# What is Ken Griffin buying? What Citadel's latest 13F shows, and how the Citadel Tracker follows it

URL: https://start.joinautopilot.com/journal/follow-citadel-in-your-brokerage
Updated: 2026-10-13

I'm Chris, one of the co-founders of Autopilot.

Open it in the Autopilot app. https://link.joinautopilot.com/eXKr?c=follow-citadel-in-your-brokerage&af_sub1=intro

Short answer: a 13F can't show what Ken Griffin is buying right now. What it shows is what Citadel held on June 30, 2026, in its latest one.

That filing, amended on September 2, lists 7,164 securities worth $875 billion. About 80% of that value is options. The biggest stock positions are an S&P 500 ETF, Amazon, Nvidia, Apple, and Microsoft.

Let me explain what's in it, what changed, and what it can't tell you.

1) Ken Griffin and Citadel

For those unaware, Ken Griffin founded Citadel. Citadel Advisors' Form ADV lists him as Chief Executive Officer and Co-Chief Investment Officer, with Pablo Salame as the other Co-CIO. Its brochure calls him the "Founder, Chief Executive Officer and Co-Chief Investment Officer" of the entities that control the firm.

To put the size into context:

- $570.6 billion in regulatory assets under management, per the Form ADV last updated June 11, 2026. Under the SEC's instructions, that number doesn't subtract what the funds owe.
- About 3,284 employees, not counting clerical workers, with 1,314 of them doing investment advisory work, including research.

And the decisions come from many teams. The brochure says Citadel's portfolio management teams "often invest independently of one another" and can hold "economically offsetting positions."

2) The filing

Citadel's latest is Form 13F-HR/A, accession 0001104659-26-104387, for June 30, 2026, filed September 2. It restates the original from August 14, and the new total is $84.5 million lower. As of October 13, there's no newer amendment. It has 16,122 lines, which add up to 7,164 securities.

Type | Lines
Reported value | % of total
Call options | 4,014
$365,564,825,827 | 41.78%
Put options | 3,613
$335,310,602,789 | 38.32%
Stock, ETFs, and convertible notes | 8,495
$174,136,365,721 | 19.90%
A 13F doesn't report what an option costs. Under Form 13F's instructions, an option line shows the shares underneath it and their value. There's no strike price and no expiration date. So you can't tell if a put is a hedge or a bet.

The tricky part? The filing covers more than the hedge fund. Citadel's brochure describes two separate units: Citadel, the investment firm, and Citadel Securities, a global market maker. For June 30, Citadel Securities GP LLC filed a 13F notice saying its holdings are in Citadel Advisors' report.

About 84% of the filing's value, $734.5 billion, sits on lines where Citadel Advisors reports sharing investment discretion with Citadel Securities GP LLC. Nearly every big option line is one of them.

3) The top 15 stock and ETF positions

Stock and ETF lines only, no options, added up by security:

# | Company | Shares | Reported value | % of total
1 | iShares Core S&P 500 ETF | 17,676,489 | $13,237,745,847 | 1.51%
2 | Amazon | 10,882,003 | $2,593,616,595 | 0.30%
3 | Nvidia | 11,815,467 | $2,364,156,792 | 0.27%
4 | Apple | 7,296,076 | $2,111,192,551 | 0.24%
5 | Microsoft | 3,770,405 | $1,406,436,474 | 0.16%
6 | Electronic Arts | 5,906,884 | $1,211,147,495 | 0.14%
7 | Warner Bros. Discovery | 44,587,810 | $1,188,711,014 | 0.14%
8 | Eli Lilly | 945,456 | $1,134,008,290 | 0.13%
9 | Broadcom | 2,901,715 | $1,096,122,842 | 0.13%
10 | Alphabet (Class A) | 2,990,581 | $1,068,743,932 | 0.12%
11 | BlackRock | 1,097,186 | $1,055,010,170 | 0.12%
12 | Advanced Micro Devices | 1,599,430 | $929,124,881 | 0.11%
13 | Alphabet (Class C) | 2,545,533 | $899,413,175 | 0.10%
14 | SpaceX (Class A) | 5,129,884 | $876,491,980 | 0.10%
15 | AbbVie | 3,169,783 | $797,644,194 | 0.09%
Values are as of June 30, 2026. Percentages are of the $875 billion total and are rounded.

To put that into context, these 15 add up to $32.0 billion, under 4% of the filing.

