Aleksandra Rizo

CIK 1766210 · EVP, Chief Medical Officer · last filed 2026-02-06

Aleksandra Rizo is an EVP, Chief Medical Officer who has filed 7 SEC Form 4 insider transactions across 2 companies since 2019. The most recent filing, for SNDX, was dated Feb 6, 2026. Current disclosed insider exposure totals $894.2K 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

$894.2K

Companies

2

Total Filings

7

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
SNDX	Director	49,000	$18.25	$894.2K	$0	3	2026-02-06
GERN	EVP, Chief Medical Officer	—	$1.15	—	$0	4	2022-02-18

Recent Filings

7 filings

Form 4 transactions across all companies, newest first.

Filed	Symbol	Action	Net Shares	Net $	Link
2026-02-06	SNDX	Grant (A)	+24,000	$0	EDGAR
2025-02-07	SNDX	Grant (A)	+25,000	$0	EDGAR
2024-05-16	SNDX	Grant (A)	—	$0	EDGAR
2022-02-18	GERN	Grant (A)	—	$0	EDGAR
2021-02-04	GERN	Grant (A)	—	$0	EDGAR
2020-02-14	GERN	Grant (A)	—	$0	EDGAR
2019-02-01	GERN	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.