Mark Eisner

Companies

• Jade Biosciences, Inc.Board member Jun 26, 2026 to now¹
• Zura Bio LtdBoard member Feb 24, 2026 to now²
• VIR BiotechnologyEVP and Chief Medical Officer Jun 3, 2024 to now³
• KYNTRA BIO, INC.Incoming Chief Medical Officer Dec 3, 2020 to Sep 8, 2023⁴

Holdings

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

Shares held

• VBVIR Biotechnology VIR154,024 shares⁵$1.6M at $10.52Feb 25, 2026
• KBKYNTRA BIO, INC. KYNB159,917 shares⁶$857.2K at $5.36Sep 6, 2023

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

Recent filings

• Feb 25, 2026Sold 1,889 shares at $9.82 of VIR Biotechnology⁵
• Feb 24, 2026Sold 1,616 shares at $9.53 of VIR Biotechnology⁵
• Feb 23, 2026Sold 2,089 shares at $7.45 of VIR Biotechnology⁷
• Feb 22, 2026Granted 55,000 shares of VIR Biotechnology⁷
• Jul 17, 2025Sold 3,586 shares at $5.47 of VIR Biotechnology⁸
• Jul 15, 2025Sold 6,796 shares at $5.47 of VIR Biotechnology⁸
• Feb 22, 2025Granted 40,000 shares of VIR Biotechnology⁹
• Jul 15, 2024Granted 75,000 shares of VIR Biotechnology¹⁰
• Sep 6, 2023Shares withheld for tax 1,860 shares at $0.96 of KYNTRA BIO, INC.⁶
• Sep 1, 2023Shares withheld for tax 1,085 shares at $1.06 of KYNTRA BIO, INC.¹¹
• Jun 7, 2023Sold 2,042 shares at $17.04 of KYNTRA BIO, INC.¹²
• Jun 2, 2023Sold 1,090 shares at $18.83 of KYNTRA BIO, INC.¹³
• Apr 4, 2023Sold 9,182 shares at $18.78 of KYNTRA BIO, INC.¹⁴
• Mar 10, 2023Sold 6,255 shares at $20.20 of KYNTRA BIO, INC.¹⁵
• Mar 10, 2023Sold 3,885 shares at $20.20 of KYNTRA BIO, INC.¹⁵
• Mar 8, 2023Granted 12,451 shares of KYNTRA BIO, INC.¹⁵
• Mar 8, 2023Granted 7,732 shares of KYNTRA BIO, INC.¹⁵
• Mar 8, 2023Sold 7,363 shares at $21.16 of KYNTRA BIO, INC.¹⁵
• Mar 2, 2023Sold 1,187 shares at $21.87 of KYNTRA BIO, INC.¹⁶
• Feb 21, 2023Granted 32,500 shares of KYNTRA BIO, INC.¹⁷
• Dec 1, 2022Shares withheld for tax 1,084 shares at $15.04 of KYNTRA BIO, INC.¹⁸
• Sep 30, 2022Shares withheld for tax 6,777 shares at $13.01 of KYNTRA BIO, INC.¹⁹
• Sep 1, 2022Shares withheld for tax 756 shares at $13.09 of KYNTRA BIO, INC.²⁰
• Jun 1, 2022Shares withheld for tax 1,141 shares at $9.61 of KYNTRA BIO, INC.²¹
• Mar 31, 2022Shares withheld for tax 6,442 shares at $12.02 of KYNTRA BIO, INC.²²