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United States Biotechnology & Medical Research

Taysha Gene Therapies Inc (TSHA)

Track

Over the last 90 days, Taysha Gene Therapies Inc. has seen two insider transactions, both sales totaling $1.82 million. Notably, President and Head of R&D Nagendran Sukumar sold shares valued at $892,000. The company's stock has experienced a 40.7% increase in the past 90 days, and its last earnings report missed expectations by 11.59%.
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Ticker: TSHA Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Nagendran Sukumar
President and Head of R&D
2 sales — total 1,818,000 USD
Planned sale 10 Apr 2026
Value US$1,895,144.05 | Price 432.39 | Shares 48,961
Proposed sale 10 Apr 2026
Value US$3,573,601.29 | Price 228.39 | Shares 88,149
Proposed sale 27 Feb 2026
Value US$2,240,770.98 | Price 192.22 | Shares 20,034
Sale 4 Feb 2026
Value US$7,480.60 | Price 4.52 | Shares 1,655
Proposed sale 4 Feb 2026
Value US$4,314.08 | Price 4.72 | Shares 914
Proposed sale 4 Feb 2026
Value US$3,289.84 | Price 4.72 | Shares 697
Proposed sale 4 Feb 2026
Value US$4,252.72 | Price 4.72 | Shares 901
Proposed sale 4 Feb 2026
Value US$7,811.60 | Price 4.72 | Shares 1,655
Proposed sale 4 Feb 2026
Value US$4,196.08 | Price 4.72 | Shares 889
Sale 26 Jan 2026
Value US$109,943.89 | Price 4.61 | Shares 23,849
Sale 26 Jan 2026
Value US$190,448.32 | Price 4.61 | Shares 41,312
Sale 26 Jan 2026
Value US$124,091.98 | Price 4.61 | Shares 26,918
Sale 23 Jan 2026
Value US$375,098.00 | Price 4.75 | Shares 78,968
Sale 23 Jan 2026
Value US$649,747.75 | Price 4.75 | Shares 136,789
Sale 23 Jan 2026
Value US$423,377.00 | Price 4.75 | Shares 89,132
Proposed sale 23 Jan 2026
Value US$152,964.68 | Price 5.09 | Shares 30,052
Proposed sale 23 Jan 2026
Value US$234,465.76 | Price 5.09 | Shares 46,064
Proposed sale 23 Jan 2026
Value US$279,522.44 | Price 5.09 | Shares 54,916
Proposed sale 23 Jan 2026
Value US$163,271.93 | Price 5.09 | Shares 32,077
Proposed sale 23 Jan 2026
Value US$513,306.14 | Price 5.09 | Shares 100,846
Proposed sale 23 Jan 2026
Value US$579,364.16 | Price 5.09 | Shares 113,824
Proposed sale 23 Jan 2026
Value US$855,517.02 | Price 5.09 | Shares 168,078
Planned sale 12 Jan 2026
Value US$942,000.00 | Price 4.71 | Shares 200,000
Proposed sale 12 Jan 2026
Value US$996,000.00 | Price 4.98 | Shares 200,000
Sale 1 Dec 2025
Value US$1,172,811.97 | Price 4.51 | Shares 260,047
Sale 28 Nov 2025
Value US$523,093.75 | Price 4.75 | Shares 110,125
Proposed sale 28 Nov 2025
Value US$1,799,035.92 | Price 4.86 | Shares 370,172
Proposed sale 22 Sep 2025
Value US$30,479.10 | Price 2.83 | Shares 10,770
Planned sale 10 Sep 2025
Value US$646,000.00 | Price 3.23 | Shares 200,000
Proposed sale 10 Sep 2025
Value US$652,000.00 | Price 3.26 | Shares 200,000
Sale 21 Aug 2025
Value US$155,299.35 | Price 2.85 | Shares 54,491
Sale 21 Aug 2025
Value US$162,603.90 | Price 2.85 | Shares 57,054
Proposed sale 21 Aug 2025
Value US$156,389.17 | Price 2.87 | Shares 54,491
Proposed sale 21 Aug 2025
Value US$56,263.48 | Price 2.87 | Shares 19,604
Proposed sale 21 Aug 2025
