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Stocks / United States / IBKR / Holders

Interactive Brokers Group, Inc. 13F holders

Of the 44 funds followed here, 13 reported a position in Interactive Brokers Group, Inc. in a 13F for the quarter ended 30 June 2026. The largest: FMR LLC, 11.8 million shares worth $1.03 billion, 0.0% of its reported book. New this quarter: Lone Pine Capital, Alyeska.

FundSharesValueOf its bookChange on the quarterStatusQuarter endedFiling
FMR LLC11,828,151$1.03 billion0.0%-673,133trimmed30 June 202613F
Geode Capital Management10,641,906$925.5 million0.0%+198,299added30 June 202613F
Two Sigma Investments8,398,700$731.0 million0.5%+2,029held30 June 202613F
Norges Bank6,334,173$551.3 million0.1%held30 June 202613F
Viking Global Investors4,830,748$420.5 million1.2%+3,436,419added30 June 202613F
Citadel Advisors2,493,343$217.0 million0.0%+581,870added30 June 202613F
Point72 Asset Management1,039,584$90.5 million0.1%+677,092added30 June 202613F
Millennium Management999,459$87.0 million0.0%+263,959added30 June 202613F
Lone Pine Capital577,666$50.3 million0.3%+577,666new30 June 202613F
Soros Fund Management151,470$13.2 million0.2%-493,874trimmed30 June 202613F
Renaissance Technologies63,900$5.6 million0.0%-397,800trimmed30 June 202613F
Bridgewater Associates42,076$3.7 million0.0%-30,261trimmed30 June 202613F
Alyeska28,841$2.5 million0.0%+28,841new30 June 202613F

Value is what the fund reported. Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.

Schedule 13D and 13G filed on the name, last twelve months

FiledScheduleWhoHoldingOf the classEvent dateRule or purposeFiling
30 April 202613GVanguard Capital Management and 1 other32.5 million7.3%31 March 2026passive, institutional (13d-1(b))EDGAR
27 March 202613G/AThe Vanguard Group and 1 other00.0%13 March 2026passive, institutional (13d-1(b))EDGAR
7 November 202513G/ABares Capital Management, Inc. and 1 othern/an/a31 October 2025passive, institutional (13d-1(b))EDGAR
17 October 202513G/ABlackRock, Inc. and 1 other27.6 million6.2%30 September 2025passive, institutional (13d-1(b))EDGAR

A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder. Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.

Fails to deliver

Settlement dateShares failedPriceFile
31 August 20261,482$95.84SEC
28 August 20262,892$96.55SEC
27 August 20262,587$97.02SEC
25 August 20261$93.05SEC
24 August 20261,200$93.87SEC
19 August 20261,045$90.56SEC
17 August 20264,791$92.06SEC
14 August 2026276$91.42SEC
13 August 2026555$91.66SEC
10 August 2026619$87.83SEC
6 August 202636$88.74SEC
4 August 202613,390$87.75SEC
31 July 20262,116$90.48SEC
29 July 20265,555$90.91SEC
24 July 2026376$91.76SEC
22 July 2026784$94.42SEC
17 July 20261,223$92.21SEC
16 July 20261,831$97.41SEC

Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period. Largest in the window: 13,390 on 4 August 2026. A fail is an operational fact about settlement, not a position.

Source

Each fund's 13F-HR on EDGAR, linked per row; positions matched to IBKR by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.

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