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United States Biotechnology & Medical Research

Adverum Biotechnologies Inc (ADVM)

Track

Recent insider activity includes significant selling by Leonard Braden Michael in early December 2025, totaling over $4.4 million. This contrasts with planned purchases by CEO Laurent Fischer and COO Peter Soparkar around the same period. Earlier in 2025, Leonard Braden Michael also made several notable purchases.
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Ticker: ADVM Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Activity signal Earnings
Top insiders
Trades
Fischer Laurent
CEO, PRESIDENT AND DIRECTOR
1 purchase — total 506,916 USD
Planned buy 8 Dec 2025
Value US$4,410,062.35 | Price 359.40 | Shares 18,683
Planned buy 5 Dec 2025
Value US$4,016,036.79 | Price 208.43 | Shares 97,700
Planned buy 5 Dec 2025
Value US$47,000.40 | Price 4.24 | Shares 11,085
Sale 4 Dec 2025
Value US$2,200,371.83 | Price 4.19 | Shares 524,560
Sale 3 Dec 2025
Value US$929,597.25 | Price 4.17 | Shares 222,925
Sale 2 Dec 2025
Value US$218,236.20 | Price 4.20 | Shares 51,961
Sale 1 Dec 2025
Value US$1,260,000.00 | Price 4.20 | Shares 300,000
Sale 15 May 2025
Value US$1,848.00 | Price 2.00 | Shares 924
Sale 15 May 2025
Value US$18,252.00 | Price 2.00 | Shares 9,126
Sale 15 May 2025
Value US$5,920.00 | Price 2.00 | Shares 2,960
Buy 23 Apr 2025
Value US$148,950.00 | Price 2.98 | Shares 50,000
Buy 22 Apr 2025
Value US$900,000.00 | Price 3.00 | Shares 300,000
Buy 2 Apr 2025
Value US$61,407.86 | Price 4.04 | Shares 15,209
Buy 31 Mar 2025
Value US$85,667.77 | Price 4.38 | Shares 19,566
Buy 27 Mar 2025
Value US$86,089.46 | Price 5.19 | Shares 16,593
Buy 26 Mar 2025
Value US$102,841.08 | Price 5.04 | Shares 20,407
Buy 26 Mar 2025
Value US$102,841.08 | Price 5.04 | Shares 20,407
Buy 20 Mar 2025
Value US$171,766.98 | Price 5.61 | Shares 30,600
Buy 19 Mar 2025
Value US$123,390.00 | Price 4.94 | Shares 25,000
Buy 18 Mar 2025
Value US$209,617.64 | Price 4.73 | Shares 44,341
Buy 18 Mar 2025
Value US$82,800.00 | Price 4.60 | Shares 18,000
Buy 28 Feb 2025
Value US$391,015.06 | Price 4.60 | Shares 85,068
Buy 27 Feb 2025
Value US$387,093.52 | Price 4.46 | Shares 86,802
Buy 26 Feb 2025
Value US$660,978.51 | Price 4.01 | Shares 164,886
Buy 30 Jul 2024
Value US$613,470.00 | Price 7.15 | Shares 85,800
Buy 18 Jul 2024
Value US$735,736.50 | Price 9.11 | Shares 80,718
Buy 17 Jul 2024
Value US$1,049,925.76 | Price 7.75 | Shares 135,546
Buy 7 Feb 2024
Value US$135,000.00 | Price 1.35 | Shares 100,000
Buy 7 Feb 2024
Value US$175,500.00 | Price 1.35 | Shares 130,000
Sale 15 Sep 2023
Value US$201.32 | Price 1.55 | Shares 130
Planned sale 15 Sep 2023
Value US$9,227.92 | Price 1.52 | Shares 6,071
Buy 7 Jun 2023
Value US$145,490.00 | Price 1.45 | Shares 100,000
Planned sale 15 Mar 2023
Value US$10,442.18 | Price 0.78 | Shares 13,360
Planned sale 15 Mar 2023