Value US$163,744.98 | Price 2.87 | Shares 57,054
Proposed sale 21 Aug 2025
Value US$79,183.30 | Price 2.87 | Shares 27,590
Proposed sale 21 Aug 2025
Value US$144,794.37 | Price 2.87 | Shares 50,451
Buy 30 May 2025
Value US$2,062,500.00 | Price 2.75 | Shares 750,000
Proposed sale 5 Jul 2024
Value US$36,268.35 | Price 2.15 | Shares 16,869
Proposed sale 5 Jul 2024
Value US$54,835.75 | Price 2.15 | Shares 25,505
Proposed sale 5 Jul 2024
Value US$71,670.25 | Price 2.15 | Shares 33,335
Buy 27 Jun 2024
Value US$2,999,999.25 | Price 2.25 | Shares 1,333,333
Buy 17 Nov 2023
Value US$163,000.00 | Price 1.63 | Shares 100,000
Planned sale 24 Aug 2023
Value US$76,890.00 | Price 2.33 | Shares 33,000
Proposed sale 24 Aug 2023
Value US$86,460.00 | Price 2.62 | Shares 33,000
Buy 16 Aug 2023
Value US$99,999.90 | Price 0.90 | Shares 111,111
Buy 16 Aug 2023
Value US$399,999.60 | Price 0.90 | Shares 444,444
Buy 16 Aug 2023
Value US$350,000.10 | Price 0.90 | Shares 388,889
Buy 16 Aug 2023
Value US$350,000.10 | Price 0.90 | Shares 388,889
Buy 16 Aug 2023
Value US$14,820,000.30 | Price 0.90 | Shares 16,466,667
Sale 13 Jul 2023
Value US$3,740.80 | Price 0.70 | Shares 5,344
Sale 12 Jul 2023
Value US$57,029.93 | Price 0.71 | Shares 80,528
Sale 23 Jun 2023
Value US$12,735.16 | Price 0.70 | Shares 18,100
Sale 22 Jun 2023
Value US$7,383.97 | Price 0.70 | Shares 10,508
Sale 21 Jun 2023
Value US$97,634.70 | Price 0.70 | Shares 138,962
Sale 20 Jun 2023
Value US$210,209.28 | Price 0.71 | Shares 295,653
Proposed sale 20 Jun 2023
Value US$699,572.40 | Price 0.70 | Shares 1,006,000
Proposed sale 20 Jun 2023
Value US$699,572.40 | Price 0.70 | Shares 1,006,000
Proposed sale 5 Jun 2023
Value US$14,913.67 | Price 0.70 | Shares 21,305
Proposed sale 5 Jun 2023
Value US$29,743.59 | Price 0.70 | Shares 42,491
Buy 16 May 2023
Value US$3,400.00 | Price 0.68 | Shares 5,000
Proposed sale 11 May 2023
Value US$41,796.75 | Price 2.11 | Shares 19,784
Buy 31 Oct 2022
Value US$3,000,000.00 | Price 2.00 | Shares 1,500,000
Planned sale 23 Aug 2022
Value US$11,537.75 | Price 3.47 | Shares 3,325
Planned sale 22 Aug 2022
Value US$34,009.50 | Price 3.50 | Shares 9,717
Planned sale 19 Aug 2022
Value US$43,057.50 | Price 3.75 | Shares 11,482
Planned sale 18 Aug 2022
Value US$28,932.12 | Price 3.87 | Shares 7,476
Planned sale 6 Jul 2022
Value US$33,943.24 | Price 3.79 | Shares 8,956
Planned sale 5 Jul 2022
Value US$13,706.55 | Price 3.51 | Shares 3,905
Planned sale 1 Jul 2022
Value US$84,448.19 | Price 3.53 | Shares 23,923
Planned sale 30 Jun 2022
Value US$51,678.24 | Price 3.72 | Shares 13,892
Planned sale 29 Jun 2022
Value US$46,954.44 | Price 3.81 | Shares 12,324
Buy 3 Feb 2022
Value US$208,559.68 | Price 7.84 | Shares 26,602
Buy 3 Feb 2022
Value US$392,000.00 | Price 7.84 | Shares 50,000
Buy 2 Feb 2022
Value US$170,940.00 | Price 7.77 | Shares 22,000
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
2026-04-13 2026-04-10 PlS Planned sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
48,961 +37.6%
432.39
US$1,895,144 		48,961 +37.6% 432.39 US$1,895,144
2026-04-10 2026-04-10 PrS Proposed sale
1.5
Nagendran Sukumar

