ASSEMBLY BIOSCIENCES, INC. (ASMB)

Latest Insider Confidence Score

2025Q4

50.2
Bullish

Company insider confidence (by quarter)

2010Q4 2025Q4

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Zlotnick Adam — 1,321,009 Sep 9, 2014
Gilead Sciences, Inc. — 1,147,960 Oct 3, 2025
Small Derek A CEO 828,791 Jan 3, 2020
Schornstein Alexander 10% Owner 728,113 Nov 26, 2024
Ellison Russell H CEO 533,333 Apr 15, 2015

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Aug 8, 2025 Oct 3, 2025 GILEAD SCIENCES, INC. 10% Owner Neutral 90.0 +2,295,920 103.91% ✗ -
Jun 16, 2025 Jun 17, 2025 Bjorkquist Jeanette M PFO and PAO Neutral 85.0 +300 6.25% ✗ -
Jun 5, 2025 Jun 9, 2025 Houghton Michael Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 9, 2025 Mahony Susan Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 9, 2025 McHutchison John G Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 9, 2025 Johnson-Pratt Lisa Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 9, 2025 RINGO WILLIAM R Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 9, 2025 ALTIG ANTHONY E Director Neutral 52.5 - 0.00% ✗ -
Jun 5, 2025 Jun 9, 2025 Consylman Gina Director Neutral 52.5 - 0.00% ✗ -
Mar 31, 2025 Apr 15, 2025 McHutchison John G Director Sell 47.5 -757 -3.96% ✗ $7.5K
Mar 29, 2025 Apr 1, 2025 Delaney William E IV Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Mar 29, 2025 Apr 1, 2025 Bjorkquist Jeanette M Principal Accounting Officer Sell 90.0 +1,475 46.94% ✗ $1.8K
Mar 31, 2025 Apr 1, 2025 Okazaki Jason A CEO Sell 47.5 -355 -2.35% ✗ $3.5K
Mar 31, 2025 Apr 1, 2025 White Nicole S Chief Manufacturing Officer Sell 47.5 -197 -1.66% ✗ $1.9K
Mar 29, 2025 Apr 1, 2025 Gaggar Anuj Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Dec 30, 2024 Dec 31, 2024 Houghton Michael Director Buy 91.3 +3,202 100.00% ✗ $50K
Nov 22, 2024 Nov 26, 2024 Schornstein Alexander 10% Owner Buy 90.0 +25,000 3.56% ✗ $372K
Nov 18, 2024 Nov 19, 2024 White Nicole S Chief Manufacturing Officer Sell 52.5 -40 -0.34% ✗ $651.6
Oct 8, 2024 Oct 9, 2024 Schornstein Alexander 10% Owner Buy 82.5 +10,000 1.44% ✗ $145.8K
Oct 3, 2024 Oct 4, 2024 White Nicole S Chief Manufacturing Officer Sell 47.5 -157 -1.30% ✗ $2.3K
Oct 3, 2024 Oct 4, 2024 Okazaki Jason A CEO Sell 47.5 -197 -1.30% ✗ $2.9K
Aug 2, 2024 Aug 5, 2024 White Nicole S Chief Manufacturing Officer Sell 46.3 -785 -6.11% ✗ $11.2K
Aug 2, 2024 Aug 5, 2024 Okazaki Jason A CEO Sell 46.3 -981 -6.10% ✗ $14K
Jul 3, 2024 Jul 8, 2024 Schornstein Alexander 10% Owner Buy 82.5 +9,000 1.32% ✗ $111.6K
May 29, 2024 May 30, 2024 Johnson-Pratt Lisa Director Neutral 52.5 - 0.00% ✗ -
May 29, 2024 May 30, 2024 McHutchison John G Director Neutral 52.5 - 0.00% ✗ -
May 29, 2024 May 30, 2024 Mahony Susan Director Neutral 52.5 - 0.00% ✗ -
May 29, 2024 May 30, 2024 Houghton Michael Director Neutral 52.5 - 0.00% ✗ -
May 29, 2024 May 30, 2024 Consylman Gina Director Neutral 52.5 - 0.00% ✗ -
May 29, 2024 May 30, 2024 ALTIG ANTHONY E Director Neutral 52.5 - 0.00% ✗ -