Value US$32,232.40 | Price 0.78 | Shares 41,239
Planned sale 15 Mar 2023
Value US$5,704.90 | Price 0.78 | Shares 7,299
Planned sale 19 Sep 2022
Value US$43,941.31 | Price 1.07 | Shares 41,082
Planned sale 19 Sep 2022
Value US$14,232.36 | Price 1.07 | Shares 13,305
Planned sale 19 Sep 2022
Value US$7,772.44 | Price 1.07 | Shares 7,266
Sale 19 Sep 2022
Value US$6,479.64 | Price 1.07 | Shares 6,058
Sale 19 Sep 2022
Value US$4,569.76 | Price 1.07 | Shares 4,272
Buy 23 May 2022
Value US$16,800.00 | Price 0.84 | Shares 20,000
Buy 17 May 2022
Value US$8,228.00 | Price 0.82 | Shares 10,000
Buy 17 May 2022
Value US$8,272.00 | Price 0.83 | Shares 10,000
Buy 16 May 2022
Value US$25,578.00 | Price 0.85 | Shares 30,000
Buy 13 May 2022
Value US$8,585.00 | Price 0.86 | Shares 10,000
Buy 20 Apr 2022
Value US$27,800.00 | Price 1.11 | Shares 25,000
Buy 19 Apr 2022
Value US$24,795.00 | Price 1.14 | Shares 21,750
Buy 19 Apr 2022
Value US$199.03 | Price 1.14 | Shares 175
Buy 9 Dec 2021
Value US$26,497.55 | Price 1.85 | Shares 14,323
Planned buy 8 Dec 2021
Value US$19,111.83 | Price 1.79 | Shares 10,677
Planned buy 8 Dec 2021
Value US$47,750.00 | Price 1.91 | Shares 25,000
Sale 15 Nov 2021
Value US$109,000.00 | Price 2.18 | Shares 50,000
Sale 30 Sep 2021
Value US$10,342.22 | Price 2.17 | Shares 4,766
Buy 31 Mar 2021
Value US$200,338.00 | Price 10.02 | Shares 20,000
Buy 24 Mar 2021
Value US$99,196.00 | Price 9.92 | Shares 10,000
Buy 24 Mar 2021
Value US$98,780.00 | Price 9.88 | Shares 10,000
Sale 9 Feb 2021
Value US$876.64 | Price 14.14 | Shares 62
Sale 9 Feb 2021
Value US$175,841.10 | Price 14.10 | Shares 12,471
Buy 15 Jan 2021
Value US$115,174.00 | Price 11.52 | Shares 10,000
Buy 15 Jan 2021
Value US$99,190.68 | Price 11.53 | Shares 8,600
Planned buy 17 Aug 2020
Value US$99,996.00 | Price 13.00 | Shares 7,692
Buy 17 Aug 2020
Value US$99,996.00 | Price 13.00 | Shares 7,692
Planned sale 20 Jul 2020
Value US$87,978.00 | Price 17.60 | Shares 5,000
Planned sale 22 Jun 2020
Value US$591,616.84 | Price 25.06 | Shares 23,605
Planned sale 18 Jun 2020
Value US$278,328.55 | Price 25.01 | Shares 11,127
Planned sale 17 Jun 2020
Value US$6,702.71 | Price 25.01 | Shares 268
Sale 16 Jun 2020
Value US$325,060.28 | Price 24.68 | Shares 13,171
Planned sale 15 Jun 2020
Value US$3,751.18 | Price 23.59 | Shares 159
Planned sale 15 Jun 2020
Value US$78,786.64 | Price 23.00 | Shares 3,425
Planned sale 15 Jun 2020
Value US$31,047.07 | Price 21.93 | Shares 1,416
Planned sale 15 Jun 2020
Value US$105,042.00 | Price 21.01 | Shares 5,000
Planned sale 20 May 2020
Value US$28,029.95 | Price 20.01 | Shares 1,401
Planned sale 18 May 2020
Value US$5,709.00 | Price 19.03 | Shares 300
Planned sale 18 May 2020
Value US$85,124.05 | Price 18.11 | Shares 4,700
Planned sale 6 May 2020
Value US$500,667.50 | Price 20.03 | Shares 25,000
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
2025-12-08 2025-12-08 PP Planned purchase
1.5
Fischer Laurent

