Insider trades › Mark Brosius
Mark Brosius
A corporate insider: an officer, director or owner of more than 10% of a company. Insiders report their trades to the SEC on Form 4The form insiders use to report each purchase or sale of their company's stock. It is due within two business days of the trade. · Last filing Nov 2, 2026
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Using 13F.ai, list Mark Brosius's open-market buys and sells across companies in the last two years, with the Form 4 links.
Using 13F.ai, how did the stocks Mark Brosius bought perform after the purchase compared with the S&P 500?
Using 13F.ai, are other insiders at the same companies buying or selling at the same time as Mark Brosius?
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Buying and selling by quarter
Dollars bought and sold on the open market over the last two years.
Bought Sold
By trade date, using the shares and price reported for each trade. Stock grants, option exercises and shares withheld for tax are left out.
Roles
The companies where this person reports as an insider, and their position at each, most recent first.
| Company | Role | Last filed |
|---|---|---|
| ISRG Intuitive Surgical, Inc. | EVP & Chief Mfg and Supply Cha | Nov 2, 2026 |
Roles come from the filings themselves and can change over time.
Latest open-market trades
Purchases and sales at every company, most recent filing first.
| How the stock has done since the trade date, measured against the S&P 500 over the same days. It describes the stock, not the trader's actual gain or loss. | Filing | ||||||
|---|---|---|---|---|---|---|---|
| Oct 30, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 63 | $453.60 | $28.6K | +2.9% | Form 4 ↗ |
| Oct 29, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 61 | $447.85 | $27.3K | +0.8% | Form 4 ↗ |
| Oct 28, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 61 | $441.60 | $26.9K | +2.2% | Form 4 ↗ |
| Oct 27, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 61 | $451.63 | $27.5K | +1.5% | Form 4 ↗ |
| Oct 26, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 61 | $451.75 | $27.6K | -0.3% | Form 4 ↗ |
| Sep 11, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 25 | $365.79 | $9,145 | +21.5% | Form 4 ↗ |
| Sep 10, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 23 | $347.66 | $7,996 | +23.5% | Form 4 ↗ |
| Sep 9, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 23 | $350.20 | $8,055 | +26.6% | Form 4 ↗ |
| Sep 8, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 46 | $361.23 | $16.6K | +28.2% | Form 4 ↗ |
| Aug 21, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 77 | $375.57 | $28.9K | +18.6% | Form 4 ↗ |
| Aug 20, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 77 | $396.37 | $30.5K | +19.5% | Form 4 ↗ |
| Aug 19, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 77 | $394.26 | $30.4K | +13.4% | Form 4 ↗ |
| Aug 18, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 77 | $394.00 | $30.3K | +15.1% | Form 4 ↗ |
| Aug 17, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 77 | $390.67 | $30.1K | +16.0% | Form 4 ↗ |
| Jul 31, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 28 | $351.00 | $9,828 | +24.6% | Form 4 ↗ |
| Jul 30, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 28 | $346.83 | $9,711 | +24.0% | Form 4 ↗ |
| Jul 29, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 28 | $360.21 | $10.1K | +22.2% | Form 4 ↗ |
| Jul 28, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 28 | $365.58 | $10.2K | +20.8% | Form 4 ↗ |
| Jul 27, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 28 | $344.00 | $9,632 | +22.2% | Form 4 ↗ |
| Jun 12, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 25 | $414.13 | $10.4K | +6.2% | Form 4 ↗ |
| Jun 11, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 23 | $412.16 | $9,480 | +5.2% | Form 4 ↗ |
| Jun 10, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 23 | $424.14 | $9,755 | +3.7% | Form 4 ↗ |
| Jun 9, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 23 | $421.13 | $9,686 | +1.6% | Form 4 ↗ |
| Jun 8, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 23 | $420.12 | $9,663 | +3.9% | Form 4 ↗ |
