Mark Partin is CFO at BLACKLINE, INC. (BL). They have made 41 open-market trades across 1 company since 2018, most recently 2026-05-28.
CIK 0001688366
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.
0 open-market purchases, against 41 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| BL | SELL · 10b5-1 | 2024-09-30 | 2024-10-01 | $54.84 | $9.4M | +3.5% | +2.3% | +11.5% |
| BL | SELL · 10b5-1 | 2024-09-27 | 2024-09-30 | $53.00 | $299K | -0.3% | +2.0% | +9.7% |
| BL | SELL · 10b5-1 | 2024-06-04 | 2024-06-06 | $47.38 | $4.7M | -5.3% | +4.8% | +5.2% |
| BL | SELL | 2023-05-01 | 2023-05-01 | $55.42 | $277K | -3.2% | -5.9% | +5.0% |
| BL | SELL | 2023-04-03 | 2023-04-03 | $64.66 | $1.3M | -2.8% | -19.8% | -16.5% |
| BL | SELL | 2023-03-02 | 2023-03-02 | $70.00 | $350K | -10.9% | -8.5% | -26.1% |
| BL | SELL | 2023-03-01 | 2023-03-01 | $69.17 | $1.3M | -9.6% | -2.1% | -27.1% |
| BL | SELL | 2023-02-21 | 2023-02-22 | $70.87 | $2.1M | -5.4% | -12.6% | -27.9% |
| BL | SELL | 2021-12-10 | 2021-12-10 | $105.75 | $983K | -0.9% | -7.3% | -33.0% |
| BL | SELL | 2021-11-10 | 2021-11-10 | $128.93 | $3.2M | -9.7% | -17.5% | -30.7% |
| BL | SELL | 2021-10-14 | 2021-10-18 | $125.43 | $1.9M | -0.4% | -2.7% | -30.4% |
| BL | SELL | 2021-10-11 | 2021-10-12 | $117.82 | $1.1M | +3.3% | +3.8% | -19.5% |
| BL | SELL | 2021-09-23 | 2021-09-27 | $125.81 | $1.3M | -0.8% | +2.0% | -12.7% |
| BL | SELL | 2021-09-17 | 2021-09-20 | $125.54 | $206K | -2.7% | +3.2% | -15.8% |
| BL | SELL | 2021-09-10 | 2021-09-10 | $120.43 | $961K | +1.9% | -3.1% | -11.7% |
| BL | SELL | 2021-08-10 | 2021-08-11 | $112.64 | $1.0M | -2.1% | +8.2% | +17.9% |
| BL | SELL | 2021-07-12 | 2021-07-12 | $113.41 | $1.1M | +1.3% | -1.3% | +3.1% |
| BL | SELL | 2021-06-10 | 2021-06-10 | $103.79 | $1.0M | +5.2% | +9.3% | +17.9% |
| BL | SELL | 2021-05-10 | 2021-05-12 | $104.27 | $980K | +1.1% | +3.3% | +9.1% |
| BL | SELL | 2020-08-03 | 2020-08-03 | $90.17 | $3.6M | -17.0% | +2.7% | +7.9% |
| BL | SELL | 2020-07-01 | 2020-07-06 | $86.30 | $6.3M | -3.7% | +6.3% | +1.1% |
| BL | SELL | 2020-06-18 | 2020-06-22 | $80.90 | $1.6M | +6.8% | +6.0% | +3.7% |
| BL | SELL | 2020-06-01 | 2020-06-03 | $78.24 | $4.4M | -2.8% | +12.3% | +16.2% |
| BL | SELL | 2020-05-26 | 2020-05-28 | $70.00 | $700K | +6.1% | +15.3% | +9.5% |
| BL | SELL | 2020-05-18 | 2020-05-20 | $65.01 | $494K | +15.4% | +18.2% | +14.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.