Martin J. Vanderploeg
CIK 1014008 · View on SEC EDGAR ↗
First SEC filing: June 3, 2026 · Latest: June 3, 2026
On this page
- Insider at Companies where this person is a reporting insider.
- Insider transactions Every share this person bought or sold, from Form 4 filings.
- Derivatives Options and other derivative holdings reported by this person.
- Initial holdings The stakes this person held when they first started reporting.
- Compensation Executive pay disclosed in company proxy statements.
Insider at
Insider transactions
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 18, 2026 | WK | G | 2,780 | — | — | 437,105 Indirect | -0.63% | Disposed | (price as of 2026-08-21) |
| June 1, 2026 | WK | A | 4,070 | — | — | 292,275 Direct | +1.41% | Acquired | (price as of 2026-08-21) |
| June 1, 2026 | WK | F | 28,942 | $52.83 | $1,529,006 | 288,205 Direct | -9.13% | Disposed | 39.4% (price as of 2026-08-21) |
| Feb. 1, 2026 | WK | F | 560 | $77.02 | $43,131 | 317,147 Direct | -0.18% | Disposed | -4.4% (price as of 2026-08-21) |
| Jan. 21, 2026 | WK | G | 491,270 | — | — | 1,201,832 Indirect | +69.14% | Acquired | (price as of 2026-08-21) |
| Jan. 21, 2026 | WK | G | 491,270 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-21) |
| Nov. 5, 2020 | WK | C | 50,000 | — | — | 2,154,023 Indirect | -2.27% | Disposed | (price as of 2026-08-21) |
| Nov. 5, 2020 | WK | C | 50,000 | — | — | 50,000 Indirect | — | Acquired | (price as of 2026-08-21) |
| Feb. 6, 2017 | WK | F | 16,409 | $12.85 | $210,856 | 263,410 Direct | -5.86% | Disposed | 473.0% (price as of 2026-08-21) |
| Feb. 1, 2017 | WK | A | 200,204 | — | — | 200,204 Direct | — | Acquired | (price as of 2026-08-21) |
| Jan. 18, 2017 | WK | A | 93,328 | — | — | 279,819 Direct | +50.04% | Acquired | (price as of 2026-08-21) |
| Nov. 14, 2016 | WK | C | 75,000 | — | — | 2,639,248 Indirect | -2.76% | Disposed | (price as of 2026-08-21) |
| Nov. 14, 2016 | WK | C | 75,000 | — | — | 350,000 Indirect | +27.27% | Acquired | (price as of 2026-08-21) |
| May 12, 2016 | WK | C | 240,217 | — | — | 2,714,248 Indirect | -8.13% | Disposed | (price as of 2026-08-21) |
| May 12, 2016 | WK | C | 240,217 | — | — | 275,000 Indirect | +690.62% | Acquired | (price as of 2026-08-21) |
| Feb. 25, 2016 | WK | G | 34,783 | — | — | 34,783 Indirect | — | Acquired | (price as of 2026-08-21) |
| Feb. 25, 2016 | WK | G | 34,783 | — | — | 186,491 Direct | -15.72% | Disposed | (price as of 2026-08-21) |
| Feb. 5, 2016 | WK | F | 18,550 | $12.41 | $230,206 | 221,274 Direct | -7.73% | Disposed | 493.4% (price as of 2026-08-21) |
| Jan. 19, 2016 | WK | A | 79,824 | — | — | 239,824 Direct | +49.89% | Acquired | (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| Jan. 21, 2026 | WK | Class B Common Stock [F2] | Class A Common Stock (491,270) | — | — | 491,270 | Acquired |
| Jan. 21, 2026 | WK | Class B Common Stock [F2] | Class A Common Stock (491,270) | — | — | 491,270 | Disposed |
| Nov. 5, 2020 | WK | Class B Common Stock [F1] | Class A Common Stock (50,000) | — | — | 50,000 | Disposed |
| Feb. 1, 2017 | WK | Employee Stock Option to Purchase Class A Common Stock [F1] | Class A Common Stock (200,204) | $12.40 | Feb. 1, 2027 | 200,204 | Acquired |
| Nov. 14, 2016 | WK | Class B Common Stock [F2] | Class A Common Stock (75,000) | — | — | 75,000 | Disposed |
| May 12, 2016 | WK | Class B Common Stock [F2] | Class A Common Stock (240,217) | — | — | 240,217 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 3 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Dec. 10, 2014 | WK | Employee Stock Option to Purchase Class A Common Stock [F1]→ Class A Common Stock (178,200) | 178,200 | Direct |
| Dec. 10, 2014 | WK | Class B Common Stock [F3]→ Class A Common Stock (3,979,705) | 3,979,705 | Indirect |
| Dec. 10, 2014 | WK | Class B Common Stock [F3]→ Class A Common Stock (889,020) | 889,020 | Indirect |
Compensation (DEF 14A)
Matched by name from proxy statements (DEF 14A) — verify against the filing.
| Fiscal year | Salary | Bonus | Stock awards | Option awards | Non-equity incentive | Pension change | Other | Total |
|---|---|---|---|---|---|---|---|---|
| 2023 | $172,500 | — | $6,464,946 | — | — | — | $1,601,202 | $8,238,648 |
| 2022 | $690,000 | — | $6,250,049 | — | $734,333 | — | $39,515 | $7,713,897 |
| 2021 | $690,000 | — | $7,760,034 | — | $1,293,750 | — | $47,486 | $9,791,270 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.