US startup investors — May 2026 · May 1, 2026 – May 31, 2026

Recent funding activity in US startups, organised by investor and their role in each round.

Prime Movers LabLatest May 21

The Path · $14.3M Seed Hark · $700M Series A

2rounds

—led

AI 1Healthtech 1

Seed 1, Series A 1

May 21, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series A 1

The Path $14.3M Seed Hark $700M Series A

Salesforce VenturesLatest May 21

Hark · $700M Series A Optura · $17.5M Series A

2rounds

—led

AI 1Healthtech 1

Series A 2

May 21, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 2

Hark $700M Series A Optura $17.5M Series A

Transpose PlatformLatest May 21

Shatterdome Energy · $3.5M Pre-Seed Greenboard · $20M Undisclosed

2rounds

—led

Climate tech 1Fintech 1

Pre-seed 1, Undisclosed 1

May 21, 2026

Details

New companies 2 · Follow-on 0

Stages: Pre-seed 1, Undisclosed 1

Shatterdome Energy $3.5M Pre-Seed Greenboard $20M Undisclosed

CoatueLatest May 20

Mercury · $200M Series D Kalshi · $1B Series F

2rounds

—led

Fintech 2

Series C+ 2

May 20, 2026

Details

New companies 2 · Follow-on 0

Stages: Series C+ 2

Mercury $200M Series D Kalshi $1B Series F

First Round CapitalLatest May 20

Quartermaster · $43M Series A Eisen · $18.5M Series A

2rounds

—led

Defense tech 1Fintech 1

Series A 2

May 20, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 2

Quartermaster $43M Series A Eisen $18.5M Series A

Accenture VenturesLatest May 19

Aera Technology · Undisclosed Undisclosed XBOW · $35M Series C+

2rounds

—led

AI 1Cybersecurity 1

Series C+ 1, Undisclosed 1

May 19, 2026

Details

New companies 2 · Follow-on 0

Stages: Series C+ 1, Undisclosed 1

Aera Technology Undisclosed Undisclosed XBOW $35M Series C+

Cowboy VenturesLatest May 19

Eisen · $18.5M Series A Basata · $21M Series A

2rounds

—led

Fintech 1Healthtech 1

Series A 2

May 19, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 2

Eisen $18.5M Series A Basata $21M Series A

Define VenturesLatest May 19

Blank Bio · $7.2M Seed 9amHealth · $26M Series B

2rounds

—led

Biotech 1Healthtech 1

Seed 1, Series B 1

May 19, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series B 1

Blank Bio $7.2M Seed 9amHealth $26M Series B

MESHLatest May 19

Checker · $8M Undisclosed ANELLO Photonics · $25M Series B-2

2rounds

1led

Defense tech 1Fintech 1

Series B 1, Undisclosed 1

May 19, 2026

Details

New companies 2 · Follow-on 0

Stages: Series B 1, Undisclosed 1

Checker $8M Undisclosed ANELLO Photonics $25M Series B-2

Shield CapitalLatest May 19

Armada · $230M Series B Star Catcher Industries · $65M Series A

2rounds

—led

AI 1Space tech 1

Series A 1, Series B 1

May 19, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series B 1

Armada $230M Series B Star Catcher Industries $65M Series A

Silent VenturesLatest May 19

Armada · $230M Series B Furientis · $5M Pre-seed

2rounds

1led

AI 1Defense tech 1

Pre-seed 1, Series B 1

May 19, 2026

Details

New companies 2 · Follow-on 0

Stages: Pre-seed 1, Series B 1

Armada $230M Series B Furientis $5M Pre-seed

ClearVision VenturesLatest May 18

Gradiant · Undisclosed Series E GridCARE · $64M Series A

2rounds

—led

Climate tech 2

Series A 1, Series C+ 1

May 18, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series C+ 1

Gradiant Undisclosed Series E GridCARE $64M Series A

Pear VCLatest May 18

Kin Health · $9M Seed Forus · $160M Series A

2rounds

—led

Healthtech 2

Seed 1, Series A 1

May 18, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series A 1

Kin Health $9M Seed Forus $160M Series A

Sutter Hill VenturesLatest May 18

Sigma Computing · $80M Series E GridCARE · $64M Series A

2rounds

—led

AI 1Climate tech 1

Series A 1, Series C+ 1

May 18, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series C+ 1

Sigma Computing $80M Series E GridCARE $64M Series A

Basis Set VenturesLatest May 14

Synthetic · $10M Seed Basata · $21M Series A

2rounds

—led

Fintech 1Healthtech 1

Seed 1, Series A 1

May 14, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series A 1

Synthetic $10M Seed Basata $21M Series A

John DoerrLatest May 14

