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United States Pharmaceuticals

Bolt Biotherapeutics Inc (BOLT)

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The most recent insider trading activity occurred on December 5, 2025, with two planned purchases by executives William P. Quinn and Sarah Nemec, each acquiring 125 shares. Prior to this, significant selling activity was noted in November 2023 by Edgar Engleman and Vivo Capital VIII, LLC.
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Ticker: BOLT Exchange: NSM
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Nemec Sarah
Senior VP, Finance and PAO
1 purchase — total 576 USD
Planned buy 5 Dec 2025
Value US$1,999,649.45 | Price 103.72 | Shares 39,820
Planned buy 5 Dec 2025
Value US$3,577,752.92 | Price 409.53 | Shares 25,689
Planned buy 6 Jun 2025
Value US$686.50 | Price 5.49 | Shares 125
Planned buy 6 Jun 2025
Value US$686.50 | Price 5.49 | Shares 125
Planned buy 16 Dec 2024
Value US$1,241.25 | Price 0.50 | Shares 2,500
Planned buy 16 Dec 2024
Value US$1,241.25 | Price 0.50 | Shares 2,500
Planned buy 6 Jun 2024
Value US$1,593.50 | Price 0.64 | Shares 2,500
Planned buy 6 Jun 2024
Value US$1,593.50 | Price 0.64 | Shares 2,500
Buy 12 Dec 2023
Value US$7,125.00 | Price 0.95 | Shares 7,500
Planned buy 6 Dec 2023
Value US$1,955.00 | Price 0.78 | Shares 2,500
Sale 30 Nov 2023
Value US$12,814.87 | Price 0.86 | Shares 14,934
Sale 30 Nov 2023
Value US$92,799.22 | Price 0.86 | Shares 108,145
Sale 29 Nov 2023
Value US$2,836.69 | Price 0.91 | Shares 3,131
Sale 29 Nov 2023
Value US$20,542.64 | Price 0.91 | Shares 22,674
Sale 21 Nov 2023
Value US$1,311.30 | Price 0.90 | Shares 1,457
Sale 21 Nov 2023
Value US$212.40 | Price 0.90 | Shares 236
Sale 21 Nov 2023
Value US$1,536.30 | Price 0.90 | Shares 1,707
Sale 21 Nov 2023
Value US$212.73 | Price 0.90 | Shares 236
Sale 21 Nov 2023
Value US$1,538.69 | Price 0.90 | Shares 1,707
Sale 20 Nov 2023
Value US$3,488.64 | Price 0.92 | Shares 3,792
Sale 20 Nov 2023
Value US$25,267.80 | Price 0.92 | Shares 27,465
Sale 20 Nov 2023
Value US$21,567.56 | Price 0.92 | Shares 23,443
Sale 20 Nov 2023
Value US$3,488.64 | Price 0.92 | Shares 3,792
Sale 20 Nov 2023
Value US$25,267.80 | Price 0.92 | Shares 27,465
Sale 17 Nov 2023
Value US$1,054.62 | Price 0.93 | Shares 1,134
Sale 17 Nov 2023
Value US$7,636.23 | Price 0.93 | Shares 8,211
Sale 17 Nov 2023
Value US$6,518.37 | Price 0.93 | Shares 7,009
Sale 17 Nov 2023
Value US$1,054.62 | Price 0.93 | Shares 1,134
Sale 17 Nov 2023
Value US$7,636.23 | Price 0.93 | Shares 8,211
Sale 16 Nov 2023
Value US$998.40 | Price 0.96 | Shares 1,040
Sale 16 Nov 2023
Value US$7,229.76 | Price 0.96 | Shares 7,531
Sale 16 Nov 2023
Value US$6,171.84 | Price 0.96 | Shares 6,429
Sale 16 Nov 2023
Value US$998.40 | Price 0.96 | Shares 1,040
Sale 16 Nov 2023
Value US$7,229.76 | Price 0.96 | Shares 7,531
Planned buy 6 Jun 2023
Value US$2,160.96 | Price 1.18 | Shares 1,829
Sale 13 Jul 2022
Value US$1,600,000.00 | Price 2.00 | Shares 800,000
Buy 8 Dec 2021
Value US$23,575.00 | Price 4.72 | Shares 5,000
Planned buy 6 Dec 2021
Value US$1,907.04 | Price 4.64 | Shares 411
Planned buy 6 Dec 2021
Value US$162.40 | Price 4.64 | Shares 35
Planned buy 4 Jun 2021
Value US$15,268.05 | Price 16.65 | Shares 917
Planned buy 4 Jun 2021
Value US$20,329.65 | Price 16.65 | Shares 1,221
Buy 9 Feb 2021
Value US$8,000,000.00 | Price 20.00 | Shares 400,000
Buy 9 Feb 2021
Value US$485,340.00 | Price 20.00 | Shares 24,267
Sale 9 Feb 2021
Value US$400.00 | Price 20.00 | Shares 20
Buy 9 Feb 2021
Value US$3,514,660.00 | Price 20.00 | Shares 175,733
Sale 9 Feb 2021
Value US$2,880.00 | Price 20.00 | Shares 144
Buy 9 Feb 2021
Value US$24,000.00 | Price 20.00 | Shares 1,200
Buy 9 Feb 2021
Value US$20,000.00 | Price 20.00 | Shares 1,000
Buy 9 Feb 2021
Value US$3,000,000.00 | Price 20.00 | Shares 150,000
Buy 9 Feb 2021
Value US$485,340.00 | Price 20.00 | Shares 24,267
Sale 9 Feb 2021
Value US$400.00 | Price 20.00 | Shares 20
Buy 9 Feb 2021
Value US$3,514,660.00 | Price 20.00 | Shares 175,733
Sale 9 Feb 2021
Value US$2,880.00 | Price 20.00 | Shares 144
Sale 9 Feb 2021
Value US$1,240.00 | Price 20.00 | Shares 62
Buy 9 Feb 2021
Value US$9,000,000.00 | Price 20.00 | Shares 450,000
Sale 9 Feb 2021
Value US$1,240.00 | Price 20.00 | Shares 62
Buy 9 Feb 2021
Value US$9,000,000.00 | Price 20.00 | Shares 450,000
Buy 9 Feb 2021
Value US$24,000.00 | Price 20.00 | Shares 1,200
Buy 9 Feb 2021
Value US$24,000.00 | Price 20.00 | Shares 1,200
Buy 9 Feb 2021
Value US$30,000.00 | Price 20.00 | Shares 1,500
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
2026-02-04 2025-12-05 PP Planned purchase
Nemec Sarah

