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Harbor Advisors LLC

Position in IBKR — Interactive Brokers Group, Inc.

CIK 1687156 West Palm Beach, FL

Position in IBKR

as of Jun 30, 2026 · filed Jul 28, 2026
Position Value
$16,261,857
+$3,731,035 QoQ
Shares Held
186,832
0.0% QoQ
Ownership
0.042%
of shares outstanding
% of Portfolio
2.07%
of 13F equity value
Holder Rank
#14
of 297 holders
Holding Since
Mar 2020
26 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in IBKR Over Time

Shares Held

Position Value (USD)

Position in Capital Markets

Financial Services · as of Jun 30, 2026

Harbor Advisors LLC holds $34,715,421 across 9 Capital Markets names. IBKR ranks #1 (46.8% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 IBKR
Interactive Brokers Group, Inc.
This page
186,832 $16,261,857

All Filings in IBKR

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26 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $16,261,857 186,832
2026-03-31 $12,530,822 186,832
2025-12-31 $12,015,165 186,832
2025-09-30 $12,855,909 186,832
2025-06-30 $10,352,361 186,832
2025-03-31 $7,734,377 46,708
2024-12-31 $8,251,902 46,708
2024-09-30 $6,509,226 46,708
2024-06-30 $5,726,400 46,708
2024-03-31 $5,050,185 45,208
2023-12-31 $4,108,358 49,558
2023-09-30 $4,289,740 49,558
2023-06-30 $4,116,783 49,558
2023-03-31 $4,091,508 49,558
2022-12-31 $3,585,521 49,558
2022-09-30 $3,167,251 49,558
2022-06-30 $2,726,185 49,558
2022-03-31 $3,266,367 49,558
2021-12-31 $3,935,896 49,558
2021-09-30 $3,089,445 49,558
2021-06-30 $3,257,447 49,558
2021-03-31 $3,619,716 49,558
2020-12-31 $3,019,073 49,558
2020-09-30 $2,395,138 49,558
2020-06-30 $2,070,037 49,558
2020-03-31 $2,139,418 49,558