IBKR Q3 2026 EPS $0.69, Revenue $1.91B, Growth Holds

What happened

Interactive Brokers reported Q3 2026 diluted EPS of $0.69 ($0.67 adjusted), up 17% from $0.59 ($0.57 adjusted) a year ago, on net revenues of $1.91 billion ($1.87 billion adjusted), representing a 15% revenue increase. The growth appears broad-based against a strong prior-year quarter, but the press release provides only headline figures and omits key metrics such as account growth, DARTs, and net interest income sensitivity that the company's previous disclosures flagged as critical. In our last full analysis (January 2026), we rated IBKR a WAIT at $75.97, citing a rich ~21x trailing P/E and dependence on trading activity and interest rates, with a base case of mid-teens account growth and pre-tax margins settling in the low-70s. The Q3 2026 results exceed the EPS growth threshold (>12% annually) we set for a potential upgrade, but without confirmation of sustained pre-tax margins above 75% or evidence that NII is not being eroded by rate cuts, the fundamental debate remains unresolved. Investors should view this press release with skepticism, as management tends to highlight favorable adjusted figures and may not disclose softening sequential trends in client engagement or net interest margin compression that would be visible in the full 10-Q.

Implication

For existing holders, the Q3 beat is a positive confirmation of franchise strength, but it does not eliminate the risk that the stock is pricing in further perfection, so consider trimming into strength above $90 per our prior guidance. The key question for the next quarter is whether revenue quality improved: did commission growth outpace NII, did account growth stay above 10%, and did pre-tax margins hold above 75%? If the 10-Q reveals that NII declined sequentially or year-over-year due to rate cuts, or that DARTs and margin balances have fallen, the apparent EPS growth may be flattered by one-time items or expense timing, and the stock could face multiple compression. On the other hand, if the company sustains >12% EPS growth for two consecutive quarters with margins above 75%, that would meet our 'increases if' condition and justify moving to a BUY on any pullback toward the mid-$70s. Until those details are available, the risk/reward at current prices is balanced at best, and we would not chase the stock after this announcement.

Thesis delta

The Q3 2026 results reinforce the growth trajectory and suggest that the business is performing better than our base case, but the lack of detail on margin and NII prevents a definitive upgrade. The core thesis of a superior secular grower with a strong moat remains intact, but the valuation question is unresolved. We maintain our WAIT rating pending the 10-Q, with a bias to upgrade if the margin and activity metrics confirm the top-line strength.