United States Biotechnology & Medical Research

Tectonic Therapeutic Inc (TECX)

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Over the past 90 days, Tectonic Therapeutic Inc. insiders have engaged in three transactions, all of which were sales totaling approximately $43,661. These transactions follow a period of mixed stock performance and a recent earnings report that missed expectations. Insider activity has been characterized exclusively by selling, with no reported open-market purchases during this period.
Ticker: TECX Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Insider trades have triggered activity signals for Tectonic Therapeutic Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Trades
Planned sale 30 Jun 2026
Value US$479,918.14 | Price 91.46 | Shares 54,695 (+17.2%)
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-07-01 2026-06-30 PlS Planned sale
McNamara Peter

Chief Scientific Officer

Officer
54,695 +17.2%
91.46
US$479,918 		54,695 +17.2% 91.46 US$479,918
2026-06-30 2026-06-30 PrS Proposed sale
PETER MCNAMARA

Officer

Officer
66,770
56.75
US$2,506,466 		66,770 56.75 US$2,506,466
2026-05-06 2026-05-04 PlS Planned sale
Ruddy Marcella K.

Chief Medical Officer

Officer
1,279 +49.4%
333.05
US$1,426,244 		1,279 +49.4% 333.05 US$1,426,244
2026-04-03 2026-04-01 PlS Planned sale
Ruddy Marcella K.

Chief Medical Officer

Officer
1,000 -1.4%
31.05
US$31,050 		1,000 -1.4% 31.05 US$31,050
2026-03-09 2026-03-06 PlS Planned sale
Ruddy Marcella K.

Chief Medical Officer

Officer
10,000 -12.5%
30.00
US$300,000 		10,000 -12.5% 30.00 US$300,000
2026-03-09 2026-03-06 PlS Planned sale
McNamara Peter

Chief Scientific Officer

Officer
215 -0.4%
35.00
US$7,525 		215 -0.4% 35.00 US$7,525
2026-03-09 2026-03-06 PlS Planned sale
McNamara Peter

Chief Scientific Officer

Officer
6,047 -9.8%
30.00
US$181,410 		6,047 -9.8% 30.00 US$181,410
2026-03-06 2026-03-06 PrS Proposed sale
PETER MCNAMARA

Officer

Officer
6,262
27.85
US$174,397 		6,262 27.85 US$174,397
2026-03-06 2026-03-06 PrS Proposed sale
MARCELLA RUDDY

Officer

Officer
12,065
27.85
US$336,010 		12,065 27.85 US$336,010
2026-03-05 2026-03-04 PlS Planned sale
McNamara Peter

Chief Scientific Officer

Officer
1,650 -2.7%
25.00
US$41,250 		1,650 -2.7% 25.00 US$41,250
2026-03-04 2026-03-04 PrS Proposed sale
PETER MCNAMARA

Officer

Officer
1,650
24.40
US$40,252 		1,650 24.40 US$40,252
2026-03-05 2026-03-03 PlS Planned sale
McNamara Peter

Chief Scientific Officer

Officer
1,649 -4.2%
22.06
US$36,377 		1,649 -4.2% 22.06 US$36,377
2026-03-03 2026-03-03 PrS Proposed sale
PETER MCNAMARA

Officer

Officer
1,649
23.00
US$37,927 		1,649 23.00 US$37,927
2026-02-12 2026-02-11 B Purchase
3.3
REICIN ALISE

Chief Executive Officer

Executive Director
2,500 +1.1%
21.10
US$52,750 		2,500 +1.1% 21.10 US$52,750
2026-02-11 2026-02-10 B Purchase
3.3
Lochner Daniel

