Keith Valentine is COO at NUVASIVE INC (NUVA). They have made 7 open-market trades across 3 companies since 2006, most recently 2026-06-10.
CIK 0001289408
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.
6 open-market purchases totalling $3.0M since 2015, against 1 sale. Across 6 scored buys the stock is up 6.3% at ninety days, and 5.2 points ahead of the S&P over the same stretch.
6 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| OFIX | 377,741 | $3.6M |
| NUVA | 88,934 | $3.5M |
| SPNE | 340,967 | $3.3M |
| ATEC | 264,283 | $2.8M |
| SIBN | 57,209 | $1.1M |
| Total | $14.2M |
Shares reported on the most recent Form 4, priced at the 2026-06-12 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 50% | 67% | 50% |
| Avg Move | +0.6% | +8.2% | +6.3% |
| Alpha | +0.0% | +6.3% | +5.2% |
| Scored | 6 | 6 | 6 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ATEC | BUY | 2026-05-07 | 2026-05-11 | $7.38 | $996K | +10.6% | +9.1% | +27.6% |
| ATEC | BUY | 2024-08-02 | 2024-08-05 | $6.55 | $255K | -3.5% | +3.1% | +27.6% |
| SPNE | BUY | 2019-12-13 | 2019-12-13 | $11.12 | $445K | +8.3% | +38.9% | -22.1% |
| SPNE | BUY | 2016-11-18 | 2016-11-21 | $7.00 | $175K | +8.7% | +2.8% | -0.1% |
| SPNE | BUY | 2016-05-20 | 2016-05-24 | $10.16 | $102K | -2.9% | -3.1% | +6.9% |
| SPNE | BUY | 2015-08-18 | 2015-08-20 | $15.33 | $998K | -17.6% | -1.9% | -1.9% |
| NUVA | SELL · 10b5-1 | 2015-01-28 | 2015-01-29 | $46.96 | $327K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-12-19 | 2014-12-22 | $47.78 | $282K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-12-01 | 2014-12-02 | $43.66 | $109K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-11-19 | 2014-11-20 | $43.32 | $242K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-11-03 | 2014-11-04 | $40.61 | $102K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL | 2014-10-20 | 2014-10-21 | $34.96 | $31K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-10-02 | 2014-10-06 | $35.00 | $88K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-09-02 | 2014-09-03 | $35.14 | $88K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-08-01 | 2014-08-05 | $37.11 | $93K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-07-01 | 2014-07-02 | $35.65 | $89K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-06-20 | 2014-06-24 | $35.00 | $175K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-04-01 | 2014-04-03 | $38.41 | $96K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2014-01-16 | 2014-01-17 | $37.96 | $759K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2013-07-01 | 2013-07-03 | $25.00 | $42K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2011-01-21 | 2011-01-25 | $29.00 | $58K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2010-06-18 | 2010-06-22 | $40.34 | $202K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2010-05-21 | 2010-05-25 | $40.49 | $202K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2010-04-21 | 2010-04-22 | $42.08 | $210K | -5.9% | -1.8% | -1.8% |
| NUVA | SELL · 10b5-1 | 2010-03-18 | 2010-03-22 | $45.06 | $360K | -5.9% | -1.8% | -1.8% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.