United States · Investor

Mark Leslie

Last cheque observed Mar 2026; 19 cheques on record.

AngelDeploying now

Seed

Deploying now
100%of best year1cheques in 12 months, 19 on record
Since the last cheque241days00hrs00min00sec
Median round$58MRounds led0 of 19Mostly inUnited States, 88%
Pitch Mark Leslie

Mark Leslie highlights

  1. 01

    1 cheques in the last 12 months

  2. 02

    Mostly Seed and Series A: 67% of its rounds

What they do

Type
Angel (from a list, unverified)
Cheque size
Not stated
Stages
Seed
Based in
United States
Cold pitches
Not stated

The record

Every round we can evidence, newest first19 appearances

  1. 2026

    1 round

  2. Mar
    AMI LabsFR · TechCrunch$1.0BWith 24 others
  3. 2022

    1 round

  4. Jul
    AI21 LabsSeries B · IL · Ahren Innovation Capital$64MWith 5 others
  5. 2019

    2 rounds

  6. Nov
    NinesSeries A · US · FinSMEs$17MWith 3 others
  7. Aug
    ClumioUS · FinSMEs$51MWith 2 others
  8. 2016

    2 rounds

  9. Nov
    Gusto$90MWith 103 others
  10. Jan
    ThoughtSpot$50MWith 9 others
  11. 2015

    2 rounds

  12. Jun
    Minio, Inc.Seed · US$3.3MWith 9 others
  13. Jan
    The LeagueSeed · US$2.1MWith 12 others
  14. 2014

    2 rounds

  15. Aug
    PernixDataSeries C · US$35MWith 8 others
  16. Jun
    PinroseSeed · US$1.8MWith 5 others
  17. 2013

    2 rounds

  18. Aug
    CloudPhysicsSeries B · US · techcrunch.com$10MWith 4 others
  19. May
    PernixDataSeries B · US · forbes.com$20MWith 4 others
  20. 2012

    2 rounds

  21. Dec
    GustoSeed · US · techcrunch.com$6.1MWith 25 others
  22. Jan
    PernixDataSeries A · US · venturebeat.com$7.0MWith 3 others
  23. 2011

    1 round

  24. Mar
    HealthTapSeed · US · techcrunch.com$2.4MWith 4 others
  25. 2010

    2 rounds

  26. Jul
    Big Switch NetworksSeed · US$1.5MWith 4 others
  27. Jan
    HealthTapSeed · USUndisclosedWith 7 others
  28. 2008

    1 round

  29. May
    OportunSeries C · US$11MWith 6 others
  30. 2007

    1 round

  31. Jan
    db4objectsSeries A · USUndisclosedWith 4 others

An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor.

The team

We hold 1 person at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.

Who they invest alongside

The investors most often in the same rounds as Mark Leslie. A count of rooms they were both in, not a relationship either has claimed.

Recently backed

The latest companies Mark Leslie put money into.

On podcasts

2 episodes naming Mark Leslie in the title, and 3 more that mention it.

Mentioned in

Quick answers about Mark Leslie

What does Mark Leslie invest in?

Mark Leslie invests most often at Seed and Series A (67% of the rounds on record).

How active is Mark Leslie?

19 investments on record, 1 of them in the last 12 months. The most recent was in Mar 2026.

What has Mark Leslie invested in recently?

Its most recent investments on record: AMI Labs (Undisclosed round, Mar 2026), AI21 Labs (Series B, Jul 2022) and Nines (Series A, Nov 2019).

How big are Mark Leslie's cheques?

The median round it joins is $58M.

Does Mark Leslie lead rounds?

Rarely, if at all: none of its 19 investments on record names it as the lead.

Where does Mark Leslie invest?

Most of the companies it backs are in the United States (88%), France (6%) and Israel (6%).

Is Mark Leslie investing now?

Yes: it is actively investing, with 1 investments in the last 12 months.

Who does Mark Leslie invest alongside?

Most often Kleiner Perkins Caufield & Byers (4 rounds together), Lightspeed Venture Partners (4 rounds together) and General Catalyst (3 rounds together).

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Built from the rounds we watched, its filings and its own website, refreshed every night. How we count · Report a correction · Is this your firm? Claim it