# Large Trader: What it is, How it Works, Special Considerations

> **Definition**
>
> A large trader is an investor or organization that executes trades meeting specific volume or market value thresholds set by the SEC, requiring them to register and report their trading activities.

## What Is a Large Trader?

A large trader is an investor or organization with trades that are equal to or exceed certain amounts as specified by the [Securities and Exchange Commission (SEC)](https://www.investopedia.com/terms/s/sec.asp). A large trader is defined by the SEC as "a person whose transactions in [National Market System (NMS)](https://www.investopedia.com/terms/n/nms.asp) securities equal or exceed two million shares or $20 million during any calendar day, or 20 million shares or $200 million during any calendar month."

Any market participant who is, by definition, a large trader must identify themselves to the SEC and submit Form 13H, "Large Trader Registration: Information Required of Large Traders Pursuant to Section 13(h) of the [Securities Exchange Act of 1934](https://www.investopedia.com/terms/s/seact1934.asp) and Rules Thereunder."

### Key Takeaways

*   A large trader is an investor or organization whose trades equal or exceed volume and market value thresholds established by the Securities and Exchange Commission (SEC).
*   Large traders are generally professional market participants and institutional investors that have the ability to buy and sell large blocks of securities.
*   Mutual funds, pension funds, hedge funds, banks, and insurance companies often fall into the category of large traders.
*   The SEC identifies large traders as any trader whose transactions in National Market Securities (NMS) equals or exceeds two million shares or $20 million during any calendar day, or 20 million shares or $200 million during any calendar month.
*   The SEC monitors the activity of large traders in order to analyze the impact of their activity on the markets, to identify activity that breaks securities laws, and to protect investors from manipulative market practices.

## Understanding Large Traders

The SEC initiated large trader reporting pursuant to the [Market Reform Act of 1990](https://www.congress.gov/bill/101st-congress/house-bill/3657) and in response to the development of trading technology that enables trading in substantial volumes and fast execution speeds. Large traders are typically professional market participants and large institutional investors such as mutual funds, pension funds, hedge funds, banks, and insurance companies.

Large traders have the ability to buy and sell large blocks of securities, such as stocks and bonds. In the Market Reform Act of 1990 and later proposals, the SEC cited the rising prominence of large traders and [high-frequency traders (HFTs)](https://www.investopedia.com/terms/h/high-frequency-trading.asp) in the markets and the need for improved access to their trading activity in NMS securities.

## Large Trader Reporting

Large trader reporting is intended to help the SEC identify individuals engaged in significant market activity and analyze the impact of their trading activity on the market. It also aids in SEC investigations and enforcement activities. Since 2011, the SEC requires that all traders who execute a substantial amount of trading activity, as measured by [volume](https://www.investopedia.com/terms/v/volume.asp) or market value, identify themselves to the SEC by registering with the SEC through Form 13H.

The SEC assigns each large trade an identification number, collects information, and analyzes each large trader's trading activity. The SEC assigns large traders a Large Trader Identification Number (LTID), which must be furnished to their respective [broker-dealers](https://www.investopedia.com/terms/b/broker-dealer.asp). The large trader must also identify to which accounts the LTID applies.

Registered broker-dealers must maintain records of their traders' LTIDs and executed transaction times, as well as monitor their clients' accounts for activity qualifying as large trading. Also, they must report transactions by large traders that equal or exceed the activity level or aggregate transactions in NMS securities. The SEC may request details of transactions, to which the broker-dealer must comply by transmitting information through the [Electronic Blue Sheets (EBS)](https://www.investopedia.com/terms/b/bluesheets.asp) system.

> **Important**
>
> The SEC uses the information gathered from the Electronic Blue Sheets system to analyze the causes of trading volatility and to determine if large traders are breaking any securities laws, such as those associated with insider trading.

## Special Considerations

Large traders must submit an initial filing through Form 13H and an annual filing for each applicable calendar year. In addition to annual updates, large traders are allowed to submit quarterly updates to the SEC if their information has changed or is inaccurate.

A large trader who has not conducted the identifying amount of trading activity as measured by volume or [market value](https://www.investopedia.com/terms/m/marketvalue.asp) may file for inactive status and can remain inactive and exempt from the filing requirements until the large trader trading level is made again. Those wanting to terminate their status must report the termination of its operations as a large trader on Form 13H during the next filing period.

> **Article Sources**
>
> 1.  U.S. Securities and Exchange Commission. "[Observations from Examinations of Broker-Dealers and Investment Advisers: Large Trader Obligations](https://www.sec.gov/files/Risk%20Alert%20-%20Large%20Trader%2013h.pdf)." Page 2.
>     
> 2.  U.S. Securities and Exchange Commission. "[17 CFR Parts 240 and 249, Large Trader Reporting System](https://www.sec.gov/files/rules/proposed/2010/34-61908.pdf)." Pages 6-8.
>     
> 3.  U.S. Securities and Exchange Commission. "[17 CFR Parts 240 and 249, Large Trader Reporting System](https://www.sec.gov/files/rules/proposed/2010/34-61908.pdf)." Pages 6-8, 13-14.
>     
> 4.  U.S. Securities and Exchange Commission. "[17 CFR Parts 240 and 249, Large Trader Reporting System](https://www.sec.gov/files/rules/proposed/2010/34-61908.pdf)." Pages 5-6.
>     
> 5.  U.S. Securities and Exchange Commission. "[Responses to Frequently Asked Questions Concerning Large Trader Reporting](https://www.sec.gov/divisions/marketreg/large-trader-faqs)."
>     
> 6.  U.S. Securities and Exchange Commission. "[17 CFR PARTS 240 and 249, Large Trader Reporting: Final Rule](https://www.sec.gov/files/rules/final/2011/34-64976.pdf)." Pages 1-2.
>     
> 7.  U.S. Securities and Exchange Commission. "[17 CFR PARTS 240 and 249, Large Trader Reporting: Final Rule](https://www.sec.gov/files/rules/final/2011/34-64976.pdf)." Pages 38-39.
>     
> 8.  U.S. Securities and Exchange Commission. "[17 CFR PARTS 240 and 249, Large Trader Reporting: Final Rule](https://www.sec.gov/files/rules/final/2011/34-64976.pdf)." Pages 39-43.