| May 22, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 18 | $439.80 | $7,916 | +0.1% | Form 4 ↗ |
| May 21, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 18 | $446.04 | $8,029 | -0.7% | Form 4 ↗ |
| May 20, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 18 | $440.38 | $7,927 | -3.0% | Form 4 ↗ |
| May 19, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 18 | $440.70 | $7,933 | -2.4% | Form 4 ↗ |
| May 18, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 18 | $422.47 | $7,604 | -1.3% | Form 4 ↗ |
| Mar 9, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 645 | $485.01 | $312.8K | -21.3% | Form 4 ↗ |
| Mar 6, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 648 | $490.19 | $317.6K | -21.7% | Form 4 ↗ |
| Mar 5, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 648 | $495.20 | $320.9K | -21.4% | Form 4 ↗ |
| Mar 4, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 2,362 | $498.68 | $1.2M | -21.6% | Form 4 ↗ |
| Mar 3, 2026 | ISRG Intuitive Surgical, Inc. | Sale | 648 | $488.10 | $316.3K | -21.7% | Form 4 ↗ |
| Dec 15, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 464 | $548.49 | $254.5K | -31.5% | Form 4 ↗ |
| Dec 12, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 312 | $547.36 | $170.8K | -28.9% | Form 4/A ↗ |
| Jun 6, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 216 | $563.11 | $121.6K | -46.3% | Form 4 ↗ |
| Jun 5, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 215 | $560.70 | $120.6K | -47.7% | Form 4 ↗ |
| Jun 4, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 215 | $552.07 | $118.7K | -47.1% | Form 4 ↗ |
| Jun 3, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 215 | $550.68 | $118.4K | -46.2% | Form 4 ↗ |
| Jun 2, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 215 | $549.06 | $118.0K | -47.1% | Form 4 ↗ |
| May 16, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 20 | $563.81 | $11.3K | -48.2% | Form 4 ↗ |
| May 15, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $560.00 | $12.3K | -48.6% | Form 4 ↗ |
| May 14, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $563.00 | $12.4K | -50.0% | Form 4 ↗ |
| May 13, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $561.67 | $12.4K | -49.9% | Form 4 ↗ |
| May 12, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $551.97 | $12.1K | -50.4% | Form 4 ↗ |
| Mar 7, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 489 | $533.18 | $260.7K | -45.4% | Form 4 ↗ |
| Mar 6, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 492 | $558.95 | $275.0K | -49.4% | Form 4 ↗ |
| Mar 5, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 492 | $554.17 | $272.7K | -51.3% | Form 4 ↗ |
| Mar 4, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 492 | $563.69 | $277.3K | -51.3% | Form 4 ↗ |
| Mar 3, 2025 | ISRG Intuitive Surgical, Inc. | Sale | 492 | $573.78 | $282.3K | -51.0% | Form 4 ↗ |
| Oct 28, 2024 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $513.66 | $11.3K | -43.0% | Form 4 ↗ |
| Oct 25, 2024 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $514.00 | $11.3K | -43.5% | Form 4 ↗ |
| Oct 24, 2024 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $510.79 | $11.2K | -43.5% | Form 4 ↗ |
| Oct 23, 2024 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $513.89 | $11.3K | -44.0% | Form 4 ↗ |
| Oct 22, 2024 | ISRG Intuitive Surgical, Inc. | Sale | 2,106 | $515.00 | $1.1M | -43.6% | Form 4 ↗ |
| Oct 22, 2024 | ISRG Intuitive Surgical, Inc. | Sale | 22 | $515.00 | $11.3K | -43.6% | Form 4 ↗ |
Each row links to its Form 4. Since trade compares the stock’s move from the close on the trade date (or the next trading day) to its latest close with the S&P 500 over the same days, adjusted for splits and excluding dividends. It describes the stock, not what the trader made: we don’t know their purchase price, position size or later sales. A dash means the trade isn’t matched to a listed stock, or there is no closing price after it yet.
When several people report on the same filing, we list it under the first one named, so trades by someone usually listed second may be missing here. Information, not investment advice: see the disclaimer.