NEMSER EARL H

PrivateCIK: 1391400
Location

GREENWICH, CT

NEMSER EARL H (Vice Chairman) sold 61.3% of their position (245K shares) of INTERACTIVE BROKERS GROUP, INC. on the open market

Open‑market sale worth $18.97M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 3 sales
InsiderNEMSER EARL HCIK 1391400
DirectorOfficer· Vice Chairman
Since Dec 2018
-245K
Net shares
Net seller
$18.97M
Total sold
3
Open market trades
0B · 3S
3
Total transactions
245K disposed
Non-Derivative Transactions3

Class A common stock

Indirect
S · Sale

Shares

100K

Price / share

$76.81

Trade value

$7.68M

% of position

25.0%
1/22/2026
400K300K

Class A common stock

Indirect
S · Sale

Shares

84.94K

Price / share

$77.65

Trade value

$6.60M

% of position

28.3%
1/23/2026
300K215.06K

Class A common stock

Indirect
S · Sale

Shares

60.06K

Price / share

$78.14

Trade value

$4.69M

% of position

27.9%
1/23/2026
215.06K155K
Total

Net shares

245K

Net value

-$18.97M

Derivative Transactions0
No derivative transactions reported
Non-Derivative Holdings (Post-Transaction)1

Class A common stock

Direct
Shares owned451.83K
Total
451.83K direct451.83K
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
NEMSER EARL H — Insider Transaction (Form 4) Filed Jan 26, 2026 | Finecho