Robert Chess

Companies

• Twist BioscienceBoard member Oct 30, 2018 to now¹
• Nektar TherapeuticsBoard member Sep 21, 2007 to now²
• Nektar TherapeuticsChair Feb 24, 2006 to Mar 22, 2007³
• Nektar TherapeuticsChief executive officer Jun 30, 2006 to Jan 9, 2007⁴

Holdings

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

Shares held

• TBTwist Bioscience TWST63,612 shares⁵$9.3M at $146.81Aug 11, 2026
• NTNektar Therapeutics NKTR19,159 shares⁶$722.7K at $37.72Sep 25, 2026

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

Recent filings

• Sep 23, 2026Granted 2,000 shares of Nektar Therapeutics⁶
• Aug 7, 2026Sold 18,417 shares at $110.89 of Twist Bioscience⁵
• Aug 7, 2026Exercised options 18,417 shares at $11.89 of Twist Bioscience⁵
• Mar 17, 2026Sold 10,000 shares at $47.00 of Twist Bioscience⁷
• Mar 17, 2026Exercised options 10,000 shares at $11.89 of Twist Bioscience⁷
• Feb 13, 2026Sold 2,184 shares at $48.26 of Twist Bioscience⁸
• Feb 5, 2026Granted 5,095 shares of Twist Bioscience⁹
• Feb 7, 2025Sold 2,940 shares at $53.14 of Twist Bioscience¹⁰
• Feb 5, 2025Granted 4,472 shares of Twist Bioscience¹¹
• Jan 7, 2025Sold 5,000 shares at $50.00 of Twist Bioscience¹²
• Dec 5, 2024Sold 709 shares at $52.45 of Twist Bioscience¹³
• Dec 5, 2024Sold 2,795 shares at $51.70 of Twist Bioscience¹³
• Dec 5, 2024Exercised options 3,504 shares at $8.82 of Twist Bioscience¹³
• Nov 11, 2024Sold 1,276 shares at $47.76 of Twist Bioscience¹⁴
• Nov 11, 2024Sold 2,324 shares at $46.99 of Twist Bioscience¹⁴
• Nov 11, 2024Exercised options 3,600 shares at $8.82 of Twist Bioscience¹⁴
• Jun 14, 2024Sold 19,500 shares at $1.20 of Nektar Therapeutics¹⁵
• Feb 8, 2024Sold 4,110 shares at $34.98 of Twist Bioscience¹⁶
• Feb 6, 2024Granted 5,815 shares of Twist Bioscience¹⁶
• Feb 7, 2023Granted 8,212 shares of Twist Bioscience¹⁷
• Sep 22, 2022Sold 5,100 shares at $3.19 of Nektar Therapeutics¹⁸
• Sep 22, 2022Sold 10,200 shares at $0.67 of Nektar Therapeutics¹⁹
• Sep 16, 2022Granted 10,200 shares of Nektar Therapeutics²⁰
• Feb 8, 2022Granted 3,491 shares of Twist Bioscience²¹
• Feb 4, 2022Sold 253 shares at $58.88 of Twist Bioscience²²