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Interactive Brokers Gro-Cl A

IBKRBelow valueExpectations · modest

Held by 9 superinvestors.

Price$82.69
Margin of safety−33%
Holders9
Total value$1.13B

SEC 10-K · fundamentals

Business quality

As of 2025-12-31

Valuation basis: trailing twelve months to 2026-06-30 — latest 10-K plus unaudited 10-Q filings.

Revenue growth
+23.4%
Net margin
178.6%
ROE
81.2%
FCF margin
—
Revenue $1.29B → $2.44B · 6y
What makes a business high quality

Valuation · value band

Margin of safety

$123/ sh · growth-anchored intrinsic value
margin of safety
fair value
above fair value
$83
cheaperpricier

Zero-growth floor

$72

Central IV

$123

Optimistic top

$145

Interactive Brokers Gro-Cl A (IBKR): A conservative value band $72–$145 / sh (zero-growth floor to growth-capped optimistic top); central read about $123. Today’s price sits below that band (price $83 as of 2026-10-16).

The middle figure is the main read. The right end is the optimistic case under the same conservative caps — not an absolute ceiling.

Revenue growth 7% (lower of historical trend and fundamental cap, capped by moat) · moat 10 yr · discount 10.8% · Zero-growth downside $72

Price as of 2026-10-16 · yahoo · DGS10 5.1% @ 2026-10-15.

Method & numbers

Operating income is not reported separately (e.g. banks, insurers, and some diversified issuers), so earnings power is shown via the owner-earnings lens only; the unlevered NOPAT lens does not apply.

Model cautions

  • Owner-earnings yield diverges sharply from the 10-year Treasury (over 300 bps).
  • Growth nearly matches the discount rate — the estimate is sensitive to assumptions.

A conservative intrinsic-value band (zero-growth floor to growth-capped DCF) plus a tangible asset floor — not investment advice, not a buy/sell signal, and not a price target.

Owner-earnings DCF $78.26 – $145.32 · Greenwald zero-growth $87.42 · zero-growth base $87.42 · reproduction $13.00

Moat Franchise (moat) · terminal value 49% of present value · owner-earnings yield 10% vs 10Y 5.1%.

Graham earnings-power value (normalized NOPAT)

Operating income is not reported separately (e.g. banks, insurers, and some diversified issuers), so earnings power is shown via the owner-earnings lens only; the unlevered NOPAT lens does not apply.

Normalized NOPAT from operating margin — not applicable when operating income is not reported separately. Unlevered (pre-interest, attributable to all capital). Capitalized at the 9–11% rate band (read as a WACC proxy). Enterprise → equity bridge (+ cash − total debt) — not applied (lens not assessable).

Years: TTM 2026-06-30, 2024, 2023, 2022, 2021

Buffett owner-earnings value$71.52 – $87.42 / sh

Owner earnings = average net income + average D&A − maintenance capex (zero-growth floor; no ΔNWC). Levered (starts from net income, already after interest — an equity-holder stream). Capitalized at the 9–11% rate band (read as a cost-of-equity proxy). No enterprise→equity bridge: the capitalized result is already equity value (subtracting debt would double-count interest).

Years: TTM 2026-06-30, 2024, 2023, 2022, 2021

v1 simplifications: Maintenance capex or D&A unavailable → degraded to normalized net income (= average net income over the years shown). One-time items are not separately normalized (multi-year averaging smooths them partially). Share-based compensation is left as a real expense (not added back); see the SBC/OE disclosure. Capitalized at the 9–11% band as a cost-of-equity proxy; no leverage premium applied (net cash or debt within the no-charge range).

Reproduction value = tangible net assets $5.85B = $13.00 / sh. Tangible net assets = shareholders' equity − goodwill − intangibles, ÷ diluted shares (no R&D history to capitalize).

Moat reading: Franchise test compares earnings power (EPV) against reproduction value on both AV_conservative (tangible + capitalized R&D) and AV_reproduction (conservative + acquired-reset proxy). Both must clear the franchise multiple for a moat signal; near it, a commodity; below it, value destruction. A directional reading, not a verdict.

Assumes a narrow moat · competitive-advantage period ≈ 10 years.

Growth value not assessable — Operating income is not available across the window, so ROIIC / growth value cannot be computed.

Window TTM 2026-06-30, FY 2024, 2023, 2022, 2021 · discount band 9%–11% · normalized tax 8% (Average effective tax rate over 5 year(s), capped at the statutory 21%.) · diluted shares.

Owner-earnings DCF: growth g₁ 7% · OE FY TTM 2026-06-30, 2024, 2023, 2022, 2021 · Discount band: 9.60%–12.00% (DGS10 +4.5% to a 12% strict end, as of 2026-10-15). No enterprise→equity bridge: owner earnings already flow to shareholders (post-interest), so no net cash is added and no debt subtracted — matching the engine owner-earnings lamp.

Valuation basis: trailing twelve months to 2026-06-30 — latest 10-K plus unaudited 10-Q filings.

What the price is betting

Today's price pencils in about -0.3% a year in owner-earnings for the next few years. Revenue actually grew 11.9% a year.

Below what it has already done.

Roughly, the price needs its historical revenue growth to run about 2 more years to hold up.

How to read intrinsic value

SEC 13F · holders

Superinvestors Holding This Security

9 holders · $1.13B combined · this quarter +2 opened / -0 exited

This quarter2 opened1 added4 trimmed
Holders 7 → 9 · last 8 quarters

SEC 13F · notes

Written summary

Interactive Brokers Gro-Cl A (IBKR) is held by 9 of the superinvestors tracked on Compounder, with a combined $1.13B in reported 13F value. The largest position belongs to Andreas Halvorsen, where it makes up 1.2% of the portfolio.

Other notable holders by value include John Armitage (3.5% of its book), Quincy Lee (22.9% of its book) and Bryan Lawrence (33.4% of its book).

In the quarter ended 2026-06-30, 2 of the tracked filers opened a new position in IBKR, 1 added to existing ones, 4 trimmed, and 0 sold out entirely.

Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-06-30. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.

How to read a 13F

SEC 13F · co-ownership

Also held by these investors

Investors holding Interactive Brokers Gro-Cl A (IBKR) also commonly hold →

IBKR's price is below its conservative value band. Browse all undervalued stocks by margin of safety

Also on

Sources· SEC EDGAR 13F as of 2026-06-30 · filed 2026-08-14

Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.

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