Officer

Officer
88,149
228.39
US$3,573,601 		88,149 228.39 US$3,573,601
2026-02-27 2026-02-27 PrS Proposed sale
Rumana Haque-Ahmed

Officer

Officer
20,034
192.22
US$2,240,771 		20,034 192.22 US$2,240,771
2026-02-06 2026-02-04 S Sale
1.4
Alam Kamran

CHIEF FINANCIAL OFFICER

Officer
1,655 -0.1%
4.52
US$7,481 		1,655 -0.1% 4.52 US$7,481
2026-02-04 2026-02-04 PrS Proposed sale
Sean McAuliffe

Affiliate - Chief Business Officer

Officer
914
4.72
US$4,314 		914 4.72 US$4,314
2026-02-04 2026-02-04 PrS Proposed sale
Rumana Haque-Ahmed

Officer

Officer
697
4.72
US$3,290 		697 4.72 US$3,290
2026-02-04 2026-02-04 PrS Proposed sale
Emily McGinnis

Affiliate-Chief Pat. Adv. & Ext. Aff. Off.
901
4.72
US$4,253 		901 4.72 US$4,253
2026-02-04 2026-02-04 PrS Proposed sale
1.4
Kamran Alam

Officer

Officer
1,655
4.72
US$7,812 		1,655 4.72 US$7,812
2026-02-04 2026-02-04 PrS Proposed sale
Fred Porter

Affiliate-Chief of Staff & Tech.Op.Officer

Officer
889
4.72
US$4,196 		889 4.72 US$4,196
2026-01-27 2026-01-26 S Sale
1.4
Alam Kamran

CHIEF FINANCIAL OFFICER

Officer
23,849 -1.6%
4.61
US$109,944 		23,849 -1.6% 4.61 US$109,944
2026-01-27 2026-01-26 S Sale
1.1
Nolan Sean P.

Chief Executive Officer

Executive Director
41,312 -1.4%
4.61
US$190,448 		41,312 -1.4% 4.61 US$190,448
2026-01-27 2026-01-26 S Sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
26,918 -2.0%
4.61
US$124,092 		26,918 -2.0% 4.61 US$124,092
2026-01-27 2026-01-23 S Sale
1.4
Alam Kamran

CHIEF FINANCIAL OFFICER

Officer
78,968 -5.1%
4.75
US$375,098 		78,968 -5.1% 4.75 US$375,098
2026-01-27 2026-01-23 S Sale
1.1
Nolan Sean P.

Chief Executive Officer

Executive Director
136,789 -4.4%
4.75
US$649,748 		136,789 -4.4% 4.75 US$649,748
2026-01-27 2026-01-23 S Sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
89,132 -6.2%
4.75
US$423,377 		89,132 -6.2% 4.75 US$423,377
2026-01-23 2026-01-23 PrS Proposed sale
Rumana Haque-Ahmed

Officer

Officer
30,052
5.09
US$152,965 		30,052 5.09 US$152,965
2026-01-23 2026-01-23 PrS Proposed sale
Sean McAuliffe

Affiliate - Chief Business Officer

Officer
46,064
5.09
US$234,466 		46,064 5.09 US$234,466
2026-01-23 2026-01-23 PrS Proposed sale
Fred Porter

