Lewis T. Williams

Director, BECKMAN COULTER INC.

Companies

Protagonist Therapeutics, IncBoard member Jun 8, 2017 to now¹
Arcellx, Inc.Board member Feb 3, 2022 to Feb 9, 2022²
Neurogene Inc.Board member Aug 12, 2019 to May 13, 2021³

Holdings

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

Shares held

Protagonist Therapeutics, Inc PTGX7,825 shares⁴$1.0M at $134.03Feb 17, 2026
Arcellx, Inc.2,095,114 shares⁵Feb 8, 2022

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

Recent filings

Feb 17, 2026Sold 18,000 shares at $82.42 of Protagonist Therapeutics, Inc⁴
Feb 17, 2026Exercised options 18,000 shares at $10.84 of Protagonist Therapeutics, Inc⁴
Jan 2, 2026Granted 2,695 shares of Protagonist Therapeutics, Inc⁶
Jan 2, 2025Granted 5,130 shares of Protagonist Therapeutics, Inc⁷
Feb 8, 2022Converted 2,095,114 shares of Arcellx, Inc.⁵

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARProtagonist Therapeutics, Inc, Board member
2
SEC EDGARArcellx, Inc., Board member
3
SEC EDGARNeurogene Inc., Board member
4
SEC EDGARProtagonist Therapeutics, Inc shares after the filing of Feb 17, 2026
5
SEC EDGARArcellx, Inc. shares after the filing of Feb 8, 2022
6
SEC EDGARForm 4 filed Jan 6, 2026
7
SEC EDGARForm 4 filed Jan 6, 2025