Vanderhook Christopher

Director · Officer · Ten-percent owner · DSP

As of 2026-09-16, Vanderhook Christopher has 75 Form 4 transactions on record across 1 company — 62 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Pattern in the record: open-market sales filed in June in multiple years since 2025 — a recurring calendar cadence, more consistent with scheduled activity than a one-off decision.

Reconstructed holdings

Direct $3.5M
Indirect $0

DSP

direct

285,244 sh

$3.5M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

DSP · 75 trades

Filing ledger

Date	Company	Action	Shares @ price	Value	Ownership Δ	Owned after	Filing
2026-07-23	DSP	Sale	4,304 @ $10.47	$45K	−100.0% of holding	0	Form 4
2026-07-22	DSP	Sale	5,000 @ $11.03	$55K	−53.7% of holding	4,304	Form 4
2026-07-21	DSP	Sale	3,196 @ $11.70	$37K	−25.6% of holding	9,304	Form 4
2026-06-18	DSP	Sale	2,500 @ $10.96	$27K	−100.0% of holding	0	Form 4
2026-06-17	DSP	Sale	5,000 @ $11.09	$55K	−66.7% of holding	2,500	Form 4
2026-06-16	DSP	Sale	5,000 @ $11.17	$56K	−40.0% of holding	7,500	Form 4
2026-06-15	DSP	Sale	9,125 @ $11.10	$101K	−3.0% of holding	293,880	Form 4
2026-05-21	DSP	Sale	2,500 @ $10.79	$27K	−100.0% of holding	0	Form 4
2026-05-20	DSP	Sale	5,000 @ $10.60	$53K	−66.7% of holding	2,500	Form 4
2026-05-19	DSP	Sale	5,000 @ $10.89	$54K	−40.0% of holding	7,500	Form 4
2026-04-22	DSP	Sale	2,796 @ $10.74	$30K	−100.0% of holding	0	Form 4
2026-04-21	DSP	Sale	4,704 @ $10.91	$51K	−62.7% of holding	2,796	Form 4
2026-04-20	DSP	Sale	5,000 @ $11.12	$56K	−40.0% of holding	7,500	Form 4
2026-03-19	DSP	Sale	2,920 @ $11.42	$33K	−100.0% of holding	0	Form 4
2026-03-18	DSP	Sale	5,000 @ $12.00	$60K	−63.1% of holding	2,920	Form 4
2026-03-17	DSP	Sale	5,000 @ $11.80	$59K	−38.7% of holding	7,920	Form 4
2026-02-19	DSP	Sale	3,279 @ $9.17	$30K	−88.6% of holding	420	Form 4
2026-02-18	DSP	Sale	4,722 @ $9.19	$43K	−56.1% of holding	3,699	Form 4
2026-02-17	DSP	Sale	4,079 @ $9.26	$38K	−32.6% of holding	8,421	Form 4
2026-01-22	DSP	Sale	2,574 @ $12.87	$33K	−100.0% of holding	0	Form 4
2026-01-21	DSP	Sale	4,926 @ $12.24	$60K	−65.7% of holding	2,574	Form 4
2026-01-20	DSP	Sale	5,000 @ $11.94	$60K	−40.0% of holding	7,500	Form 4
2025-12-19	DSP	Sale	2,500 @ $11.79	$29K	−100.0% of holding	0	Form 4
2025-12-18	DSP	Sale	5,000 @ $11.93	$60K	−66.7% of holding	2,500	Form 4
2025-12-17	DSP	Sale	9,102 @ $11.70	$107K	−2.6% of holding	347,182	Form 4
2025-12-17	DSP	Sale	5,000 @ $11.74	$59K	−40.0% of holding	7,500	Form 4
2025-09-15	DSP	Sale	8,782 @ $9.73	$85K	−2.4% of holding	356,284	Form 4
2025-06-13	DSP	Sale	8,960 @ $13.08	$117K	−2.4% of holding	365,076	Form 4

47 award / exercise / gift records — not counted as purchases

Date	Company	Action	Shares	Owned after	Filing
2026-09-10	DSP	Disposition	8,636	285,244	Form 4
2026-07-21	DSP	Disposition	12,500	9,069,775	Form 4
2026-07-21	DSP	Option exercise	12,500	12,500	Form 4
2026-07-21	DSP	Award / grant	12,500	9,069,775	Form 4
2026-07-21	DSP	Award / grant	12,500	9,069,775	Form 4
2026-06-16	DSP	Option exercise	12,500	12,500	Form 4
2026-06-16	DSP	Disposition	12,500	9,082,275	Form 4
2026-06-16	DSP	Option exercise	12,500	9,082,275	Form 4
2026-06-16	DSP	Option exercise	12,500	9,082,275	Form 4
2026-06-09	DSP	Award / grant	52,096	52,096	Form 4
2026-06-09	DSP	Gift	52,096	0	Form 4
2026-05-19	DSP	Option exercise	12,500	12,500	Form 4
2026-05-19	DSP	Disposition	12,500	9,094,775	Form 4
2026-05-19	DSP	Option exercise	12,500	9,094,775	Form 4
2026-05-19	DSP	Option exercise	12,500	9,094,775	Form 4
2026-04-20	DSP	Disposition	12,500	9,107,275	Form 4
2026-04-20	DSP	Option exercise	12,500	12,500	Form 4
2026-04-20	DSP	Option exercise	12,500	9,107,275	Form 4
2026-04-20	DSP	Option exercise	12,500	9,107,275	Form 4
2026-03-17	DSP	Disposition	12,500	9,119,775	Form 4
2026-03-17	DSP	Option exercise	12,500	12,920	Form 4
2026-03-17	DSP	Option exercise	12,500	9,119,775	Form 4
2026-03-17	DSP	Option exercise	12,500	9,119,775	Form 4
2026-03-10	DSP	Disposition	44,177	303,005	Form 4
2026-02-17	DSP	Disposition	12,500	9,132,275	Form 4
2026-02-17	DSP	Option exercise	12,500	12,500	Form 4
2026-02-17	DSP	Option exercise	12,500	9,132,275	Form 4
2026-02-17	DSP	Option exercise	12,500	9,132,275	Form 4
2026-01-20	DSP	Option exercise	12,500	12,500	Form 4
2026-01-20	DSP	Disposition	12,500	9,144,775	Form 4
2026-01-20	DSP	Option exercise	12,500	9,144,775	Form 4
2026-01-20	DSP	Option exercise	12,500	9,144,775	Form 4
2025-12-16	DSP	Option exercise	12,500	12,500	Form 4
2025-12-16	DSP	Disposition	12,500	9,157,275	Form 4
2025-12-16	DSP	Option exercise	12,500	9,157,275	Form 4
2025-12-16	DSP	Option exercise	12,500	9,157,275	Form 4
2025-09-17	DSP	Disposition	313,926	0	Form 4
2025-09-16	DSP	Option exercise	313,926	313,926	Form 4
2025-09-16	DSP	Disposition	313,926	9,169,775	Form 4
2025-09-16	DSP	Option exercise	313,926	9,169,775	Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.