John Sullivan is a Boston-based Venture Partner at Two Bear Capital who brings more than 25 years of specialized experience in healthcare and life sciences trend analysis, including his previous role as Director of Research and Healthcare Investment Strategist at Leerink Partners where he oversaw healthcare research and strategy. He acts as a go-to speaker and advisor for founders on how to raise Seed and Series A from biotech investors, translating his institutional research background into practical fundraising and positioning guidance for early-stage biotech teams.
About their Fund
Sectors
Biotech, Health, AI, Cybersecurity, Enterprise
Rounds
Pre-Seed - Series B+
Avg Check Size
$3M - $10M
Notable Investments
Two Bear Capital operates a technical-first investing model with partners like neuroscientist Jenna Aronson leading biotech deals using their own lab-grade expertise, while explicitly fusing deep tech and life sciences in one fund where the same team underwrites both quantum security and drug discovery companies. The firm is headquartered in Whitefish, Montana, where they're building Two Bear Labs as a shared life-science facility and positioning themselves as a bridge between frontier security technology serving federal and defense buyers rather than purely commercial markets.
Other partners at the fund
Notable Fund
Investments
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Sheets they're in
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Sheets they're Fund is in
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Popular Investors
investor name
Active in
Rounds
Avg. Check
Links
Deeptech / Hardware
Robotics
Biotech
+
12
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Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
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Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Defense
Deeptech / Hardware
Energy
+
7
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$100K - $5M
Unknown
Biotech
Health
Deeptech / Hardware
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$250K - $2M
Unknown
Climate
Deeptech / Hardware
Materials
+
4
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Unknown
Pre-Seed - Seed
Unknown
$400K - $1.5M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
7
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
$400K - $2M
Unknown
Deeptech / Hardware
Robotics
Biotech
+
2
View more in profile...
Unknown
Pre-Seed - Seed
Unknown
~$750K
Unknown
Fintech
Deeptech / Hardware
Devtools
+
2
View more in profile...
Unknown
Pre-Seed - Series A
Unknown
$250K-$1M
Unknown
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