Christopher Vanderhook
Insider
First SEC filing: Feb. 9, 2021 · Latest: June 18, 2026
Insider at
Insider transactions
0 buys (P)
26 sells (S)
Net: $-1,319,989
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Sept. 10, 2026 | DSP | D | 8,636 | $12.74 | $110,023 | 285,244 Direct | -2.94% | Disposed | -3.9% (price as of 2026-10-02) |
| July 23, 2026 | DSP | S 10b5-1 | 4,304 | $10.47 | $45,063 | 0 Indirect | -100.00% | Disposed | 16.9% (price as of 2026-10-02) |
| July 22, 2026 | DSP | S 10b5-1 | 5,000 | $11.03 | $55,150 | 4,304 Indirect | -53.74% | Disposed | 11.0% (price as of 2026-10-02) |
| July 21, 2026 | DSP | A | 12,500 | · | · | 9,069,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| July 21, 2026 | DSP | S 10b5-1 | 3,196 | $11.70 | $37,393 | 9,304 Indirect | -25.57% | Disposed | 4.6% (price as of 2026-10-02) |
| July 21, 2026 | DSP | D | 12,500 | · | · | 9,069,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| July 21, 2026 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 18, 2026 | DSP | S 10b5-1 | 2,500 | $10.96 | $27,400 | 0 Indirect | -100.00% | Disposed | 11.7% (price as of 2026-10-02) |
| June 17, 2026 | DSP | S 10b5-1 | 5,000 | $11.09 | $55,450 | 2,500 Indirect | -66.67% | Disposed | 10.4% (price as of 2026-10-02) |
| June 16, 2026 | DSP | M | 12,500 | · | · | 9,082,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| June 16, 2026 | DSP | S 10b5-1 | 5,000 | $11.17 | $55,850 | 7,500 Indirect | -40.00% | Disposed | 9.6% (price as of 2026-10-02) |
| June 16, 2026 | DSP | D | 12,500 | · | · | 9,082,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| June 16, 2026 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 15, 2026 | DSP | S | 9,125 | $11.10 | $101,288 | 293,880 Direct | -3.01% | Disposed | 10.3% (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | G | 52,096 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 9, 2026 | DSP | A | 52,096 | · | · | 52,096 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 21, 2026 | DSP | S 10b5-1 | 2,500 | $10.79 | $26,975 | 0 Indirect | -100.00% | Disposed | 13.4% (price as of 2026-10-02) |
| May 20, 2026 | DSP | S 10b5-1 | 5,000 | $10.60 | $53,000 | 2,500 Indirect | -66.67% | Disposed | 15.5% (price as of 2026-10-02) |
| May 19, 2026 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 19, 2026 | DSP | D | 12,500 | · | · | 9,094,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| May 19, 2026 | DSP | S 10b5-1 | 5,000 | $10.89 | $54,450 | 7,500 Indirect | -40.00% | Disposed | 12.4% (price as of 2026-10-02) |
| May 19, 2026 | DSP | M | 12,500 | · | · | 9,094,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| April 22, 2026 | DSP | S 10b5-1 | 2,796 | $10.74 | $30,029 | 0 Indirect | -100.00% | Disposed | 14.0% (price as of 2026-10-02) |
| April 21, 2026 | DSP | S 10b5-1 | 4,704 | $10.91 | $51,321 | 2,796 Indirect | -62.72% | Disposed | 12.2% (price as of 2026-10-02) |
| April 20, 2026 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| April 20, 2026 | DSP | D | 12,500 | · | · | 9,107,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| April 20, 2026 | DSP | S 10b5-1 | 5,000 | $11.12 | $55,600 | 7,500 Indirect | -40.00% | Disposed | 10.1% (price as of 2026-10-02) |
| April 20, 2026 | DSP | M | 12,500 | · | · | 9,107,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| March 19, 2026 | DSP | S 10b5-1 | 2,920 | $11.42 | $33,346 | 0 Indirect | -100.00% | Disposed | 7.2% (price as of 2026-10-02) |
| March 18, 2026 | DSP | S 10b5-1 | 5,000 | $12.00 | $60,000 | 2,920 Indirect | -63.13% | Disposed | 2.0% (price as of 2026-10-02) |
| March 17, 2026 | DSP | M | 12,500 | · | · | 12,920 Indirect | +2976.19% | Acquired | (price as of 2026-10-02) |
| March 17, 2026 | DSP | D | 12,500 | · | · | 9,119,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| March 17, 2026 | DSP | S 10b5-1 | 5,000 | $11.80 | $59,000 | 7,920 Indirect | -38.70% | Disposed | 3.7% (price as of 2026-10-02) |
| March 17, 2026 | DSP | M | 12,500 | · | · | 9,119,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| March 10, 2026 | DSP | D | 44,177 | $10.50 | $463,858 | 303,005 Direct | -12.72% | Disposed | 16.6% (price as of 2026-10-02) |