Chief Financial Officer

Officer
6,000 +23.0%
21.61
US$129,660 		6,000 +23.0% 21.61 US$129,660
2025-04-11 2025-04-11 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
53,706 +3.7%
16.31
US$875,945 		53,706 +3.7% 16.31 US$875,945
2025-04-11 2025-04-11 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
9,478 +0.2%
16.31
US$154,586 		9,478 +0.2% 16.31 US$154,586
2025-04-11 2025-04-10 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
45,858 +3.3%
16.73
US$767,204 		45,858 +3.3% 16.73 US$767,204
2025-04-11 2025-04-10 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
8,092 +0.2%
16.73
US$135,379 		8,092 +0.2% 16.73 US$135,379
2025-04-11 2025-04-09 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
4,856 +0.3%
15.23
US$73,957 		4,856 +0.3% 15.23 US$73,957
2025-04-11 2025-04-09 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
16,215 +1.2%
14.62
US$237,063 		16,215 +1.2% 14.62 US$237,063
2025-04-11 2025-04-09 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
857 +0.0%
15.23
US$13,052 		857 +0.0% 15.23 US$13,052
2025-04-11 2025-04-09 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
2,861 +0.1%
14.62
US$41,828 		2,861 +0.1% 14.62 US$41,828
2025-04-09 2025-04-07 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
412,500 +42.5%
17.10
US$7,053,750 		412,500 +42.5% 17.10 US$7,053,750
2025-04-09 2025-04-07 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
87,500 +2.1%
17.10
US$1,496,250 		87,500 +2.1% 17.10 US$1,496,250
2025-04-07 2025-04-07 S Sale
1.4
MCGUIRE TERRANCE
Non-Executive Director
500,000 -46.6%
17.10
US$8,550,000 		500,000 -46.6% 17.10 US$8,550,000
2025-02-07 2025-02-05 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
660,000 +212.8%
50.00
US$33,000,000 		660,000 +212.8% 50.00 US$33,000,000
2025-02-07 2025-02-05 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
129,294 +3.2%
54.14
US$6,999,977 		129,294 +3.2% 54.14 US$6,999,977
2025-02-07 2025-02-05 B Purchase
3.3
Lochner Daniel

Chief Financial Officer

Officer
4,617 +inf%
54.14
US$249,964 		4,617 +inf% 54.14 US$249,964
2024-10-24 2024-10-22 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
300,000 +7.9%
33.59
US$10,077,000 		300,000 +7.9% 33.59 US$10,077,000
2024-09-26 2024-09-26 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
2,400 +0.1%
30.87
US$74,088 		2,400 +0.1% 30.87 US$74,088
2024-09-26 2024-09-26 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
4,070 +0.1%
30.10
US$122,507 		4,070 +0.1% 30.10 US$122,507
2024-09-26 2024-09-26 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
18,999 +0.5%
29.13
US$553,441 		18,999 +0.5% 29.13 US$553,441
2024-09-26 2024-09-26 B Purchase
3.4
SPRINGER TIMOTHY A
Non-Executive Director Large shareholder
24,531 +0.7%
28.16
US$690,793 		24,531 +0.7% 28.16 US$690,793
2024-05-15 2024-05-14 B Purchase
2.9
Leonard Braden Michael
Large shareholder
296,882 +6.6%
1.30
US$385,947 		296,882 +6.6% 1.30 US$385,947
2024-05-15 2024-05-13 B Purchase
2.9
Leonard Braden Michael
Large shareholder
216,053 +5.1%
1.26
US$272,227 		216,053 +5.1% 1.26 US$272,227
2024-05-15 2024-05-13 B Purchase
2.9
Leonard Braden Michael
Large shareholder
253,700 +6.3%
1.24
US$313,320 		253,700 +6.3% 1.24 US$313,320
2023-07-14 2023-07-14 PrS Proposed sale
Petersen Deanna M

Officer

Officer
128,648
1.38
US$177,534 		128,648 1.38 US$177,534
2023-06-07 2023-06-07 PrS Proposed sale
Geoff MacKay

Former CEO
146,927
1.18
US$173,374 		146,927 1.18 US$173,374
2023-06-05 2023-06-05 PrS Proposed sale
Geoff MacKay

