Tectonic Therapeutic, Inc. (TECX) Insider Ownership

Historic Insider Ownership Trends

TECX's three largest insider shareholders as of April 28, 2026 are Timothy A Springer (Director, 5.84Mn shares), Braden Michael Leonard (TenPercentOwner, 4.77Mn shares), Geoffrey Mackay (President Ceo, 633.13K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Timothy A Springer - 4,334,846 1,503,358 11 Apr, 2025
Braden Michael Leonard - 0 4,768,262 15 May, 2024
Geoffrey Mackay President Ceo 188,012 445,123 26 Jan, 2023
Terrance Mcguire - 0 573,062 07 Apr, 2025
Alise Reicin Chief Executive Officer 311,547 127,030 05 Mar, 2026
Braden Michael Leonard - 33,333 400,355 25 Jun, 2024
Timothy A Springer - 0 186,134 26 Sep, 2024
Christian Cortis Chief Operating Officer 126,368 0 24 Jun, 2024
Marcella K. Ruddy Chief Medical Officer 68,747 0 03 Apr, 2026
Daniel Lochner Chief Financial Officer 58,544 0 05 Mar, 2026
Azadeh Golipour Chief Technology Officer 55,872 0 05 Feb, 2024
Peter Mcnamara Chief Scientific Officer 55,285 0 09 Mar, 2026
Marc Schwabish Chief Business Officer 45,314 0 05 Mar, 2026
Erik Ostrowski Interim Ceo, President And Cfo 29,285 0 05 Feb, 2024
Stefan Vitorovic - 0 27,774 24 Jun, 2024
Steven Avruch Chief Legal Officer 22,022 0 05 Feb, 2024
Essra Ridha Chief Medical Officer 15,881 0 05 Feb, 2024
Philip J. Vickers - 4,800 0 08 Jul, 2021
Praveen P. Tipirneni - 3,037 0 24 Jun, 2024

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
01 Apr, 2026 Francois Nader Stock Option (Right to Buy) A 20,400 $0.00 20,400 D A
01 Apr, 2026 Marcella K. Ruddy Common Stock D 1,000 $31.05 68,747 D S
06 Mar, 2026 Marcella K. Ruddy Common Stock D 10,000 $30.00 69,747 D S
06 Mar, 2026 Peter Mcnamara Common Stock A 2,500 $2.38 61,332 D M
06 Mar, 2026 Peter Mcnamara Common Stock A 215 $14.71 61,547 D M
06 Mar, 2026 Peter Mcnamara Common Stock D 6,047 $30.00 55,500 D S
06 Mar, 2026 Peter Mcnamara Common Stock D 215 $35.00 55,285 D S
06 Mar, 2026 Peter Mcnamara Employee Stock Option (Right to Buy) D 2,500 - 31,959 D M
06 Mar, 2026 Peter Mcnamara Employee Stock Option (Right to Buy) D 215 $0.00 8,045 D M
04 Mar, 2026 Marc Schwabish Common Stock A 19,500 $0.00 45,314 D A
03 Mar, 2026 Peter Mcnamara Common Stock D 1,649 $22.06 37,482 D S
11 Feb, 2026 Alise Reicin Common Stock A 2,500 $21.10 127,030 I P
04 Mar, 2026 Marcella K. Ruddy Common Stock A 26,500 $0.00 79,747 D A
04 Mar, 2026 Alise Reicin Common Stock A 76,500 $0.00 311,547 D A
04 Mar, 2026 Daniel Lochner Common Stock A 26,500 $0.00 58,544 D A
04 Mar, 2026 Peter Mcnamara Common Stock A 23,000 $0.00 60,482 D A
04 Mar, 2026 Marc Schwabish Employee Stock Option (Right to Buy) A 17,750 $0.00 17,750 D A
04 Mar, 2026 Daniel Lochner Employee Stock Option (Right to Buy) A 24,250 $0.00 24,250 D A
04 Mar, 2026 Marcella K. Ruddy Employee Stock Option (Right to Buy) A 24,250 $0.00 24,250 D A
04 Mar, 2026 Peter Mcnamara Common Stock D 1,650 $25.00 58,832 D S