Altimeter Capital

Hedge fund
Silicon Valley and Boston, USAFounded 2008$18.8B AUMwww.altimeter.com

Technology-focused venture and growth investment firm supporting entrepreneurs through all stages of company growth and public transition.

Strategy

Stages
Early StageGrowthLate Stage
Sectors
Technology
Geographies
Silicon Valley and Boston, USA

Recent changes

  1. Sep 6, 2026Sectors updated: Technology Wikipedia
  2. Sep 6, 2026Stages updated: Early Stage, Growth, Late Stage Wikipedia
  3. Aug 19, 2026Follow-on: Invested in Castelion (Series C, $1B ($800M equity + $250M revolving credit facility)) Castelion
  4. Aug 4, 2026Invested in Volta Infra (Venture, $300M) The Next Web
  5. Jun 26, 2026Invested in Baseten (Series F, $1.5B) Crunchbase News
Earlier changes (12)
  1. May 28, 2026Follow-on: Invested in Anthropic (Series H, $65B) TechCrunch
  2. Dec 5, 2025Invested in Castelion (Series B, $350M) Castelion
  3. Sep 17, 2025Invested in Groq (Growth, $750M) TechCrunch
  4. Sep 2, 2025Invested in Anthropic (Series F, $13B) TechCrunch
  5. Mar 31, 2025Follow-on: Invested in OpenAI ($40B) TechCrunch
  6. Oct 2, 2024Invested in OpenAI ($6.6B) TechCrunch
  7. 2021New fund: Altimeter Growth Lincoln Fund ($60M) Wikipedia
  8. 2020New fund: Altimeter Growth Cascade Fund ($100M) Wikipedia
  9. 2020New fund: Altimeter Growth Castle Fund ($32M) Wikipedia
  10. 2017New fund: Altimeter Capital Fund III ($200M) Wikipedia
  11. 2015New fund: Altimeter Capital Fund II ($225M) Wikipedia
  12. 2013New fund: Altimeter Capital Fund I ($75M) Wikipedia

Funds

6
FundVintageSizeStrategySource
Altimeter Growth Lincoln Fund2021$60MGrowth
As of 2021Wikipedia
Altimeter Growth Cascade Fund2020$100MGrowth
As of 2020Wikipedia
Altimeter Growth Castle Fund2020$32MGrowth
As of 2020Wikipedia
Altimeter Capital Fund III2017$200MOther
As of 2017Wikipedia
Altimeter Capital Fund II2015$225MOther
As of 2015Wikipedia
Show 1 earlier fund
FundVintageSizeStrategySource
Altimeter Capital Fund I2013$75MOther
As of 2013Wikipedia

