Security key
045396108
ASSEMBLY BIOSCIENCES, INC. - Common Stock, par value $0.001 (ASMB)
CUSIP: 045396108
Q1 2020 13F Holders as of 31 Mar 2020
- Security type / class
- Equity / Common Stock, par value $0.001
- Total 13F shares
- 28,961,280
- Total 13F value
- $429,566,715
- Share change
- +833,976
- Put/Call ratio
- 117%
- SEC-reported price per share
- $14.83
- Number of holders
- 96
- Value change
- +$7,108,278
- Number of buys
- 51
- Number of sells
- 46
- Shares outstanding
- 19,829,040
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2020
Institutions
96
Top holders
10
ASMB full security history
Ownership snapshot
Full 13F holder table
ASSEMBLY BIOSCIENCES, INC. SEC filings
ASSEMBLY BIOSCIENCES, INC. company facts
Broader feeds
Ownership snapshot
Top reported holders of ASMB - ASSEMBLY BIOSCIENCES, INC. - Common Stock, par value $0.001 (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
EcoR1 Capital, LLC
Disclosed value leader
EcoR1 Capital, LLC
Comparable rows
0/15
Latest evidence
31 Dec 2019
13F
Highest disclosed value: $48,864,000
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
EcoR1 Capital, LLC has the largest disclosed position value at $48.86M.
0 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 EcoR1 Capital, LLC's linked filing trail.
Disclosed position value
Top 5
EcoR1 Capital, LLC
$48.86M
JENNISON ASSOCIATES LLC
$48.01M
BlackRock Finance, Inc.
$40.66M
Consonance Capital Management LP
$38.43M
BAKER BROS. ADVISORS LP
$31.54M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| EcoR1 Capital, LLC |
13F
Company
|
—
denominator unverified
|
$48,864,000
2,388,268 shares
|
— | 31 Dec 2019 |
| JENNISON ASSOCIATES LLC |
13F
Company
|
—
denominator unverified
|
$48,010,000
2,346,510 shares
|
— | 31 Dec 2019 |
| BlackRock Finance, Inc. |
13F
Company
|
—
denominator unverified
|
$40,658,000
1,987,218 shares
|
— | 31 Dec 2019 |
| Consonance Capital Management LP |
13F
Company
|
—
denominator unverified
|
$38,432,000
1,878,395 shares
|
— | 31 Dec 2019 |
| BAKER BROS. ADVISORS LP |
13F
Company
|
—
denominator unverified
|
$31,542,000
1,541,618 shares
|
— | 31 Dec 2019 |
| WELLINGTON MANAGEMENT GROUP LLP |
13F
Company
|
—
denominator unverified
|
$31,127,000
1,521,394 shares
|
— | 31 Dec 2019 |
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 Q1 2020
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
96
Shares
28,961,280
Rows available
96
| 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 Q1 2020 vs Q1 2020 Across Filers
Q1 2020 holders
96
Q1 2020 holders
96
Holder diff
0
| Investor | Q1 2020 Shares | Q1 2020 Shares | Share Diff | Share Chg % | Q1 2020 value | Q1 2020 value | Value change | Value Chg % |
|---|