Ken Griffin's Stock Trades in Q2 2026: Full Breakdown

Ken Griffin's Stock Trades in Q2 2026: Full Breakdown

Citadel Advisors filed its Q2 2026 13F on time, reporting an $875.1 billion portfolio spread across 13,575 positions. The filing shows no new buys, no position increases, no sales, and no full exits. For a fund managing this amount of capital, the lack of disclosed trading activity this quarter suggests a holding pattern across the board.

!Citadel's Top 10 Holdings by Portfolio Weight. IVV an S&P 500 index fund dwarfs all equity positions at 1.5% of the $875.1B book. Individual stocks cluster at 0.1% to 0.3%.

What did Ken Griffin buy this quarter?

Nothing. The filing discloses zero new positions or increased holdings. For context, a 13F covers long equity positions reported within 45 days of quarter-end. Citadel's most recent filing is a snapshot of what it held on June 30, 2026, with no new additions reported versus the prior quarter.

This does not mean Griffin's traders sat idle. A 13F captures only long stock holdings above certain thresholds and excludes options, futures, bonds, and short positions. It also lags market activity by six weeks. But as filed, the document shows no equity purchases to disclose.

What did Ken Griffin sell this quarter?

No positions were reduced or closed. The filing lists no exits and no decreases in existing holdings. The portfolio composition held steady from the prior quarter's end.

Where is Citadel actually concentrated?

The top 10 holdings make up just 3.1% of the total $875.1 billion book. That concentration ratio is extraordinarily flat. IVV, the iShares Core S&P 500 ETF, is Citadel's single largest position at 1.5% of assets. Everything else fragments below 0.3%.

This structure tells you what kind of firm Citadel is. It is not a focused stock picker. It is a massive multi-strategy operation running 13,575 separate positions, most of them tiny relative to the whole. Individual stock bets move the needle for a $50 billion concentrated hedge fund. At $875 billion, a 0.1% position is $875 million, but the dilution is real.

What is Citadel's biggest single stock bet?

Amazon at 0.3% of the portfolio, or roughly $2.6 billion notional. Nvidia is equally sized at 0.3%. Apple follows at 0.2%, Microsoft at 0.2%.

None of these bets are dominant. The largest single-stock position is smaller than the passive index fund holding. That reflects either genuine conviction that diversification beats big bets, or simply the mathematics of running $875 billion where no single stock can move the needle more than a few basis points, even at 1% of the portfolio.

How overvalued or undervalued are Citadel's holdings?

SteadyShares' valuations reveal mixed conviction. Microsoft is the least overvalued in the top 10, trading only 3% above fair value on our model. Amazon is 25% overvalued. Nvidia is 50% overvalued. Apple is 23% overvalued.

The outlier is Broadcom at 0.1% of the portfolio, which trades at 395% of fair value on our estimate. That is not a typo. The stock is absurdly expensive by fundamental measures. Citadel holding it suggests either that valuation models are broken, or the position was inherited and never exited, or it was purchased at a much lower price and has since run away.

Why would Citadel hold such expensive stocks?

A 13F does not explain motive, only position. The fact that Nvidia, Google, and Broadcom are trading at massive premiums to intrinsic value does not tell you whether Citadel bought them at those prices, bought them years ago at cheaper prices, or views valuation differently than SteadyShares does.

What the filing does show is that Citadel made no moves to trim these positions this quarter, despite their valuations. It also did not add to them. Holding and waiting is itself a statement, though the statement is ambiguous.

How diversified is Citadel's portfolio?

Very. Across 13,575 positions, no single holding exceeds 1.5% of assets. The median position is invisible: less than 0.01% of the portfolio. This is the opposite of the concentrated bets that made Citadel famous in earlier eras. The modern Citadel is a closet index fund with 13,575 extra layers of decision.

You can verify this structure yourself on Citadel Advisors' SteadyShares profile, which tracks changes in their filings over time.

The bottom line

Citadel's Q2 2026 filing is a non-event: $875 billion held steady with no disclosed trades. For a mega-cap index fund disguised as a hedge fund, that is entirely consistent. The real news would be the day this changes.

This is educational information, not financial advice.