What does Sebastian Siemiatkowski invest in?
Sebastian Siemiatkowski invests most often at Series A and Series C (100% of the rounds on record).
Sweden · Investor
Last cheque observed Jul 2025. Silence since then is not evidence of inactivity: our sources miss unannounced rounds.
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4 rounds on record
Mostly Series A and Series C: 100% of its rounds
Every round we can evidence, newest first4 appearances
1 round
1 round
2 rounds
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 investors most often in the same rounds as Sebastian Siemiatkowski. A count of rooms they were both in, not a relationship either has claimed.
The latest companies Sebastian Siemiatkowski put money into.
6 episodes naming Sebastian Siemiatkowski in the title.

20VC: SaaS is Dead: Why Systems of Record Will Die in an Agentic World | What Revenue Multiple Will Software Companies Trade At? | From 7,000 to 3,000: We Need Less People Than Ever with Sebastian Siemiatkowski

Crémieux & Kian on Nucleus Genomics, Michael Kratsios on Genesis, Nvidia Responds to TPU Progress | Kian Sadeghi, Joe Weisenthal, Sebastian Siemiatkowski, David Faugno, Keller Rinaudo, Royce Branning
WithKeller Rinaudo
MentionsSebastian Siemiatkowski

Klarna's IPO CEO Sebastian Siemiatkowski

LIVE @ NYSE for Klarna IPO | Peter Tuchman, Sebastian Siemiatkowski, Lynn Martin, David Sandstrom, Mati Staniszewski, Andrew Reed, Markus Villig
WithAndrew ReedDavid Sandstrom
MentionsMarkus VilligMati StaniszewskiSebastian Siemiatkowski

Klarna CEO Sebastian Siemiatkowski on the IPO, Loving Walmart, and Embracing AI
MentionsSebastian Siemiatkowski

Tesla Robotaxis Go Live, OpenAI Pulls Jony Ive Promotional Materials, Iran Updates | Yacine, Farzad Mesbahi, Sebastian Siemiatkowski, Jon Chu, Eric Romo & Thomas Mueller, Derek Thompson, Alex Robinson, Jesse Zhang
WithAlex RobinsonJesse ZhangJon Chu
MentionsSebastian SiemiatkowskiKhosla VenturesRichard Branson+1
Sebastian Siemiatkowski invests most often at Series A and Series C (100% of the rounds on record).
4 investments on record, 0 of them in the last 12 months. The most recent was in Jul 2025.
Its most recent investments on record: Lovable (Series A, Jul 2025) and Depop (Series C, Jun 2019).
The median round it joins is $131M.
No investments in the last 12 months; the latest was in Jul 2025.
Most often Creandum (2 rounds together).
Sebastian Siemiatkowski is an angel based in Sweden.
From 4 articles and filings naming it in a round, public registers and its own website, checked and rebuilt every night.
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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