Senior VP, Finance and PAO

Officer
39,820 -19.6%
103.72
US$1,999,649 		39,820 -19.6% 103.72 US$1,999,649
2026-02-04 2025-12-05 PP Planned purchase
1.5
Quinn William P.

President, CEO and CFO

Executive Director
25,689 -22.4%
409.53
US$3,577,753 		25,689 -22.4% 409.53 US$3,577,753
2025-10-24 2025-06-06 PP Planned purchase
1.5
Quinn William P.

President, CEO and CFO

Executive Director
3,307 +47.4%
414.74
US$1,674,321 		3,307 +47.4% 414.74 US$1,674,321
2025-10-24 2025-06-06 PP Planned purchase
Nemec Sarah

Senior VP, Finance and PAO

Officer
125 +15.3%
5.49
US$686 		125 +15.3% 5.49 US$686
2025-05-05 2024-12-16 PP Planned purchase
Nemec Sarah

Senior VP, Finance and PAO

Officer
2,500 +17.7%
0.50
US$1,241 		2,500 +17.7% 0.50 US$1,241
2025-05-05 2024-12-16 PP Planned purchase
1.5
Quinn William P.

President, CEO and CFO

Executive Director
2,500 +6.4%
0.50
US$1,241 		2,500 +6.4% 0.50 US$1,241
2025-05-05 2024-06-06 PP Planned purchase
Nemec Sarah

Senior VP, Finance and PAO

Officer
2,500 +22.0%
0.64
US$1,594 		2,500 +22.0% 0.64 US$1,594
2025-05-05 2024-06-06 PP Planned purchase
1.5
Quinn William P.

