NEMSER EARL H

PrivateCIK: 1391400
Location

GREENWICH, CT

NEMSER EARL H (Vice Chairman) sold 30.8% of their position (201.69K shares) of INTERACTIVE BROKERS GROUP, INC. on the open market

Open‑market sale worth $13.59M — a major position exit. Review remaining holdings and any 10b5‑1 plan disclosures.

S · 7 sales
InsiderNEMSER EARL HCIK 1391400
DirectorOfficer· Vice Chairman
Since Dec 2018
-201.69K
Net shares
Net seller
$13.59M
Total sold
7
Open market trades
0B · 7S
7
Total transactions
201.69K disposed
Non-Derivative Transactions7

Class A common stock

Indirect
S · Sale

Shares

153K

Price / share

$67.39

Trade value

$10.31M

% of position

23.3%
8/12/2025
655.59K502.59K

Class A common stock

Indirect
S · Sale

Shares

41.09K

Price / share

$67.88

Trade value

$2.79M

% of position

8.2%
8/12/2025
502.59K461.50K

Class A common stock

Indirect
S · Sale

Shares

4.60K

Price / share

$63.75

Trade value

$293.25K

% of position

1.0%
8/13/2025
461.50K456.90K

Class A common stock

Indirect
S · Sale

Shares

200.00

Price / share

$64.19

Trade value

$12.84K

% of position

0.0%
8/13/2025
456.90K456.70K

Class A common stock

Indirect
S · Sale

Shares

200.00

Price / share

$66.09

Trade value

$13.22K

% of position

0.0%
8/13/2025
456.70K456.50K

Class A common stock

Indirect
S · Sale

Shares

2.40K

Price / share

$66.77

Trade value

$160.25K

% of position

0.5%
8/13/2025
456.50K454.10K

Class A common stock

Indirect
S · Sale

Shares

200.00

Price / share

$67.20

Trade value

$13.44K

% of position

0.0%
8/13/2025
454.10K453.90K
Total

Net shares

201.69K

Net value

-$13.59M

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

Class A common stock

Direct
Shares owned427.81K
Total
427.81K direct427.81K
Derivative Holdings (Post-Transaction)0
No derivative holdings reported
NEMSER EARL H — Insider Transaction (Form 4) Filed Aug 14, 2025 | Finecho