4) The biggest option positions

Option lines only, added up by security and by put or call:

# | Security | Put or call | Shares underneath | Reported value | % of total
1 | SPDR S&P 500 ETF Trust | Call | 47,748,200 | $35,656,923,314 | 4.08%
2 | Invesco QQQ Trust | Put | 36,059,900 | $26,554,510,360 | 3.03%
3 | Invesco QQQ Trust | Call | 31,899,300 | $23,490,644,520 | 2.68%
4 | SPDR S&P 500 ETF Trust | Put | 31,154,800 | $23,265,469,996 | 2.66%
5 | Micron Technology | Put | 19,275,300 | $22,249,286,037 | 2.54%
6 | Micron Technology | Call | 14,155,700 | $16,339,782,953 | 1.87%
Citadel lists both puts and calls on each of these. Without strikes and expiration dates, you can't tell what the two add up to.

5) What changed since March 31

The March 31 13F listed 6,733 securities worth $618.5 billion. By June 30, it was 7,164 securities and $875.0 billion, and options went from 77% of the value to 80%.

The moves that stand out:

- iShares Core S&P 500 ETF: 13,615,739 more shares, to 17,676,489. It's now the largest stock or ETF position in the filing.
- Abbott Laboratories: 6,681,381 more shares, to 8,597,227.
- SpaceX Class A: new, 5,129,884 shares worth $876.5 million.
- Nvidia: 6,849,394 fewer shares, to 11,815,467.
- Micron: 3,995,849 fewer shares of stock, to 600,523. The Micron puts and calls both grew.
- SPDR S&P 500 ETF Trust: calls went from 27,028,000 shares underneath to 47,748,200, and puts went from 37,190,200 to 31,154,800.

6) What's happened since June 30

A 13F is a snapshot. No filing shows Citadel's whole portfolio after June 30.

What does show up is Schedule 13G. For those unaware, it's the short form big holders file after they pass 5% of a company's stock and aren't trying to influence it. Since June 30, Citadel entities have filed new 13Gs on at least 13 companies. Four report events after June 30: Bitdeer (July 20), FuelCell Energy (July 28), Core Scientific (July 29), and IREN (September 23). In all four, most of the shares sit with Citadel Securities. Holdings are as of each filing date, so three of the four read under 5%.

Ken Griffin is listed on each one as a reporting person. The filings say he owns a controlling interest in Citadel GP LLC and Citadel Securities GP LLC.

Source: SEC EDGAR, Citadel Advisors Form 13F-HR/A filed 9/2/26; Citadel Schedule 13G filings through 10/6/26.

7) What a 13F can't tell you

Here's the problem. 13Fs don't have a purchase date. They only have the ending date.

So you don't know if Citadel bought those Amazon shares in April or on June 29, or what it paid.

A few more things:

1. It's the firm. It combines many teams and Citadel Securities, and it doesn't say which team holds what.
2. Options come without strikes or expiration dates.
3. It leaves out short positions and any options Citadel writes, per the SEC's 13F FAQ.
4. It's late. A 13F can show up 45 days after the quarter ends.

8) The Citadel Tracker on Autopilot

Autopilot Advisers builds the Citadel Tracker from Citadel's 13F filings. Citadel doesn't run this Portfolio, and neither does Ken Griffin.

Its method: it takes the 15 largest holdings in Citadel's latest 13F and rebalances with each new one. If there's a tie for 15th, it takes the company with the largest market cap.

As of October 13, it holds 15 stocks and ETFs: the iShares Core S&P 500 ETF, the SPDR S&P 500 ETF Trust, Meta, Apple, Nvidia, Microsoft, Tesla, Amazon, Alphabet Class A and Class C, SpaceX Class A, Berkshire Hathaway Class B, SPDR Gold Shares, Broadcom, and Goldman Sachs. It doesn't hold options or shorts.

Those are the tracker's holdings today. Its weights are its own, not the filing's percentages, so check the Portfolio in the app for the current mix.

It's been on Autopilot since January 23, 2023, and its performance chart in the app starts that day. The next 13F, for September 30, is due Monday, November 16, 2026.

9) How following it works

It's three steps. You connect the brokerage account you already have. You pick a Portfolio. You allocate the money.

You give Autopilot Advisers limited authority to place trades. It can't move or withdraw your money. The money stays in your account.

On Premium Tier, when the Portfolio changes, we send the orders to your broker where your broker allows it. On Basic Tier, there's no Autopilot fee: we send your broker your starting allocation, then alert you when it changes. The Citadel Tracker is part of Autopilot Premium, $29.99 a quarter or $99.99 a year as of October 9, 2026. The details are in What does Autopilot cost?

As of October 9, 2026, more than $2 billion is invested through Autopilot, and we have over 250,000 users.

I want to be honest with you. Following a filing means following it late, and the Citadel Tracker holds shares, not Citadel's options. Some Portfolios go up for years, some are flat for years, and some lose money. Research the person and the Portfolio before you put money in.