Affiliate-Chief of Staff & Tech.Op.Officer

Officer
54,916
5.09
US$279,522 		54,916 5.09 US$279,522
2026-01-23 2026-01-23 PrS Proposed sale
Emily McGinnis

Affiliate-Chief Pat. Adv. & Ext. Aff. Off.
32,077
5.09
US$163,272 		32,077 5.09 US$163,272
2026-01-23 2026-01-23 PrS Proposed sale
1.4
Kamran Alam

Officer

Officer
100,846
5.09
US$513,306 		100,846 5.09 US$513,306
2026-01-23 2026-01-23 PrS Proposed sale
1.5
Sukumar Nagendran

Officer

Officer
113,824
5.09
US$579,364 		113,824 5.09 US$579,364
2026-01-23 2026-01-23 PrS Proposed sale
1.1
Sean P. Nolan

Officer; Director

Executive Director
168,078
5.09
US$855,517 		168,078 5.09 US$855,517
2026-01-14 2026-01-12 PlS Planned sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
200,000 -16.6%
4.71
US$942,000 		200,000 -16.6% 4.71 US$942,000
2026-01-12 2026-01-12 PrS Proposed sale
1.5
Nagendran Sukumar

Officer

Officer
200,000
4.98
US$996,000 		200,000 4.98 US$996,000
2025-12-01 2025-12-01 S Sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
260,047 -20.5%
4.51
US$1,172,812 		260,047 -20.5% 4.51 US$1,172,812
2025-12-01 2025-11-28 S Sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
110,125 -9.9%
4.75
US$523,094 		110,125 -9.9% 4.75 US$523,094
2025-11-28 2025-11-28 PrS Proposed sale
1.5
Nagendran Sukumar

Officer

Officer
370,172
4.86
US$1,799,036 		370,172 4.86 US$1,799,036
2025-09-22 2025-09-22 PrS Proposed sale
Rumana Haque-Ahmed

Officer

Officer
10,770
2.83
US$30,479 		10,770 2.83 US$30,479
2025-09-12 2025-09-10 PlS Planned sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
200,000 -16.6%
3.23
US$646,000 		200,000 -16.6% 3.23 US$646,000
2025-09-10 2025-09-10 PrS Proposed sale
1.5
Nagendran Sukumar

Officer

Officer
200,000
3.26
US$652,000 		200,000 3.26 US$652,000
2025-08-22 2025-08-21 S Sale
1.4
Alam Kamran

CHIEF FINANCIAL OFFICER

Officer
54,491 -4.4%
2.85
US$155,299 		54,491 -4.4% 2.85 US$155,299
2025-08-22 2025-08-21 S Sale
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
57,054 -4.7%
2.85
US$162,604 		57,054 -4.7% 2.85 US$162,604
2025-08-21 2025-08-21 PrS Proposed sale
1.4
Kamran Alam

Officer

Officer
54,491
2.87
US$156,389 		54,491 2.87 US$156,389
2025-08-21 2025-08-21 PrS Proposed sale
Emily McGinnis

Affiliate-Chief Pat. Adv. & Ext. Aff. Off.
19,604
2.87
US$56,263 		19,604 2.87 US$56,263
2025-08-21 2025-08-21 PrS Proposed sale
1.5
Sukumar Nagendran

Officer; Director

Executive Director
57,054
2.87
US$163,745 		57,054 2.87 US$163,745
2025-08-21 2025-08-21 PrS Proposed sale
Sean McAuliffe

Affiliate - Chief Business Officer

Officer
27,590
2.87
US$79,183 		27,590 2.87 US$79,183
2025-08-21 2025-08-21 PrS Proposed sale
Fred Porter

Affiliate-Chief of Staff & Tech.Op.Officer

Officer
50,451
2.87
US$144,794 		50,451 2.87 US$144,794
2025-06-03 2025-05-30 B Purchase
4.0
Manning Paul B
Large shareholder
750,000 +35.9%
2.75
US$2,062,500 		750,000 +35.9% 2.75 US$2,062,500
2024-07-05 2024-07-05 PrS Proposed sale
McGinnis Emily

