David J. Wambeke

CIK 1971798 · Chief Business Officer · last filed 2026-03-03

David J. Wambeke is a Chief Business Officer who has filed 6 SEC Form 4 insider transactions across 2 companies since 2023. The most recent filing, for NMTC, was dated Mar 3, 2026. Across all open-market trades the lifetime net is +$1.6M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $6.2M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

Disclosed Exposure

$6.22M

Companies

2

Total Filings

6

Lifetime Open-Market Net

$1.62M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.

Symbol	Role	Shares	Price	Disclosed Exposure	Lifetime OM Net	Filings	Latest Filed
NMTC	Chief Business Officer	1,000,000	$3.24	$3.24M	$670.4K	1	2026-03-03
DMAC	Chief Business Officer	527,114	$5.65	$2.98M	$949.2K	5	2025-06-03

Recent Filings

6 filings

Form 4 transactions across all companies, newest first.

Filed	Symbol	Action	Net Shares	Net $	Link
2026-03-03	NMTC	Mixed	+1,000,000	$670.4K	EDGAR
2025-06-03	DMAC	Grant (A)	—	$0	EDGAR
2024-06-03	DMAC	Grant (A)	—	$0	EDGAR
2023-11-16	DMAC	Buy (P)	+20,000	$49.2K	EDGAR
2023-06-26	DMAC	Buy (P)	+38,364	$150.0K	EDGAR
2023-04-11	DMAC	Mixed	+468,750	$750.0K	EDGAR

Codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.