← United States · Coverage record
US · SEC FORM 4
ASSEMBLY BIOSCIENCES, INC.
ASMB · Nasdaq · CIK 0001426800 · Healthcare · Biotechnology
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
2 Form 4 transaction lines observed in the same window
1 sales · 1 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
—
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2025-08-08 · GILEAD SCIENCES, INC..
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context provides additional background on recent price performance and risk. It does not affect the Insider Signal.
Price performance
- 1M
- -30.6%
- 3M
- -16.7%
- 6M
- -23.6%
- 12M
- -4.4%
Volatility & liquidity
- Volatility
- 62.7%
- Beta
- —
- Avg daily value
- USD 6.4M
Valuation
- Market cap
- USD 464.6M
- P/E
- —
Fundamentals
- Profit margin
- -8.5%
- ROE
- -3.0%
- Industry
- Biotechnology
Market data
Price data up to: 2026-10-08 · Price source: OpenBB/yfinance; volume from price cache (yfinance) · From SEC filings: Market cap, Profit margin, ROE · Fiscal year ended: 2025-12-31 · Market cap is the shares outstanding stated on the filing cover multiplied by the latest close. Share count date: 2026-08-07 · Status: PASS
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 2,822,392
- Previous report
- 2,095,568
- Avg daily volume
- 412,950
- Days to cover
- 6.8
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2025-08-08 | GILEAD SCIENCES, INC. | Purchase (P) | Common Stock | 2,295,920 | USD — | USD — | SEC filing ↗ |
| 2024-12-30 | Houghton Michael | Purchase (P) | Common Stock | 3,202 | USD 15.61 | USD 49,983 | SEC filing ↗ |
| 2024-12-19 | GILEAD SCIENCES, INC. | Purchase (P) | Common Stock | 940,499 | USD 21.37 | USD 20,098,464 | SEC filing ↗ |
| 2024-11-25 | Schornstein Alexander | Purchase (P) | Common Stock | 7,976 | USD 14.91 | USD 118,890 | SEC filing ↗ |
| 2024-11-22 | Schornstein Alexander | Purchase (P) | Common Stock | 17,024 | USD 14.87 | USD 253,147 | SEC filing ↗ |
| 2024-10-08 | Schornstein Alexander | Purchase (P) | Common Stock | 10,000 | USD 14.58 | USD 145,800 | SEC filing ↗ |
| 2024-07-05 | Schornstein Alexander | Purchase (P) | Common Stock | 4,438 | USD 12.52 | USD 55,564 | SEC filing ↗ |
| 2024-07-03 | Schornstein Alexander | Purchase (P) | Common Stock | 4,562 | USD 12.29 | USD 56,067 | SEC filing ↗ |
| 2024-06-17 | GILEAD SCIENCES, INC. | Purchase (P) | Common Stock | 179,500 | USD — | USD — | SEC filing ↗ |
| 2024-01-18 | Schornstein Alexander | Purchase (P) | Common Stock | 345,086 | USD 0.80 | USD 276,069 | SEC filing ↗ |
| 2024-01-17 | Schornstein Alexander | Purchase (P) | Common Stock | 299,994 | USD 0.78 | USD 233,995 | SEC filing ↗ |
| 2023-11-21 | Schornstein Alexander | Purchase (P) | Common Stock | 100,000 | USD 0.67 | USD 67,000 | SEC filing ↗ |
| 2023-11-20 | Schornstein Alexander | Purchase (P) | Common Stock | 300,000 | USD 0.72 | USD 216,000 | SEC filing ↗ |
Form 4 evidence
11 transaction lines in the latest 365-day window; 115 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-06-17 | Bjorkquist Jeanette M | Sale (S) | Common Stock | 29 | USD 23.25 | USD 674 | SEC filing ↗ |
| 2026-05-26 | GILEAD SCIENCES, INC. | Award / grant (A) | Common Stock | 471,698 | USD 26.50 | USD 12,499,997 | SEC filing ↗ |
| 2026-03-30 | White Nicole S | Sale (S) | Common Stock | 197 | USD 26.69 | USD 5,258 | SEC filing ↗ |
Show recent Form 4 evidence (9 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-06-17 | Bjorkquist Jeanette M | Sale (S) | Common Stock | 29 | USD 23.25 | USD 674 | SEC filing ↗ |
| 2026-05-26 | GILEAD SCIENCES, INC. | Award / grant (A) | Common Stock | 471,698 | USD 26.50 | USD 12,499,997 | SEC filing ↗ |
| 2026-03-30 | White Nicole S | Sale (S) | Common Stock | 197 | USD 26.69 | USD 5,258 | SEC filing ↗ |
| 2026-03-30 | Bjorkquist Jeanette M | Sale (S) | Common Stock | 328 | USD 26.69 | USD 8,755 | SEC filing ↗ |
| 2026-03-29 | White Nicole S | Award / grant (A) | Common Stock | 26,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-29 | Okazaki Jason A | Award / grant (A) | Common Stock | 94,250 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-29 | Gaggar Anuj | Award / grant (A) | Common Stock | 26,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-29 | Delaney William E IV | Award / grant (A) | Common Stock | 26,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-29 | Bjorkquist Jeanette M | Award / grant (A) | Common Stock | 6,500 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | ASMB |
| CIK | 0001426800 |
| Sector | Healthcare |
| Industry | Biotechnology Yahoo Finance |
| SEC SIC | 2834 Pharmaceutical Preparations |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 115 transaction lines from 2020-01-02 to 2026-06-17 14 P purchase lines · 59 S sale lines · 42 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.