--- title: "Altimeter Capital 2025Q4: 23% NVDA Bet, Top Four Are 58% of Book" type: research slug: altimeter-capital-2025q4-nvda-concentration canonical_url: https://13finsight.com/research/altimeter-capital-2025q4-nvda-concentration published_at: 2026-05-11T08:42:45.340Z updated_at: 2026-05-11T08:42:48.374Z author: Marcus Chen author_title: Senior Market Analyst author_url: https://13finsight.com/authors/marcus-chen word_count: 947 locale: en source: 13F Insight --- # Altimeter Capital 2025Q4: 23% NVDA Bet, Top Four Are 58% of Book > Brad Gerstner's Altimeter Capital reported $6.66B in 2025Q4 13F value across just 18 positions, with NVIDIA at 22.68% of book and the top four positions accounting for 57.91% of AUM. We unpack the concentration profile, the AUM swing pattern, and how Altimeter compares to the focused-tech peer set. Brad Gerstner's Altimeter Capital Management is, on the surface, one of the cleanest read-throughs of the public-market AI thesis: a focused book, 18 positions, $6.66B reported AUM at quarter-end 2025Q4. What makes the filing worth a second look is not the AUM headline — it's the path the fund took to get there. The Altimeter 13F shrank from $6.51B in 2024Q1 to $3.19B in 2025Q1 (a -42.5% quarter), then snapped back to $6.93B in 2025Q2 (+117.3%) and held near that level into 2025Q4. That is not market-driven NAV movement. That is a manager who pulled risk down hard, then re-leveraged into a different concentration profile. The current concentration profile is what this piece unpacks. The 2025Q4 holdings map Altimeter's 2025Q4 disclosure puts $1.51B (22.68% of AUM) in NVIDIA, $1.22B (18.28%) in Meta Platforms, $617.8M (9.27%) in Microsoft, and $511.4M (7.68%) in Amazon. Those four positions alone are 57.91% of the fund. Reading the top four as "passive mega-cap tech beta" misses the structure — Gerstner has historically held this group with size, but the 2025Q4 NVDA weighting is a deliberate doubling-down rather than a default S&P allocation, and the META weighting at 18.28% is well above any reasonable passive benchmark exposure. The middle of the book is where the differentiation shows. Uber at $456.7M (6.85%), Snowflake at $444.8M (6.68%), TSMC at $370.5M (5.56%), and Coupang at $369.8M (5.55%) are the kind of positions an AI-thesis fund holds when it wants to own the inference layer (NVDA, MSFT, AMZN), the application layer (META, SNOW), and the marketplace beneficiaries (UBER, CPNG) in a single book. CoreWeave at $230.1M (3.45%) is the cleanest tell — it is a pure-play AI infrastructure name that retail investors had not heard of 18 months ago and that Altimeter underwrote at IPO. Concentration is the real story The pie chart below shows where the dollar weight actually sits — top 8 holdings, with the residual book (10 names totaling roughly 11% of AUM) collapsed into a single slice. The pattern is a barbell: four mega-cap AI-cycle compounders plus four mid-cap AI beneficiaries, with no exposure outside that thesis. That concentration profile is not unique to Altimeter — Pershing Square, Sands Capital, and Akre Capital all run sub-25-position books. What is unique is the speed at which Altimeter rotates the residual 11% of book. Across 2024Q1 to 2025Q4, the fund moved from 17 to 24 to 14 to 18 to 18 positions while holding the top 8 names roughly stable. That is a fund using the long tail of the book as tactical inventory while the core compound positions stay anchored. The AUM swing has to be interpreted carefully The dramatic -42.5% / +117.3% quarters in 2025Q1 and 2025Q2 cannot be read as a simple market-timing call. Altimeter operates pooled hedge funds with quarterly redemption windows. A -42.5% AUM print can reflect a single large LP redemption being filled, not a Gerstner directional view. The +117.3% rebound similarly reflects new commitments being deployed plus mark-to-market gains during the H1 2025 AI re-rating. What we can read into the AUM history is the path the manager chose during the rebound: rather than diversifying into a 30-40 position book to absorb the new capital, Altimeter put the rebuilt AUM right back into a tightly held 18-position book with the same top-of-book concentration profile. That signals high conviction in the