Q1 2026 13F signal summary — Ackman opens MSFT 15.3%, Berkshire re-enters Delta Air Lines + lifts GOOGL, AMZN consensus continues

The Q1 2026 13F filing window closed 2026-05-15. Of the 30 superinvestors HoldLens tracks, 27 had filed by deadline (the 3 stragglers are smaller registrants whose adviser status sometimes shifts late; their Q1 disclosures typically land within 7-14 days after the deadline as amended filings). Across the filed cohort, HoldLens normalized approximately 4,023 position changes: 2,027 adds, 1,099 trims, 481 first-time positions, 416 full exits.

This is the live snapshot as of the close of the filing window. ConvictionScore v5 computations have been refreshed; all live signal pages (/buys, /best-now, /biggest-buys, per-investor dossiers) reflect Q1 2026 holdings as of EDGAR ingest 2026-05-16.

The headline move — Ackman opens MSFT 15.3%

Bill Ackman's Pershing Square Capital Management disclosed a brand-new position in Microsoft (MSFT) at approximately 5.65 million shares, representing 15.3% of Pershing's reportable portfolio. This is the largest single new-position percentage of Q1 2026 across any tracked superinvestor. It is also the first Microsoft position in Pershing Square's 13F history. Pershing has historically been concentrated in transportation, restaurants, and select hotel-real-estate names; an opening 15.3% software-mega-cap allocation is a material thesis shift.

Berkshire — Delta Air Lines re-entry, Alphabet lifted, Chevron trimmed further

Berkshire Hathaway's Q1 2026 13F disclosed three notable moves:

• Delta Air Lines (DAL) — new position: ~39.8 million shares (about 1% of Berkshire's disclosed equity portfolio). Note: Berkshire previously held a Delta Airlines position 2016-2020 that was sold in the 2020 COVID-disposal of all four major US airlines. The Q1 2026 disclosure indicates a re-entry. (Verify name-vs-ticker mapping via Berkshire's primary 13F-HR filing on EDGAR if the published ticker label appears anomalous.)
• Alphabet (GOOGL) — add: ~36.4 million shares added, lifting Alphabet to 5.9% of the portfolio. Berkshire's Alphabet position was first disclosed Q1 2025; this is the second materially-sized add.
• Chevron (CVX) — trim: ~45.8 million shares sold. Chevron remains at 6.6% of the portfolio post-trim, but the trim continues a 2-year-long gradual reduction.

Klarman (Baupost) — three new financial-services + healthcare positions

Seth Klarman's Baupost opened three sizeable new positions in Q1 2026 that collectively account for roughly 13% of the disclosed portfolio:

• AON — 4.9% (insurance brokerage)
• Visa (V) — 4.1% (payment networks)
• Teleflex (TFX) — 3.7% (medical devices)

Largest single-quarter exit — Coleman closes Grab

Chase Coleman's Tiger Global fully exited Grab Holdings (GRAB) in Q1 2026 — approximately 92.9 million shares closed out. Grab had been a notable Tiger position through 2025; the complete exit (zero shares post-quarter) is one of the cleanest exits of the cycle.

Consensus buys — AMZN holds the #1 slot for a third quarter

Across all tracked superinvestors, the tickers with the most managers adding in Q1 2026:

• AMZN — 6 managers bought (3rd consecutive quarter as #1 consensus)
• V · META · SEA · SPOT · GOOGL · ASML — 5 managers each
• MSFT · BN (Brookfield) · MCO (Moody's) — 4 managers each

The tech-mega-cap concentration thesis remains intact: 7 of the top-10 consensus tickers are mega-cap technology + payments. ASML appearing at 5 buyers is a notable data point for semiconductor-equipment positioning.

Raw-share-count adds — Howard Marks (Oaktree) dominates the list

Howard Marks' Oaktree Capital Management dominated the Q1 2026 raw-share-count adds. Notable line items include a 205+ million-share add to Indivior PLC (a single distressed-name position characteristic of Oaktree's deep-value mandate), 50+ million-share adds to American Water + Coinbase + Bentley Systems, plus new positions in Q2 Holdings, Progress Software, Shift4, and Unity Software. One of Marks' largest Q1 2026 holdings by share count is also an Invesco QQQ Trust position — index-ETF exposure on top of the individual equity book.

These positions reflect Oaktree's combined credit + equity + ETF-overlay strategy rather than concentrated thesis bets: most individual positions are sub-1% of total portfolio. For tracked-superinvestor signal purposes, Oaktree's adds carry less ConvictionScore weight than Pershing's Microsoft because of the diversification.

What the data does NOT show

Standard 13F caveats apply, and they matter especially this quarter:

• No short positions, no derivatives. Form 13F covers long equity in 13(f)-listed securities only. Any manager running pair trades or options overlays — particularly Druckenmiller, Burry, Soros-style macro — has positions that are invisible to this dataset. See our 13(f) securities list explainer.
• 45-day lag. Q1 2026 positions are quarter-end (March 31, 2026) snapshots disclosed up to 45 days later. Managers may have bought or sold between March 31 and the May 15 deadline; those moves show up in Q2 2026. See the 45-day lag explainer.
• Foreign holdings excluded. Non-US securities (most European, Asian listings) are not 13F-reportable. A manager's 13F portfolio is their US-listed-equity book only.

How to read this with HoldLens tools

Three live surfaces on HoldLens reflect Q1 2026 data:

• /buys — top BUY signals by ConvictionScore (latest quarter only)
• /best-now — weighted across the 9-quarter window
• /investor/[slug] — per-manager dossier with Q1 2026 holdings vs Q4 2025 delta

Machine-readable equivalents at /api/v1/ — see /api/v1/best-now.json, /api/v1/consensus.json, and per-manager files under /api/v1/managers/.

Not investment advice. Sourced from public SEC EDGAR Form 13F-HR filings (Berkshire CIK 0001067983 + 26 additional tracked CIKs). Fully reproducible from EDGAR alone. See methodology.