Roelof Rongen

CIK 1698966 · Chief Executive Officer · last filed 2025-09-22

Roelof Rongen is a Chief Executive Officer who has filed 6 SEC Form 4 insider transactions across 2 companies since 2017. The most recent filing, for GRI, was dated Sep 22, 2025. Across all open-market trades the lifetime net is +$6.8K, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $2.8M 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

$2.76M

Companies

2

Total Filings

6

Lifetime Open-Market Net

$6.8K

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
GRI	Director	—	$2.25	—	$0	5	2025-09-22
MTNB	Chief Executive Officer	3,539,416	$0.78	$2.76M	$6.8K	1	2017-09-11

Recent Filings

6 filings

Form 4 transactions across all companies, newest first.

Filed	Symbol	Action	Net Shares	Net $	Link
2025-09-22	GRI	Grant (A)	—	$0	EDGAR
2025-08-27	GRI	Grant (A)	—	$0	EDGAR
2025-08-14	GRI	Grant (A)	—	$0	EDGAR
2025-01-24	GRI	Grant (A)	—	$0	EDGAR
2023-08-14	GRI	Grant (A)	—	$0	EDGAR
2017-09-11	MTNB	Buy (P)	+5,000	$6.8K	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.