Insider Holders & Insider Ownership - Tectonic Therapeutic Inc. (TECX)

List of insiders holdings for Tectonic Therapeutic Inc.:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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# Insider Holder Name Report
Date Time		 Shares Owned
Directly
Indirectly		 Total
Shares Owned		 Filing
1 SPRINGER TIMOTHY A
Director
10% Owner		 2025-04-11 18:12:08 4,334,846
1,689,492		 6,024,338 Form 4
2 ATLAS VENTURE ASSOCIATES X L.P.
10% Owner		 2020-02-18 21:51:43 4,756,478
0		 4,756,478 Form 4
3 Requadt Scott
Director		 2018-06-25 18:18:34 0
2,962,325		 2,962,325 Form 4
4 Blackstone Holdings II L.P.
Blackstone Clarus III L.L.C.
Blackstone Holdings I
Blackstone Group L.P.
Blackstone Group Management L.L.C.
SCHWARZMAN STEPHEN A
10% Owner		 2019-01-15 09:24:04 0
2,962,325		 2,962,325 Form 3
5 SVLSF VI LLC
SV Life Sciences Fund VI L.P.
SV Life Sciences Fund VI Strategic Partners L.P.
SV Life Sciences Fund VI (GP) L.P.
10% Owner		 2021-02-16 16:02:55 1,417,204
0		 1,417,204 Form 13D
6 Leonard Braden Michael
Former 10% owner of AVROBIO		 2024-06-25 13:42:11 66,666
800,710		 867,376 Form 4
7 Atlas Venture Opportunity Fund I L.P.
Atlas Venture Associates Opportunity I L.P.
Atlas Venture Associates Opportunity I LLC
See Remarks		 2019-07-29 21:11:33 0
810,811		 810,811 Form 3
8 MCGUIRE TERRANCE
Director		 2025-04-07 17:19:24 657,976
0		 657,976 Form 13D
9 REICIN ALISE
Chief Executive Officer		 2025-02-06 16:05:06 316,297
124,530		 440,827 Form 4
10 MACKAY GEOFFREY
President & CEO		 2023-02-10 17:08:28 300,667
0		 300,667 Form 4
11 Cortis Christian
Chief Operating Officer		 2024-06-24 16:16:36 201,133
0		 201,133 Form 4
12 Golipour Azadeh
Chief Technology Officer		 2024-02-05 20:01:02 167,871
0		 167,871 Form 4
13 Dorton Katina
Chief Financial Officer		 2018-10-10 18:11:06 158,318
0		 158,318 Form 4
14 Ostrowski Erik
Interim CEO, President and CFO		 2024-02-05 19:57:30 149,534
0		 149,534 Form 4
15 Mason Christopher
Chief Scientific Officer		 2021-06-14 18:03:04 125,000
0		 125,000 Form 4
16 Avruch Steven
Chief Legal Officer		 2024-02-05 19:56:00 120,521
0		 120,521 Form 4
17 Ridha Essra
Chief Medical Officer		 2024-02-05 19:59:27 114,380
0		 114,380 Form 4
18 Petersen Deanna M
Chief Business Officer		 2023-02-10 17:16:35 86,667
0		 86,667 Form 4
19 Ruddy Marcella K.
Chief Medical Officer		 2025-02-06 16:05:11 82,443
0		 82,443 Form 4
20 Volck Birgitte
President of R&D		 2020-03-06 16:38:02 76,000
0		 76,000 Form 4
21 Atlas Venture Fund X L.P.
ATLAS VENTURE ASSOCIATES X L.P.
Atlas Venture Associates X LLC
10% Owner		 2024-10-28 18:08:43 67,567
0		 67,567 Form 13D
22 McNamara Peter
Chief Scientific Officer		 2025-02-06 16:05:14 56,859
0		 56,859 Form 4
23 Escolar Diana
Chief Medical Officer		 2021-06-14 17:55:42 50,000
0		 50,000 Form 4
24 Schwabish Marc
Chief Business Officer		 2025-02-06 16:05:14 44,219
0		 44,219 Form 4
25 Vitorovic Stefan
Director		 2024-06-24 16:35:35 11,760
27,774		 39,534 Form 4
26 KREHER NERISSA
Chief Medical Officer		 2018-10-10 18:05:27 27,571
0		 27,571 Form 4
27 Tipirneni Praveen P.
Director		 2024-06-24 16:32:33 26,963
0		 26,963 Form 4
28 Farfel Gail M
Director		 2023-06-08 16:28:51 17,643
0		 17,643 Form 4
29 PAIGE CHRISTOPHER
Director		 2023-06-08 16:31:34 17,643
0		 17,643 Form 4
30 Vickers Philip J.
Director		 2023-06-08 16:29:53 17,643
0		 17,643 Form 4
31 Booth Bruce
Director		 2023-06-08 16:27:43 17,643
0		 17,643 Form 4
32 Jenkins Annalisa
Director		 2023-06-08 16:26:42 17,643
0		 17,643 Form 4
33 CLARK IAN T
Director		 2023-06-08 16:25:47 17,643
0		 17,643 Form 4
34 Donenberg Phillip B.
Director		 2024-06-24 16:37:33 11,760
0		 11,760 Form 4
35 Lochner Daniel
Chief Financial Officer		 2025-02-07 16:19:30 4,617
0		 4,617 Form 4
36 Resnick Joshua
Director		 2018-06-20 20:04:18 0
0		 0 Form 3
37 Clarus Lifesciences III L.P.
Clarus Ventures III GP L.P.
10% Owner		 2019-08-05 18:52:38 0
0		 0 Form 13D
38 Clarus Lifesciences III L.P.
Clarus Ventures III GP L.P.
Clarus Ventures III LLC
10% Owner		 2019-08-05 18:52:38 0
0		 0 Form 13D