Zhenya Lindgardt is CEO at SERA PROGNOSTICS, INC. (SERA). They have made 23 open-market trades across 1 company since 2024, most recently 2026-09-10.
CIK 0001891299
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 23 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| SERA | 837,848 | $1.7M |
Shares reported on the most recent Form 4, priced at the 2026-09-11 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 |
|---|---|---|---|---|---|---|---|---|
| SERA | SELL | 2026-09-10 | 2026-09-11 | $2.00 | $14K | +6.1% | +0.7% | — |
| SERA | SELL | 2026-09-08 | 2026-09-09 | $2.00 | $40K | +7.2% | +0.0% | — |
| SERA | SELL | 2026-06-11 | 2026-06-15 | $2.01 | $14K | -1.9% | +18.8% | +9.9% |
| SERA | SELL | 2026-06-09 | 2026-06-10 | $2.08 | $43K | -4.2% | +9.4% | +5.7% |
| SERA | SELL | 2026-03-10 | 2026-03-12 | $1.92 | $49K | +1.0% | +9.5% | -0.5% |
| SERA | SELL | 2025-12-10 | 2025-12-11 | $3.31 | $14K | +4.2% | +4.4% | -44.0% |
| SERA | SELL | 2025-12-09 | 2025-12-10 | $3.04 | $172K | +7.1% | +9.8% | -45.5% |
| SERA | SELL | 2025-11-10 | 2025-11-12 | $2.62 | $30K | +8.7% | +12.9% | -14.8% |
| SERA | SELL | 2025-09-11 | 2025-09-12 | $3.13 | $10K | -3.1% | -3.8% | +6.6% |
| SERA | SELL | 2025-09-09 | 2025-09-09 | $3.15 | $133K | +8.6% | +5.3% | +0.3% |
| SERA | SELL | 2025-08-08 | 2025-08-11 | $2.54 | $22K | +3.0% | +32.9% | +10.4% |
| SERA | SELL | 2025-06-09 | 2025-06-11 | $1.44 | $38K | +35.3% | +89.3% | +106.7% |
| SERA | SELL | 2025-05-08 | 2025-05-09 | $2.44 | $23K | -16.5% | -34.8% | +13.0% |
| SERA | SELL | 2025-03-07 | 2025-03-10 | $4.12 | $245K | -5.1% | -16.4% | -63.8% |
| SERA | SELL | 2025-02-12 | 2025-02-14 | $4.58 | $129K | +1.7% | +2.7% | -40.8% |
| SERA | SELL | 2024-12-10 | 2024-12-12 | $7.41 | $389K | -6.9% | -25.9% | -49.8% |
| SERA | SELL | 2024-11-11 | 2024-11-12 | $7.32 | $88K | -11.1% | +16.0% | -39.5% |
| SERA | SELL | 2024-09-10 | 2024-09-10 | $7.57 | $380K | +0.8% | -12.9% | +4.5% |
| SERA | SELL | 2024-08-07 | 2024-08-08 | $7.42 | $183K | -3.7% | -0.3% | +19.4% |
| SERA | SELL | 2024-06-10 | 2024-06-11 | $8.11 | $436K | -22.4% | -25.6% | -12.6% |
| SERA | SELL | 2024-05-08 | 2024-05-10 | $9.59 | $230K | -9.4% | -10.7% | -18.1% |
| SERA | SELL | 2024-03-26 | 2024-03-26 | $9.37 | $729K | +1.5% | +8.2% | -32.2% |
| SERA | SELL | 2024-02-06 | 2024-02-07 | $8.03 | $450K | +19.1% | +22.2% | +21.5% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.