $313K | VP |
| Mar 6, 2026 | ISRG | Sell | 648 | $490.19 | $318K | VP |
| Mar 5, 2026 | ISRG | Sell | 648 | $495.20 | $321K | VP |
| Mar 4, 2026 | ISRG | Sell | 2,362 | $498.68 | $1.2M | VP |
| Mar 3, 2026 | ISRG | Sell | 648 | $488.10 | $316K | VP |
| Dec 15, 2025 | ISRG | Sell | 464 | $548.49 | $254K | See Remarks |
| Dec 15, 2025 | ISRG | Sell | 464 | $548.49 | $254K | VP |
| Dec 12, 2025 | ISRG | Sell | 4,500 | $547.36 | $2.5M | VP |
| Jun 6, 2025 | ISRG | Sell | 216 | $563.11 | $122K | VP |
| Jun 5, 2025 | ISRG | Sell | 215 | $560.70 | $121K | VP |
| Jun 4, 2025 | ISRG | Sell | 215 | $552.07 | $119K | VP |
| Jun 3, 2025 | ISRG | Sell | 215 | $550.68 | $118K | VP |
| Jun 2, 2025 | ISRG | Sell | 215 | $549.06 | $118K | VP |
Top Companies Traded
| TICKER | COMPANY | TRADES | TOTAL VOLUME |
|---|---|---|---|
| ISRG | INTUITIVE SURGICAL INC | 18 | $6.1M |
Other insiders at INTUITIVE SURGICAL INC
5 other tracked filers at ISRG.