Portefeuilles
Positions 13F divulguées par les principaux gestionnaires institutionnels, curatées à la main et croisées avec la taxonomie de bulles QuantAbundancia. Mis à jour à chaque nouveau dépôt.
Berkshire Hathaway
Warren Buffett
Buffett & Munger's holding company. The most-watched 13F on Wall Street - concentrated, slow-rotating, with cash reserves above $300B as of 2025. Equity book is dominated by AAPL, BAC, AXP, KO, and a long energy leg (CVX + OXY).
Pershing Square Capital
Bill Ackman
Concentrated activist book - typically 8-12 positions, long-biased, run with a hedged-call options overlay. Portfolio is famously disclosed in real time on Twitter.
Scion Asset Management
Michael Burry
"The Big Short" Burry's personal book. Q3 2025 13F-HR (filed 2025-11-03) shows a sharp anti-AI macro bet: long PUTS on PLTR ($912M notional, 5M contracts) and NVDA ($187M, 1M contracts) make up 80% of the $1.38B disclosed. Long calls on PFE ($153M) + HAL ($62M) round out the bullish leg. The long-share sleeve is small ($68M total): MOH, LULU, SLM, and a Bruker 6.375% preferred - Burry rotates aggressively quarter to quarter.
ARK Investment Management
Cathie Wood
High-conviction disruptive-innovation manager. Consolidated 13F across the ARKK family - concentrated in TSLA, COIN, ROKU, RBLX, HOOD, PLTR. Daily-disclosed at the ETF level; the 13F here is the rolled-up institutional view.
Tiger Global Management
Chase Coleman
Tiger-cub style growth-tech long book. Public-equity portion of a much larger private/public hybrid platform. Concentrated in mega-cap tech (META, MSFT, GOOGL) plus a global growth tail (SE, SPOT).
Greenlight Capital
David Einhorn
Long/short value manager. Best known for big short calls (Lehman 2008, GMO 2015) but the long book is a concentrated value portfolio - GRBK has been the largest position for years; recent quarters added BRKB and select healthcare/casino names.
Citadel Advisors
Ken Griffin
Ken Griffin's multi-strategy hedge fund (founded 1990, HQ Miami). One of the largest and most successful hedge funds in history - multi-strategy book spanning equities, fixed income, commodities, credit, and quantitative trading. The 13F-HR equity portion alone routinely exceeds $500B notional across thousands of long lines; the headline names cluster around mega-cap tech (NVDA, AMZN, MSFT, AAPL, META, GOOGL, TSLA), broad-market ETFs (IVV, DIA) used as market-neutral ballast, the AI-chip stack (AVGO, TSM, MU), and tactical industrials (NSC, ASHTY). Citadel is also the largest single market maker in US equities via Citadel Securities (a separate broker-dealer arm).
NVIDIA Corporation
Jensen Huang
NVIDIA's corporate strategic-investment book - every position ties to its AI-compute supply chain or downstream demand. Concentrated (5 holdings, $13.1B disclosed) with each name underlying a publicly-announced partnership: Intel (custom x86 CPUs via NVLink, Sept 2025 deal), CoreWeave (GPU cloud renter, pre-IPO stake), Synopsys (EDA tool partnership), Nokia (Q4 2025 5G/AI JV), Nebius (European compute capacity).
Nancy Pelosi
Nancy Pelosi (US House)
Aggregated equity exposure of US Representative Nancy Pelosi (D-CA), inferred from her continuous STOCK Act Periodic Transaction Reports (PTRs) and consolidated by Autopilot + Quiver Quantitative. Famously concentrated in tech mega-caps via long-dated call options (NVDA / AVGO / GOOGL LEAPs); aggregators count call options as their underlying shares so the weights here include both direct holdings and option-equivalent exposure. Snapshot dated 2026-05-02 - Pelosi trades frequently, so this goes stale fast.
BlackRock, Inc.
Larry Fink
World's largest asset manager. Q4 2025 13F-HR discloses $5.92T across 4,513 unique issuers - every BLK-managed product with US-equity discretion (iShares ETFs, index mutual funds, active funds, SMAs). Top holdings closely mirror S&P 500 weights because passive index AUM dominates the book; this is not a stock-pick portfolio. Top 12 named single tickers sum to 33.5%; iShares Trust cross-holdings add another 2.6% ($156B across many self-held ETF classes); the remaining ~63.9% is the long tail of 4,500+ issuers.