Portfolio

8 total
OpenAIAnthropicGroqCastelionVolta InfraK2 SpaceBasetenCerebras

Recent Investment Activity

10
DateCompanyEventAmountValuationInvestorsSource
Aug 19, 2026CastelionSeries C$1B ($800M equity + $250M revolving credit facility)$13B
Andreessen HorowitzCarlyle GroupLightspeed Venture PartnersLavrock VenturesAltimeter CapitalGeneral CatalystInterlagosT. Rowe PriceJPMorgan Chase Strategic Investment Group
outlined = lead
Castelion
Aug 4, 2026Volta InfraVenture$300M$2.4B
Andreessen HorowitzAltimeter CapitalNVenturesMichael Dell
outlined = lead
The Next Web
Jun 26, 2026BasetenSeries F$1.5B$13B
Altimeter CapitalConvictionSpark CapitalSands CapitalWellington Management
outlined = lead
Pulse story
May 28, 2026AnthropicSeries H$65B$965B
Altimeter CapitalDragoneer Investment GroupGreenoaksSequoia CapitalCoatue ManagementD1 Capital PartnersBaillie GiffordBlackstone (Tech Hub)BrookfieldDST GlobalFidelity InvestmentsSamsungSK HynixMicronAmazonCapital GroupD. E. Shaw Ventures
outlined = lead
TechCrunch
May 14, 2026CerebrasIPO$5.55B$56.4B
CitigroupGoldman SachsAlpha Wave GlobalG42Foundation CapitalTiger Global ManagementFidelity InvestmentsBenchmarkAltimeter CapitalAMD VenturesCoatue Management
outlined = lead
CNBC / TechCrunch
Dec 5, 2025CastelionSeries B$350M—
Altimeter CapitalLightspeed Venture PartnersLavrock VenturesAndreessen HorowitzGeneral CatalystFirst InBlueYard CapitalInterlagosSpace VCCantosAvenirChampion Hill
outlined = lead
Castelion
Sep 17, 2025GroqGrowth$750M$6.9B
DisruptiveBlackRockNeuberger BermanSamsungCisco InvestmentsD1 Capital PartnersAltimeter CapitalDeutsche Telekom Capital Partners
outlined = lead
TechCrunch
Sep 2, 2025AnthropicSeries F$13B$183B
Iconiq CapitalFidelity InvestmentsLightspeed Venture PartnersAltimeter CapitalBaillie GiffordBlackRockBlackstone (Tech Hub)Coatue ManagementD1 Capital PartnersInsight PartnersOTPP (Ontario Teachers' Pension Plan)Qatar Investment Authority
outlined = lead
TechCrunch
Mar 31, 2025OpenAIfunding round$40B$300B
SoftBank GroupMicrosoftCoatue ManagementAltimeter CapitalThrive Capital
outlined = lead
TechCrunch
Oct 2, 2024OpenAIfunding round$6.6B$157B
Thrive CapitalMicrosoftNVenturesSoftBank GroupKhosla VenturesAltimeter CapitalFidelity InvestmentsMGX
outlined = lead
TechCrunch

Sector / Stage Activity

By sector (portfolio)
AI infra
4 · 50%
Semiconductors
2 · 25%
Defense
1 · 13%
Space
1 · 13%
By stage (tracked rounds)
Series F
2 · 20%
Series C
1 · 10%
Venture
1 · 10%
Series H
1 · 10%
IPO
1 · 10%
Series B
1 · 10%
Growth
1 · 10%

Co-Investors

12
NVentures · 4 sharedAlpha Wave Global · 3 sharedCoatue Management · 3 sharedFidelity Investments · 3 sharedLightspeed Venture Partners · 3 sharedSV Angel · 3 sharedAndreessen Horowitz · 3 sharedAmazon · 2 sharedBlackRock · 2 sharedCisco Investments · 2 sharedD1 Capital Partners · 2 sharedGeneral Catalyst · 2 shared

Latest Pulse

Pulse coverage →
  1. Thrive Holdings Raises $2B to Buy and Rewire Firms With AIThrive Holdings, the Thrive Capital spinout that acquires services businesses and rebuilds them with AI, raised $2 billion at a $12 billion valuation from SoftBank, D1 Capital and Altimeter, with OpenAI as an equity holder.→
  2. Nvidia, Dell Back AI Cloud Startup Volta at $2.4BVolta Infra raised $300M at a $2.4B valuation from a16z, Altimeter, Nvidia and Michael Dell, plus a $10B, six-year cloud-capacity contract reportedly with Anthropic.→
  3. Baseten Raises $1.5B Series F at a $13B Valuation as AI Inference Demand ExplodesAI inference provider Baseten closed a $1.5 billion Series F at a $13 billion valuation, the largest funding round of the week, led by Altimeter Capital and Conviction Partners with Spark, Sands and Wellington participating. The raise underscores how serving AI models -- not just training them -- has become one of the most valuable and capital-intensive layers of the stack.→
  4. Baseten Reportedly Raising ~$1.5B at a $13B Valuation as AI Inference Becomes the Hot TradeAI inference platform Baseten is reportedly raising roughly $1.5 billion at a valuation of up to $13 billion -- tripling its mark in about five months -- co-led by Spark Capital, Sands Capital, Altimeter and Wellington. The round captures investors racing into the layer that actually serves AI models in production, where Baseten's ARR has reportedly jumped from $200M to $600M.→
Sources & methodologyshow
Where these figures come from

Figures are labelled Reported (a source states it), Estimated, Derived (computed from other facts) or Rumored (in talks / unconfirmed). Rumors never replace a confirmed figure. Each figure keeps its own as-of date; history is preserved rather than overwritten.

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