President, CEO and CFO

Executive Director
2,500 +6.9%
0.64
US$1,594 		2,500 +6.9% 0.64 US$1,594
2023-12-13 2023-12-12 B Purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
7,500 +26.1%
0.95
US$7,125 		7,500 +26.1% 0.95 US$7,125
2023-12-13 2023-12-06 PP Planned purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
2,500 +9.5%
0.78
US$1,955 		2,500 +9.5% 0.78 US$1,955
2023-12-01 2023-11-30 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
14,934 -5.6%
0.86
US$12,815 		14,934 -5.6% 0.86 US$12,815
2023-12-01 2023-11-30 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
108,145 -5.6%
0.86
US$92,799 		108,145 -5.6% 0.86 US$92,799
2023-12-01 2023-11-29 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
3,131 -1.2%
0.91
US$2,837 		3,131 -1.2% 0.91 US$2,837
2023-12-01 2023-11-29 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
22,674 -1.2%
0.91
US$20,543 		22,674 -1.2% 0.91 US$20,543
2023-11-22 2023-11-21 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
1,457 -1.3%
0.90
US$1,311 		1,457 -1.3% 0.90 US$1,311
2023-11-22 2023-11-21 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
236 -0.1%
0.90
US$212 		236 -0.1% 0.90 US$212
2023-11-22 2023-11-21 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
1,707 -0.1%
0.90
US$1,536 		1,707 -0.1% 0.90 US$1,536
2023-11-22 2023-11-21 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
236 -0.1%
0.90
US$213 		236 -0.1% 0.90 US$213
2023-11-22 2023-11-21 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
1,707 -0.1%
0.90
US$1,539 		1,707 -0.1% 0.90 US$1,539
2023-11-20 2023-11-20 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
3,792 -1.4%
0.92
US$3,489 		3,792 -1.4% 0.92 US$3,489
2023-11-20 2023-11-20 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
27,465 -1.4%
0.92
US$25,268 		27,465 -1.4% 0.92 US$25,268
2023-11-20 2023-11-20 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
23,443 -17.2%
0.92
US$21,568 		23,443 -17.2% 0.92 US$21,568
2023-11-20 2023-11-20 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
3,792 -1.4%
0.92
US$3,489 		3,792 -1.4% 0.92 US$3,489
2023-11-20 2023-11-20 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
27,465 -1.4%
0.92
US$25,268 		27,465 -1.4% 0.92 US$25,268
2023-11-20 2023-11-17 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
1,134 -0.4%
0.93
US$1,055 		1,134 -0.4% 0.93 US$1,055
2023-11-20 2023-11-17 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
8,211 -0.4%
0.93
US$7,636 		8,211 -0.4% 0.93 US$7,636
2023-11-20 2023-11-17 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
7,009 -4.9%
0.93
US$6,518 		7,009 -4.9% 0.93 US$6,518
2023-11-20 2023-11-17 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
1,134 -0.4%
0.93
US$1,055 		1,134 -0.4% 0.93 US$1,055
2023-11-20 2023-11-17 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
8,211 -0.4%
0.93
US$7,636 		8,211 -0.4% 0.93 US$7,636
2023-11-20 2023-11-16 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
1,040 -0.4%
0.96
US$998 		1,040 -0.4% 0.96 US$998
2023-11-20 2023-11-16 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director
7,531 -0.4%
0.96
US$7,230 		7,531 -0.4% 0.96 US$7,230
2023-11-20 2023-11-16 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
6,429 -4.3%
0.96
US$6,172 		6,429 -4.3% 0.96 US$6,172
2023-11-20 2023-11-16 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
1,040 -0.4%
0.96
US$998 		1,040 -0.4% 0.96 US$998
2023-11-20 2023-11-16 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
7,531 -0.4%
0.96
US$7,230 		7,531 -0.4% 0.96 US$7,230
2023-12-13 2023-06-06 PP Planned purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
1,829 +7.5%
1.18
US$2,161 		1,829 +7.5% 1.18 US$2,161
2022-07-15 2022-07-13 S Sale
2.3
Novo Holdings A/S
Large shareholder
800,000 -17.8%
2.00
US$1,600,000 		800,000 -17.8% 2.00 US$1,600,000
2021-12-09 2021-12-08 B Purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
5,000 +33.0%
4.72
US$23,575 		5,000 +33.0% 4.72 US$23,575
2022-02-01 2021-12-06 PP Planned purchase
Perez Edith A.

Chief Medical Officer

Officer
411 +44.8%
4.64
US$1,907 		411 +44.8% 4.64 US$1,907
2021-12-09 2021-12-06 PP Planned purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
35 +0.2%
4.64
US$162 		35 +0.2% 4.64 US$162
2022-02-01 2021-06-04 PP Planned purchase
Perez Edith A.