More trackers built from public filings are in Hedge fund and Wall Street Portfolios. Steve Cohen's firm gets the same breakdown in Point72's latest 13F holdings.

TLDR: A 13F can't show what Ken Griffin is buying today. Citadel Advisors' 13F for June 30, 2026, amended September 2, lists 7,164 securities worth $875 billion, about 80% of it options. About 84% of the value sits on lines shared with Citadel Securities, the market maker. The biggest stock positions are the iShares Core S&P 500 ETF, Amazon, Nvidia, Apple, and Microsoft. The Citadel Tracker holds 15 stocks and ETFs and rebalances with each 13F, the next due November 16, 2026.

Frequently asked questions

What is Ken Griffin buying right now?

A 13F can't show that. The latest one is Citadel Advisors' 13F for June 30, 2026, amended September 2: 7,164 securities worth $875 billion, about 80% of it options. The largest stock positions are the iShares Core S&P 500 ETF, Amazon, Nvidia, Apple, and Microsoft. The filing covers many teams and Citadel Securities, and doesn't say who made which call.

What are Citadel's top 13F holdings?

By stock and ETF positions, Citadel's June 30, 2026 13F is led by the iShares Core S&P 500 ETF (2.6 billion), Nvidia (2.1 billion), and Microsoft ($1.4 billion). The largest positions overall are options, led by calls on the SPDR S&P 500 ETF Trust with $35.7 billion in shares underneath. Options are about 80% of the $875 billion total.

Is there a Ken Griffin portfolio tracker app?

Yes. The Citadel Tracker on Autopilot is a Portfolio Autopilot Advisers builds from Citadel Advisors' public 13F filings. It holds 15 stocks and ETFs from the latest filing and rebalances when a new one comes out. Citadel and Ken Griffin don't run it. You follow it in the brokerage account you already have.

Is there a Citadel portfolio tracker?

Yes, the Citadel Tracker on Autopilot, live since January 23, 2023. As of October 13, 2026, it holds 15 stocks and ETFs, including two S&P 500 ETFs, Nvidia, Apple, Microsoft, Amazon, Meta, Tesla, and Alphabet. It holds shares only, no options or shorts, and rebalances with each new 13F.

How can I follow Citadel's trades in my own brokerage?

You can't follow Citadel's trades as they happen. You can follow a Portfolio built from its filings. On Autopilot, you connect the brokerage account you already have, pick the Citadel Tracker, and allocate money. On Premium Tier, Autopilot Advisers sends the orders when it rebalances. It follows the 13F, so it's always behind Citadel. https://link.joinautopilot.com/eXKr?c=follow-citadel-in-your-brokerage&af_sub1=body

Does Ken Griffin pick Citadel's stocks?

Citadel's own filings say its decisions come from multiple portfolio management teams. Griffin is the founder, CEO, and Co-Chief Investment Officer, and Citadel Advisors' Form ADV lists Pablo Salame as the other Co-CIO. Its brochure says the teams often invest independently and can hold offsetting positions. A 13F reports the whole firm's holdings and doesn't say who made any decision.

Why are most of Citadel's 13F holdings options?

The filing doesn't say why. Two things to know. A 13F lists the value of the shares underneath each option, not what the option cost. And about 84% of the June 30, 2026 filing's value is on lines where Citadel Advisors shares investment discretion with Citadel Securities GP LLC, part of Citadel Securities, the market maker. Calls and puts are about 80% of the $875 billion.

When is Citadel's next 13F due?

The 13F for the quarter that ended September 30, 2026 is due Monday, November 16, 2026, 45 days after the quarter ends, moved to the next business day. The SEC doesn't grant extensions. Citadel filed its last four 13Fs on November 14, 2025, February 17, 2026, May 15, 2026, and August 14, 2026.

Open it in the Autopilot app. https://link.joinautopilot.com/eXKr?c=follow-citadel-in-your-brokerage&af_sub1=end

"Autopilot" refers to Autopilot Holdings Corp and Autopilot Advisers, LLC, an SEC-registered investment adviser. Individual stocks shown are illustrative and not a recommendation. Investing carries risk-including possible loss of principal-and past performance is not indicative of future results. Figures current as of 10/13/26. View our Customer Relationship Summary and other important info at joinautopilot.com/disclaimer.

Portfolios and pilots mentioned in this article:
Citadel Tracker (Autopilot): https://start.joinautopilot.com/strategies/citadel-tracker-45607
Returns as of October 19, 2026. Month -1.4%, 3 months +3.1%, YTD +14.2%, 1 year +22.7%, Since start +120.6%.