| Feb. 19, 2026 | DSP | S 10b5-1 | 3,279 | $9.17 | $30,068 | 420 Indirect | -88.65% | Disposed | 33.5% (price as of 2026-10-02) |
| Feb. 18, 2026 | DSP | S 10b5-1 | 4,722 | $9.19 | $43,395 | 3,699 Indirect | -56.07% | Disposed | 33.2% (price as of 2026-10-02) |
| Feb. 17, 2026 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| Feb. 17, 2026 | DSP | D | 12,500 | · | · | 9,132,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| Feb. 17, 2026 | DSP | S 10b5-1 | 4,079 | $9.26 | $37,772 | 8,421 Indirect | -32.63% | Disposed | 32.2% (price as of 2026-10-02) |
| Feb. 17, 2026 | DSP | M | 12,500 | · | · | 9,132,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| Jan. 22, 2026 | DSP | S 10b5-1 | 2,574 | $12.87 | $33,127 | 0 Indirect | -100.00% | Disposed | -4.9% (price as of 2026-10-02) |
| Jan. 21, 2026 | DSP | S 10b5-1 | 4,926 | $12.24 | $60,294 | 2,574 Indirect | -65.68% | Disposed | 0.0% (price as of 2026-10-02) |
| Jan. 20, 2026 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| Jan. 20, 2026 | DSP | D | 12,500 | · | · | 9,144,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| Jan. 20, 2026 | DSP | S 10b5-1 | 5,000 | $11.94 | $59,700 | 7,500 Indirect | -40.00% | Disposed | 2.5% (price as of 2026-10-02) |
| Jan. 20, 2026 | DSP | M | 12,500 | · | · | 9,144,775 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| Dec. 19, 2025 | DSP | S 10b5-1 | 2,500 | $11.79 | $29,475 | 0 Indirect | -100.00% | Disposed | 3.8% (price as of 2026-10-02) |
| Dec. 18, 2025 | DSP | S 10b5-1 | 5,000 | $11.93 | $59,650 | 2,500 Indirect | -66.67% | Disposed | 2.6% (price as of 2026-10-02) |
| Dec. 17, 2025 | DSP | S | 9,102 | $11.70 | $106,493 | 347,182 Direct | -2.55% | Disposed | 4.6% (price as of 2026-10-02) |
| Dec. 17, 2025 | DSP | S 10b5-1 | 5,000 | $11.74 | $58,700 | 7,500 Indirect | -40.00% | Disposed | 4.3% (price as of 2026-10-02) |
| Dec. 16, 2025 | DSP | M | 12,500 | · | · | 12,500 Indirect | · | Acquired | (price as of 2026-10-02) |
| Dec. 16, 2025 | DSP | D | 12,500 | · | · | 9,157,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| Dec. 16, 2025 | DSP | M | 12,500 | · | · | 9,157,275 Indirect | -0.14% | Disposed | (price as of 2026-10-02) |
| Sept. 17, 2025 | DSP | D | 313,926 | $9.56 | $3,001,133 | 0 Indirect | -100.00% | Disposed | 28.0% (price as of 2026-10-02) |
| Sept. 16, 2025 | DSP | M | 313,926 | · | · | 313,926 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 16, 2025 | DSP | D | 313,926 | · | · | 9,169,775 Indirect | -3.31% | Disposed | (price as of 2026-10-02) |
| Sept. 16, 2025 | DSP | M | 313,926 | · | · | 9,169,775 Indirect | -3.31% | Disposed | (price as of 2026-10-02) |
| Sept. 15, 2025 | DSP | S | 8,782 | $9.73 | $85,449 | 356,284 Direct | -2.41% | Disposed | 25.8% (price as of 2026-10-02) |
| June 13, 2025 | DSP | S | 8,960 | $13.08 | $117,197 | 365,076 Direct | -2.40% | Disposed | -6.4% (price as of 2026-10-02) |
| March 10, 2025 | DSP | D | 92,204 | $13.32 | $1,228,157 | 374,036 Direct | -19.78% | Disposed | -8.1% (price as of 2026-10-02) |
| Dec. 19, 2024 | DSP | M | 203,527 | $4.44 | $903,660 | 669,767 Direct | +43.65% | Acquired | 175.7% (price as of 2026-10-02) |
| Dec. 19, 2024 | DSP | F | 47,115 | $19.18 | $903,666 | 622,652 Direct | -7.03% | Disposed | -36.2% (price as of 2026-10-02) |
| Dec. 19, 2024 | DSP | D | 156,412 | $19.18 | $2,999,982 | 466,240 Direct | -25.12% | Disposed | -36.2% (price as of 2026-10-02) |
| Dec. 19, 2024 | DSP | M | 203,527 | · | · | 178,105 Direct | -53.33% | Disposed | (price as of 2026-10-02) |
| Dec. 18, 2024 | DSP | G | 31,556 | · | · | 466,240 Direct | -6.34% | Disposed | (price as of 2026-10-02) |
| Dec. 10, 2024 | DSP | D | 8,636 | $21.37 | $184,551 | 497,796 Direct | -1.71% | Disposed | -42.7% (price as of 2026-10-02) |
| Sept. 10, 2024 | DSP | D | 8,636 | $10.07 | $86,965 | 506,432 Direct | -1.68% | Disposed | 21.5% (price as of 2026-10-02) |
| June 10, 2024 | DSP | D | 8,529 | $9.23 | $78,723 | 515,068 Direct | -1.63% | Disposed | 32.6% (price as of 2026-10-02) |
