Bruce Booth

Insider Reports History

Location
890 Winter Street, Suite 320, Waltham, MA
Signature
/s/ Ommer Chohan, Attorney-in-Fact
All insider transactions
Transactions in reports broken out by “transaction date” reported in original SEC filing, see here for transactions aggregated across transaction date

Holdings reported by Bruce Booth:

Stock Role Class Num Shares Value Price $ Report Date Ownership
Sionna Therapeutics, Inc. Director Common Stock 2.31M $84.1M $36.42 Oct 21, 2025 By Atlas Venture Fund XI, L.P.
Kymera Therapeutics, Inc. Director Common Stock 723K $28.4M $39.26 Jul 9, 2024 Indirect
Sionna Therapeutics, Inc. Director Common Stock 687K $25M $36.42 Oct 21, 2025 By Atlas Venture Opportunity Fund II, L.P.
Vigil Neuroscience, Inc. Director Stock Option Award (Right to Buy) 0 $138K $7.62 Aug 5, 2025 Direct
Vigil Neuroscience, Inc. Director Common Stock 0 $0 $2.41 Aug 5, 2025 By Atlas Venture Fund XII, L.P.
Vigil Neuroscience, Inc. Director Common Stock 0 $0 $2.41 Aug 5, 2025 By Atlas Venture Opportunity Fund I, L.P.
Vigil Neuroscience, Inc. Director Common Stock 0 $0 $2.41 Aug 5, 2025 Direct
Magenta Therapeutics, Inc. Director Stock Option (Right to Buy) 20K Jun 28, 2022 Direct
Sionna Therapeutics, Inc. Director Non-Qualified Stock Option (right to buy) 20K Jun 12, 2025 Direct
AVROBIO, Inc. Director Stock Option (Right to Buy) 17.6K Jun 6, 2023 Direct
Kymera Therapeutics, Inc. Director Stock Option (Right to Buy) 16K Jun 25, 2025 Direct
Sionna Therapeutics, Inc. Director Series A convertible preferred stock 0 Feb 10, 2025 By Atlas Venture Fund XI, L.P.
Sionna Therapeutics, Inc. Director Series B convertible preferred stock 0 Feb 10, 2025 By Atlas Venture Fund XI, L.P.
Sionna Therapeutics, Inc. Director Series C convertible preferred stock 0 Feb 10, 2025 By Atlas Venture Fund XI, L.P.
Sionna Therapeutics, Inc. Director Series C convertible preferred stock 0 Feb 10, 2025 By Atlas Venture Opportunity Fund II, L.P.
Sionna Therapeutics, Inc. Director Series Seed convertible preferred stock 0 Feb 10, 2025 By Atlas Venture Fund XI, L.P.

Insider Reports Filed by Bruce Booth

Symbol Company Period Transactions Value $ Form Type Date Filed Role
SION Sionna Therapeutics, Inc. Oct 21, 2025 10 -$3.04M 4 Oct 21, 2025 Director
SION Sionna Therapeutics, Inc. Oct 16, 2025 18 -$9.25M 4 Oct 20, 2025 Director
SION Sionna Therapeutics, Inc. Oct 10, 2025 12 -$5.94M 4 Oct 15, 2025 Director
SION Sionna Therapeutics, Inc. Oct 3, 2025 4 -$1.49M 4 Oct 7, 2025 Director
SION Sionna Therapeutics, Inc. Sep 29, 2025 6 -$2.37M 4 Oct 1, 2025 Director
VIGL Vigil Neuroscience, Inc. Aug 5, 2025 10 $0 4 Aug 5, 2025 Director
KYMR Kymera Therapeutics, Inc. Jun 25, 2025 1 $0 4 Jun 26, 2025 Director
SION Sionna Therapeutics, Inc. Jun 12, 2025 1 $0 4 Jun 16, 2025 Director
VIGL Vigil Neuroscience, Inc. May 22, 2025 1 $0 4 May 23, 2025 Director
VIGL Vigil Neuroscience, Inc. Mar 3, 2025 1 $0 4 Mar 4, 2025 Director
SION Sionna Therapeutics, Inc. Feb 10, 2025 8 $1.08M 4 Feb 10, 2025 Director
SION Sionna Therapeutics, Inc. Feb 6, 2025 0 $0 3 Feb 6, 2025 Director
KYMR Kymera Therapeutics, Inc. Jul 9, 2024 10 -$17.3M 4 Jul 9, 2024 Director
KYMR Kymera Therapeutics, Inc. Jun 18, 2024 1 $0 4 Jun 20, 2024 Director
KYMR Kymera Therapeutics, Inc. Jun 12, 2024 6 -$950K 4 Jun 14, 2024 Director
VIGL Vigil Neuroscience, Inc. Jun 5, 2024 1 $0 4 Jun 7, 2024 Director
VIGL Vigil Neuroscience, Inc. May 3, 2024 8 -$147K 4 May 7, 2024 Director
KYMR Kymera Therapeutics, Inc. Mar 14, 2024 12 -$5.13M 4 Mar 15, 2024 Director
KYMR Kymera Therapeutics, Inc. Mar 11, 2024 12 -$14.9M 4 Mar 13, 2024 Director
VIGL Vigil Neuroscience, Inc. Mar 1, 2024 1 $0 4 Mar 5, 2024 Director
KYMR Kymera Therapeutics, Inc. Jun 15, 2023 1 $0 4 Jun 20, 2023 Director
VIGL Vigil Neuroscience, Inc. Jun 7, 2023 1 $0 4 Jun 9, 2023 Director
AVRO AVROBIO, Inc. Jun 6, 2023 1 $0 4 Jun 8, 2023 Director
VIGL Vigil Neuroscience, Inc. Mar 1, 2023 1 $74K 4 Mar 3, 2023 Director
KYMR Kymera Therapeutics, Inc. Jan 11, 2023 4 -$3.82M 4 Jan 13, 2023 Director
KYMR Kymera Therapeutics, Inc. Dec 14, 2022 12 -$12M 4 Dec 16, 2022 Director
KYMR Kymera Therapeutics, Inc. Nov 2, 2022 4 -$6.6M 4 Nov 4, 2022 Director
KYMR Kymera Therapeutics, Inc. Oct 28, 2022 8 -$8.74M 4 Nov 1, 2022 Director
DNTH Magenta Therapeutics, Inc. Jun 28, 2022 1 $0 4 Jun 30, 2022 Director
KYMR Kymera Therapeutics, Inc. Jun 15, 2022 1 $0 4 Jun 16, 2022 Director
VIGL Vigil Neuroscience, Inc. Jun 9, 2022 1 $0 4 Jun 13, 2022 Director
AVRO AVROBIO, Inc. Jun 8, 2022 2 $0 4 Jun 10, 2022 Director
VIGL Vigil Neuroscience, Inc. Mar 1, 2022 1 $73K 4 Mar 3, 2022 Director
VIGL Vigil Neuroscience, Inc. Jan 11, 2022 5 $7.49M 4 Jan 11, 2022 Director
VIGL Vigil Neuroscience, Inc. Jan 6, 2022 0 $0 3 Jan 6, 2022 Director
KYMR Kymera Therapeutics, Inc. Aug 11, 2021 1 -$14.8M 4 Aug 12, 2021 Director
KYMR Kymera Therapeutics, Inc. Jun 16, 2021 1 $0 4 Jun 17, 2021 Director
AVRO AVROBIO, Inc. Jun 10, 2021 1 $0 4 Jun 14, 2021 Director
DNTH Magenta Therapeutics, Inc. Jun 1, 2021 1 $0 4 Jun 3, 2021 Director