Affiliate-Chief Pat. Advo. & Ext. Affairs Officer

Officer
16,869
2.15
US$36,268 		16,869 2.15 US$36,268
2024-07-05 2024-07-05 PrS Proposed sale
McAuliffe Sean

Affiliate - Chief Business Officer

Officer
25,505
2.15
US$54,836 		25,505 2.15 US$54,836
2024-07-05 2024-07-05 PrS Proposed sale
Porter Fred

Affiliate - Chief of Staff & Tech. Op. Officer

Officer
33,335
2.15
US$71,670 		33,335 2.15 US$71,670
2024-07-01 2024-06-27 B Purchase
4.0
Manning Paul B
Large shareholder
1,333,333 +inf%
2.25
US$2,999,999 		1,333,333 +inf% 2.25 US$2,999,999
2023-11-20 2023-11-17 B Purchase
4.0
Manning Paul B
Large shareholder
100,000 +0.6%
1.63
US$163,000 		100,000 +0.6% 1.63 US$163,000
2023-08-25 2023-08-24 PlS Planned sale
1.4
Alam Kamran

Chief Financial Officer

Officer
33,000 -11.3%
2.33
US$76,890 		33,000 -11.3% 2.33 US$76,890
2023-08-24 2023-08-24 PrS Proposed sale
1.4
Kamran Alam

Officer

Officer
33,000
2.62
US$86,460 		33,000 2.62 US$86,460
2023-08-16 2023-08-16 B Purchase
1.3
Donenberg Phillip B.
Non-Executive Director
111,111 +3703.7%
0.90
US$100,000 		111,111 +3703.7% 0.90 US$100,000
2023-08-16 2023-08-16 B Purchase
1.1
Nolan Sean P.

Chief Executive Officer

Executive Director
444,444 +40.7%
0.90
US$400,000 		444,444 +40.7% 0.90 US$400,000
2023-08-16 2023-08-16 B Purchase
3.9
Stalfort John A III
Non-Executive Director
388,889 +63.7%
0.90
US$350,000 		388,889 +63.7% 0.90 US$350,000
2023-08-16 2023-08-16 B Purchase
3.9
Stalfort John A III
Non-Executive Director
388,889 +78.5%
0.90
US$350,000 		388,889 +78.5% 0.90 US$350,000
2023-08-16 2023-08-16 B Purchase
4.0
Manning Paul B
Large shareholder
16,466,667 +inf%
0.90
US$14,820,000 		16,466,667 +inf% 0.90 US$14,820,000
2023-07-14 2023-07-13 S Sale
1.3
Session R.A. II
Large shareholder
5,344 -0.1%
0.70
US$3,741 		5,344 -0.1% 0.70 US$3,741
2023-07-14 2023-07-12 S Sale
1.3
Session R.A. II
Large shareholder
80,528 -0.9%
0.71
US$57,030 		80,528 -0.9% 0.71 US$57,030
2023-06-26 2023-06-23 S Sale
1.3
Session R.A. II
Large shareholder
18,100 -0.2%
0.70
US$12,735 		18,100 -0.2% 0.70 US$12,735
2023-06-26 2023-06-22 S Sale
1.3
Session R.A. II
Large shareholder
10,508 -0.1%
0.70
US$7,384 		10,508 -0.1% 0.70 US$7,384
2023-06-22 2023-06-21 S Sale
1.3
Session R.A. II
Large shareholder
138,962 -1.5%
0.70
US$97,635 		138,962 -1.5% 0.70 US$97,635
2023-06-22 2023-06-20 S Sale
1.3
Session R.A. II
Large shareholder
295,653 -3.1%
0.71
US$210,209 		295,653 -3.1% 0.71 US$210,209
2023-06-20 2023-06-20 PrS Proposed sale
1.3
R. A. Session II

