Citadel's incredibly successful hedge fund performance has helped make CEO Ken Griffin a billionaire.

Investors can get a look at Citadel's moves each quarter with the company's 13F filing.

Citadel held more than 14,300 stock positions as of its last update, but a handful of stocks account for a relatively large share of the portfolio.

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Ken Griffin has the distinction of being one of history's most successful investors. The billionaire founded and leads Citadel Advisors -- the most profitable hedge fund of all time.

While not all of Griffin and Citadel's trades are immediately made public, disclosure requirements from the Securities and Exchange Commission (SEC) mean that the hedge fund's holdings are disclosed quarterly through 13F filings. Read on for a look at Citadel's five largest stock holdings.

Citadel's technology- and analytics-focused approach to portfolio construction and history of market-crushing performance make the hedge fund's holdings a point of interest for many investors. These are the fund's five biggest stock positions as of the company's most recent public disclosure:

Charles Schwab (NYSE: SCHW) is a longtime leader in financial services and stands as Citadel's top stock holding. The stock accounted for roughly 1.6% of Citadel's total stock portfolio as of the company's last update.

Invesco QQQ Trust (NASDAQ: QQQ) is an exchange traded fund (ETF) that tracks the Nasdaq-100 index and accounted for 1.1% of Citadel's holdings as of the most recent public update.

Edwards Lifesciences (NYSE: EW) is a medical technology specialist focused on services for patients with heart-valve disease and accounted for 1% of Citadel's stock portfolio weight.

Medtronic (NYSE: MDT) is a medical company that makes devices used to treat and manage a wide range of health issues, and its stock recently represented roughly 0.8% of Citadel's portfolio holdings.

Keurig Dr Pepper (NASDAQ: KDP) is a beverage giant that produces and markets a portfolio of globally known drinks. It recently made up roughly 0.7% of Citadel's stock holdings.

Notably, Hess had been Citadel's second-largest position and accounted for roughly 1.3% of the fund's stock holdings as of the company's last 13F filing, but the energy company was acquired by Chevron in July in a $55 billion all-stock deal. If Griffin and Citadel opt to hold on to the Chevron stock received through the buyout, the fund could show a new top-five holding with its next 13F filing.

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Charles Schwab is an advertising partner of Motley Fool Money. Keith Noonan has no position in any of the stocks mentioned. The Motley Fool has positions in and recommends Chevron and Edwards Lifesciences. The Motley Fool recommends Charles Schwab and Medtronic and recommends the following options: long January 2026 $75 calls on Medtronic, short January 2026 $85 calls on Medtronic, and short September 2025 $92.50 calls on Charles Schwab. The Motley Fool has a disclosure policy.

Here Are Billionaire Ken Griffin's 5 Biggest Stock Holdings was originally published by The Motley Fool