Tomas Kiselak

Companies

• Korsana Biosciences, Inc.Board member Sep 10, 2026 to now¹
• CRESCENT BIOPHARMA, INC.Board member Jun 23, 2025 to now²
• Jade Biosciences, Inc.Board member May 1, 2025 to now³
• Zenas BioPharma, Inc.Board member Sep 12, 2024 to now⁴
• Oruka Therapeutics, Inc.Board member Sep 6, 2024 to now⁵
• Apogee Therapeutics, Inc.Board member Jul 17, 2023 to now⁶
• Aeglea BioTherapeuticsBoard member Jun 30, 2023 to now⁷
• Viridian Therapeutics, Inc.\DEBoard member Oct 28, 2020 to now⁸
• Magenta TherapeuticsBoard member Sep 13, 2023 to Oct 1, 2024⁹

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• ABAeglea BioTherapeutics SYRE9,184,458 shares¹⁰$728.6M at $79.33Jun 30, 2023
• MTMagenta Therapeutics DNTH2,700,691 shares¹¹$194.7M at $72.09Oct 1, 2024
• OTOruka Therapeutics, Inc. ORKA2,573,308 shares¹²$190.1M at $73.87Jul 1, 2026
• ZBZenas BioPharma, Inc. ZBIO2,359,025 shares¹³$60.0M at $25.45Mar 31, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jul 1, 2026Sold 3,553,410 shares at $84.43 of Oruka Therapeutics, Inc.¹²
• Jul 1, 2026Converted 3,553,410 shares of Oruka Therapeutics, Inc.¹²
• Mar 31, 2026Bought 150,000 shares at $20.00 of Zenas BioPharma, Inc.¹³
• Sep 17, 2025Granted 333,340 shares at $15.00 of Oruka Therapeutics, Inc.¹⁴
• Nov 19, 2024Exercised options 160,000 shares of Oruka Therapeutics, Inc.¹⁵
• Sep 27, 2024Other 62,146 shares of Magenta Therapeutics¹¹
• Sep 11, 2024Granted 275,000 shares at $23.00 of Oruka Therapeutics, Inc.¹⁶
• Apr 1, 2024Other 58,857 shares of Magenta Therapeutics¹⁷
• Apr 1, 2024Other 58,857 shares of Magenta Therapeutics¹⁷
• Sep 26, 2023Bought 30,000 shares at $13.15 of Magenta Therapeutics¹⁸
• Sep 19, 2023Bought 30,000 shares at $13.20 of Magenta Therapeutics¹⁹
• Sep 13, 2023Bought 9,367 shares at $11.76 of Magenta Therapeutics²⁰
• Sep 12, 2023Bought 14,887 shares at $10.85 of Magenta Therapeutics²⁰