Stella Paffenholz is a senior associate at Atlas Venture, investing in early-stage biotech companies. She previously worked at Nextech Invest, McKinsey & Company, Apollo Health Ventures, and Merck KGaA.
What Stella can write
Career
- Merck KGaA
- Apollo Health Ventures
- McKinsey & Company
- Nextech Invest · principal
- Atlas Venture · senior associateNow
- Merck KGaA · pharmaceutical operations
- Apollo Health Ventures · venture building
- McKinsey & Company · strategy
Investments named in public bios
Focus
Education
Also at Atlas Venture
Partners like Stella
At firms with a similar stage, sector and check size.
Alert me when Atlas Venture is active
One email when Stella's firm raises a fund, adds a partner or shows new activity.
Send Mode VC your deck
Raising a pre-seed or seed round? We write $1M to $5M first checks and help founders with distribution. A partner reads every deck.
Send your deckQuestions
Who is Stella Paffenholz?
Stella Paffenholz is a senior associate at Atlas Venture, investing in early-stage biotech companies. She previously worked at Nextech Invest, McKinsey & Company, Apollo Health Ventures, and Merck KGaA.
How much does Stella Paffenholz invest?
Atlas Venture has not reported a check size. It invests at seed, series a.
How do I pitch Stella Paffenholz?
A warm intro from a founder Atlas Venture backed works best.
What did Stella Paffenholz do before Atlas Venture?
Merck KGaA; Apollo Health Ventures; McKinsey & Company; principal at Nextech Invest; pharmaceutical operations at Merck KGaA; venture building at Apollo Health Ventures; strategy at McKinsey & Company.
Last updated 2026-10-15. Is this you? Ask for a correction.