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Steven J Mento

CIK 1324466 · President and CEO · last filed 2026-01-06

Steven J Mento is a President and CEO who has filed 43 SEC Form 4 insider transactions across 4 companies since 2007. The most recent filing, for DRMAW, was dated Jan 6, 2026. Across all open-market trades the lifetime net is −$1.5M, making them a net seller over the disclosed history.

"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.

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Disclosed Exposure

$0

Companies

4

Total Filings

43

Lifetime Open-Market Net

-$1.52M

Filer Profile

Reported Address
C/O SANGAMO BIOSCIENCES, INC.
501 CANAL BLVD SUITE A-100
RICHMOND, CA 94804
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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
DRMAW Director — $0.00 — $0 5 2026-01-06
Histogen Inc. (HSTO) Delisted President and CEO 4,114 $0.21 $885 $0 7 2023-03-14
Histogen Inc. (CNAT) Delisted President, CEO & Director 48,708 — — $151.8K 10 2019-08-01
SANGAMO THERAPEUTICS, INC (SGMO) Delisted Director 46,546 $0.18 $8.3K -$1.67M 21 2018-06-12

Recent Filings

43 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-01-06 DRMAW Grant (A) — $0 EDGAR
2025-01-14 DRMAW Grant (A) — $0 EDGAR
2024-01-05 DRMAW Grant (A) — $0 EDGAR
2023-03-14 Histogen Inc. (HSTO) Delisted Mixed — $0 EDGAR
2022-11-09 Histogen Inc. (HSTO) Delisted Disp (D) — $0 EDGAR
2022-02-25 Histogen Inc. (HSTO) Delisted Grant (A) — $0 EDGAR
2022-01-05 DRMAW Grant (A) — $0 EDGAR
2021-11-10 Histogen Inc. (HSTO) Delisted Grant (A) — $0 EDGAR
2021-09-03 Histogen Inc. (HSTO) Delisted Grant (A) — $0 EDGAR
2021-08-17 DRMAW Grant (A) — $0 EDGAR
Showing 1–10 of 43
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Form 4 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.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.