Martin J. Vanderploeg is CEO & President at WORKIVA INC (WK). They have made 14 open-market trades across 1 company since 2020, most recently 2026-08-18.
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.
3 open-market purchases totalling $1.5M since 2024, against 11 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| WK | 437,105 | $32.9M |
Shares reported on the most recent Form 4, priced at the 2026-08-20 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WK | BUY | 2024-09-11 | 2024-09-13 | $70.06 | $560K | +3.7% | +6.9% | +39.5% |
| WK | BUY | 2024-08-16 | 2024-08-19 | $78.91 | $316K | -0.2% | -2.5% | +14.5% |
| WK | BUY | 2024-08-09 | 2024-08-13 | $74.97 | $578K | +3.4% | -7.9% | +22.5% |
| WK | SELL | 2021-11-16 | 2021-11-18 | $151.00 | $90.5M | -8.8% | -9.2% | -16.7% |
| WK | SELL | 2021-10-18 | 2021-10-20 | $144.50 | $9.5M | +4.2% | -2.8% | -23.2% |
| WK | SELL | 2021-09-20 | 2021-09-22 | $146.90 | $10.2M | -8.1% | +0.5% | -9.6% |
| WK | SELL | 2021-08-18 | 2021-08-20 | $134.31 | $7.6M | +4.0% | +6.6% | +2.0% |
| WK | SELL | 2021-08-09 | 2021-08-11 | $127.50 | $181.9M | +3.9% | +8.6% | +22.0% |
| WK | SELL | 2021-07-19 | 2021-07-21 | $122.62 | $8.2M | +1.2% | +6.7% | +15.6% |
| WK | SELL | 2021-06-18 | 2021-06-22 | $108.57 | $7.5M | +2.6% | +13.3% | +29.8% |
| WK | SELL | 2020-12-21 | 2020-12-22 | $88.82 | $4.4M | -0.1% | +8.4% | +1.9% |
| WK | SELL | 2020-11-23 | 2020-11-24 | $73.62 | $3.7M | +5.2% | +25.2% | +44.8% |
| WK | SELL | 2020-10-21 | 2020-10-23 | $55.25 | $2.8M | +2.7% | +31.6% | +80.5% |
| WK | SELL | 2020-09-21 | 2020-09-23 | $56.60 | $2.8M | +4.0% | +4.2% | +71.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.