The Jim Simons Tracker: what it follows, what a 13F can and can't tell you about Renaissance Technologies, and how following works

I'm Chris, co-founder of Autopilot. The Jim Simons Tracker follows Renaissance Technologies' quarterly 13F filing. When the filing posts, up to 45 days after quarter end, the Portfolio updates and your account follows it. Renaissance has nothing to do with it, and Jim Simons, who founded the firm, died in May 2024. Here's what following Renaissance Technologies' public filing actually gets you, and what it can't.

One thing first, because we're an SEC-registered investment adviser and I have to say it. Autopilot is the app. The actual investment advice comes from Autopilot Advisers, LLC. If you want the full legal version of anything in here, it's on our legal page.

1) Who Simons was and what the tracker actually follows

Renaissance doesn't run this. We read what the firm files and follow it after the filing becomes public. A 13F can be filed any time after quarter end, but the deadline is 45 days.

In 1978, he started Monemetrics. The firm became Renaissance Technologies in 1982. Its Medallion Fund became famous for using mathematical models instead of traditional company research. Medallion has been closed to outside money for a long time; it's run for the firm's own people. Renaissance also runs funds that outside investors can buy into, and the firm, like every institutional investment manager that meets the SEC's $100 million threshold for Section 13(f) securities, files a Form 13F within 45 days after each quarter end covering its US long positions. The filer of record is Renaissance Technologies LLC.

The Jim Simons Tracker is a Portfolio that Autopilot Advisers built and runs from that filing. It launched on Autopilot on November 17, 2023. Renaissance isn't paid by it, doesn't know about it, and hasn't endorsed anything. Simons never did either, and I want to be clear about that because his name is on the Portfolio.

2) What a 13F shows for Renaissance, and what it hides

Two things make this filing different from a Buffett filing.

First, it's a window onto the wrong room. The returns everybody's heard about are Medallion's, and Medallion's positions are inside the same firm-level 13F as everything else Renaissance manages, mixed together with the public funds, with no label saying which is which. You can't read Medallion off the filing.

Second, the book is a quant's book. Thousands of positions, most of them small, held for reasons a model found in the data and no human would explain, with holding periods that can be days. A 13F is a picture of one day. For a manager who holds for years, that picture can still be mostly accurate when the filing appears. For a firm that turns over the way Renaissance does, the picture can be stale before it's even filed.

The rest is what every 13F hides, in What's a 13F, and can you actually see what Warren Buffett bought last quarter?. No shorts, and Renaissance runs a lot of them. No timing, no prices, no futures, no currencies. 13Fs don't have a purchase date. They only have the ending date.

3) How the tracker turns the filing into a Portfolio

What I can say without checking: it has to be a subset, and the selection rule is the Portfolio. The filing is the raw material. What you're following is the rule we apply to it, which is why the fact sheet matters more than the filing here.

4) How it runs in your account

You connect the brokerage you already have, pick the Jim Simons Tracker, and set how much follows it. Then you give Autopilot Advisers limited authority to send orders to that account. When the Portfolio changes, we send them and your broker fills them. The money stays put.

You're never trading at the same time as Renaissance. Nobody outside the firm ever is.

5) What to check on the fact sheet before you follow it

The Jim Simons Tracker fact sheet shows what real client accounts following it did from November 17, 2023, gross and modeled net, with drawdown, volatility, a risk band, and a date on every figure. It's a live composite of follower accounts. It is not Medallion's return, it's not the public funds' return, and it's not a backtest of Simons' record. If anyone tells you a Simons tracker gets you Medallion, they're selling you something.

I wrote how to read the sheet in How to read a Portfolio's track record before you follow it.

6) The limits, plainly

The filing starts you behind the fastest-turning book on this list. Sometimes by days. Sometimes by months. You're getting a slice of the long side of a firm whose edge lives in the shorts, the futures, and the speed, none of which a 13F shows. You can't see Medallion. Position sizes aren't theirs. If what you want is Renaissance's results, they're not for sale to you or to me. If you want to follow the disclosed long side of the firm's public book, with the rule we apply printed on a fact sheet, that's what this is.

Frequently asked questions

What stocks does Renaissance Technologies hold?

The public record is Renaissance's quarterly 13F on the SEC's EDGAR site, filed within 45 days after each quarter end, listing the firm's long US positions as of quarter end across all its funds together. It runs to thousands of names and leaves out shorts, futures, and anything sold inside the quarter. I don't reprint holdings here because this page doesn't change. Autopilot's Jim Simons Tracker follows a subset of the filing after it posts.