CEO, PRESIDENT AND DIRECTOR

Executive Director
18,683 +21.4%
359.40
US$4,410,062 		18,683 +21.4% 359.40 US$4,410,062
2025-12-08 2025-12-05 PP Planned purchase
1.6
Soparkar Peter

CHIEF OPERATING OFFICER

Officer
97,700 -32.4%
208.43
US$4,016,037 		97,700 -32.4% 208.43 US$4,016,037
2025-12-08 2025-12-05 PP Planned purchase
1.5
Fischer Laurent

CEO, PRESIDENT AND DIRECTOR

Executive Director
66,731 +15.9%
103.51
US$1,732,609 		66,731 +15.9% 103.51 US$1,732,609
2025-12-05 2025-12-04 S Sale
2.9
Leonard Braden Michael
Large shareholder
524,560 -21.1%
4.19
US$2,200,372 		524,560 -21.1% 4.19 US$2,200,372
2025-12-03 2025-12-03 S Sale
2.9
Leonard Braden Michael
Large shareholder
222,925 -8.4%
4.17
US$929,597 		222,925 -8.4% 4.17 US$929,597
2025-12-03 2025-12-02 S Sale
2.9
Leonard Braden Michael
Large shareholder
51,961 -1.9%
4.20
US$218,236 		51,961 -1.9% 4.20 US$218,236
2025-12-03 2025-12-01 S Sale
2.9
Leonard Braden Michael
Large shareholder
300,000 -9.8%
4.20
US$1,260,000 		300,000 -9.8% 4.20 US$1,260,000
2025-05-16 2025-05-15 S Sale
2.9
Seyedkazemi Setareh

CHIEF DEVELOPMENT OFFICER

Officer
924 -6.3%
2.00
US$1,848 		924 -6.3% 2.00 US$1,848
2025-05-16 2025-05-15 S Sale
1.5
Fischer Laurent

CEO, PRESIDENT AND DIRECTOR

Executive Director
9,126 -9.4%
2.00
US$18,252 		9,126 -9.4% 2.00 US$18,252
2025-05-16 2025-05-15 S Sale
1.6
Soparkar Peter