May 29, 2024 May 30, 2024 RINGO WILLIAM R Director Neutral 52.5 - 0.00% ✗ -
May 23, 2024 May 24, 2024 Bjorkquist Jeanette M Principal Accounting Officer Sell 50.0 -24 -0.76% ✗ $358.4
May 23, 2024 May 24, 2024 McHutchison John G Director Sell 46.3 -2,117 -9.98% ✗ $31.6K
May 23, 2024 May 24, 2024 White Nicole S Chief Manufacturing Officer Sell 47.5 -172 -1.32% ✗ $2.6K
May 23, 2024 May 24, 2024 Okazaki Jason A CEO Sell 47.5 -549 -3.30% ✗ $8.2K
Apr 29, 2024 May 1, 2024 White Nicole S Chief Manufacturing Officer Sell 91.3 +2,078 18.98% ✗ $15.9K
Apr 29, 2024 May 1, 2024 Okazaki Jason A CEO Sell 91.3 +2,597 18.78% ✗ $19.9K
Apr 29, 2024 May 1, 2024 Delaney William E IV Chief Scientific Officer Neutral 90.0 +3,333 26.09% ✗ -
Apr 1, 2024 Apr 2, 2024 McHutchison John G Director Sell 46.3 -1,206 -5.38% ✗ $15.8K
Mar 29, 2024 Apr 2, 2024 Bjorkquist Jeanette M Principal Accounting Officer Sell 90.0 +736 30.29% ✗ $1.5K
Apr 1, 2024 Apr 2, 2024 White Nicole S Chief Manufacturing Officer Sell 47.5 -197 -1.77% ✗ $2.6K
Mar 29, 2024 Apr 2, 2024 Delaney William E IV Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Apr 1, 2024 Apr 2, 2024 Okazaki Jason A CEO Sell 47.5 -354 -2.50% ✗ $4.6K
Mar 27, 2024 Mar 29, 2024 Okazaki Jason A CEO Sell 47.5 -392 -2.69% ✗ $5K
Mar 15, 2024 Cook Robert Donald II Director Neutral 52.5 - 0.00% ✗ -
Jan 17, 2024 Jan 19, 2024 Schornstein Alexander 10% Owner Buy 92.5 +645,080 8.53% ✗ $511.3K
Dec 11, 2023 Cihlar Tomas Director Neutral 52.5 - 0.00% ✗ -
Nov 20, 2023 Nov 22, 2023 Schornstein Alexander 10% Owner Buy 92.5 +400,000 5.58% ✗ $282.1K
Nov 17, 2023 Nov 21, 2023 White Nicole S Chief Manufacturing Officer Sell 50.0 -477 -0.51% ✗ $328.7
Nov 8, 2023 Nov 13, 2023 Gaggar Anuj Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Nov 13, 2023 Gaggar Anuj Chief Medical Officer Neutral 52.5 - 0.00% ✗ -
Oct 31, 2023 Schornstein Alexander 10% Owner Neutral 52.5 - 0.00% ✗ -
Oct 2, 2023 Oct 4, 2023 White Nicole S Chief Manufacturing Officer Sell 85.0 +8,109 9.41% ✗ $1.5K
Oct 2, 2023 Oct 4, 2023 Delaney William E IV Chief Scientific Officer Sell 85.0 +8,109 5.68% ✗ $1.5K
Oct 2, 2023 Oct 4, 2023 Okazaki Jason A CEO Sell 85.0 +10,137 6.15% ✗ $1.9K
Sep 18, 2023 White Nicole S Chief Manufacturing Officer Neutral 52.5 - 0.00% ✗ -
Aug 2, 2023 Aug 3, 2023 Delaney William E IV Chief Scientific Officer Sell 46.3 -9,461 -6.22% ✗ $10.3K
Aug 2, 2023 Aug 3, 2023 Okazaki Jason A CEO Sell 46.3 -11,827 -6.70% ✗ $12.9K
Jul 24, 2023 Jul 25, 2023 Bjorkquist Jeanette M Principal Accounting Officer Sell 47.5 -844 -3.07% ✗ $900.4
Jun 22, 2023 Jun 23, 2023 Delaney William E IV Chief Scientific Officer Neutral 90.0 +40,000 35.65% ✗ -
Jun 22, 2023 Jun 23, 2023 Okazaki Jason A CEO Neutral 90.0 +50,000 39.49% ✗ -
May 30, 2023 May 31, 2023 Delaney William E IV Chief Scientific Officer Sell 47.5 -4,232 -3.63% ✗ $4K
