Stephen W. Webster's Insider Trades & SAST Disclosures

Stephen W. Webster's most recent trade in Gritstone Bio Inc was a trade of 103,600 Stock Option (Right to Buy) done . Disclosure was reported to the exchange on April 4, 2025.

Stock Client Name Client Category Action Reported to Exchange Quantity Post Transaction Holding Traded % Avg. Price Value Security Type
Gritstone Bio Inc
Stephen W. Webster Director Other type of transaction at price $ 0.00 per share. 04 Apr 2025 103,600 0 - - Stock Option (Right to Buy)
Gritstone Bio Inc
Stephen W. Webster Director Other type of transaction at price $ 0.00 per share. 04 Apr 2025 25,000 0 (0%) 0% 0 Common Stock
Gritstone Bio Inc
Stephen W. Webster Director Other type of transaction at price $ 0.00 per share. 04 Apr 2025 7,379 0 - - Stock Option (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 14 Mar 2025 6,240 6,240 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 14 Mar 2025 2,304 2,304 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 14 Mar 2025 900 900 - - Stock Options (Right to Buy)
Cullinan Oncology Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 26 Jun 2024 15,806 15,806 - - Stock Option (Right to Buy)
Nextcure Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 20 Jun 2024 18,700 18,700 - - Stock Option (Right to Buy)
Gritstone Bio Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 17 Jun 2024 7,379 7,379 - - Stock Option (Right to Buy)
Gritstone Bio Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 26 Apr 2024 103,600 103,600 - - Stock Option (Right to Buy)
Luxfer Holdings PLC
Stephen Webster M.D. Chief Financial Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 10.67 per share. 20 Mar 2024 2,043 20,431 (0%) 0% 10.7 21,799 Ordinary Shares
Luxfer Holdings PLC
M.D. Stephen Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 1,070 3,210 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
M.D. Stephen Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 1,070 22,423 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Webster Stephen M.D. Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 1,000 2,000 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
M.D. Webster Stephen Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 1,000 20,388 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Webster M.D. Stephen Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 800 21,266 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
M.D. Stephen Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 800 800 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
M.D. Stephen Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 750 0 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster M.D. Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 750 19,261 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster M.D. Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 127 0 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 127 19,388 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 87 21,353 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
M.D. Webster Stephen Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 87 92 - - Dividend Equivalent Rights
Luxfer Holdings PLC
M.D. Stephen Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 78 20,466 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Webster M.D. Stephen Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 78 165 - - Dividend Equivalent Rights
Luxfer Holdings PLC
M.D. Webster Stephen Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 51 22,474 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Webster M.D. Stephen Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 20 Mar 2024 51 160 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 18 Mar 2024 7,160 7,160 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Purchase of securities on an exchange or from another person at price $ 8.46 per share. 17 Nov 2023 1,200 18,025 (0%) 0% 8.5 10,152 Ordinary Shares
Cullinan Oncology Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 08 Jun 2023 18,450 18,450 - - Stock Option (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 16 Mar 2023 4,280 4,280 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 15.39 per share. 16 Mar 2023 1,783 16,138 (0%) 0% 15.4 27,440 Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 1,000 17,878 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 1,000 3,000 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 800 16,833 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 800 1,600 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 750 750 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 750 0 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 750 15,968 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 750 15,116 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 102 0 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 102 15,218 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 65 16,033 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 65 88 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 45 16,878 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 45 97 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 43 17,921 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 16 Mar 2023 43 91 - - Dividend Equivalent Rights
Cullinan Oncology Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 22 Jun 2022 16,475 16,475 - - Stock Option (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Payment of exercise price or tax liability using portion of securities received from the company at price $ 15.92 per share. 23 May 2022 3,240 13,805 (0%) 0% 15.9 51,580 Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 2,000 12,698 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 2,000 0 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 1,500 14,384 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 1,500 15,993 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 1,500 750 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 1,500 1,500 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 800 16,859 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 800 2,400 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 186 12,884 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 186 0 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 167 0 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 167 17,045 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 109 14,493 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 109 83 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 66 16,059 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 66 113 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 19 16,878 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 23 May 2022 19 80 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen M.D. Webster Chief Financial Officer Grant, award, or other acquisition of securities at price $ 0.00 per share. 14 Mar 2022 4,000 4,000 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 01 Dec 2021 1,800 0 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 01 Dec 2021 1,800 11,323 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Payment of exercise price or tax liability using portion of securities received from the company at price $ 19.41 per share. 01 Dec 2021 879 10,444 (0%) 0% 19.4 17,057 Ordinary Shares
Nextcure Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 24 Jun 2021 14,250 14,250 - - Stock Option (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Grant, award, or other acquisition of securities at price $ 0.00 per share. 15 Mar 2021 3,200 3,200 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Sale of securities on an exchange or to another person at price $ 13.33 per share. 09 Nov 2020 1,500 9,222 (0%) 0% 13.3 19,994 Ordinary Shares
Nextcure Inc
Stephen W. Webster Director Grant, award, or other acquisition of securities at price $ 0.00 per share. 11 Jun 2020 14,250 14,250 - - Stock Option (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 2,450 8,896 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 2,450 0 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 2,000 11,272 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 2,000 2,000 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 1,800 10,109 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 1,800 1,800 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.78 per share. 28 May 2020 1,319 7,809 (0%) 0% 14.8 19,495 Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.78 per share. 28 May 2020 1,036 10,343 (0%) 0% 14.8 15,312 Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.78 per share. 28 May 2020 932 9,272 (0%) 0% 14.8 13,775 Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 900 8,709 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 900 0 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 750 11,093 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 750 2,250 - - Stock Options (Right to Buy)
Luxfer Holdings PLC
Stephen Webster Corporate Controller Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.78 per share. 28 May 2020 485 8,309 (0%) 0% 14.8 7,168 Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Payment of exercise price or tax liability using portion of securities received from the company at price $ 14.78 per share. 28 May 2020 389 10,722 (0%) 0% 14.8 5,749 Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 232 9,128 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 232 0 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 107 130 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 107 11,379 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 95 10,204 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 95 117 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 85 8,794 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 85 0 - - Dividend Equivalent Rights
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 18 11,111 (0%) 0% - Ordinary Shares
Luxfer Holdings PLC
Stephen Webster Corporate Controller Exercise or conversion of derivative security received from the company (such as an option) at price $ 0.00 per share. 28 May 2020 18 85 - - Dividend Equivalent Rights
*All Values are in $ Million
Client Category: Promoter/ KMP/ Director / Immediate Relatives / Employee / etc  
Security Type: Share/ Warrants / Convertible Debentures
Data as reported to USA Exchanges
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