Earl H Nemser

CIK 1391400 · Vice Chairman · last filed 2026-08-04

Earl H Nemser is a Vice Chairman who has filed 216 SEC Form 4 insider transactions across 1 company since 2008. The most recent filing shows the insider was granted $70.7M of IBKR on Aug 4, 2026. Across all open-market trades the lifetime net is −$150.8M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $111.4M 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

$111.44M

Companies

1

Total Filings

216

Lifetime Open-Market Net

-$150.85M

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
IBKR	Vice Chairman	1,232,912	$90.39	$111.44M	-$150.85M	213	2026-08-04

Recent Filings

216 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
2026-08-04	IBKR	Grant (A)	+803,568	$70.71M	EDGAR
2026-05-28	IBKR	Tax (F)	−22,486	-$1.90M	EDGAR
2026-01-28	IBKR	Sell (S)	−155,000	-$11.76M	EDGAR
2026-01-26	IBKR	Sell (S)	−245,000	-$18.97M	EDGAR
2026-01-26	IBKR	Grant (A)	+389	$25.0K	EDGAR
2026-01-22	IBKR	Notice (144)	−400,000	-$30.32M	EDGAR
2026-01-07	IBKR	Grant (A)	+23,629	$25.0K	EDGAR
2025-08-28	IBKR	Notice (144)	−400,000	-$24.72M	EDGAR
2025-08-15	IBKR	Sell (S)	−53,900	-$3.45M	EDGAR
2025-08-14	IBKR	Sell (S)	−201,686	-$13.59M	EDGAR

Showing 1–10 of 216

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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.