Jim Simons Renaissance 13F latest filing

Renaissance Technologies' most recent 13F is on EDGAR under the firm's name, filed up to 45 days after the quarter ended. It covers the firm's whole US long book, so it doesn't separate the Medallion Fund from the funds outside investors can buy. Autopilot's Jim Simons Tracker is a Portfolio built from those filings, launched November 17, 2023, with a public fact sheet.

Can I follow Renaissance Technologies' trades?

Not the trades. Nobody outside the firm sees those, and its famous Medallion Fund is closed to outside money. What you can follow is the firm's quarterly 13F, which shows long US positions as of quarter end after the filing becomes public. Autopilot's Jim Simons Tracker does that in your own brokerage account, following a subset of the filing, with the delay disclosed on its fact sheet.

TLDR

Renaissance files a 13F within 45 days of quarter end covering thousands of positions across all its funds. The Jim Simons Tracker follows a slice of it, in your own brokerage, with the money staying put. It isn't Medallion and nothing is. Read the fact sheet. If the slice fits, choose a Portfolio and connect your brokerage. Then give Autopilot Advisers limited authority to send orders to that account. When the Portfolio changes, we send them and your broker fills them. Depending on your plan and brokerage, you may need to confirm first. The money stays put.

Start Investing

Since Autopilot Advisers is an SEC-registered investment adviser, we have to put disclaimers on stuff like this. They're below, and the full version is on our legal page.

Disclosures

© Autopilot Holdings Corporation 2026 — All rights reserved. “Autopilot” refers to Autopilot Holdings Corporation and its wholly-owned, and separately managed subsidiaries, including Autopilot Advisers, LLC, an SEC-registered investment adviser. All investing is subject to investment risks, including possible loss of the principal invested, and past performance is not indicative of future results. View our Customer Relationship Summary and other important information at joinautopilot.com/legal.

This information is provided by Autopilot for educational and illustrative purposes only and is not a recommendation, an offer to sell or the solicitation to buy any security. Autopilot relies on information from various sources believed to be reliable, including information from Clients, Pilots and other third parties, but cannot guarantee the accuracy or completeness of that information. Autopilot does not provide tax or legal advice and you are encouraged to consult with professionals before making investment decisions.

Autopilot is not affiliated with, sponsored, or endorsed by the companies listed, described, or featured on its site. Company logos or trademarks used do not imply endorsement and are the property of their respective owners.

Investing involves risk, including the possible loss of principal. Past performance does not guarantee future results. You should carefully consider your investment objectives, risk tolerance, and time horizon before investing through Autopilot.

Autopilot Advisers, LLC is an SEC-registered investment adviser. Registration as an investment adviser does not imply a certain level of skill or training. Additional information about Autopilot is available in our Form ADV Part 2A, available at adviserinfo.sec.gov or joinautopilot.com/adv.

Autopilot provides limited investment advisory services focused on Portfolio selection and suitability assessment. Our services are not intended to replace comprehensive financial planning. We recommend consulting with a qualified financial advisor regarding your complete financial situation.

This content is provided for educational and informational purposes only. It does not constitute investment, legal, or tax advice and should not be relied upon as the basis for any investment decision. You should consult with qualified professionals regarding your specific circumstances.

Autopilot does not provide tax, legal, or accounting advice. You should consult with qualified tax and legal professionals regarding your specific circumstances.

Autopilot does not hold client assets. All investments are held at the brokerage firm you select and connect to Autopilot. Your brokerage firm is responsible for trade execution, custody, and reporting. Autopilot is not responsible for your broker-dealer’s services, fees, or execution quality.

Autopilot’s services depend on technology systems, third-party APIs, and internet connectivity. System outages, API disruptions, or connectivity issues may temporarily affect service availability or trade execution timing.

Client account holdings are designed to track the Portfolio you’ve selected, but your actual holdings and performance may differ from the Portfolio due to execution timing, market conditions, brokerage capacity constraints, fractional share availability, and other factors outside Autopilot’s control.

For Portfolios inspired by publicly disclosed trading activity, there may be a delay between when a Pilot executes a trade and when that trade becomes publicly available and is incorporated into the Portfolio. This timing delay may affect the suitability or performance of trades when executed in client accounts.

Renaissance Technologies and the estate of James Simons are not affiliated with Autopilot and have not endorsed it. The Jim Simons Tracker is created and managed by Autopilot Advisers, LLC from public Form 13F filings; Renaissance does not manage this Portfolio and has no relationship with Autopilot or its clients. Statements about the Medallion Fund and the firm's history are general public knowledge as of the publish date and are. References to Renaissance's disclosed positions describe public filings and are not a performance claim or a recommendation.