Form 4 for IBKR Interactive Brokers

Accepted 2026-03-26 00:00:00 ET · period of report 2026-02-25 · accession 0001381197-26-000068 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
MT	2026-03-26	2026-02-25+	IBKR	Conkling Lori A	Dir	P - Purchase	$71.88	+75	2,409	+3%	+$5,391

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Class A common stock	2026-02-25	P	A	50	$73.21	2,384	D	—	—	(F1) This amount includes (a) securities acquired by the Reporting Person; (b) Class A common stock attributable to vested restricted stock units that were awarded under the 2007 Stock Incentive Plan as amended ("Plan"); and (c) unvested restricted stock units that were awarded under the Plan.
2	Common	Class A common stock	2026-03-02	P	A	25	$69.21	2,409	D	—	—	(F1) This amount includes (a) securities acquired by the Reporting Person; (b) Class A common stock attributable to vested restricted stock units that were awarded under the 2007 Stock Incentive Plan as amended ("Plan"); and (c) unvested restricted stock units that were awarded under the Plan.