Affiliate
1,006,000
0.70
US$699,572 		1,006,000 0.70 US$699,572
2023-06-20 2023-06-20 PrS Proposed sale
1.3
R.A. Sessions II

Affiliate
1,006,000
0.70
US$699,572 		1,006,000 0.70 US$699,572
2023-06-01 2023-06-05 PrS Proposed sale
McAuliffe Sean

Affiliate - Chief Business Officer

Officer
21,305
0.70
US$14,914 		21,305 0.70 US$14,914
2023-06-01 2023-06-05 PrS Proposed sale
Porter Fred

Affiliate - Chief Technical Officer

Officer
42,491
0.70
US$29,744 		42,491 0.70 US$29,744
2023-05-18 2023-05-16 B Purchase
1.5
Nagendran Sukumar

President and Head of R&D

Executive Director
5,000 +17.1%
0.68
US$3,400 		5,000 +17.1% 0.68 US$3,400
2023-05-11 2023-05-11 PrS Proposed sale
McGinnis Emily

Affiliate
19,784
2.11
US$41,797 		19,784 2.11 US$41,797
2022-11-02 2022-10-31 B Purchase
4.0
Manning Paul B
Non-Executive Director Large shareholder
1,500,000 +1054.8%
2.00
US$3,000,000 		1,500,000 +1054.8% 2.00 US$3,000,000
2022-08-24 2022-08-23 PlS Planned sale
1.4
Alam Kamran

Chief Financial Officer

Officer
3,325 -1.2%
3.47
US$11,538 		3,325 -1.2% 3.47 US$11,538
2022-08-22 2022-08-22 PlS Planned sale
1.4
Alam Kamran

Chief Financial Officer

Officer
9,717 -3.5%
3.50
US$34,010 		9,717 -3.5% 3.50 US$34,010
2022-08-22 2022-08-19 PlS Planned sale
1.4
Alam Kamran

Chief Financial Officer

Officer
11,482 -4.0%
3.75
US$43,058 		11,482 -4.0% 3.75 US$43,058
2022-08-22 2022-08-18 PlS Planned sale
1.4
Alam Kamran

Chief Financial Officer

Officer
7,476 -2.5%
3.87
US$28,932 		7,476 -2.5% 3.87 US$28,932
2022-07-07 2022-07-06 PlS Planned sale
PRASAD SUYASH

CMO and Head of R&D

Officer
8,956 -1.7%
3.79
US$33,943 		8,956 -1.7% 3.79 US$33,943
2022-07-07 2022-07-05 PlS Planned sale
PRASAD SUYASH

CMO and Head of R&D

Officer
3,905 -0.7%
3.51
US$13,707 		3,905 -0.7% 3.51 US$13,707
2022-07-01 2022-07-01 PlS Planned sale
PRASAD SUYASH

CMO and Head of R&D

Officer
23,923 -4.2%
3.53
US$84,448 		23,923 -4.2% 3.53 US$84,448
2022-07-01 2022-06-30 PlS Planned sale
PRASAD SUYASH

CMO and Head of R&D

Officer
13,892 -2.4%
3.72
US$51,678 		13,892 -2.4% 3.72 US$51,678
2022-07-01 2022-06-29 PlS Planned sale
PRASAD SUYASH

CMO and Head of R&D

Officer
12,324 -2.1%
3.81
US$46,954 		12,324 -2.1% 3.81 US$46,954
2022-02-04 2022-02-03 B Purchase
4.0
Manning Paul B
Non-Executive Director Large shareholder
26,602 +1.3%
7.84
US$208,560 		26,602 +1.3% 7.84 US$208,560
2022-02-04 2022-02-03 B Purchase
4.0
Manning Paul B
Non-Executive Director Large shareholder
50,000 +54.2%
7.84
US$392,000 		50,000 +54.2% 7.84 US$392,000
2022-02-04 2022-02-02 B Purchase
4.0
Manning Paul B
Non-Executive Director Large shareholder
22,000 +inf%
7.77
US$170,940 		22,000 +inf% 7.77 US$170,940
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