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645 Ventures Management, LLC

SEC exempt reporting adviser (venture capital exemption).

HQ
NY

645 Ventures Management is a New York and San Francisco based early-stage venture firm. It invests in exceptional founders with purity of motivation, earned secrets, and non-consensus thinking. Its portfolio includes FiscalNote, which uses AI and big data for predictive analytics of governmental action; RentSpree, a software suite for landlords that automates tenant applications and renter verification; Resident, a direct-to-consumer home furnishings company; and Shift5, which provides real-time visibility and cybersecurity for defense, aviation, and rail systems.

New fund likely raising soon

The firm's newest fund is 4 to 7 years past its first sale and no newer Form D has been filed.

01 · Says / Does

TagSaysDoesHistorically (to 2020)
StagesSeed, Series A, GrowthNot enough dated dealsSeed, Series A
SectorsAI infra, Devtools, Cybersecurity, Enterprise SaaS, Fintech, Consumer, HealthtechNot enough dated dealsEnterprise SaaS, Ecommerce, Consumer, Data analytics, Media, Devtools
RegionsCA, NYNot enough dated dealsNY, CA

Says: what the firm's funds state. Does: from 0 dated deals in the last 24 months.

Historical focus (through 2020), derived from historical deal data.

YearDealsTop sectors
20132Consumer, Ecommerce, Enterprise SaaS
20149Data analytics, Consumer, Enterprise SaaS
20157Enterprise SaaS, Consumer, Ecommerce
201610Consumer, Enterprise SaaS, AI applications
20177Ecommerce, Consumer, AI applications
20185Data analytics, Ecommerce, Enterprise SaaS
20196Cybersecurity, Devtools, Digital health
20206Enterprise SaaS, Devtools, Ecommerce

Stage mix over time

2013 Seed: 2132014 Seed: 52014 Series A: 2142015 Seed: 5152016 Pre-seed: 12016 Seed: 42016 Series A: 42016 Growth: 1162017 Seed: 42017 Series A: 2172018 Seed: 22018 Series A: 22018 Series B: 1182019 Seed: 42019 Series A: 2192020 Seed: 42020 Series A: 12020 Series B: 120212223242526
  • Pre-seed
  • Seed
  • Series A
  • Series B
  • Growth
Share of rounds by stage, per year. Striped years have fewer than 3 rounds.Historical focus (through 2020), derived from historical deal data.
Rounds by stage and year
YearPre-seedSeedSeries ASeries BGrowth
201302000
201405200
201505000
201614401
201704200
201802210
201904200
202004110
202100000
202200000
202300000
202400000
202500000
202600000

02 · Fund history

FundYearSizeStatus
645 Ventures IV, L.P.

645 Ventures is an early-stage venture firm backing relentless founders with purity of motivation, earned secrets, obsessed problem-solving, and non-consensus thinking. It invests across enterprise, deep tech, AI infrastructure and DevTools, fintech, consumer, cybersecurity, and health tech, writing seed through growth-stage checks. Inferred from the firm's website

2022$194.47M (Form D)Late investment period
645 Ventures Select I, L.P.

645 Ventures is an early-stage venture firm backing relentless founders with purity of motivation, earned secrets, obsessed problem-solving, and non-consensus thinking. It invests across enterprise, deep tech, AI infrastructure and DevTools, fintech, consumer, cybersecurity, and health tech, writing seed through growth-stage checks. Inferred from the firm's website

2022$153.01M (Form D)Late investment period
645 Ventures III, L.P.2020$160M (Form D)Follow-ons only

03 · People across funds

04 · Recent deals

No dated deals found yet.

05 · Latest from the firm

No news from the firm's website yet.

06 · Sources

  1. HTTP://645VENTURES.COM/
  2. https://airtable.com/appGb8jJGlicUkjgn/pagSRwwW1RXpwNtZr/form
  3. https://645ventures.com/portfolio/shift5
  4. https://645ventures.com/portfolio/fiscalnote
  5. https://645ventures.com/portfolio/resident-home
  6. https://645ventures.com/portfolio/rentspree
  7. https://645ventures.com/

Fund dates and sizes are from SEC Form D filings.

Last verified: Oct 28, 2026