CHIEF OPERATING OFFICER

Officer
2,960 -7.0%
2.00
US$5,920 		2,960 -7.0% 2.00 US$5,920
2025-04-24 2025-04-23 B Purchase
2.9
Leonard Braden Michael
Large shareholder
50,000 +35.3%
2.98
US$148,950 		50,000 +35.3% 2.98 US$148,950
2025-04-24 2025-04-22 B Purchase
2.9
Leonard Braden Michael
Large shareholder
300,000 +10.9%
3.00
US$900,000 		300,000 +10.9% 3.00 US$900,000
2025-04-02 2025-04-02 B Purchase
2.9
Leonard Braden Michael
Large shareholder
15,209 +0.6%
4.04
US$61,408 		15,209 +0.6% 4.04 US$61,408
2025-04-02 2025-03-31 B Purchase
2.9
Leonard Braden Michael
Large shareholder
19,566 +0.7%
4.38
US$85,668 		19,566 +0.7% 4.38 US$85,668
2025-04-28 2025-03-27 B Purchase
2.9
Leonard Braden Michael
Large shareholder
16,593 +13.3%
5.19
US$86,089 		16,593 +13.3% 5.19 US$86,089
2025-04-28 2025-03-26 B Purchase
2.9
Leonard Braden Michael
Large shareholder
20,407 +19.5%
5.04
US$102,841 		20,407 +19.5% 5.04 US$102,841
2025-03-27 2025-03-26 B Purchase
2.9
Leonard Braden Michael
Large shareholder
20,407 +19.5%
5.04
US$102,841 		20,407 +19.5% 5.04 US$102,841
2025-03-20 2025-03-20 B Purchase
2.9
Leonard Braden Michael
Large shareholder
30,600 +1.1%
5.61
US$171,767 		30,600 +1.1% 5.61 US$171,767
2025-03-20 2025-03-19 B Purchase
2.9
Leonard Braden Michael
Large shareholder
25,000 +0.9%
4.94
US$123,390 		25,000 +0.9% 4.94 US$123,390
2025-03-20 2025-03-18 B Purchase
2.9
Leonard Braden Michael
Large shareholder
44,341 +1.7%
4.73
US$209,618 		44,341 +1.7% 4.73 US$209,618
2025-03-20 2025-03-18 B Purchase
2.9
Leonard Braden Michael
Large shareholder
18,000 +0.7%
4.60
US$82,800 		18,000 +0.7% 4.60 US$82,800
2025-02-28 2025-02-28 B Purchase
2.9
Leonard Braden Michael
Large shareholder
85,068 +3.4%
4.60
US$391,015 		85,068 +3.4% 4.60 US$391,015
2025-02-28 2025-02-27 B Purchase
2.9
Leonard Braden Michael
Large shareholder
86,802 +3.6%
4.46
US$387,094 		86,802 +3.6% 4.46 US$387,094
2025-02-28 2025-02-26 B Purchase
2.9
Leonard Braden Michael
Large shareholder
164,886 +7.3%
4.01
US$660,979 		164,886 +7.3% 4.01 US$660,979
2024-07-31 2024-07-30 B Purchase
2.9
Leonard Braden Michael
Large shareholder
85,800 +3.9%
7.15
US$613,470 		85,800 +3.9% 7.15 US$613,470
2024-07-18 2024-07-18 B Purchase
2.9
Leonard Braden Michael
Large shareholder
80,718 +3.8%
9.11
US$735,736 		80,718 +3.8% 9.11 US$735,736
2024-07-18 2024-07-17 B Purchase
2.9
Leonard Braden Michael
Large shareholder
135,546 +6.9%
7.75
US$1,049,926 		135,546 +6.9% 7.75 US$1,049,926
2024-02-09 2024-02-07 B Purchase
1.8
Scopa James Paul
Non-Executive Director
100,000 +inf%
1.35
US$135,000 		100,000 +inf% 1.35 US$135,000
2024-02-09 2024-02-07 B Purchase
Lupher, Jr. Mark L.
Non-Executive Director
130,000 +inf%
1.35
US$175,500 		130,000 +inf% 1.35 US$175,500
2023-09-18 2023-09-15 S Sale
2.9
Seyedkazemi Setareh

Chief Development Officer

Officer
130 -0.3%
1.55
US$201 		130 -0.3% 1.55 US$201
2023-09-18 2023-09-15 PlS Planned sale
2.9
Seyedkazemi Setareh

Chief Development Officer

Officer
6,071 -11.3%
1.52
US$9,228 		6,071 -11.3% 1.52 US$9,228
2023-06-09 2023-06-07 B Purchase
2.4
Rubinstein Linda M

Chief Financial Officer

Officer
100,000 +inf%
1.45
US$145,490 		100,000 +inf% 1.45 US$145,490
2023-03-17 2023-03-15 PlS Planned sale
1.6
Soparkar Peter

Chief Operating Officer

Officer
13,360 -4.8%
0.78
US$10,442 		13,360 -4.8% 0.78 US$10,442
2023-03-17 2023-03-15 PlS Planned sale
1.5
Fischer Laurent

CEO, President and Director

Executive Director
41,239 -5.6%
0.78
US$32,232 		41,239 -5.6% 0.78 US$32,232
2023-03-17 2023-03-15 PlS Planned sale
Riley Brigit

