Security key
81750R201
Seres Therapeutics, Inc. - COMMON STOCK (MCRB)
CUSIP: 81750R201
Q2 2025 13F Holders as of 30 Jun 2025
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 2,284,946
- Total 13F value
- $25,385,817
- Share change
- +2,139,234
- Put/Call ratio
- 16%
- SEC-reported price per share
- $11.11
- Number of holders
- 33
- Value change
- +$24,555,434
- Number of buys
- 31
- Number of sells
- 4
- Shares outstanding
- 8,667,871
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q2 2025
Institutions
33
Top holders
10
MCRB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Previous quarter: Q1 2025
Seres Therapeutics, Inc. SEC filings
Seres Therapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 81750R201
Recent filing periods:
Ownership snapshot
Top reported holders of MCRB - Seres Therapeutics, Inc. - COMMON STOCK (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
FMR LLC
Disclosed value leader
Flagship Pioneering, LLC
Comparable rows
15/15
Latest evidence
31 Mar 2025
13F
13D/G
Lead comparable stake: 3.1%
13D/G row: FMR LLC
Showing 1-6 of 15 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 3.1%.
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.
Comparable ownership
Top 5
FMR LLC
3.1%
Flagship Pioneering, LLC
14%
VANGUARD GROUP INC
3.6%
BlackRock, Inc.
1%
GEODE CAPITAL MANAGEMENT, LLC
0.95%
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 |
|---|---|---|---|---|---|
| FMR LLC |
13F
13D/G
Company
|
3.1%
from 13D/G
|
$15,324,791
21,889,432 shares
|
— | 31 Mar 2025 |
| Flagship Pioneering, LLC |
13F
Company
|
14%
|
$16,184,242
23,117,045 shares
|
— | 31 Mar 2025 |
| VANGUARD GROUP INC |
13F
Company
|
3.6%
|
$4,264,399
6,091,999 shares
|
— | 31 Mar 2025 |
| BlackRock, Inc. |
13F
Company
|
1%
|
$1,233,686
1,762,157 shares
|
— | 31 Mar 2025 |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
Company
|
0.95%
|
$1,133,667
1,618,772 shares
|
— | 31 Mar 2025 |
| UBS Group AG |
13F
Company
|
0.85%
|
$1,019,313
1,456,161 shares
|
— | 31 Mar 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 Q2 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
33
Shares
2,284,946
Rows available
33
| 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 Q2 2025 vs Q1 2025 Across Filers
Q1 2025 holders
4
Q2 2025 holders
33
Holder diff
29
| Investor | Q1 2025 Shares | Q2 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q2 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend