Altimeter Capital 13F tracker

Altimeter Capital 13F holdings and Brad Gerstner portfolio

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.

Form 13F reports holdings as of 2026-06-30 and was filed on 2026-08-14. It is delayed, can omit confidential positions, and is not the manager's current portfolio or fund NAV. Options show reported underlying value—not premium, net exposure, or investment intent.

Disclosed long book

$9.83 billion

Long positions

20

Calls / puts

0 / 0

Top 5 concentration

56.3%

Longs with AI data

16 / 20

Average AI 1Y

+18.7%

Official SEC filing ↗Exact filing eventPermanent quarter pageJSONDownload CSV

Monitored between quarterly reports

Beneficial-ownership disclosures

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 2026-06-30 Form 13F portfolio.

Cerebras Systems Inc.

SCHEDULE 13GSeparate ownership event

The filing reports Altimeter Capital Management, LP's beneficial ownership as of June 30, 2026: 7,160,181 shares or share-equivalents representing 6.2% of the reported class. It was filed on August 14, 2026.

Note for Rows 6 and 8: Comprised of 2,516,377 outstanding shares of Class A common stock, $0.00001 par value per share ("Class A Shares") of Cerebras Systems Inc. (the "Issuer") and 4,643,804 Class A Shares issuable upon conversion of 4,643,804 shares of Class B common stock, $0.00001 par value per share ("Class B Shares") of the Issuer beneficially owned by the Reporting Person as of August 14, 2026. Class B Shares are convertible to Class A Shares at any time. Note for Row 11: Based upon (i) 112,247,109 Class A Shares outstanding as of August 5, 2026, as reported by the Issuer in its Quarte

Official SEC disclosure ↗

Confluent, Inc.

SCHEDULE 13G/ASeparate ownership event

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

Quarter-over-quarter changes

2026-03-31 to 2026-06-30

Newly reported

10

No longer reported

3

Increased

5

Reduced

3

Newly reported this quarter

Present now and absent from the immediately preceding comparable filing.

PositionKindSharesValue

CEREBRAS SYSTEMS INC

CEREBRAS SYSTEMS INC

LONG7,225,037$1.60 billion

QCOM

QUALCOMM INC

LONG1,882,490$347.9 million

SPACE EXPLORATION TECHN CORP

SPACE EXPLORATION TECHN CORP

LONG1,776,485$303.5 million

MU

MICRON TECHNOLOGY INC

LONG209,520$241.8 million

AMAT

APPLIED MATLS INC

LONG261,950$189.4 million

KLA CORP

KLA CORP

LONG578,230$174.5 million

LRCX

LAM RESEARCH CORP

LONG394,080$170.8 million

GOOGL

ALPHABET INC

LONG175,180$62.6 million

SNPS

SYNOPSYS INC

LONG140,343$62.6 million

GRAB HOLDINGS LIMITED

GRAB HOLDINGS LIMITED

LONG3,502,000$150,586

No longer reported this quarter

Present in the prior comparable filing and absent from this one.

PositionKindPrior sharesPrior value

AVGO

BROADCOM INC · COM

LONG67,094$20.8 million

AXON

AXON ENTERPRISE INC · COM

LONG148,986$63.3 million

GRAB HOLDINGS LIMITED

GRAB HOLDINGS LIMITED · W EXP 12/1/202

LONG3,502,000$262,650

“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.

PositionKindSharesValueLong weightQuarter changeAI at filing · 1YAI now

NVDA

NVIDIA Corporation

LONG9,413,589$1.88 billion19.2%INCREASED34.1%

1Y +21.8%

5Y +133.8% · 8 models

CEREBRAS SYSTEMS INC

CEREBRAS SYSTEMS INC · COM CL A · 15675D103

LONG7,225,037$1.60 billion16.2%NEWLY REPORTED—

1Y —

5Y —

META

Meta Platforms Inc.

LONG1,354,990$763.3 million7.8%REDUCED22.1%

1Y +18.1%

5Y +104.6% · 8 models

TSM

Taiwan Semiconductor Manufacturing Co.

LONG1,429,355$682.6 million6.9%INCREASED24.3%

1Y +23.9%

5Y +141.4% · 7 models

CRWV

CoreWeave Inc

LONG6,073,695$604.6 million6.2%INCREASED44.1%

1Y +4.0%

5Y +109.0% · 5 models

ARM

Arm Holdings plc

LONG1,641,972$582.2 million5.9%REDUCED26.0%

1Y +17.5%

5Y +112.5% · 6 models

AMZN

Amazon.com Inc.

