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Charles S Berkman

CIK 1392266 · Chief Legal Officer · last filed 2026-04-07

Charles S Berkman is a Chief Legal Officer who has filed 90 SEC Form 4 insider transactions across 2 companies since 2007. The most recent filing, for OABI, was dated Apr 7, 2026. Across all open-market trades the lifetime net is −$21.1M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $7.1M 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.

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Disclosed Exposure

$7.09M

Companies

2

Total Filings

90

Lifetime Open-Market Net

-$21.13M

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
OABIW Chief Legal Officer 406,242 $0.08 $33.9K -$278.5K 20 2026-04-07
LGND SVP, Gen. Counsel & Secretary 23,825 $296.28 $7.06M -$20.85M 60 2022-11-03

Recent Filings

90 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
2026-04-07 OABI Notice (144) −7,157 -$10.6K EDGAR
2026-04-07 OABIW Mixed +6,385 -$10.7K EDGAR
2026-02-18 OABIW Mixed +9,077 -$16.5K EDGAR
2026-02-17 OABI Notice (144) −6,891 -$11.7K EDGAR
2026-02-17 OABIW Mixed +6,552 -$11.9K EDGAR
2025-12-09 OABIW Mixed +7,577 -$15.8K EDGAR
2025-12-08 OABI Notice (144) −8,044 -$15.8K EDGAR
2025-04-07 OABI Notice (144) −7,206 -$14.4K EDGAR
2025-04-07 OABIW Mixed +6,336 -$14.4K EDGAR
2025-02-19 OABIW Mixed +13,686 -$56.9K EDGAR
Showing 1–10 of 90
Page 1 of 9
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.