Christopher Vanderhook is COO & 10% Owner at Viant Technology Inc. (DSP). They have made 6 open-market trades across 1 company since 2021, most recently 2026-07-23.
CIK 0001843104
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 6 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DSP | 4,304 | $54K |
Shares reported on the most recent Form 4, priced at the 2026-07-23 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 |
|---|---|---|---|---|---|---|---|---|
| DSP | SELL · 10b5-1 | 2026-07-21 | 2026-07-23 | $11.01 | $138K | +20.5% | +15.6% | — |
| DSP | SELL · 10b5-1 | 2026-06-16 | 2026-06-18 | $11.10 | $139K | +17.7% | +5.1% | +9.4% |
| DSP | SELL | 2026-06-15 | 2026-06-15 | $11.10 | $101K | +6.2% | +17.2% | +16.0% |
| DSP | SELL · 10b5-1 | 2026-05-19 | 2026-05-21 | $10.75 | $134K | +11.4% | -1.5% | +15.7% |
| DSP | SELL · 10b5-1 | 2026-04-20 | 2026-04-22 | $10.96 | $137K | +8.8% | +5.5% | +10.8% |
| DSP | SELL · 10b5-1 | 2026-03-17 | 2026-03-19 | $11.79 | $305K | -2.9% | -2.6% | -4.7% |
| DSP | SELL | 2026-02-17 | 2026-02-19 | $9.21 | $111K | +10.4% | +25.1% | +19.8% |
| DSP | SELL | 2026-01-20 | 2026-01-22 | $12.25 | $153K | -10.7% | -30.3% | -14.9% |
| DSP | SELL · 10b5-1 | 2025-12-19 | 2025-12-19 | $11.79 | $29K | -1.5% | +0.3% | -1.4% |
| DSP | SELL · 10b5-1 | 2025-12-17 | 2025-12-18 | $11.75 | $331K | +2.2% | +0.3% | +0.0% |
| DSP | SELL | 2025-09-15 | 2025-09-17 | $9.73 | $171K | -7.5% | -12.5% | +26.5% |
| DSP | SELL | 2025-06-13 | 2025-06-13 | $13.08 | $234K | +7.3% | +6.6% | -21.1% |
| DSP | SELL | 2021-02-10 | 2021-02-12 | $25.00 | $13.9M | -16.4% | -22.2% | -62.4% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.