LONG2,425,351$578.1 million5.9%INCREASED22.4%

1Y +19.4%

5Y +96.9% · 8 models

UBER

UBER TECHNOLOGIES INC · COM · 90353T100

LONG7,372,440$532.0 million5.4%REDUCED—

1Y +21.4%

5Y +129.0% · 5 models

SNOW

Snowflake Inc.

LONG1,926,250$490.2 million5.0%UNCHANGED20.6%

1Y +17.2%

5Y +102.0% · 5 models

MSFT

Microsoft Corporation

LONG1,268,082$473.0 million4.8%INCREASED16.6%

1Y +14.2%

5Y +78.3% · 6 models

QCOM

Qualcomm Inc.

LONG1,882,490$347.9 million3.5%NEWLY REPORTED20.3%

1Y +15.6%

5Y +79.0% · 5 models

SPACE EXPLORATION TECHN CORP

SPACE EXPLORATION TECHN CORP · CLASS A COM STK · 84615Q103

LONG1,776,485$303.5 million3.1%NEWLY REPORTED—

1Y —

5Y —

MU

Micron Technology Inc.

LONG209,520$241.8 million2.5%NEWLY REPORTED31.9%

1Y +31.2%

5Y +147.0% · 5 models

AMAT

APPLIED MATLS INC · COM · 038222105

LONG261,950$189.4 million1.9%NEWLY REPORTED—

1Y +19.4%

5Y +95.8% · 6 models

KLA CORP

KLA CORP · COM NEW · 482480100

LONG578,230$174.5 million1.8%NEWLY REPORTED—

1Y —

5Y —

LRCX

LAM RESEARCH CORP · COM NEW · 512807306

LONG394,080$170.8 million1.7%NEWLY REPORTED—

1Y +18.6%

5Y +107.0% · 5 models

HOOD

ROBINHOOD MKTS INC · COM CL A · 770700102

LONG899,691$90.2 million0.9%UNCHANGED—

1Y +25.5%

5Y +113.3% · 6 models

GOOGL

Alphabet Inc.

LONG175,180$62.6 million0.6%NEWLY REPORTED18.9%

1Y +16.4%

5Y +90.8% · 6 models

SNPS

SYNOPSYS INC · COM · 871607107

LONG140,343$62.6 million0.6%NEWLY REPORTED—

1Y +15.2%

5Y +96.0% · 5 models

GRAB HOLDINGS LIMITED

GRAB HOLDINGS LIMITED · W EXP 12/1/202 · G4124C117

LONG3,502,000$150,586—NEWLY REPORTED—

1Y —

5Y —

AI outlook values are averages across the latest successful run per covered model at the labeled cutoff. “No longer reported” does not necessarily mean sold; thresholds, confidential treatment, corporate actions, or instrument changes may explain an omission. Reviewed API mapping covers 68.3%of disclosed long-book value; exact editorial CUSIP mappings may add current-only AI coverage on this public page. Research use only. No warranty and not investment advice.

Filing history

Get filing alerts →

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.