existing thesis — the new capital was treated as more rope for the same trades, not a mandate to broaden. How Altimeter compares against the focused-tech peer set For retail investors trying to position around the broader AI-thesis fund universe, the natural peer set is concentrated tech-focused books with similar AUM ranges. Coatue, Tiger Global, D1, ICONIQ, and Whale Rock all run similar mandates with sub-30 position cores. The cleanest way to see overlap is the consensus holdings tool across that peer group — the names that appear in 3+ of those books are the AI-cycle consensus trades; the names that appear in only Altimeter's book are the more idiosyncratic conviction calls. NVDA, META, MSFT, AMZN appear in all of them at varying weights. CoreWeave, Snowflake, and Confluent (CFLT at $209.7M / 3.15%) are more concentrated within the focused-tech subset. Coupang and Uber are where Altimeter is doing something more distinctive — both are platform businesses with AI-adjacent operating leverage rather than direct AI exposure. What to watch in 2026Q1 Three concrete things will resolve in the next 90 days: 2026Q1 13F filing (mid-May): Whether Altimeter trims NVDA from 22.68% as the position approaches single-position risk limits typical of hedge fund mandates. A trim to 15–18% would be normal portfolio management; a hold or add would signal continued high conviction. CoreWeave lockup mechanics: The position was likely seeded at IPO with structured exit windows. Any 2026Q1 reduction would clarify whether Altimeter is treating CRWV as a hold-forever name or a position to monetize. New positions in the 19th–25th slots: The 2025Q1 trough at 14 positions established a floor on diversification. Any new names added to the book in 2026Q1 will reveal where Gerstner is allocating marginal capital — the first signal of where the next 12-month thesis is pointing. The broader read across our institutional signals feed is that focused AI-thesis funds entered 2026 with the same handful of names at concentrated weights. Whether that consensus survives a single negative NVDA earnings cycle is the question every retail investor copying these books has to ask. For Altimeter specifically, the answer will arrive in the 2026Q1 13F, due in mid-May. See the full Altimeter 13F history and the explainer library for context on reading focused hedge fund books — and cross-reference the SEC EDGAR primary filings at CIK 0001541617. ## FAQ ### Who is Brad Gerstner of Altimeter Capital Management? Brad Gerstner is the founder and CIO of Altimeter Capital Management, a focused public-equity hedge fund best known for concentrated AI and consumer technology bets. The firm runs an 18-position public equity book at quarter-end 2025Q4 with $6.66B in reported 13F value, alongside private growth-stage venture funds tracked separately. ### What is Altimeter Capital's largest holding in 2025Q4? Altimeter's largest 2025Q4 holding is NVIDIA at $1.51B reported value, representing 22.68% of the fund's $6.66B 13F AUM. Meta Platforms is second at $1.22B (18.28%), followed by Microsoft at 9.27% and Amazon at 7.68%. The top four positions alone account for 57.91% of disclosed assets. ### Why did Altimeter's AUM swing so dramatically in 2025? Altimeter's 13F AUM dropped 42.5% from 2024Q4 to 2025Q1, then rebounded 117.3% in 2025Q2. This is a hedge fund with quarterly redemption windows, so AUM swings reflect a combination of LP redemptions, new commitments, and mark-to-market changes — not pure directional view. The fund rebuilt the rebound capital into a similar 18-position concentrated book rather than diversifying. ### Does Altimeter Capital own CoreWeave stock? Yes, Altimeter Capital reports a $230.1M position in CoreWeave (CRWV) at 3.45% of 2025Q4 AUM. The position was likely seeded at or near CoreWeave's IPO, given Altimeter's history of cross-over private-to-public participation in AI infrastructure names. Lockup mechanics and subsequent 13F filings will reveal whether the position is treated as a hold or a structured exit. --- Source: 13F Insight — https://13finsight.com/research/altimeter-capital-2025q4-nvda-concentration Author: Marcus Chen — https://13finsight.com/authors/marcus-chen Last updated: 2026-05-11T08:42:48.374Z