Thomas Peterffy Insider Holdings
Interactive Brokers Group. Pioneer of electronic trading. Peterffy founded Interactive Brokers and revolutionized market making by introducing early computer-driven trading. He is a prominent advocate for automated, low-cost market access.
As of the latest Q1 2025 filing, Thomas Peterffy (managing Interactive Brokers Group) reported a public portfolio value of $37.9B with 2 positions.
Open interactive portfolioThomas Peterffy insider transaction profile overview
Thomas Peterffy's Q1 2025 SEC Form 4 holdings show Interactive Brokers Group reporting 2 positions with a disclosed portfolio value of $37.9B. For readers searching Thomas Peterffy insider holdings, Thomas Peterffy portfolio, or Interactive Brokers Group holdings, the latest top holdings include Interactive Brokers Group, Inc. — Class B Common Stock (via IBG Holdings) [Indirect] and Interactive Brokers Group, Inc. — Class A common stock [Direct].
The three largest reported positions add up to roughly 100.0%, which helps readers judge portfolio concentration rather than just headline AUM. The largest reported sector exposure is Financials at 100.0% of the disclosed portfolio. This makes the page useful for comparing the manager's actual disclosed exposure with market narratives around the same names.
The latest change data highlights reported buys such as notable reported positions and reported reductions or exits such as notable reported positions. Those changes should be read as historical disclosure signals, not as real-time trade alerts.
The source metadata lists report date 2025-02-20, filing date 2025-02-24. Public disclosure formats differ by source, so Whale Analyzer labels the data type clearly and avoids presenting every profile as a 13F fund.
Top reported holdings
| Holding | Reported value | Weight | Quarter change |
|---|---|---|---|
| IBKR whale holders Interactive Brokers Group, Inc. — Class B Common Stock (via IBG Holdings) [Indirect] | $37.60B | 99.2% | Held |
| IBKR whale holders Interactive Brokers Group, Inc. — Class A common stock [Direct] | $303.2M | 0.8% | Held |
Top buys
No reported items for this period.
Top sells
No reported items for this period.
Allocation
- Financials: 100.0%
Data notes
Report date: 2025-02-20
Disclosure source: SEC Form 4
13F filings are delayed public disclosures and do not include every asset class, short positions, or real-time trades.
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Frequently asked questions
What is Thomas Peterffy buying?
The latest tracked change data for Thomas Peterffy highlights reported buys such as notable reported positions. Because SEC Form 4 data is historical, use it as a research trail rather than a live trade alert.
Thomas Peterffy insider transaction profile
The Q1 2025 SEC Form 4 profile for Thomas Peterffy and Interactive Brokers Group shows 2 reported positions, $37.9B in disclosed portfolio value, and top holdings including Interactive Brokers Group, Inc. — Class B Common Stock (via IBG Holdings) [Indirect] and Interactive Brokers Group, Inc. — Class A common stock [Direct].
Interactive Brokers Group holdings
Interactive Brokers Group holdings are summarized from public disclosures with reported values, weights, top buys, top sells, and filing metadata where available.
How delayed is Thomas Peterffy's 13F data?
SEC Form 13F requires institutional investment managers with $100M+ in US equities to disclose their holdings quarterly. Read our comprehensive 13F guide.