Chief Scientific Officer

Officer
7,299 -5.9%
0.78
US$5,705 		7,299 -5.9% 0.78 US$5,705
2022-09-21 2022-09-19 PlS Planned sale
1.5
Fischer Laurent

CEO, President and Director

Executive Director
41,082 -5.3%
1.07
US$43,941 		41,082 -5.3% 1.07 US$43,941
2022-09-21 2022-09-19 PlS Planned sale
1.6
Soparkar Peter

See Remarks section

Officer
13,305 -4.6%
1.07
US$14,232 		13,305 -4.6% 1.07 US$14,232
2022-09-21 2022-09-19 PlS Planned sale
Riley Brigit

Chief Scientific Officer

Officer
7,266 -5.8%
1.07
US$7,772 		7,266 -5.8% 1.07 US$7,772
2022-09-21 2022-09-19 S Sale
2.9
Seyedkazemi Setareh

Chief Development Officer

Officer
6,058 -11.2%
1.07
US$6,480 		6,058 -11.2% 1.07 US$6,480
2022-09-21 2022-09-19 S Sale
3.1
Beckman Richard

Chief Medical Officer

Officer
4,272 -9.9%
1.07
US$4,570 		4,272 -9.9% 1.07 US$4,570
2022-05-24 2022-05-23 B Purchase
2.9
Seyedkazemi Setareh

Chief Development Officer

Officer
20,000 +3333.3%
0.84
US$16,800 		20,000 +3333.3% 0.84 US$16,800
2022-05-19 2022-05-17 B Purchase
3.1
Beckman Richard

Chief Medical Officer

Officer
10,000 +inf%
0.82
US$8,228 		10,000 +inf% 0.82 US$8,228
2022-05-17 2022-05-17 B Purchase
3.6
D'Souza Rupert

Chief Financial Officer

Officer
10,000 +92.2%
0.83
US$8,272 		10,000 +92.2% 0.83 US$8,272
2022-05-18 2022-05-16 B Purchase
3.0
Svoronos Dawn
Non-Executive Director
30,000 +150.0%
0.85
US$25,578 		30,000 +150.0% 0.85 US$25,578
2022-05-17 2022-05-13 B Purchase
3.6
D'Souza Rupert

Chief Financial Officer

Officer
10,000 +1176.5%
0.86
US$8,585 		10,000 +1176.5% 0.86 US$8,585
2022-04-22 2022-04-20 B Purchase
1.5
Fischer Laurent

CEO, President and Director

Executive Director
25,000 +3.4%
1.11
US$27,800 		25,000 +3.4% 1.11 US$27,800
2022-04-20 2022-04-19 B Purchase
1.6
Soparkar Peter

See Remarks section

Officer
21,750 +8.4%
1.14
US$24,795 		21,750 +8.4% 1.14 US$24,795
2022-04-20 2022-04-19 B Purchase
1.6
Soparkar Peter

See Remarks section

Officer
175 +0.1%
1.14
US$199 		175 +0.1% 1.14 US$199
2021-12-10 2021-12-09 B Purchase
1.5
Fischer Laurent

CEO, President and Director

Executive Director
14,323 +2.0%
1.85
US$26,498 		14,323 +2.0% 1.85 US$26,498
2021-12-10 2021-12-08 PP Planned purchase
1.5
Fischer Laurent

CEO, President and Director

Executive Director
10,677 +1.5%
1.79
US$19,112 		10,677 +1.5% 1.79 US$19,112
2021-12-10 2021-12-08 PP Planned purchase
1.6
Soparkar Peter

See Remarks section

Officer
25,000 +10.7%
1.91
US$47,750 		25,000 +10.7% 1.91 US$47,750
2021-11-17 2021-11-15 S Sale
1.8
Scopa James Paul
Non-Executive Director
50,000 -93.7%
2.18
US$109,000 		50,000 -93.7% 2.18 US$109,000
2021-10-04 2021-09-30 S Sale
2.4
Clark Julie

