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Livermore
Livermore
ZHEN

Harbor Advisors LLC

SEC CIK
0001687156
Latest filing
Jul 28, 2026

IBKR holding history

Interactive Brokers Group, Inc. in every 13F filed by Harbor Advisors LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

IBKR overviewAll 13F holders of IBKRFull Q2 2026 holdings

Shares (Q2 2026)
186,832
Value
$16.3M
% of portfolio
2.0%
Quarters held
22
Since Q1 2021
Holdings of IBKR by Harbor Advisors LLC, by quarter
QuarterSharesValue% of portfolioShare changeActionAll holders
Q2 2026186,832$16.3M2.0%00.0%UnchangedHolders
Q1 2026186,832$12.5M1.8%00.0%UnchangedHolders
Q4 2025186,832$12.0M1.8%00.0%UnchangedHolders
Q3 2025186,832$12.9M2.0%00.0%UnchangedHolders
Q2 2025186,832$10.4M1.7%00.0%UnchangedConverted for a 4-for-1 splitHolders
Q1 202546,708$7.73M1.3%00.0%UnchangedHolders
Q4 202446,708$8.25M1.3%00.0%UnchangedHolders
Q3 202446,708$6.51M1.1%00.0%UnchangedHolders
Q2 202446,708$5.73M1.0%+1,500+3.3%AddedHolders
Q1 202445,208$5.05M0.9%−4,350−8.8%ReducedHolders
Q4 202349,558$4.11M0.8%00.0%UnchangedHolders
Q3 202349,558$4.29M0.9%00.0%UnchangedHolders
Q2 202349,558$4.12M0.9%00.0%UnchangedHolders
Q1 202349,558$4.09M1.0%00.0%UnchangedHolders
Q4 202249,558$3.59M0.9%00.0%UnchangedHolders
Q3 202249,558$3.17M0.9%00.0%UnchangedHolders
Q2 202249,558$2.73M0.7%00.0%UnchangedHolders
Q1 202249,558$3.27M0.7%00.0%UnchangedHolders
Q4 202149,558$3.94M0.7%00.0%UnchangedHolders
Q3 202149,558$3.09M0.6%00.0%UnchangedHolders
Q2 202149,558$3.26M0.6%00.0%UnchangedHolders
Q1 202149,558$3.62M0.8%––Holders

Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.