Altimeter Capital Management, LP 13F: Quarter-over-Quarter Portfolio Changes
Altimeter Capital Management, LP reported a disclosed portfolio value of approximately $5.7 billion in its latest SEC Form 13F-HR filing for Q1 2026, down 14.5% quarter on quarter. Over the quarter, the fund initiated 2 new positions, bought more shares in 6 holdings, trimmed 4 holdings, and exited 7 positions.
Altimeter Capital Management, LP's top buy was a new stake in Arm Holdings PLC (ARM) , equal to 4.6% of the disclosed portfolio. Its top sell was Coupang INC (CPNG) . The fund exited the position completely after it had accounted for 5.6% of the previous portfolio.
New PositionsQ1 2026
Securities disclosed for the first time in Q1 2026 that were not present in the prior 13F-HR filing.
| Company | Ticker | Initial Portfolio Weight | History |
|---|---|---|---|
| ARM HOLDINGS PLC | ARM | 4.6% | History → |
| AXON ENTERPRISE INC | AXON | 1.1% | History → |
Top BuysQ1 2026
The fund's top buys among existing positions in Q1 2026. Ranked by portfolio-weight impact, with the percentage of additional shares shown separately.
| Company | Ticker | Portfolio Weight Change | More Shares | History |
|---|---|---|---|---|
| BROADCOM | AVGO | +0.2% | +108.8% | Holders → |
| UBER TECHNOLOGIES INC | UBER | +3.2% | +42.6% | History → |
| COREWEAVE INC | CRWV | +2.7% | +40.0% | History → |
| NVIDIA CORPORATION COM | NVDA | +5.9% | +15.3% | History → |
| TAIWAN SEMIC-ADR | TSM | +2.5% | +12.0% | History → |
| META PLATFORMS INC | META | +1.3% | +5.9% | History → |
Top SellsQ1 2026
The fund's top sells among positions it retained in Q1 2026. Ranked by portfolio-weight impact. Full exits are listed separately.
| Company | Ticker | Portfolio Weight Change | Shares Sold | History |
|---|---|---|---|---|
| ROBINHOOD MKTS INC | HOOD | -1.1% | 30.4% | Holders → |
| MICROSOFT | MSFT | -1.6% | 7.3% | History → |
| AMAZON.COM | AMZN | -0.0% | 5.7% | History → |
| SNOWFLAKE INC | SNOW | -1.6% | 5.0% | History → |
Full ExitsQ1 2026
Positions present in the prior 13F-HR filing that no longer appear in Q1 2026.
| Company | Ticker | Last-Reported Portfolio Weight |
|---|---|---|
| COUPANG INC | CPNG | 5.6% |
| CONFLUENT INC | 8QR | 3.1% |
| ALPHABET CL A | GOOGL | 2.4% |
| ZILLOW GROUP INC | Z | 2.2% |
| MERCADOLIBRE INC | MELI | 2.1% |
| SHOPIFY INC | SHOP | 1.4% |
| BLOOM ENERGY | BE | 0.3% |
Net Portfolio Value ChangeQ1 2026
- $6.7BPrior quarter
- $5.7BCurrent quarter
- $-1.0BNet delta
- -14.5%% change
Methodology & FAQ
How Altimeter Capital Management, LP Quarterly Changes Are Computed
All deltas are sourced from sequential SEC Form 13F-HR filings for Altimeter Capital Management, LP: each row joins the most recent filing against the immediately preceding quarterly filing for the same fund. Share-count changes reflect reported trading activity, while portfolio weights can also move because of market price changes. Portfolio weights are normalized to exclude listed options for comparability. A complete description — including how confidential treatment filings are handled — is documented in the Methodology.
What stocks did Altimeter Capital Management, LP buy in Q1 2026?
In Q1 2026, Altimeter Capital Management, LP initiated 2 new positions (ARM HOLDINGS PLC (ARM), AXON ENTERPRISE INC (AXON)); bought more shares of BROADCOM (AVGO), UBER TECHNOLOGIES INC (UBER), COREWEAVE INC (CRWV), NVIDIA CORPORATION COM (NVDA), TAIWAN SEMIC-ADR (TSM) — the largest 5 of 6 adds.
What stocks did Altimeter Capital Management, LP sell in Q1 2026?
In Q1 2026, Altimeter Capital Management, LP fully sold 7 positions (COUPANG INC (CPNG), CONFLUENT INC (8QR), ALPHABET CL A (GOOGL), ZILLOW GROUP INC (Z), MERCADOLIBRE INC (MELI), SHOPIFY INC (SHOP), BLOOM ENERGY (BE)); reduced holdings in ROBINHOOD MKTS INC (HOOD), MICROSOFT (MSFT), AMAZON.COM (AMZN), SNOWFLAKE INC (SNOW).
Which positions did Altimeter Capital Management, LP initiate in Q1 2026?
Altimeter Capital Management, LP established 2 new positions in Q1 2026: ARM HOLDINGS PLC (ARM, 4.6%), AXON ENTERPRISE INC (AXON, 1.1%).
Which existing positions saw the largest allocation increases for Altimeter Capital Management, LP in Q1 2026?
Of 6 existing positions with share-count increases in Q1 2026, the largest were: BROADCOM (AVGO, +0.2% weight, +108.8% shares), UBER TECHNOLOGIES INC (UBER, +3.2% weight, +42.6% shares), COREWEAVE INC (CRWV, +2.7% weight, +40.0% shares), NVIDIA CORPORATION COM (NVDA, +5.9% weight, +15.3% shares), TAIWAN SEMIC-ADR (TSM, +2.5% weight, +12.0% shares), META PLATFORMS INC (META, +1.3% weight, +5.9% shares).
Which positions did Altimeter Capital Management, LP fully exit in Q1 2026?
Altimeter Capital Management, LP fully exited 7 positions in Q1 2026: COUPANG INC (CPNG, last-reported weight 5.6%), CONFLUENT INC (8QR, last-reported weight 3.1%), ALPHABET CL A (GOOGL, last-reported weight 2.4%), ZILLOW GROUP INC (Z, last-reported weight 2.2%), MERCADOLIBRE INC (MELI, last-reported weight 2.1%), SHOPIFY INC (SHOP, last-reported weight 1.4%), BLOOM ENERGY (BE, last-reported weight 0.3%).
Which existing positions saw the largest allocation reductions for Altimeter Capital Management, LP in Q1 2026?
Of 4 existing positions with share-count reductions in Q1 2026, the largest were: ROBINHOOD MKTS INC (HOOD, -1.1% weight, -30.4% shares), MICROSOFT (MSFT, -1.6% weight, -7.3% shares), AMAZON.COM (AMZN, -0.0% weight, -5.7% shares), SNOWFLAKE INC (SNOW, -1.6% weight, -5.0% shares).
Do quarter-over-quarter 13F allocation changes constitute explicit trading signals?
No. Quarter-over-quarter changes reflect a combination of active trading and market price movement. A weight increase can result from price appreciation alone, without the manager adding shares. Share-count delta is the cleaner indicator of explicit trading activity. All deltas on this page are sourced from sequential SEC Form 13F-HR filings.