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Willett Advisors

650 Madison Ave 17th Floor, New York, NY, 10022, United States

Overview

Philanthropic asset management for long-term capital appreciation.

Founded

2010

Deals · 12mo

3

Links

WebsiteLinkedIn

Stage focus

Series B
Series C
Series D

Geographic focus

Italy
United Kingdom
United States

Sector focus

—

Investment portfolio

18rounds
NAMEDATESIZE
Cellares
Jan 2026Participated
$257 MSeries D
Kinaset Therapeutics
Jan 2026Participated
$103 MSeries B
AAVantgarde Bio
Nov 2025Participated
$141 MSeries B
Antares Therapeutics
Jun 2025Participated
$177 MSeries A
Robin AI
Nov 2024Led
$25 MSeries B
Scorpion Therapeutics
Jul 2024Participated
$150 MSeries C
Remix Therapeutics
Jan 2024Participated
$60 MOther Equity
Cellares
Aug 2023Participated
$255 MSeries C
Carmot Therapeutics
May 2023Participated
$150 MSeries E
Carmot Therapeutics
Jul 2022Participated
$160 MSeries D
NextRNA Therapeutics
Mar 2022Participated
$56 MSeries A
Disc Medicine
Sep 2021Participated
$90 MSeries B
Cellares
Jan 2026Participated
$257 MSeries D
Kinaset Therapeutics
Jan 2026Participated
$103 MSeries B
AAVantgarde Bio
Nov 2025Participated
$141 MSeries B
Antares Therapeutics
Jun 2025Participated
$177 MSeries A
Robin AI
Nov 2024Led
$25 MSeries B
Scorpion Therapeutics
Jul 2024Participated
$150 MSeries C
Remix Therapeutics
Jan 2024Participated
$60 MOther Equity
Cellares
Aug 2023Participated
$255 MSeries C
Carmot Therapeutics
May 2023Participated
$150 MSeries E
Carmot Therapeutics
Jul 2022Participated
$160 MSeries D
NextRNA Therapeutics
Mar 2022Participated
$56 MSeries A
Disc Medicine
Sep 2021Participated
$90 MSeries B
18
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Insights

Time horizon

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Deal Distribution

Willett Advisors: 18 funding rounds are recorded in the selected participation categories.All available history.
Willett Advisors: 18 funding rounds are recorded in the selected participation categories. All available history
Round typeLed dealsParticipated deals
Series A02
Series B15
Series C+08
Other Equity02

Monthly Deal Activity

Willett Advisors: 18 deals are recorded across 104 months.All available history.
Willett Advisors: 18 deals are recorded across 104 months. All available history
MonthDeals
Mar '181
Apr '180
May '180
Jun '180
Jul '180
Aug '181
Sep '180
Oct '180
Nov '180
Dec '180
Jan '190
Feb '190
Mar '190
Apr '190
May '190
Jun '190
Jul '190
Aug '191
Sep '190
Oct '190
Nov '190
Dec '190
Jan '200
Feb '200
Mar '200
Apr '200
May '200
Jun '200
Jul '200
Aug '200
Sep '201
Oct '200
Nov '200
Dec '200
Jan '210
Feb '210
Mar '210
Apr '210
May '211
Jun '210
Jul '211
Aug '210
Sep '211
Oct '210
Nov '210
Dec '210
Jan '220
Feb '220
Mar '221
Apr '220
May '220
Jun '220
Jul '221
Aug '220
Sep '220
Oct '220
Nov '220
Dec '220
Jan '230
Feb '230
Mar '230
Apr '230
May '231
Jun '230
Jul '230
Aug '231
Sep '230
Oct '230
Nov '230
Dec '230
Jan '241
Feb '240
Mar '240
Apr '240
May '240
Jun '240
Jul '241
Aug '240
Sep '240
Oct '240
Nov '241
Dec '240
Jan '250
Feb '250
Mar '250
Apr '250
May '250
Jun '251
Jul '250
Aug '250
Sep '250
Oct '250
Nov '251
Dec '250
Jan '262
Feb '260
Mar '260
Apr '260
May '260
Jun '260
Jul '260
Aug '260
Sep '260
Oct '260

Sector Breakdown

Willett Advisors: Health & Life Sciences is the largest displayed sector by deal count (15 deals).All available history.

A deal can appear in multiple sectors, so sector totals may overlap. Capital represents disclosed total round sizes, not fund cheque sizes.

Willett Advisors: Health & Life Sciences is the largest displayed sector by deal count (15 deals). All available history
SectorDeals
Health & Life Sciences15
AI & Machine Learning4
Manufacturing3
Enterprise Software2
Professional Services2
Crypto & Blockchain1
Fintech1
Transportation & Logistics1
Developer Tools1

Deal Size Distribution

Willett Advisors: 18 rounds have a disclosed size in the displayed size bands.All available history.

Undisclosed round sizes are excluded. Capital represents total round sizes, not fund cheque sizes.

Willett Advisors: 18 rounds have a disclosed size in the displayed size bands. All available history
Round size band (USD)Deals
<$5M0
$5M-$10M0
$10M-$25M0
$25M-$50M2
$50M-$100M6
$100M-$250M7
$250M-$500M3
$500M-$1B0
$1B+0

Deals By Geography

Willett Advisors: United States has the largest recorded deal count among the displayed regions (16 deals).All available history.

Top 2 of 2 regions; European countries are grouped as Europe.

Willett Advisors: United States has the largest recorded deal count among the displayed regions (16 deals). All available history
RegionDeals
United States16
Europe2
Willett Advisors: 20 co-investors are shown, with Atlas Venture sharing 6 recorded deals.All available history.

Co-Investors

Bubble size = shared deals

Click a bubble to open that fund in a new tab.

Shows up to 20 co-investors ranked by shared deals. Deals may be shared with multiple funds, so rows overlap. Capital is total round size, not fund cheque size.

Willett Advisors: 20 co-investors are shown, with Atlas Venture sharing 6 recorded deals. All available history
Co-investorShared deals
Atlas Venture6
5AM Ventures3
Avenir3
RA Capital Management3
Shumway Capital3
The Column Group3
Abingworth2
Alexandria Venture Investments2
Casdin Capital2
Decheng Capital2
Deep Track Capital2
DFJ Growth2
Eclipse Ventures2
Fidelity Management & Research Company2
Frazier Life Sciences2
Invus2
Janus Henderson Investors2
Lightspeed Venture Partners2
Morgan Noble Healthcare Partners2
OCV Partners2

Investment Strategy

Willett Advisors: Led accounts for 6% and participating for 94% of round participation.All available history.
Willett Advisors: Led accounts for 6% and participating for 94% of round participation. All available history
CategoryDeals (count)Share (%)
Led16%
Participating1794%
Willett Advisors: Single-lead accounts for 0% and co-led for 100% of lead dynamics.All available history.
Willett Advisors: Single-lead accounts for 0% and co-led for 100% of lead dynamics. All available history
CategoryDeals (count)Share (%)
Single-lead00%
Co-led1100%

Team

Brian Allen

Managing Director of Private Equity

Steven Rattner

Chairman and Chief Executive Officer