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Of the 10 tracked institutions holding ASMB, 5 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +6.2pt. It's a gauge of who owns the name, not just how many.
Among the 10 tracked institutional investors we monitor, ASMB (ASSEMBLY BIOSCIENCES INC) is held with a combined value of $98.14M across 3,435,187 shares. The largest holder is RA CAPITAL MANAGEMENT, L.P. with a position worth $28.04M (0.24% of their portfolio). 2 funds opened new positions in the most recent quarter. 7 funds increased their holdings.
Total Institutional Value
$98.14M
Total Shares Held
3,435,187
Institutional Holders
10
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | RA CAPITAL MANAGEMENT, L.P. | $28.04M | 0.24% | - |
| 2 | BlackRock, Inc. | $21.07M | 0.00% | +278.2% |
| 3 | VANGUARD GROUP INC | $19.48M | 0.00% | +14.1% |
| 4 | Point72 Asset Management, L.P. | $12.66M | 0.02% | +33.9% |
| 5 | MILLENNIUM MANAGEMENT LLC | $8.21M | 0.01% | +27.9% |
| 6 | STATE STREET CORP | $4.72M | 0.00% | +203.3% |
| 7 | CITADEL ADVISORS LLC | $2.64M | 0.00% | +277.0% |
| 8 | RENAISSANCE TECHNOLOGIES LLC | $1.08M | 0.00% | +152.0% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $226.00K | 0.00% | New |
| 10 | FMR LLC | $4.89K | 0.00% | New |
As of the latest SEC 13F filings, RA CAPITAL MANAGEMENT, L.P. is the largest institutional holder of ASMB with a position worth $28.04M, representing 0.24% of their portfolio. In total, 10 institutional investors hold ASMB with a combined value of $98.14M.
In the most recent quarter, 2 funds opened a new position in ASMB. Additionally, 7 increased their holdings.
Institutional investors hold $98.14M worth of ASMB stock across 10 positions. The largest institutional holder is RA CAPITAL MANAGEMENT, L.P. with $28.04M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For ASMB, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their ASMB positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
None this quarter.
| 2026-08-13 |
| 8.1% | 2026-08-04 |
SEC Schedule 13D (activist) and 13G (passive) filings for ASMB. Filed when an investor acquires 5%+ ownership.
Last Close
$20.46
2026-10-21
YTD
-39.4%
2% of 52-week range
