John L. Brottem is CLO at Outset Medical, Inc. (OM). They have made 49 open-market trades across 1 company since 2020, most recently 2026-09-14.
CIK 0001823381
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
1 open-market purchase totalling $68K since 2020, against 48 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| ALMR | 29,000 | $794K |
| OM | 87,475 | $392K |
| Total | $1.2M |
Shares reported on the most recent Form 4, priced at the 2026-09-16 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| OM | SELL | 2026-08-17 | 2026-08-18 | $4.39 | $12K | -6.8% | -26.0% | — |
| OM | SELL | 2026-05-15 | 2026-05-19 | $3.70 | $10K | +27.9% | +30.7% | +16.8% |
| OM | SELL | 2026-02-17 | 2026-02-19 | $3.35 | $10K | +0.3% | +4.6% | +26.5% |
| OM | SELL | 2026-01-20 | 2026-01-21 | $5.11 | $54K | -5.9% | -33.1% | -15.7% |
| OM | SELL | 2026-01-07 | 2026-01-08 | $4.27 | $956 | +9.7% | -1.9% | -12.9% |
| OM | SELL | 2025-11-17 | 2025-11-18 | $4.60 | $2K | -13.7% | -26.2% | -33.5% |
| OM | SELL | 2025-08-15 | 2025-08-18 | $12.88 | $5K | +1.4% | +1.5% | -64.2% |
| OM | SELL | 2025-05-15 | 2025-05-16 | $17.82 | $7K | -7.8% | +7.1% | -32.5% |
| OM | SELL | 2025-02-18 | 2025-02-19 | $0.90 | $6K | -30.9% | -30.7% | +34.5% |
| OM | SELL | 2025-01-21 | 2025-01-22 | $0.80 | $26K | +6.0% | +15.2% | -6.3% |
| OM | SELL | 2025-01-13 | 2025-01-13 | $0.81 | $17K | +6.3% | -2.5% | -7.8% |
| OM | SELL | 2025-01-07 | 2025-01-07 | $1.29 | $2K | -29.9% | -30.4% | -44.5% |
| OM | SELL | 2024-11-15 | 2024-11-18 | $0.80 | $3K | +31.4% | +49.6% | +33.1% |
| OM | SELL | 2024-08-15 | 2024-08-15 | $0.84 | $3K | -19.5% | -35.1% | +11.8% |
| OM | SELL | 2024-06-12 | 2024-06-14 | $4.78 | $101K | +8.7% | +10.5% | -88.2% |
| OM | SELL | 2024-05-16 | 2024-05-17 | $3.53 | $10K | -0.8% | +4.2% | -77.0% |
| OM | SELL | 2024-02-15 | 2024-02-16 | $3.57 | $12K | -6.3% | -40.5% | +4.8% |
| OM | SELL | 2024-01-16 | 2024-01-17 | $4.29 | $6K | -6.6% | -10.0% | -45.1% |
| OM | SELL | 2024-01-08 | 2024-01-08 | $5.49 | $40K | -31.3% | -39.7% | -51.8% |
| OM | SELL | 2023-11-16 | 2023-11-17 | $4.76 | $7K | +0.4% | +15.1% | -32.0% |
| OM | SELL | 2023-08-16 | 2023-08-17 | $15.10 | $21K | +3.4% | -10.6% | -62.3% |
| OM | SELL · 10b5-1 | 2023-07-19 | 2023-07-20 | $20.00 | $28K | +5.7% | -28.1% | -78.2% |
| OM | SELL · 10b5-1 | 2023-06-20 | 2023-06-21 | $21.97 | $31K | -4.0% | -10.5% | -42.5% |
| OM | SELL · 10b5-1 | 2023-05-16 | 2023-05-17 | $20.02 | $81K | +6.5% | +11.0% | -21.7% |
| OM | SELL · 10b5-1 | 2023-05-03 | 2023-05-05 | $20.00 | $28K | -1.5% | +5.9% | -14.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.