Chief Medical Officer

Officer
917 +inf%
16.65
US$15,268 		917 +inf% 16.65 US$15,268
2021-12-09 2021-06-04 PP Planned purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
1,221 +8.8%
16.65
US$20,330 		1,221 +8.8% 16.65 US$20,330
2021-02-11 2021-02-09 B Purchase
2.3
Novo Holdings A/S
Large shareholder
400,000 +9.7%
20.00
US$8,000,000 		400,000 +9.7% 20.00 US$8,000,000
2021-02-09 2021-02-09 B Purchase
0.9
ENGLEMAN EDGAR
Non-Executive Director Large shareholder
24,267 +9.6%
20.00
US$485,340 		24,267 +9.6% 20.00 US$485,340
2021-02-09 2021-02-09 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director Large shareholder
20 -0.0%
20.00
US$400 		20 -0.0% 20.00 US$400
2021-02-09 2021-02-09 B Purchase
0.9
ENGLEMAN EDGAR
Non-Executive Director Large shareholder
175,733 +9.6%
20.00
US$3,514,660 		175,733 +9.6% 20.00 US$3,514,660
2021-02-09 2021-02-09 S Sale
0.9
ENGLEMAN EDGAR
Non-Executive Director Large shareholder
144 -0.0%
20.00
US$2,880 		144 -0.0% 20.00 US$2,880
2021-02-09 2021-02-09 B Purchase
Khanna Ashish Siri Ram
Non-Executive Director
1,200 +inf%
20.00
US$24,000 		1,200 +inf% 20.00 US$24,000
2021-02-09 2021-02-09 B Purchase
2.4
Vivo Capital VIII, LLC
Large shareholder
150,000 +inf%
20.00
US$3,000,000 		150,000 +inf% 20.00 US$3,000,000
2021-02-09 2021-02-09 B Purchase
2.4
Vivo Capital VIII, LLC
Large shareholder
24,267 +9.6%
20.00
US$485,340 		24,267 +9.6% 20.00 US$485,340
2021-02-09 2021-02-09 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
20 -0.0%
20.00
US$400 		20 -0.0% 20.00 US$400
2021-02-09 2021-02-09 B Purchase
2.4
Vivo Capital VIII, LLC
Large shareholder
175,733 +9.6%
20.00
US$3,514,660 		175,733 +9.6% 20.00 US$3,514,660
2021-02-09 2021-02-09 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
144 -0.0%
20.00
US$2,880 		144 -0.0% 20.00 US$2,880
2021-02-09 2021-02-09 S Sale
2.4
Vivo Capital VIII, LLC
Large shareholder
62 -0.0%
20.00
US$1,240 		62 -0.0% 20.00 US$1,240
2021-02-09 2021-02-09 B Purchase
2.9
HEALY JAMES
Non-Executive Director
450,000 +19.5%
20.00
US$9,000,000 		450,000 +19.5% 20.00 US$9,000,000
2021-02-09 2021-02-09 S Sale
SHAH MAHENDRA
Non-Executive Director
62 -0.0%
20.00
US$1,240 		62 -0.0% 20.00 US$1,240
2021-02-09 2021-02-09 B Purchase
2.5
Sofinnova Venture Partners X, L.P.
Large shareholder
450,000 +19.5%
20.00
US$9,000,000 		450,000 +19.5% 20.00 US$9,000,000
2021-02-09 2021-02-09 B Purchase
3.4
LAPORTE KATHLEEN
Non-Executive Director
1,200 +inf%
20.00
US$24,000 		1,200 +inf% 20.00 US$24,000
2021-02-09 2021-02-09 B Purchase
1.5
Quinn William P.

Chief Financial Officer

Officer
1,200 +9.5%
20.00
US$24,000 		1,200 +9.5% 20.00 US$24,000
2021-02-09 2021-02-09 B Purchase
Schatzman Randall C

Chief Executive Officer

Executive Director
1,500 +inf%
20.00
US$30,000 		1,500 +inf% 20.00 US$30,000
2021-02-09 2021-02-09 B Purchase
Khanna Ashish Siri Ram
Non-Executive Director
1,000 +inf%
20.00
US$20,000 		1,000 +inf% 20.00 US$20,000
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