Holdings dateFiledFormProcessingAccession
2026-06-302026-08-1413F-HRVALIDATED0001541617-26-000008
2026-03-312026-05-1513F-HRVALIDATED0001541617-26-000006
2025-12-312026-02-1713F-HRVALIDATED0001541617-26-000002
2025-09-302025-11-1413F-HRVALIDATED0001541617-25-000013
2025-06-302025-08-1413F-HRVALIDATED0001541617-25-000009
2025-03-312025-05-1513F-HRVALIDATED0001541617-25-000005
2024-12-312025-02-1413F-HRVALIDATED0001541617-25-000002
2024-09-302024-11-1413F-HRVALIDATED0001541617-24-000009
2024-06-302024-08-1413F-HRVALIDATED0001541617-24-000007
2024-03-312024-05-1513F-HRVALIDATED0001541617-24-000006
2023-12-312024-02-1413F-HRVALIDATED0001541617-24-000004
2023-09-302023-11-1413F-HRVALIDATED0001541617-23-000010
2023-06-302023-08-1413F-HRVALIDATED0001541617-23-000009
2023-03-312023-05-1613F-HRVALIDATED0001541617-23-000007
2022-12-312023-02-1413F-HRVALIDATED0001541617-23-000003
2022-09-302022-11-1413F-HRVALIDATED0001541617-22-000020
2022-06-302022-08-1513F-HRVALIDATED0001541617-22-000019
2022-03-312022-05-1713F-HR/AQUARANTINED0001541617-22-000015
2022-03-312022-05-1713F-HRQUARANTINED0001541617-22-000014
2021-12-312022-02-1413F-HRQUARANTINED0001541617-22-000002
2021-09-302021-11-1513F-HRQUARANTINED0001541617-21-000009
2021-06-302021-10-0713F-HR/A · restatementVALIDATED0001541617-21-000008
2021-06-302021-08-1613F-HRQUARANTINED0001541617-21-000007
2021-03-312021-05-1713F-HRVALIDATED0001541617-21-000003
2020-12-312021-02-1613F-HRVALIDATED0001104659-21-024216
2020-09-302020-11-1613F-HRVALIDATED0001104659-20-125814
2020-06-302020-08-1413F-HRVALIDATED0001104659-20-095505
2020-03-312020-05-1513F-HRVALIDATED0001104659-20-062573
2019-12-312020-02-1413F-HRVALIDATED0001104659-20-021715
2019-09-302019-11-1413F-HRVALIDATED0001104659-19-064188
2019-06-302019-08-1413F-HRVALIDATED0001144204-19-040061
2019-03-312019-05-1513F-HRVALIDATED0001144204-19-026553
2018-12-312019-02-1513F-HR/A · restatementVALIDATED0001144204-19-008619
2018-12-312019-02-1413F-HRVALIDATED0001144204-19-008240
2018-09-302018-11-1413F-HRVALIDATED0001144204-18-059922
2018-06-302018-08-1413F-HRVALIDATED0001144204-18-044634
2018-03-312018-05-1513F-HRVALIDATED0001144204-18-028848
2017-12-312018-02-1413F-HRVALIDATED0001144204-18-008859
2017-09-302017-11-1413F-HRVALIDATED0001144204-17-059036
2017-06-302017-08-1413F-HRVALIDATED0001144204-17-043160
2017-03-312017-05-1513F-HRVALIDATED0001144204-17-027368
2016-12-312017-02-1413F-HRVALIDATED0001144204-17-008913
2016-09-302016-11-1413F-HRVALIDATED0001546927-16-000539
2016-06-302016-08-1513F-HRVALIDATED0001546927-16-000516
2016-03-312016-05-1613F-HRVALIDATED0001546927-16-000491
2015-12-312016-02-1213F-HRVALIDATED0001546927-16-000374
2015-09-302015-11-1313F-HRVALIDATED0001546927-15-000276
2015-06-302015-08-1413F-HRVALIDATED0001546927-15-000227
2015-03-312015-05-1513F-HRVALIDATED0001546927-15-000151
2014-12-312015-02-1313F-HRVALIDATED0001546927-15-000068
2014-09-302014-11-1413F-HRVALIDATED0001546927-14-000194
2014-06-302014-08-1413F-HRVALIDATED0001546927-14-000155
2014-03-312014-05-1513F-HRVALIDATED0001546927-14-000110
2013-12-312014-02-1413F-HRQUARANTINED0001546927-14-000066
2013-09-302013-11-1413F-HRQUARANTINED0001546927-13-000209
2013-06-302013-08-1413F-HRVALIDATED0001546927-13-000155
2013-03-312013-05-1513F-HRVALIDATED0001546927-13-000089
2012-12-312013-02-1413F-HRVALIDATED0001546927-13-000037
2012-09-302012-11-1413F-HRVALIDATED0001546927-12-000072
2012-06-302012-08-1413F-HRVALIDATED0001546927-12-000051
2012-03-312012-05-1513F-HRVALIDATED0001546927-12-000024
2011-12-312012-02-1413F-HRVALIDATED0001193125-12-058135
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How to use this portfolio tracker

About Brad Gerstner and Altimeter Capital

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.

A public-market view of a crossover investor

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.

Portfolio composition first

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.

AI as a comparison layer

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.

Frequently asked questions

Who is Brad Gerstner?

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.

What stocks are in Brad Gerstner's Altimeter Capital portfolio?

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.

What does the Altimeter portfolio page include?

It includes validated 13F positions, disclosed values and weights, quarter-over-quarter status, filing history, source links, and AI aggregates where identity coverage exists.

Does the 13F include Altimeter’s private investments?

No. Form 13F covers specified reportable public securities and is not a complete view of a firm’s public and private assets.

What does a Form 13F show?

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.