Assembly Biosciences, Inc.
ASMBFigures shown here come from public SEC filings. Dates beside each section show the available history.
How Assembly Biosciences, Inc. Makes Money
Follow each dollar of revenue through to what shareholders keep.
From revenue to net income
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Financial Summary
Choose a year or quarter, compare it with the same period a year earlier, and open any row for its full filing history.
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SEC filings supply these figures; updates after the dates shown are not included. This page includes 19 annual periods. The latest annual period ends Dec 31, 2025. The latest insider filing shown is dated Jun 18, 2026. The latest institutional report shown is dated Dec 31, 2023; other ownership filings may exist.
Ownership
Who holds the shares, as reported in SEC ownership filings.
Reported 13F positions
Each row shows what a filer reported for one date, not a current position. The link opens that filing.
| Filer | Report date | Shares | Value | Filing |
|---|---|---|---|---|
| MORGAN STANLEY | 2023-12-31 | 30,660 | Not shown | SEC filing |
| JPMORGAN CHASE & CO | 2023-12-31 | 94 | Not shown | SEC filing |
| BARCLAYS PLC | 2023-12-31 | 35,928 | Not shown | SEC filing |
| BARCLAYS PLC | 2023-09-30 | 35,928 | Not shown | SEC filing |
| BARCLAYS PLC | 2023-06-30 | 35,928 | Not shown | SEC filing |
| BARCLAYS PLC | 2023-03-31 | 35,928 | Not shown | SEC filing |
| BARCLAYS PLC | 2022-12-31 | 35,928 | Not shown | SEC filing |
- Each value is checked against Assembly Biosciences, Inc.'s share prices from within about three months of its report date (insiders' Form 4 trades and the latest close).
- Value not shown for 7 rows: no share price from within three months of their report dates is on file, so they could not be checked.
Filer report history
Two reports per filer, as filed. No change is calculated, because the data on file cannot confirm that both reports describe the same security.
- BARCLAYS PLC: 35,928 shares reported 2023-09-30; 35,928 shares reported 2023-12-31.
- BARCLAYS PLC: 35,928 shares reported 2023-06-30; 35,928 shares reported 2023-09-30.
- BARCLAYS PLC: 35,928 shares reported 2023-03-31; 35,928 shares reported 2023-06-30.
- BARCLAYS PLC: 35,928 shares reported 2022-12-31; 35,928 shares reported 2023-03-31.
2 filers have only one report here.
Unusually large insider trades
Each trade is compared with the other insider trades of the same kind in the same security among Assembly Biosciences, Inc.'s recent filings on file. Size alone is context, not a prediction or evidence of improper trading.
- 2025-08-08 · GILEAD SCIENCES, INC.: Larger than all 15 other insider purchases of Common Stock on file. SEC filing
- 2024-12-19 · GILEAD SCIENCES, INC.: Larger than 14 of the 15 other insider purchases of Common Stock on file. SEC filing
- 2023-08-02 · Okazaki Jason A: Larger than 56 of the 62 other insider sales of Common Stock on file. SEC filing
- 2023-05-23 · McHutchison John G: Larger than 61 of the 62 other insider sales of Common Stock on file. SEC filing
- 2023-03-30 · McHutchison John G: Larger than 59 of the 62 other insider sales of Common Stock on file. SEC filing
- 2022-08-08 · McHutchison John G: Larger than 58 of the 62 other insider sales of Common Stock on file. SEC filing
- 2021-08-09 · McHutchison John G: Larger than 57 of the 62 other insider sales of Common Stock on file. SEC filing
- 2019-12-12 · Colonno Richard James: Larger than all 62 other insider sales of Common Stock on file. SEC filing
- 2018-09-05 · Lopatin Uri A: Larger than 60 of the 62 other insider sales of Common Stock on file. SEC filing
Purchases & sales (open market or private)
| Security | Code | Price | Filing | |||
|---|---|---|---|---|---|---|
| 2026-06-17 | Bjorkquist Jeanette M · PFO and PAO | Common Stock | S — Open market or private sale | −29 | 23.25 | SEC filing |
| 2026-03-30 | White Nicole S · Chief Manufacturing Officer | Common Stock | S — Open market or private sale | −188 | 26.65 | SEC filing |
| 2026-03-30 | Bjorkquist Jeanette M · PFO and PAO | Common Stock | S — Open market or private sale | −16 | 27.49 | SEC filing |
| 2026-03-30 | White Nicole S · Chief Manufacturing Officer | Common Stock | S — Open market or private sale | −9 | 27.49 | SEC filing |
| 2026-03-30 | Bjorkquist Jeanette M · PFO and PAO | Common Stock | S — Open market or private sale | −312 | 26.65 | SEC filing |
| 2025-08-08 | GILEAD SCIENCES, INC. · 10% owner | Class A warrants to purchase Common Stock | P — Open market or private purchase | +1,147,960 | unknown | SEC filing |
| 2025-08-08 | GILEAD SCIENCES, INC. · 10% owner | Class B warrants to purchase Common Stock | P — Open market or private purchase | +1,147,960 | unknown | SEC filing |
| 2025-08-08 | GILEAD SCIENCES, INC. · 10% owner | Common Stock | P — Open market or private purchase | +2,295,920 | unknown | SEC filing |
Showing 8 of 20 rows
Grants, exercises, tax & gifts
| Security | Code | Filing | |||
|---|---|---|---|---|---|
| 2026-06-04 | McHutchison John G · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +8,000 | SEC filing |
| 2026-06-04 | Johnson-Pratt Lisa · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +8,000 | SEC filing |
| 2026-06-04 | Mahony Susan · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +8,000 | SEC filing |
| 2026-06-04 | Houghton Michael · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +8,000 | SEC filing |
| 2026-06-04 | Consylman Gina · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +8,000 | SEC filing |
| 2026-06-04 | ALTIG ANTHONY E · Director | Stock Option (right to buy) | A — Grant, award, or other acquisition | +8,000 | SEC filing |
| 2026-05-26 | GILEAD SCIENCES, INC. · 10% owner | Common Stock | A — Grant, award, or other acquisition | +471,698 | SEC filing |
| 2026-03-29 | White Nicole S · Chief Manufacturing Officer | Common Stock | A — Grant, award, or other acquisition | +14,000 | SEC filing |
Showing 8 of 13 rows
These tables describe filed transactions, not current holdings. Prices are shown as filed; a currency is added only when the filing's data names one. Amended and possible duplicate rows are left out of size comparisons and transaction groups.