Tectonic Therapeutic TECX Insider Ownership

NASDAQ TECX
$23.34 -0.17 (-0.72%)
At close: Sep 29, 2026 · 4:00 PM EDT

Insider Holdings by Owner

7.06Mn Shares

Insider Ownership Statistics

as of 30 Sep, 2026
Insider Ownership
40.98%
▼-0.0021% pp QoQ
Shares Held by Insiders
7.77Mn
filed for Sep 2026
▼-0.01% QoQ
Shares Outstanding
18.96Mn
18,964,008 shares
Direct Holdings
4.91Mn
Indirect: 2.86Mn
Net Shares Traded (QoQ)
-400
net selling in Sep 2026
Insiders Holding Shares
16
with Form 4 holdings on file

Shares Owned by Insiders

Shares held % of outstanding
Latest —
Average ownership —
Peak ownership —

Shares Purchased/Sold by Insiders

Bought Sold
Latest quarter —
Net over range —
Buying quarters —

Insider Ownership Summary

Quarter ending 30 Sep, 2026

As of September 29, 2026, the three largest insider holders of TECX are Timothy A Springer (Director, 5.84Mn shares), Terrance Mcguire (Director, 573.06K shares), Braden Michael Leonard (TenPercentOwner, 397.34K shares).

Form 4 Holdings

Insiders Holding TECX

Insiders 16
Shares held 7.06Mn
Of outstanding 37.23%
# Insider Position Direct Indirect Total Share of Insiders Last Filed
1 Timothy A Springer Director, TenPercentOwner 4,334,846 1,503,358 5,838,204 82.7% 11 Apr, 2025
2 Terrance Mcguire Director 0 573,062 573,062 8.1% 07 Apr, 2025
3 Alise Reicin Chief Executive Officer 310,623 0 310,623 4.4% 23 Jun, 2026
4 Marcella K. Ruddy Chief Medical Officer 67,682 0 67,682 1.0% 06 May, 2026
5 Daniel Lochner Chief Financial Officer 58,544 0 58,544 0.8% 05 Mar, 2026
6 Peter Mcnamara Chief Scientific Officer 55,285 0 55,285 0.8% 26 Aug, 2026
7 Geoffrey Mackay President Ceo 15,667 37,092 52,759 0.7% 26 Jan, 2023
8 Marc Schwabish Chief Business Officer 45,314 0 45,314 0.6% 05 Mar, 2026
9 Braden Michael Leonard Other 2,778 33,362 36,139 0.5% 25 Jun, 2024
10 Christian Cortis Chief Operating Officer 10,530 0 10,530 0.1% 24 Jun, 2024
11 Azadeh Golipour Chief Technology Officer 4,656 0 4,656 0.1% 05 Feb, 2024
12 Erik Ostrowski Interim Ceo, President And Cfo 2,440 0 2,440 0.0% 05 Feb, 2024
13 Stefan Vitorovic Director 0 2,314 2,314 0.0% 24 Jun, 2024
14 Steven Avruch Chief Legal Officer 1,835 0 1,835 0.0% 05 Feb, 2024
15 Essra Ridha Chief Medical Officer 1,323 0 1,323 0.0% 05 Feb, 2024
16 Praveen P. Tipirneni Director 253 0 253 0.0% 24 Jun, 2024

Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.

Form 4 Filings

314 Insider Transactions

Source SEC Form 4
Latest quarter Sep 2026
Download Data
Date Insider Position Transaction Shares Price Value Shares Held After Ownership
03 Sep, 2026 Daniel Lochner Chief Financial Officer Acquired A 24,250 $0.00 $0 24,250 Direct
03 Sep, 2026 Alise Reicin Chief Executive Officer Acquired A 69,250 $0.00 $0 69,250 Direct
03 Sep, 2026 Marcella K. Ruddy Chief Medical Officer Acquired A 24,250 $0.00 $0 24,250 Direct
03 Sep, 2026 Peter Mcnamara Chief Scientific Officer Acquired A 21,000 $0.00 $0 21,000 Direct
03 Sep, 2026 Marc Schwabish Chief Business Officer Acquired A 17,750 $0.00 $0 17,750 Direct
25 Aug, 2026 Peter Mcnamara Chief Scientific Officer Acquired M 43 $14.71 $633 55,328 Direct
25 Aug, 2026 Peter Mcnamara Chief Scientific Officer Disposed S 43 $36.52 $1.57K 55,285 Direct
25 Aug, 2026 Peter Mcnamara Chief Scientific Officer Disposed M 43 $0.00 $0 7,787 Direct
12 Aug, 2026 Peter Mcnamara Chief Scientific Officer Acquired M 43 $14.71 $633 55,328 Direct
12 Aug, 2026 Peter Mcnamara Chief Scientific Officer Disposed S 43 $35.00 $1.51K 55,285 Direct
12 Aug, 2026 Peter Mcnamara Chief Scientific Officer Disposed M 43 $0.00 $0 7,830 Direct
30 Jun, 2026 Peter Mcnamara Chief Scientific Officer Acquired M 172 $14.71 $2.53K 55,457 Direct
30 Jun, 2026 Peter Mcnamara Chief Scientific Officer Disposed S 172 $35.00 $6.02K 55,285 Direct
30 Jun, 2026 Peter Mcnamara Chief Scientific Officer Disposed M 172 $0.00 $0 7,873 Direct
20 Jun, 2026 Alise Reicin Chief Executive Officer Disposed F 924 $30.34 $28.03K 310,623 Direct
11 Jun, 2026 Daniel Lochner Chief Financial Officer Acquired A 7,500 $0.00 $0 7,500 Direct
09 Jun, 2026 Timothy A Springer Director, TenPercentOwner Acquired A 10,200 $0.00 $0 10,200 Direct
09 Jun, 2026 Praveen P. Tipirneni Director Acquired A 10,200 $0.00 $0 10,200 Direct
09 Jun, 2026 Phillip B. Donenberg Director Acquired A 10,200 $0.00 $0 10,200 Direct
08 Jun, 2026 Jessica Caroline Chutter Director Acquired A 20,400 $0.00 $0 20,400 Direct