Large Traders
Under SEC Rule 13h-1, a large trader is any person whose transactions in NMS (National Market System) securities equal or exceed two million shares or $20 million in fair market value on any single day, or twenty million shares or $200 million in fair market value in any calendar month. Large traders must register with the SEC and are subject to enhanced record-keeping and reporting requirements.
Key takeaways
- The SEC's large trader reporting regime was established to enhance the agency's ability to reconstruct trading activity and investigate potential market manipulation and insider trading.
- Any person crossing the volume or value thresholds must file Form 13H with the SEC, disclosing identity and business affiliations.
- Registered large traders receive a Large Trader Identification Number (LTID), which must be provided to broker-dealers who must then attach it to order records.
- Broker-dealers must maintain records of transactions by large traders and produce them to the SEC within 24 hours upon request.
- Hedge funds with active trading programs that cross the thresholds must ensure their prime brokers have their LTID on file to facilitate compliance.
Explanation
The large trader reporting system, codified in SEC Rule 13h-1 adopted in 2011, was a direct response to regulators' difficulty in reconstructing trading activity during the 2010 Flash Crash. The SEC found that it lacked the data infrastructure to quickly identify which participants were responsible for large volumes of trading during market stress events. The large trader regime created a standardized identification system that sits alongside existing trade reporting obligations and allows regulators to rapidly pull trading records when needed.
The rule applies broadly to any 'person'—including individuals, corporations, partnerships, and investment advisers acting on behalf of their clients—who exceeds the defined trading thresholds. Most institutional investors, including hedge funds with meaningful AUM and active turnover, will cross these thresholds routinely. Upon exceeding the thresholds (or upon anticipating that they will do so), a person must file Form 13H within 10 days of the end of the calendar quarter in which the threshold was first crossed. Form 13H requires disclosure of the filer's legal name, address, type of organization, principal business, and a list of all broker-dealers through which they execute trades.
Once registered, the large trader receives an LTID and must provide it to all broker-dealers and introducing brokers through which it trades. Broker-dealers are then required to tag each order with the LTID in their electronic blue-sheet systems and to maintain records of all transactions executed for large traders. When the SEC issues a request—which can come without advance notice and must be honored within 24 hours—the broker-dealer must produce comprehensive records of the large trader's transactions including time stamps, prices, volumes, and order type. This 24-hour data access capability is a cornerstone of the SEC's market surveillance and enforcement infrastructure.
Form 13H must be updated annually and whenever material changes occur in the information previously reported, such as changes in business lines or additional broker relationships. A large trader can request 'inactive' status for periods when it does not anticipate crossing the thresholds, which reduces ongoing compliance burden. The regime intersects with the Investment Advisers Act in that investment advisers registered with the SEC often qualify as large traders when aggregating the trading activity of all accounts they manage.
For hedge funds, the practical compliance requirement is relatively straightforward: file Form 13H, communicate the LTID to prime brokers and executing brokers, and update the form promptly upon material changes. The primary compliance risk is forgetting to update the form when a new broker-dealer relationship is established or when the fund's trading thresholds change significantly.
Formula
Large Trader Threshold: ≥ 2,000,000 shares or $20,000,000 in fair market value per day; OR ≥ 20,000,000 shares or $200,000,000 per calendar month
Example
Titan Capital Management, a $2 billion equity long-short hedge fund, executes approximately 15 million shares per day across its managed accounts through various broker-dealers. This volume comfortably exceeds the 2 million share daily threshold under Rule 13h-1. The fund's compliance officer files Form 13H with the SEC, receives LTID number 12345-00001, and notifies all seven of its executing brokers by email, providing the LTID for inclusion in their order management systems. When the SEC investigates a potential front-running scheme in the shares of a technology company, the agency issues a 13H data request to Titan's prime broker at 4:00 p.m. on a Thursday, demanding all transaction records for that stock over the prior three months. The prime broker produces the records by noon the following day, consistent with the 24-hour requirement.
Related terms
Broker Dealer Equity Front Running Hedge Exemption Hedge Fund Insider Trading Investment Advisers Act Kyc Know Your Customer Prime Broker Qualified Purchaser Reporting Obligations Short Hedge