Alkeon Capital Q4 2025: $63B Rebuild, 47% in SPY+QQQ

Alkeon Capital Management ended 2025 with $63.13B in 13F-reported assets across 201 positions. That number is unremarkable on its own — a growth-focused manager near $60B sits comfortably inside the active discretionary tier. What is remarkable is how Alkeon got there. The fund's AUM trajectory over the past three quarters looks nothing like an active stock-picking book and everything like a balance sheet being managed for liquidity and beta capture.

The headline datapoint sits inside the top two positions: SPY at 24.12% and QQQ at 22.91%. Together they account for 47.03% of the entire 13F portfolio. For an active manager benchmarked against U.S. large-cap growth, those two ETF lines are not stock picks — they are beta substitutes.

The AUM Trajectory

Alkeon's recent quarter-over-quarter sequence reads like two distinct funds operating under one CIK. The fund ran between $48B and $60B for five quarters from 2024Q1 through 2025Q2. Then Q3 2025 prints at $34.36B with only 102 positions — a 42.7% drop in reported value and roughly half the position count. One quarter later, Q4 2025 lands at $63.13B with 201 positions, an 83.7% jump.

The natural reading of that shape is that Q3 was either a major redemption window or a deliberate liquidation into cash, and Q4 was a redeployment of fresh assets into liquid beta while the active book was rebuilt name-by-name. The 47% SPY+QQQ allocation in Q4 is consistent with the second interpretation: parking capital in deeply liquid index ETFs is how a fund moves $30B of inflows in a single quarter without paying market-impact costs on individual names.

The Top Holdings Tape

Outside the two ETF anchors, the active book looks like a textbook U.S. large-cap growth tape: TSM at 3.66%, GOOGL at 3.12%, AMZN at 2.89%, LRCX at 2.83%, MSFT at 2.66%, NVDA at 2.28%, KLAC at 2.14%, META at 2.08%. Semis (TSM + LRCX + NVDA + KLAC) account for 10.9% of the portfolio. Mega-cap consumer/cloud (GOOGL + AMZN + MSFT + META) accounts for another 10.75%.

The semiconductor sub-cluster is the meaningful active expression. TSM + LRCX + KLAC together is a foundry-and-equipment thesis, not a generic chip overweight. LRCX (Lam Research) and KLAC (KLA) are wafer-fab equipment names — the upstream end of the AI capex spend, less volatile than the design-and-IP end represented by NVDA. The pairing reads as a manager hedging the AI thesis: long the picks-and-shovels (LRCX/KLAC), long the foundry (TSM), and modestly sized on the chip designer (NVDA at 2.28%).

Concentration: Real or Optical

Reported concentration metrics are striking: Top-1 at 24.12%, Top-5 at 56.66%, Top-10 at 68.65%. Strip the two ETF anchors and the picture changes. Excluding SPY and QQQ, Alkeon's largest single active position is TSM at 3.66% of total AUM, or roughly 6.9% of the active book. Top-5 active positions (TSM/GOOGL/AMZN/LRCX/MSFT) sum to 15.16% of total AUM, or about 28.6% of the active book. Top-10 active positions sum to roughly 38.2% of the active book.

Those are normal numbers for a growth-tilted active manager. The headline concentration is being distorted by the ETF parking positions. A reader who looks at the 24% top-1 and thinks "high-conviction concentrated book" is misreading the data. The active conviction lives in the 3-4% positions, not in SPY.

WhaleScore and the Active Conviction Question

Alkeon carries a WhaleScore of 73.50, which puts it in the upper-middle of our smart-money universe. WhaleScore rewards three things: portfolio concentration, active discretion (vs. passive mandates), and historical alpha. The 73.50 reading is a hybrid signal here — the concentration component is inflated by SPY/QQQ, the discretion component is dampened by the same lines, and the historical alpha component is what carries the score above the 65-70 range typical of mid-tier active managers.

For investors using WhaleScore to weight conviction signals, the lesson is to treat the score as a starting point, not a verdict. Alkeon's 73.50 reflects an 89-quarter track record (filing back to 2003) more than a Q4 2025 conviction read. If the Q4 2025 ETF parking is the new steady state, the score will compress over future quarters as the concentration metric drops.

What to Watch Next

1. Q1 2026 13F (due May 15, 2026). Whether SPY+QQQ stays at 47% or compresses toward zero is the cleanest single signal. A drop below 20% combined says the fund is fully redeployed into active names; a sustained 40%+ says the ETF allocation is structural, not transitional.
2. The semiconductor weighting. If the TSM/LRCX/KLAC trio expands at the expense of NVDA, the foundry-equipment thesis is being run more aggressively. If NVDA grows and the equipment names shrink, the manager is shifting toward design-side AI exposure.
3. Position count. Q3 2025 ran 102 holdings; Q4 2025 jumped to 201. A return toward the 175-189 range of 2024 would suggest the post-redemption rebuild has stabilized. A drift back toward 102 would suggest the fund is sizing down again.

The Read

Alkeon's Q4 2025 filing is a portfolio in transition, not a portfolio at rest. The 47% SPY+QQQ allocation is the obvious story; the more interesting story is what the underlying 53% says when you read it as the actual active book. Foundry-and-equipment semiconductor exposure (TSM/LRCX/KLAC), a balanced mega-cap cloud allocation (GOOGL/AMZN/MSFT/META), and a long tail of growth names is a recognizable Alkeon shape. The ETF anchors are scaffolding. The question for Q1 2026 is whether the scaffolding comes down.

Track Alkeon's full quarterly history, position changes, and WhaleScore evolution at /filers/alkeon-capital-management-llc-0001230239. Cross-reference active-manager benchmarks at /filers and quarterly signal flow at /insights.