ASMB insider buying – Assembly Biosciences, Inc.
9 insider purchases since 2016 worth $21.7M by 4 different insiders. Last 12 months: 0 purchases, $0. Most recent filing: 2024-12-31.
Same time range as the chart above - each mark sits under the week of the trade. Circles = purchases (height = price paid, size = amount), red triangles = open-market sales of $50k+. Prices as reported, not adjusted for later stock splits. 2 older purchases (before the 5-year window) are listed in the table below.
Purchases are open-market buys (SEC Form 4, code "P") - insiders paying with their own money. Sales are open-market sales (code "S") of $50,000 or more; many sales are pre-planned (Rule 10b5-1) or made for taxes and diversification. Each row links to the original filing.
Bought, sold, still holding?
| Insider | Bought | First / last buy | Sold since 2016 | Holds now* | Status |
|---|---|---|---|---|---|
| GILEAD SCIENCES, INC. 10% Owner | $20.1M 1× · 940,499 sh | 2024-12-19 2024-12-19 | – | 4,977,089 shares as of 2026-05-27 | Holds - never sold |
| Schornstein Alexander 10% Owner | $1.4M 5× · 1,089,080 sh | 2023-11-20 2024-11-22 | – | 728,113 shares as of 2024-11-26 | Holds - never sold |
| Small Derek A CEO | $154,814 2× · 12,400 sh | 2016-02-10 2018-07-19 | – | 828,791 shares as of 2020-01-03 | Holds - never sold |
| Houghton Michael Director | $49,983 1× · 3,202 sh | 2024-12-30 2024-12-30 | – | 3,202 shares as of 2024-12-31 | Holds - never sold |
* Shares held after the insider's most recent SEC filing for this company (all share classes, direct and indirect). If an insider stops filing, later changes are not known.
Insider buying and selling by year
| Year | Purchases | Bought | Buyers | Sales | Sold |
|---|---|---|---|---|---|
| 2024 | 6 | $21.3M | 3 | – | – |
| 2023 | 1 | $283,000 | 1 | – | – |
| 2020 | 0 | – | – | 2 | $382,457 |
| 2019 | 0 | – | – | 1 | $826,525 |
| 2018 | 1 | $99,552 | 1 | 2 | $679,342 |
| 2017 | 0 | – | – | 1 | $76,142 |
| 2016 | 1 | $55,262 | 1 | – | – |
Insider purchases
| Filed | Insider | Role | Shares | Avg price | Value | Holdings | Filing |
|---|---|---|---|---|---|---|---|
| 2024-12-31 | Houghton Michael | Director | 3,202 | $15.61 | $49,983 | SEC | |
| 2024-12-23 | GILEAD SCIENCES, INC. | 10% Owner | 940,499 | $21.37 | $20.1M | +74.1% | SEC |
| 2024-11-26 | Schornstein Alexander | 10% Owner | 25,000 | $14.88 | $372,037 | +3.6% | SEC |
| 2024-10-09 | Schornstein Alexander | 10% Owner | 10,000 | $14.58 | $145,800 | +1.4% | SEC |
| 2024-07-08 | Schornstein Alexander | 10% Owner | 9,000 | $12.40 | $111,631 | +1.3% | SEC |
| 2024-01-19 | Schornstein Alexander | 10% Owner | 645,080 | $0.79 | $510,064 | +8.5% | SEC |
| 2023-11-22 | Schornstein Alexander | 10% Owner | 400,000 | $0.71 | $283,000 | +5.6% | SEC |
| 2018-07-20 | Small Derek A | CEO | 2,400 | $41.48 | $99,552 | +0.4% | SEC |
| 2016-02-12 | Small Derek A | CEO | 10,000 | $5.53 | $55,262 | +1.6% | SEC |
Insider sales
| Filed | Insider | Role | Shares | Avg price | Value | Type | Filing |
|---|---|---|---|---|---|---|---|
| 2020-08-10 | McHutchison John G | CEO | 12,151 | $21.81 | $264,965 | Sale | SEC |
| 2020-03-31 | Colonno Richard James | Officer | 7,812 | $15.04 | $117,492 | Sale | SEC |
| 2019-12-16 | Colonno Richard James | Officer | 33,061 | $25.00 | $826,525 | Sale | SEC |
| 2018-09-07 | Lopatin Uri A | Officer | 15,540 | $40.09 | $622,972 | Sale | SEC |
| 2018-03-02 | RINGO WILLIAM R | Director | 1,000 | $56.37 | $56,370 | Sale | SEC |
| 2017-05-16 | RINGO WILLIAM R | Director | 3,461 | $22.00 | $76,142 | Sale | SEC |
Compiled automatically from public SEC filings. Not investment advice. Get every new insider purchase in the daily report.
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