GridCARE · $64M Series A Panthalassa · $140M Series B

2rounds

—led

Climate tech 2

Series A 1, Series B 1

May 14, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series B 1

GridCARE $64M Series A Panthalassa $140M Series B

Khosla VenturesLatest May 14

Synthetic · $10M Seed Exaforce · $125M Series B

2rounds

—led

Cybersecurity 1Fintech 1

Seed 1, Series B 1

May 14, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series B 1

Synthetic $10M Seed Exaforce $125M Series B

PHX VenturesLatest May 14

equipifi · $34M Series B Basata · $21M Series A

2rounds

—led

Fintech 1Healthtech 1

Series A 1, Series B 1

May 14, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series B 1

equipifi $34M Series B Basata $21M Series A

Pioneer FundLatest May 14

Flick · $6M Seed Fazeshift · $17M Series A

2rounds

—led

AI 1Fintech 1

Seed 1, Series A 1

May 14, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series A 1

Flick $6M Seed Fazeshift $17M Series A

Link VenturesLatest May 13

Anomaly Insights · $17M Series B Blitzy · $200M Growth

2rounds

—led

AI 1Healthtech 1

Growth 1, Series B 1

May 13, 2026

Details

New companies 2 · Follow-on 0

Stages: Growth 1, Series B 1

Anomaly Insights $17M Series B Blitzy $200M Growth

B CapitalLatest May 12

Havoc · $100M Series A Star Catcher Industries · $65M Series A

2rounds

—led

Defense tech 1Space tech 1

Series A 2

May 12, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 2

Havoc $100M Series A Star Catcher Industries $65M Series A

Frist Cressey VenturesLatest May 12

Knit Health · $11.6M Seed Modicus Prime · $4.5M Undisclosed

2rounds

—led

Healthtech 2

Seed 1, Undisclosed 1

May 12, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Undisclosed 1

Knit Health $11.6M Seed Modicus Prime $4.5M Undisclosed

SAICLatest May 12

Havoc · $100M Series A Cowboy Space Corporation · $275M Series B

2rounds

—led

Defense tech 1Space tech 1

Series A 1, Series B 1

May 12, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series B 1

Havoc $100M Series A Cowboy Space Corporation $275M Series B

Wayfinder VenturesLatest May 12

Greenboard · $20M Undisclosed Fazeshift · $17M Series A

2rounds

—led

Fintech 2

Series A 1, Undisclosed 1

May 12, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Undisclosed 1

Greenboard $20M Undisclosed Fazeshift $17M Series A

InterlagosLatest May 11

Heaviside Industries · $28M Series A Cowboy Space Corporation · $275M Series B

2rounds

—led

Defense tech 1Space tech 1

Series A 1, Series B 1

May 11, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series B 1

Heaviside Industries $28M Series A Cowboy Space Corporation $275M Series B

IVPLatest May 11

Cowboy Space Corporation · $275M Series B Kalshi · $1B Series F

2rounds

—led

Fintech 1Space tech 1

Series B 1, Series C+ 1

May 11, 2026

Details

New companies 2 · Follow-on 0

Stages: Series B 1, Series C+ 1

Cowboy Space Corporation $275M Series B Kalshi $1B Series F

20VCLatest May 6

District · $14.7M Seed Moritz · $9M Pre-Seed

2rounds

—led

AI 1Enterprise software 1

Pre-seed 1, Seed 1

May 6, 2026

Details

New companies 2 · Follow-on 0

Stages: Pre-seed 1, Seed 1

District $14.7M Seed Moritz $9M Pre-Seed

Greylock PartnersLatest May 6

District · $14.7M Seed Vori · $22M Series B

2rounds

—led

AI 1Ecommerce 1

Seed 1, Series B 1

May 6, 2026

Details

New companies 2 · Follow-on 0

Stages: Seed 1, Series B 1

District $14.7M Seed Vori $22M Series B

Washington Harbour PartnersLatest May 6

Scout Space · $18M Series A ANELLO Photonics · $25M Series B-2

2rounds

0led

Defense tech 1Space tech 1

Series A 1, Series B 1

May 6, 2026

Details

New companies 2 · Follow-on 0

Stages: Series A 1, Series B 1

Scout Space $18M Series A ANELLO Photonics $25M Series B-2

Atinum InvestmentLatest May 29

XCENA · $135M Series B

1rounds

—led

AI 1

Series B 1

May 29, 2026

Details

New companies 1 · Follow-on 0

Stages: Series B 1

XCENA $135M Series B

“—” in Led means every role for that investor in this period is undisclosed; it does not mean zero leads. New companies counts the first participation in a company in our records; follow-on counts later participation.