May 25, 2023 May 30, 2023 RINGO WILLIAM R Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 McHutchison John G Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 Mahony Susan Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 Johnson-Pratt Lisa Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 Houghton Michael Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 Consylman Gina Director Neutral 52.5 - 0.00% ✗ -
May 25, 2023 May 30, 2023 ALTIG ANTHONY E Director Neutral 52.5 - 0.00% ✗ -
May 22, 2023 May 24, 2023 McHutchison John G Director Sell 91.3 +91,528 24.55% ✗ $27K
May 22, 2023 May 24, 2023 Bjorkquist Jeanette M Principal Accounting Officer Sell 82.5 +1,226 4.66% ✗ $285
May 22, 2023 May 24, 2023 Delaney William E IV Chief Scientific Officer Sell 90.0 +28,439 32.32% ✗ $6.8K
May 22, 2023 May 24, 2023 Okazaki Jason A CEO Sell 90.0 +28,439 28.97% ✗ $6.8K
Mar 30, 2023 Mar 31, 2023 McHutchison John G Director Sell 46.3 -14,883 -7.73% ✗ $12.3K
Mar 29, 2023 Mar 31, 2023 Bjorkquist Jeanette M Principal Accounting Officer Sell 90.0 +5,476 29.87% ✗ $637.2
Mar 30, 2023 Mar 31, 2023 Delaney William E IV Chief Scientific Officer Sell 47.5 -3,421 -3.85% ✗ $2.8K
Mar 30, 2023 Mar 31, 2023 Okazaki Jason A CEO Sell 47.5 -4,247 -4.15% ✗ $3.5K
Mar 27, 2023 Mar 28, 2023 Okazaki Jason A CEO Sell 47.5 -4,693 -4.38% ✗ $4.8K
Feb 16, 2023 Feb 17, 2023 Delaney William E IV Chief Scientific Officer Neutral 90.0 +10,000 12.67% ✗ -
Feb 16, 2023 Feb 17, 2023 Okazaki Jason A CEO Neutral 90.0 +12,500 13.21% ✗ -
Sep 13, 2022 Bjorkquist Jeanette M Principal Accounting Officer Neutral 52.5 - 0.00% ✗ -
Aug 8, 2022 Aug 10, 2022 McHutchison John G CEO Sell 36.3 -12,314 -6.01% ✓ $26.2K
Aug 1, 2022 Aug 3, 2022 Delaney William E IV Chief Scientific Officer Neutral 52.5 - 0.00% ✗ -
Aug 1, 2022 Aug 3, 2022 Okazaki Jason A COO Neutral 52.5 - 0.00% ✗ -
Jul 25, 2022 Jul 26, 2022 Samar Michael P. CFO Sell 46.3 -2,020 -2.55% ✓ $4.5K
May 31, 2022 Jun 2, 2022 Delaney William E IV Chief Scientific Officer Sell 37.5 -4,164 -5.17% ✓ $8K
May 25, 2022 May 27, 2022 Mahony Susan Director Neutral 52.5 - 0.00% ✗ -
May 25, 2022 May 27, 2022 Johnson-Pratt Lisa Director Neutral 52.5 - 0.00% ✗ -
May 25, 2022 May 27, 2022 Houghton Michael Director Neutral 52.5 - 0.00% ✗ -
May 25, 2022 May 27, 2022 DiMarchi Richard D Director Neutral 52.5 - 0.00% ✗ -
May 25, 2022 May 27, 2022 Consylman Gina Director Neutral 52.5 - 0.00% ✗ -
May 25, 2022 May 27, 2022 ALTIG ANTHONY E Director Neutral 52.5 - 0.00% ✗ -
May 25, 2022 May 27, 2022 RINGO WILLIAM R Director Neutral 52.5 - 0.00% ✗ -
Mar 29, 2022 Mar 31, 2022 Samar Michael P. CFO Sell 90.0 +23,965 45.40% ✓ $5K
Mar 29, 2022 Mar 31, 2022 Stamm Luisa M Chief Medical Officer Sell 90.0 +21,462 113.84% ✓ $2.2K
Mar 29, 2022 Mar 31, 2022 Delaney William E IV Chief Scientific Officer Sell 90.0 +23,962 44.27% ✓ $2.2K
Mar 29, 2022 Mar 31, 2022 Okazaki Jason A COO Sell 90.0 +29,981 46.39% ✓ $2.8K
Mar 29, 2022 Mar 31, 2022 McHutchison John G CEO Sell 91.3 +79,136 62.96% ✓ $10K
Mar 28, 2022 Mar 29, 2022 Okazaki Jason A COO Sell 36.3 -4,617 -6.67% ✓ $10.4K
Aug 9, 2021 Aug 10, 2021 McHutchison John G CEO Sell 32.5 -12,156 -8.82% ✓ $43.8K