United States Pharmaceuticals

Bolt Biotherapeutics Inc (BOLT)

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The most recent insider trading activity at Bolt Biotherapeutics Inc. occurred on December 5, 2025, involving planned purchases by CEO William P. Quinn and Senior VP Sarah Nemec. These transactions follow a consistent pattern of periodic, planned acquisitions by company executives. No insider trading activity has been reported within the last three months.
Ticker: BOLT Exchange: NSM
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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 Bolt Biotherapeutics Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Planned buy 5 Dec 2025
Value US$1,999,649.45 | Price 103.72 | Shares 39,820 (-19.6%)
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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
3.7
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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