Former CEO
7,152
1.11
US$7,939 		7,152 1.11 US$7,939
2023-05-25 2023-05-25 PrS Proposed sale
Geoff MacKay

Former CEO
186,841
1.22
US$227,946 		186,841 1.22 US$227,946
2023-05-24 2023-05-24 PrS Proposed sale
Geoff MacKay

Former CEO
292,215
196.21
US$57,336,601 		292,215 196.21 US$57,336,601
2023-05-24 2023-05-24 PrS Proposed sale
The Mac C. MacKay Irrevocable Trust

Child of former CEO
72,604
789.72
US$57,336,601 		72,604 789.72 US$57,336,601
2023-05-24 2023-05-24 PrS Proposed sale
The Kali M MacKay Irrevocable Trust DTD 1/6/2022

Child of Former CEO
72,604
789.72
US$57,336,601 		72,604 789.72 US$57,336,601
2021-02-18 2021-02-17 B Purchase
1.3
Donenberg Phillip B.
Non-Executive Director
2,000 +inf%
11.71
US$23,420 		2,000 +inf% 11.71 US$23,420
2020-02-14 2020-02-12 PlS Planned sale
MACKAY GEOFFREY

See Remarks

Executive Director
1,400 -0.4%
29.07
US$40,692 		1,400 -0.4% 29.07 US$40,692
2020-02-11 2020-02-11 PlS Planned sale
PAIGE CHRISTOPHER
Non-Executive Director
15,000 -5.6%
28.00
US$420,000 		15,000 -5.6% 28.00 US$420,000
2020-02-11 2020-02-11 PlS Planned sale
MACKAY GEOFFREY

See Remarks

Executive Director
18,404 -5.0%
28.10
US$517,099 		18,404 -5.0% 28.10 US$517,099
2020-02-11 2020-02-11 PlS Planned sale
MACKAY GEOFFREY

See Remarks

Executive Director
44,596 -10.9%
27.36
US$1,219,982 		44,596 -10.9% 27.36 US$1,219,982
2020-01-30 2020-01-28 PlS Planned sale
PAIGE CHRISTOPHER
10,000 -3.6%
23.00
US$230,000 		10,000 -3.6% 23.00 US$230,000
2019-07-23 2019-07-19 B Purchase
3.4
Booth Bruce
810,811 +17.0%
18.50
US$15,000,004 		810,811 +17.0% 18.50 US$15,000,004
2019-07-23 2019-07-19 B Purchase
3.3
Atlas Venture Fund X, L.P.
Large shareholder
810,811 +17.0%
18.50
US$15,000,004 		810,811 +17.0% 18.50 US$15,000,004
2019-04-09 2019-04-08 PlS Planned sale
PAIGE CHRISTOPHER
100 -0.0%
26.92
US$2,692 		100 -0.0% 26.92 US$2,692
2019-04-09 2019-04-08 PlS Planned sale
PAIGE CHRISTOPHER
2,400 -0.9%
25.84
US$62,021 		2,400 -0.9% 25.84 US$62,021
2019-04-09 2019-04-08 PlS Planned sale
MACKAY GEOFFREY

See Remarks

Executive Director
698 -0.2%
27.07
US$18,893 		698 -0.2% 27.07 US$18,893
2019-04-09 2019-04-05 PlS Planned sale
PAIGE CHRISTOPHER
867 -0.3%
26.21
US$22,724 		867 -0.3% 26.21 US$22,724
2019-04-09 2019-04-05 PlS Planned sale
PAIGE CHRISTOPHER
6,633 -2.3%
25.59
US$169,759 		6,633 -2.3% 25.59 US$169,759
2019-04-09 2019-04-05 PlS Planned sale
MACKAY GEOFFREY

See Remarks

Executive Director
13,302 -3.1%
27.26
US$362,618 		13,302 -3.1% 27.26 US$362,618
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