Altimeter Capital 13F tracker
This Altimeter Capital 13F tracker follows the public portfolio of the technology-focused investment firm founded and led by Brad Gerstner. It shows the latest validated holdings, position weights, quarterly changes, and Hallucination Yield model forecasts for covered securities, with the exact SEC filing beneath every snapshot.
Disclosed long book
$5.70 billion
Long positions
13
Calls / puts
0 / 0
Top 5 concentration
74.0%
Longs with AI data
11 / 13
Average AI 1Y
+20.0%
Monitored between quarterly reports
Schedules 13D and 13G can reveal a significant ownership event after a quarter closes. They are shown as a separate event timeline and never folded back into the 2026-03-31 Form 13F portfolio.
The filing reports Altimeter Capital Management, LP's beneficial ownership as of June 30, 2025: 13,122,150 shares or share-equivalents representing 4.5% of the reported class. It was filed on August 14, 2025.
Official SEC disclosure ↗13F filing comparison
2025-12-31 to 2026-03-31
Newly reported
2
No longer reported
7
Increased
6
Reduced
4
Present now and absent from the immediately preceding comparable filing.
| Position | Kind | Shares | Value |
|---|---|---|---|
ARM ARM HOLDINGS PLC | LONG | 1,715,440 | $259.5 million |
AXON AXON ENTERPRISE INC | LONG | 148,986 | $63.3 million |
Present in the prior comparable filing and absent from this one.
| Position | Kind | Prior shares | Prior value |
|---|---|---|---|
BE BLOOM ENERGY CORP · COM CL A | LONG | 260,730 | $22.7 million |
CONFLUENT INC CONFLUENT INC · CLASS A COM | LONG | 6,933,250 | $209.7 million |
COUPANG INC COUPANG INC · CL A | LONG | 15,676,794 | $369.8 million |
GOOGL ALPHABET INC · CAP STK CL A | LONG | 519,290 | $162.5 million |
MERCADOLIBRE INC MERCADOLIBRE INC · COM | LONG | 68,480 | $137.9 million |
SHOPIFY INC SHOPIFY INC · CL A SUB VTG | LONG | 570,210 | $91.8 million |
Z ZILLOW GROUP INC · CL C CAP STK | LONG | 2,187,421 | $149.2 million |
“No longer reported” means the position is absent from this comparable 13F filing. It does not prove the manager sold it: reporting thresholds, confidential treatment, corporate actions, or instrument changes can also explain the omission.
| Position | Kind | Shares | Value | Long weight | Quarter change | AI at filing · 1Y | AI now |
|---|---|---|---|---|---|---|---|
NVDA NVIDIA Corporation | LONG | 9,336,039 | $1.63 billion | 28.6% | INCREASED | 36.7% | 1Y +22.3% 5Y +139.3% · 7 models |
META Meta Platforms Inc. | LONG | 1,953,373 | $1.12 billion | 19.6% | INCREASED | 23.7% | 1Y +18.0% 5Y +92.0% · 5 models |
UBER UBER TECHNOLOGIES INC · COM · 90353T100 | LONG | 7,971,772 | $573.4 million | 10.1% | INCREASED | — | 1Y +20.5% 5Y +111.3% · 4 models |
TSM Taiwan Semiconductor Manufacturing Co. | LONG | 1,365,675 | $461.5 million | 8.1% | INCREASED | 24.7% | 1Y +20.8% 5Y +116.3% · 4 models |
MSFT Microsoft Corporation | LONG | 1,183,632 | $438.1 million | 7.7% | REDUCED | 17.4% | 1Y +14.8% 5Y +76.7% · 6 models |
AMZN AMAZON COM INC · COM · 023135106 | LONG | 2,089,558 | $435.2 million | 7.6% | REDUCED | — | 1Y +18.5% 5Y +98.3% · 6 models |
CRWV CoreWeave Inc | LONG | 4,499,075 | $348.5 million | 6.1% | INCREASED | 50.6% | 1Y +22.0% 5Y +131.3% · 4 models |
SNOW SNOWFLAKE INC · COM SHS · 833445109 | LONG | 1,926,250 | $290.5 million | 5.1% | REDUCED | — | 1Y +19.3% 5Y +111.3% · 4 models |
ARM Arm Holdings plc | LONG | 1,715,440 | $259.5 million | 4.6% | NEWLY REPORTED | 28.0% | 1Y +18.7% 5Y +119.2% · 6 models |
AXON AXON ENTERPRISE INC · COM · 05464C101 | LONG | 148,986 | $63.3 million | 1.1% | NEWLY REPORTED | — | 1Y — 5Y — |
HOOD ROBINHOOD MKTS INC · COM CL A · 770700102 | LONG | 899,691 | $62.3 million | 1.1% | REDUCED | — | 1Y +22.0% 5Y +107.0% · 5 models |
AVGO BROADCOM INC · COM · 11135F101 | LONG | 67,094 | $20.8 million | 0.4% | INCREASED | — | 1Y +23.3% 5Y +137.5% · 6 models |
GRAB HOLDINGS LIMITED GRAB HOLDINGS LIMITED · W EXP 12/1/202 · G0370L116 | LONG | 3,502,000 | $262,650 | — | UNCHANGED | — | 1Y — 5Y — |
Every filing event remains separate, including notices and amendments. Open a holdings date for the canonical portfolio through its latest filing, or an accession for the exact source event.
Brad Gerstner is the founder and CEO of Altimeter Capital. The firm describes itself as a technology-focused investor that manages funds across public and private markets, so this 13F tracker is the disclosed public-securities slice—not a complete account of every Altimeter investment.
Altimeter invests through multiple stages of company growth. The live table keeps the latest reportable public holdings separate from private investments and uses filing dates, quarter-end dates, and original SEC documents to make that boundary explicit.
The table preserves the full validated filing composition and defaults to the latest quarter. Weights describe the disclosed long stock and ETF book, not the firm’s total assets across public and private investments.
Current and filing-time AI aggregates appear only when the disclosed security has a reviewed Hallucination Yield entity mapping. That makes disagreements inspectable without using fuzzy issuer-name matches.
Brad Gerstner is the founder and CEO of Altimeter Capital, a technology-focused investment firm that invests across public and private markets. This page tracks the reportable public securities disclosed by Altimeter—not Gerstner’s personal holdings.
The latest validated Altimeter Capital 13F holdings appear in the table above with disclosed values, long-book weights, quarterly change labels, options separated by instrument, and links to the original SEC filing.
It includes validated 13F positions, disclosed values and weights, quarter-over-quarter status, filing history, source links, and AI aggregates where identity coverage exists.
No. Form 13F covers specified reportable public securities and is not a complete view of a firm’s public and private assets.
Form 13F is a delayed quarterly disclosure of specified reportable U.S. securities held by qualifying institutional investment managers. It does not show a live portfolio, short positions, every derivative, fund NAV, or every public and private investment.