Chief Medical Officer

Officer
4,766 -2.8%
2.17
US$10,342 		4,766 -2.8% 2.17 US$10,342
2021-04-01 2021-03-31 B Purchase
3.0
Svoronos Dawn
Non-Executive Director
20,000 +inf%
10.02
US$200,338 		20,000 +inf% 10.02 US$200,338
2021-03-24 2021-03-24 B Purchase
1.5
Machado Patrick
Non-Executive Director
10,000 +12.8%
9.92
US$99,196 		10,000 +12.8% 9.92 US$99,196
2021-03-24 2021-03-24 B Purchase
1.5
Fischer Laurent

CEO and Director

Executive Director
10,000 +61.4%
9.88
US$98,780 		10,000 +61.4% 9.88 US$98,780
2021-02-11 2021-02-09 S Sale
3.8
PATTERSON LEONE D

President and CFO

Officer
62 -0.1%
14.14
US$877 		62 -0.1% 14.14 US$877
2021-02-11 2021-02-09 S Sale
3.8
PATTERSON LEONE D

President and CFO

Officer
12,471 -11.3%
14.10
US$175,841 		12,471 -11.3% 14.10 US$175,841
2021-01-19 2021-01-15 B Purchase
1.5
Machado Patrick
Non-Executive Director
10,000 +14.7%
11.52
US$115,174 		10,000 +14.7% 11.52 US$115,174
2021-01-19 2021-01-15 B Purchase
1.5
Fischer Laurent

CEO and Director

Executive Director
8,600 +111.8%
11.53
US$99,191 		8,600 +111.8% 11.53 US$99,191
2020-08-19 2020-08-17 PP Planned purchase
1.6
Soparkar Peter

Chief Legal Officer

Officer
7,692 +256.4%
13.00
US$99,996 		7,692 +256.4% 13.00 US$99,996
2020-08-19 2020-08-17 B Purchase
1.5
Fischer Laurent

CEO and Director

Executive Director
7,692 +inf%
13.00
US$99,996 		7,692 +inf% 13.00 US$99,996
2020-07-22 2020-07-20 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
5,000 -1.8%
17.60
US$87,978 		5,000 -1.8% 17.60 US$87,978
2020-06-23 2020-06-22 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
23,605 -7.9%
25.06
US$591,617 		23,605 -7.9% 25.06 US$591,617
2020-06-18 2020-06-18 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
11,127 -3.9%
25.01
US$278,329 		11,127 -3.9% 25.01 US$278,329
2020-06-18 2020-06-17 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
268 -0.1%
25.01
US$6,703 		268 -0.1% 25.01 US$6,703
2020-06-17 2020-06-16 S Sale
3.8
PATTERSON LEONE D

President

Officer
13,171 -10.7%
24.68
US$325,060 		13,171 -10.7% 24.68 US$325,060
2020-06-17 2020-06-15 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
159 -0.1%
23.59
US$3,751 		159 -0.1% 23.59 US$3,751
2020-06-17 2020-06-15 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
3,425 -1.2%
23.00
US$78,787 		3,425 -1.2% 23.00 US$78,787
2020-06-17 2020-06-15 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
1,416 -0.5%
21.93
US$31,047 		1,416 -0.5% 21.93 US$31,047
2020-06-17 2020-06-15 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
5,000 -1.8%
21.01
US$105,042 		5,000 -1.8% 21.01 US$105,042
2020-05-22 2020-05-20 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
1,401 -0.5%
20.01
US$28,030 		1,401 -0.5% 20.01 US$28,030
2020-05-20 2020-05-18 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
300 -0.1%
19.03
US$5,709 		300 -0.1% 19.03 US$5,709
2020-05-20 2020-05-18 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
4,700 -1.7%
18.11
US$85,124 		4,700 -1.7% 18.11 US$85,124
2020-05-20 2020-05-06 PlS Planned sale
Gasmi Mehdi
Non-Executive Director
25,000 -8.3%
20.03
US$500,668 		25,000 -8.3% 20.03 US$500,668
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