Aquamarine Fund
Guy Spier
Guy Spier's Buffett-style value-investing partnership, run from Zurich since 1997. Author of "The Education of a Value Investor"; famous for the $650K charity lunch with Buffett (alongside Mohnish Pabrai, 2008). Textbook concentrated value book - 7 positions in Q4 2025, anchored by both Berkshire classes (~48.6% combined) and a tight basket of capital-light compounders (Mastercard, AmEx, Moody's, Ferrari, Daily Journal).
Situational Awareness LP
Leopold Aschenbrenner
Leopold Aschenbrenner's AI-supercycle hedge fund (Situational Awareness LP, San Francisco), launched late 2024 after the founder left OpenAI's Superalignment team. Aschenbrenner (25) wrote the canonical AGI-imminence essay "Situational Awareness: The Decade Ahead"; the book is the financial expression of that thesis. **2026-05-27 SC 13G DISCLOSURE - $NBIS at 5.6%.** Filed a 12,410,060 Class A share stake in Nebius Group, ~$2.59B at filing-date close ($208.37). This is the SINGLE LARGEST position ever disclosed by the fund - bigger than the $2.04B SMH put or the $1.57B NVDA put from the Q1 2026 13F-HR. NBIS is the ex-Yandex N.V. AI-compute infrastructure spinoff, US-listed on NASDAQ since late 2024, operating NVIDIA H100/H200 GPU clusters in Finland and serving AI labs + enterprises via Nebius AI Cloud. Acquired between 2026-03-31 (Q1 13F cutoff) and the 2026-05-27 disclosure. The 13G adds a NEW thematic leg on top of the Q1 book: a direct operational-AI-compute long - owning the running cluster business itself, not just the supply chain feeding it. Q1 2026 13F-HR (period 2026-03-31, filed 2026-05-18) documents the tactical pivot quarter: 42 positions, $13.68B total notional - 2.5× the Q4 2025 book. The portfolio is 62% SHORT via $8.46B in puts hitting the entire chip stack - SMH ($2.04B), NVDA ($1.57B), AMD ($969M), AVGO ($1.01B), ORCL ($1.07B), ASML ($494M), plus straddles on MU and TSM. The long side held the AI-infrastructure-bottleneck thesis: Bloom Energy ($879M anchor + $55M calls), SanDisk tripled to $1.11B aggregate (long+calls), CoreWeave ~$700M, all nine BTC-miners-to-HPC names retained (CORZ $389M, IREN $401M, APLD $320M, RIOT $142M, CLSK $104M, BITF, BTDR, HIVE, CIFR-out). Three new names this quarter: SHAZ, TE, HIVE. Activist tier: CORZ 13D at 9.4%, position held through Q1. Pattern reads as: short the picks-and-shovels priced for AGI buildout, long the infrastructure (power generation, datacenter colo housed in ex-miner shells, NAND/HBM) - and now ALSO long the operational AI compute layer via NBIS - that the market hasn't fully priced.
Donald J. Trump
Donald J. Trump (US President, 47th)
Disclosed trading account of US President Donald J. Trump (47th). Surfaces the holdings reconstruction implied by two OGE Form 278-T Periodic Transaction Reports filed 2026-05-14 → 2026-05-15, covering 3,711 securities transactions executed January 6 → March 30, 2026 with a cumulative reported transaction value of $220M-$750M (OGE discloses bands, not exact dollar amounts). The Q1 buy concentration is overwhelmingly AI-supercycle: semiconductors (NVDA, AVGO, TXN, KLAC, CDNS, SNPS, AMD, MU, AMKR, INTC), data center hardware (DELL, JBL, ORCL), enterprise SaaS down 30-45% YTD as buy-the-dip (ADBE, NOW, WDAY, CRM, FIS), and crypto-linked equities (COIN with 9 buys, MARA, MSTR/Strategy). Three Mag-7 names sold in size on Feb 10 in the $5M-$25M band (MSFT, AMZN, META) while AAPL was net-bought (8 buys vs 1 sell). The account also liquidated $15M of VIG and material slugs of SPY/VOO/IVV in January, indicating a rotation out of broad-market ETF beta into single-name tech. This is the disclosed trading account only - it excludes real estate, the TMTG/DJT stake, branded businesses, and other reportable assets carried on the annual Form 278. Multiple outlets (NBC, CNBC, Euronews) have noted the 3,711-transactions-in-11-weeks cadence does not match the President's historical behavior; the account is widely understood to be discretionary-managed by an outside advisor. The holdings list is sorted here by YTD performance (descending) to mirror the @Speculator_io reconstruction image; OGE 278-T does not publish point-in-time weights so weight_pct is left NULL.
Real EDGAR-sourced filings refresh weekly via collectors/sec_13f.py (Sundays 05:13 UTC). Funds tagged editorial are bootstrap approximations from press coverage and get superseded by precise EDGAR data on the next collector run.
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