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Quantitative Finance · Glossary

What is Firm profile?

Definition 2.1 The Industry: Firms, Roles and Careers · Chapter 2 — Proprietary Market Makers and High-Frequency Firms

A firm profile, in this book, is a set of facts about an employer, each a range with a unit, the date it describes, its scope (the whole firm or one legal entity of it) and the public source it comes from. A field with no admissible fact is left empty and says so.

Examples

Example 2.2 (One group’s European subsidiary)

Jane Street Europe Limited, a London-based subsidiary of Jane Street Group, LLC, states in its 2025 strategic report that its group of subsidiaries “primarily carries out principal trading activities” and is compensated for trading performed on behalf of the group under a trading services agreement and the group’s transfer-pricing arrangements. It reports revenues of $643.0 million for 2025 against $995.8 million for 2024, a fall of 35.4%, after-tax profits of $437.4 million (68.0% of revenue) against $654.9 million, and total equity of $3 058.9 million, up 15.1%. These are the numbers of one entity of the group under the group’s own allocation rules; they are not the firm’s revenue, and they cannot be scaled up to it.

Example 2.3 (One broker-dealer’s balance sheet)

The public statement of financial condition of Citadel Securities LLC at 31 December 2023 describes a company that “primarily engages in market making and liquidity provision in U.S. options, equities, government securities, and foreign exchange products”, with total assets of $52 344 million and member’s capital of $4 693 million: assets of 11.2 times capital. It says nothing of revenue, profit or staff.

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