| March 15, 2024 | DSP | A | 194,384 | · | · | 523,597 Direct | +59.05% | Acquired | (price as of 2026-10-02) |
| March 15, 2024 | DSP | A | 96,363 | · | · | 96,363 Direct | · | Acquired | (price as of 2026-10-02) |
| March 10, 2024 | DSP | D | 82,534 | $10.13 | $836,069 | 329,213 Direct | -20.04% | Disposed | 20.8% (price as of 2026-10-02) |
| March 10, 2023 | DSP | D | 35,100 | $4.13 | $144,963 | 411,747 Direct | -7.86% | Disposed | 196.4% (price as of 2026-10-02) |
| March 7, 2023 | DSP | A | 381,632 | · | · | 381,632 Direct | · | Acquired | (price as of 2026-10-02) |
| March 7, 2023 | DSP | A | 180,180 | · | · | 446,847 Direct | +67.57% | Acquired | (price as of 2026-10-02) |
| March 15, 2022 | DSP | A | 472,813 | · | · | 472,813 Direct | · | Acquired | (price as of 2026-10-02) |
| March 15, 2022 | DSP | A | 266,667 | · | · | 266,667 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 10, 2021 | DSP | M | 303,411 | · | · | 9,483,701 Indirect | -3.10% | Disposed | (price as of 2026-10-02) |
| Feb. 10, 2021 | DSP | M | 250,625 | · | · | 7,833,774 Direct | -3.10% | Disposed | (price as of 2026-10-02) |
| Feb. 10, 2021 | DSP | S | 303,411 | $25.00 | $7,585,275 | 0 Indirect | -100.00% | Disposed | -51.0% (price as of 2026-10-02) |
| Feb. 10, 2021 | DSP | M | 303,411 | · | · | 303,411 Indirect | · | Acquired | (price as of 2026-10-02) |
| Feb. 10, 2021 | DSP | S | 250,625 | $25.00 | $6,265,625 | 0 Direct | -100.00% | Disposed | -51.0% (price as of 2026-10-02) |
| Feb. 10, 2021 | DSP | M | 250,625 | · | · | 250,625 Direct | · | Acquired | (price as of 2026-10-02) |
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 |
|---|---|---|---|---|---|---|---|
| July 21, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| June 16, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Disposed |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Disposed |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Disposed |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Disposed |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Acquired |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Acquired |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Acquired |
| June 9, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 52,096 | Acquired |
| May 19, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| April 20, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| March 17, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| Feb. 17, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| Jan. 20, 2026 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| Dec. 16, 2025 | DSP | Class B Units | Class A Common Stock | · | · | 12,500 | Disposed |
| Sept. 16, 2025 | DSP | Class B Units | Class A Common Stock | · | · | 313,926 | Disposed |
| Dec. 19, 2024 | DSP | Non-qualified Stock Option (Right to Buy) | Class A Common Stock | $4.44 | March 7, 2033 | 203,527 | Disposed |
| March 15, 2024 | DSP | Non-qualified Stock Option (Right to Buy) | Class A Common Stock | $9.94 | March 15, 2034 | 96,363 | Acquired |
| March 7, 2023 | DSP | Non-qualified Stock Option (Right to Buy) | Class A Common Stock | $4.44 | March 7, 2033 | 381,632 | Acquired |
| March 15, 2022 | DSP | Non-qualified Stock Option (Right to Buy) | Class A Common Stock | $6.00 | March 15, 2032 | 472,813 | Acquired |
| Feb. 10, 2021 | DSP | Class B Units | Class A Common Stock | $0.00 | · | 303,411 | Disposed |
| Feb. 10, 2021 | DSP | Class B Units | Class A Common Stock | $0.00 | · | 250,625 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 4 holdings
Securities held when first becoming an insider, per SEC Form 3.
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 |
|---|---|---|---|---|---|---|---|---|
| 2025 | · | · | · | · | $776,636 | · | $30,000 | $1,506,636 |
| 2024 | · | · | $1,932,177 | · | $894,345 | · | · | $4,169,668 |
| 2023 | · | · | $800,000 | · | $849,690 | · | · | $3,569,690 |
Figures from the Summary Compensation Table of the company's proxy statement (DEF 14A). Compensation is not a recommendation.