Kathryn Penkus Corzo

CIK 1884123 · last filed 2025-11-04

Kathryn Penkus Corzo is a corporate insider who has filed 4 SEC Form 4 insider transactions across 2 companies since 2021. The most recent filing, for MRKR, was dated Nov 4, 2025.

"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

$0

Companies

2

Total Filings

4

Lifetime Open-Market Net

$0

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
MRKR	Director	—	$1.38	—	$0	1	2025-11-04
MTNB	Director	—	$0.78	—	$0	3	2023-11-03

Recent Filings

4 filings

Form 4 transactions across all companies, newest first.

Filed	Symbol	Action	Net Shares	Net $	Link
2025-11-04	MRKR	Grant (A)	—	$0	EDGAR
2023-11-03	MTNB	Grant (A)	—	$0	EDGAR
2022-11-16	MTNB	Grant (A)	—	$0	EDGAR
2021-11-02	MTNB	Grant (A)	—	$0	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.