Latest Period
Q2 2026
Security Snapshot
ASSEMBLY BIOSCIENCES, INC. - Common Stock, $0.001 par value per share (ASMB) Institutional Ownership
CUSIP: 045396207
13F Institutional Holders and Ownership History from Q1 2024 to Q2 2026
Institutions Reporting
91
Shares (Excl. Options)
18,732,775
Price
$27.48
Save this security page for your next review
Keep this CUSIP in your watchlists so you can revisit quarter changes from one place. If you create an account from here, we will bring you back after verification.
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Symbol
- ASMB on Nasdaq
- All holders as of 30 Jun 2026
- Q2 2026
- Total 13F shares
- 18,732,775
- Total 13F value
- $514,784,783
- Portfolio coverage rank
- 0%
- Share change
- +5,140,118
- Value change
- +$141,036,962
- Number of holders
- 91
- Shares outstanding
- 19,919,846
- SEC-reported price per share
- $25.55
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
2 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- ASMB - ASSEMBLY BIOSCIENCES, INC. - Common Stock, $0.001 par value per share is tracked under CUSIP 045396207.
- 91 institutions reported positions in Q2 2026.
- 8 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 74 to 91 between Q1 2026 and Q2 2026.
- SEC-reported value moved from $376,381,234 to $514,784,783.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 91 institutions filings for Q2 2026.
Security key
045396207
Latest holder period
Q2 2026
13F holders
91
13D/G owners
8
CIK / CUSIP context first
Open Q2 2026 holders
ASMB full holder history
ASSEMBLY BIOSCIENCES, INC. SEC filings
ASSEMBLY BIOSCIENCES, INC. company facts
ASSEMBLY BIOSCIENCES, INC. insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 045396207:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
8
Security
ASMB
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Commodore Capital LP | 9.9% | $29,281,576 | 1,615,981 | Commodore Capital LP | 08 Aug 2025 | |||
| FARALLON CAPITAL MANAGEMENT, L.L.C. | 8.1% | $46,484,972 | 1,604,590 | Farallon Capital Management, L.L.C. | 30 Jun 2026 | |||
| Paradigm Biocapital Advisors LP | 7.8% | $45,012,080 | 1,553,748 | Paradigm BioCapital Advisors LP | 30 Jun 2026 | |||
| RA CAPITAL MANAGEMENT, L.P. | 9.5% | $28,392,908 | 1,530,615 | RA Capital Management, L.P. | 11 Aug 2025 | |||
| Janus Henderson Group Ltd. | 6.9% | -16% | $39,385,121 | +$521,634 | 1,359,514 | +1.3% | JANUS HENDERSON GROUP Ltd. | 30 Jun 2026 |
| Farallon Capital Partners, L.P. | 7.8% | +7.1% | $38,963,707 | +$2,763,919 | 1,227,590 | +7.6% | Dapice Joshua J. | 31 Dec 2025 |
| Schornstein Alexander | 3.5% | -65% | $10,082,352 | -$3,424,144 | 543,523 | -25% | Alexander Schornstein | 11 Aug 2025 |
| ARMISTICE CAPITAL, LLC | 10% | $5,252,553 | 289,876 | Armistice Capital, LLC | 30 Jun 2025 |
As of 30 Jun 2026, 91 institutional investors reported holding 18,732,775 shares of ASSEMBLY BIOSCIENCES, INC. - Common Stock, $0.001 par value per share (ASMB). This represents 94% of the company’s total 19,919,846 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
86%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| GILEAD SCIENCES, INC. | 25% | 4,977,089 | +10% | 8.3% | $136,770,406 |
| FARALLON CAPITAL MANAGEMENT, L.L.C. | 8.1% | 1,604,590 | +31% | 0.26% | $44,094,133 |
| Paradigm Biocapital Advisors LP | 7.8% | 1,553,748 | +134% | 0.8% | $42,696,995 |
| Commodore Capital LP | 7.1% | 1,415,000 | +42% | 2.3% | $38,884,200 |
| RA CAPITAL MANAGEMENT, L.P. | 5.1% | 1,020,410 | 0% | 0.24% | $28,040,867 |
| Jupiter Topco LLC | 4.3% | 849,309 | 0% | 0.01% | $23,368,737 |
| BlackRock, Inc. | 3.8% | 766,819 | +278% | 0% | $21,072,187 |
| Parkman Healthcare Partners LLC | 3.6% | 721,181 | +75% | 2% | $19,818,054 |
| VANGUARD CAPITAL MANAGEMENT LLC | 2.8% | 558,942 | +14% | 0% | $15,359,726 |
| Point72 Asset Management, L.P. | 2.3% | 460,593 | +34% | 0.02% | $12,657,096 |
| Seven Fleet Capital Management LP | 2.2% | 433,147 | +671% | 2% | $11,902,879 |
| MILLENNIUM MANAGEMENT LLC | 1.5% | 298,807 | +28% | 0.01% | $8,211,216 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.4% | 280,424 | +111% | 0% | $7,707,832 |
| Schonfeld Strategic Advisors LLC | 1.2% | 242,153 | +101% | 0.04% | $6,654,363 |
| AMERIPRISE FINANCIAL INC | 1.2% | 230,000 | 0% | $6,320,400 | |
| DV EQUITIES, LLC | 1.1% | 226,415 | 0.9% | $6,221,884 | |
| Aberdeen Group plc | 1% | 207,047 | 0.01% | $5,689,652 | |
| Affinity Asset Advisors, LLC | 0.95% | 190,000 | 0.26% | $5,221,200 | |
| B Group, Inc. | 0.88% | 175,706 | 0% | 2.7% | $4,828,401 |
| STATE STREET CORP | 0.86% | 171,931 | +203% | 0% | $4,724,664 |
| STEMPOINT CAPITAL LP | 0.86% | 170,378 | -8.1% | 0.81% | $4,681,987 |
| Squadron Capital Management LLC | 0.8% | 160,000 | 1.5% | $4,396,800 | |
| Woodline Partners LP | 0.76% | 150,780 | 0.01% | $4,143,434 | |
| Driehaus Capital Management LLC | 0.75% | 150,000 | 0.02% | $4,122,000 | |
| Ally Bridge Group (NY) LLC | 0.7% | 140,000 | 5% | $3,847,200 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
10
Latest
Q2 2026
Rows shown
1-10 of 10
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q2 | 18,732,775 | $514,784,783 | +$141,036,962 | $27.48 | 91 |
| 2026 Q1 | 13,568,603 | $376,381,234 | -$6,937,135 | $27.75 | 74 |
| 2025 Q4 | 13,724,214 | $466,681,283 | +$45,981,788 | $34.01 | 69 |
| 2025 Q3 | 12,244,439 | $313,500,808 | +$233,088,276 | $25.60 | 56 |
| 2025 Q2 | 3,148,479 | $57,049,319 | +$415,033 | $18.12 | 33 |
| 2025 Q1 | 3,175,639 | $30,358,304 | -$551,384 | $9.56 | 36 |
| 2024 Q4 | 3,185,761 | $50,270,587 | -$3,179,725 | $15.78 | 35 |
| 2024 Q3 | 1,026,987 | $15,540,749 | -$2,242,995 | $15.14 | 30 |
| 2024 Q2 | 1,175,256 | $16,110,171 | +$7,242,756 | $13.72 | 27 |
| 2024 Q1 | 647,283 | $8,609,474 | +$8,609,474 | $13.30 | 24 |