Nina S. Kjellson is Director at Tyra Biosciences, Inc. (TYRA). They have made 12 open-market trades across 6 companies since 2010, most recently 2025-02-05.
CIK 0001381980
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.
4 open-market purchases totalling $13.5M since 2010, against 8 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GKOS | 2,603,362 | $429.2M |
| CDTX | 1,356,813 | $300.4M |
| TSRO | 2,471,701 | $185.3M |
| TYRA | 443,885 | $8.2M |
| MKTO | 20,647 | $728K |
| TSPT | 1,983,884 | — |
| OCRX | 12,500 | — |
| TSRX | 1,576,814 | — |
| Total | $923.8M |
Shares reported on the most recent Form 4, priced at the 2025-02-07 close. 3 holdings could not be priced and are excluded from the total.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| TYRA | SELL | 2025-02-05 | 2025-02-07 | $13.76 | $74K | +0.3% | -20.3% | -21.0% |
| TYRA | SELL | 2025-01-23 | 2025-01-27 | $16.26 | $157K | -14.6% | -20.9% | -32.9% |
| TYRA | SELL | 2025-01-16 | 2025-01-21 | $16.36 | $798K | -7.9% | -18.6% | -42.3% |
| TYRA | SELL | 2024-11-25 | 2024-11-26 | $16.84 | $168K | +0.0% | -8.1% | -19.9% |
| TYRA | SELL | 2024-11-06 | 2024-11-08 | $17.22 | $2.5M | -0.9% | -0.1% | -17.8% |
| TYRA | SELL | 2024-11-04 | 2024-11-06 | $16.78 | $351K | -10.8% | -9.3% | -21.3% |
| TYRA | SELL | 2024-10-30 | 2024-11-01 | $16.45 | $4.3M | -7.8% | -7.1% | -13.9% |
| CDTX | BUY | 2015-04-20 | 2015-04-22 | $16.00 | $3.2M | -19.6% | +2.3% | +2.3% |
| MKTO | SELL | 2014-02-26 | 2014-02-28 | $40.39 | $1.3M | -20.2% | -1.4% | -1.4% |
| OCRX | BUY | 2013-07-15 | 2013-07-17 | $6.03 | $2.6M | N/A | N/A | N/A |
| TSPT | BUY | 2011-09-21 | 2011-09-23 | $7.24 | $1.6M | N/A | N/A | N/A |
| TSRX | BUY | 2010-08-06 | 2010-08-10 | $5.00 | $6.1M | N/A | N/A | N/A |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.