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EcoR1 Capital

357 Tehama Street, Floor 3, San Francisco, CA, 94103, United States

Overview

Investment advisory firm focused on the biotech industry.

Founded

2012

Deals ยท 12mo

1

Links

WebsiteLinkedIn

Stage focus

Series A
Series B
Series C

Geographic focus

United States

Sector focus

Biotechnology
Financial Services

Investment portfolio

78rounds
NAMEDATESIZE
Diagonal Therapeutics
Jan 2026Participated
$125 MSeries B
Attovia Therapeutics
Apr 2025Participated
$90 MSeries C
Scorpion Therapeutics
Jul 2024Participated
$150 MSeries C
Bicycle Therapeutics
May 2024Participated
$555 MOther Equity
Ajax Therapeutics
May 2024Participated
$95 MSeries C
Attovia Therapeutics
May 2024Participated
$105 MSeries B
BridgeBio Oncology Therapeutics
May 2024Participated
$200 MOther Equity
Accent Therapeutics
Jan 2024Participated
$75 MSeries C
Terremoto Biosciences
Nov 2023Participated
$175 MSeries B
ReCode Therapeutics
Sep 2023Participated
$50 MSeries B
Actio Biosciences
Sep 2023Participated
$55 MSeries A
ElevateBio
May 2023Participated
$401 MSeries D
Diagonal Therapeutics
Jan 2026Participated
$125 MSeries B
Attovia Therapeutics
Apr 2025Participated
$90 MSeries C
Scorpion Therapeutics
Jul 2024Participated
$150 MSeries C
Bicycle Therapeutics
May 2024Participated
$555 MOther Equity
Ajax Therapeutics
May 2024Participated
$95 MSeries C
Attovia Therapeutics
May 2024Participated
$105 MSeries B
BridgeBio Oncology Therapeutics
May 2024Participated
$200 MOther Equity
Accent Therapeutics
Jan 2024Participated
$75 MSeries C
Terremoto Biosciences
Nov 2023Participated
$175 MSeries B
ReCode Therapeutics
Sep 2023Participated
$50 MSeries B
Actio Biosciences
Sep 2023Participated
$55 MSeries A
ElevateBio
May 2023Participated
$401 MSeries D
78
Items
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Insights

Time horizon

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Deal Distribution

EcoR1 Capital: 78 funding rounds are recorded in the selected participation categories.All available history.
EcoR1 Capital: 78 funding rounds are recorded in the selected participation categories. All available history
Round typeLed dealsParticipated deals
Series A313
Series B523
Series C+123
Other Equity27
Debt01

Monthly Deal Activity

EcoR1 Capital: 78 deals are recorded across 155 months.All available history.
EcoR1 Capital: 78 deals are recorded across 155 months. All available history
MonthDeals
Dec '131
Jan '140
Feb '140
Mar '141
Apr '140
May '140
Jun '140
Jul '140
Aug '140
Sep '142
Oct '140
Nov '140
Dec '141
Jan '150
Feb '150
Mar '153
Apr '151
May '150
Jun '152
Jul '150
Aug '153
Sep '151
Oct '150
Nov '150
Dec '151
Jan '161
Feb '160
Mar '160
Apr '160
May '160
Jun '160
Jul '160
Aug '160
Sep '160
Oct '160
Nov '160
Dec '160
Jan '171
Feb '170
Mar '170
Apr '170
May '170
Jun '170
Jul '171
Aug '170
Sep '170
Oct '170
Nov '172
Dec '171
Jan '181
Feb '181
Mar '182
Apr '181
May '181
Jun '180
Jul '180
Aug '180
Sep '182
Oct '180
Nov '180
Dec '181
Jan '191
Feb '192
Mar '191
Apr '190
May '192
Jun '190
Jul '190
Aug '190
Sep '190
Oct '191
Nov '191
Dec '190
Jan '200
Feb '200
Mar '203
Apr '201
May '200
Jun '201
Jul '200
Aug '203
Sep '203
Oct '200
Nov '200
Dec '201
Jan '212
Feb '213
Mar '211
Apr '212
May '212
Jun '211
Jul '210
Aug '210
Sep '210
Oct '211
Nov '210
Dec '210
Jan '221
Feb '221
Mar '220
Apr '220
May '220
Jun '220
Jul '220
Aug '221
Sep '220
Oct '220
Nov '220
Dec '220
Jan '230
Feb '230
Mar '230
Apr '230
May '231
Jun '230
Jul '230
Aug '230
Sep '232
Oct '230
Nov '231
Dec '230
Jan '241
Feb '240
Mar '240
Apr '240
May '244
Jun '240
Jul '241
Aug '240
Sep '240
Oct '240
Nov '240
Dec '240
Jan '250
Feb '250
Mar '250
Apr '251
May '250
Jun '250
Jul '250
Aug '250
Sep '250
Oct '250
Nov '250
Dec '250
Jan '261
Feb '260
Mar '260
Apr '260
May '260
Jun '260
Jul '260
Aug '260
Sep '260
Oct '260

Sector Breakdown

EcoR1 Capital: Health & Life Sciences is the largest displayed sector by deal count (78 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.

EcoR1 Capital: Health & Life Sciences is the largest displayed sector by deal count (78 deals). All available history
SectorDeals
Health & Life Sciences78
Space & Frontier Tech2
Developer Tools1
Consumer & Lifestyle1

Deal Size Distribution

EcoR1 Capital: 78 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.

EcoR1 Capital: 78 rounds have a disclosed size in the displayed size bands. All available history
Round size band (USD)Deals
<$5M0
$5M-$10M0
$10M-$25M3
$25M-$50M8
$50M-$100M32
$100M-$250M28
$250M-$500M5
$500M-$1B2
$1B+0

Deals By Geography

EcoR1 Capital: United States has the largest recorded deal count among the displayed regions (72 deals).All available history.

Top 3 of 3 regions; European countries are grouped as Europe.

EcoR1 Capital: United States has the largest recorded deal count among the displayed regions (72 deals). All available history
RegionDeals
United States72
Canada3
Europe3
EcoR1 Capital: 20 co-investors are shown, with Cormorant Asset Management sharing 18 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.

EcoR1 Capital: 20 co-investors are shown, with Cormorant Asset Management sharing 18 recorded deals. All available history
Co-investorShared deals
Cormorant Asset Management18
Fidelity Management & Research Company18
OrbiMed18
RA Capital Management15
Samsara BioCapital15
Boxer Capital14
Surveyor Capital14
Casdin Capital13
Alexandria Venture Investments12
Janus Henderson Investors12
Polaris Partners12
Redmile Group12
Invus11
Omega Funds11
Vida Ventures11
ARCH Venture Partners10
Foresite Capital10
Google Ventures10
Logos Capital10
Wellington Management10

Investment Strategy

EcoR1 Capital: Led accounts for 14% and participating for 86% of round participation.All available history.
EcoR1 Capital: Led accounts for 14% and participating for 86% of round participation. All available history
CategoryDeals (count)Share (%)
Led1114%
Participating6786%
EcoR1 Capital: Single-lead accounts for 45% and co-led for 55% of lead dynamics.All available history.
EcoR1 Capital: Single-lead accounts for 45% and co-led for 55% of lead dynamics. All available history
CategoryDeals (count)Share (%)
Single-lead545%
Co-led655%

Team

Alex Tkachenko

Entrepreneur In Residence

Caroline Stout

Partner

Oleg Nodelman

Founder & Managing Director

Scott Perlen

CFO

Scott Platshon

Investor