Security key
045396207
ASSEMBLY BIOSCIENCES, INC. - Common Stock, par value $0.001 per shares (the "Shares") (ASMB)
CUSIP: 045396207
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock, par value $0.001 per shares (the "Shares")
- Total 13F shares
- 12,244,439
- Total 13F value
- $313,500,808
- Share change
- +9,096,204
- SEC-reported price per share
- $25.60
- Number of holders
- 56
- Value change
- +$233,088,276
- Number of buys
- 45
- Number of sells
- 9
- Shares outstanding
- 15,738,333
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2025
Institutions
56
Top holders
10
ASMB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
ASSEMBLY BIOSCIENCES, INC. SEC filings
ASSEMBLY BIOSCIENCES, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 045396207
Recent filing periods:
Ownership snapshot
Top reported holders of ASMB - ASSEMBLY BIOSCIENCES, INC. - Common Stock, par value $0.001 per shares (the "Shares") (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Commodore Capital LP
Disclosed value leader
GILEAD SCIENCES, INC.
Comparable rows
15/15
Latest evidence
11 Aug 2025
13D/G
3/4/5
13F
Lead comparable stake: 9.9%
13D/G row: Commodore Capital LP
Showing 1-6 of 15 holder rows.
Quick read
Commodore Capital LP leads the comparable SEC ownership view at 9.9%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Commodore Capital LP's linked filing trail.
Comparable ownership
Top 5
Commodore Capital LP
9.9%
RA CAPITAL MANAGEMENT, L.P.
9.5%
Alexander Schornstein
3.5%
GILEAD SCIENCES, INC.
14%
VANGUARD GROUP INC
1.6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Commodore Capital LP |
13D/G
|
9.9%
|
$29,281,576
1,615,981 shares
|
$0 | 08 Aug 2025 |
| RA CAPITAL MANAGEMENT, L.P. |
13D/G
|
9.5%
|
$28,392,908
1,530,615 shares
|
$0 | 11 Aug 2025 |
| Alexander Schornstein |
3/4/5
13D/G
10%+ Owner
|
3.5%
from 13D/G
|
$10,812,478
728,113 shares
|
— | 22 Nov 2024 |
| GILEAD SCIENCES, INC. |
13F
Company
|
14%
|
$40,035,615
2,209,471 shares
|
— | 30 Jun 2025 |
| VANGUARD GROUP INC |
13F
Company
|
1.6%
|
$4,599,309
253,825 shares
|
— | 30 Jun 2025 |
| B Group, Inc. |
13F
Company
|
1.2%
|
$3,431,022
189,350 shares
|
— | 30 Jun 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
56
Shares
12,244,439
Rows available
56
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
33
Q3 2025 holders
56
Holder diff
23
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend