Security key
81750R102
Seres Therapeutics, Inc. - COMMON STOCK (MCRB)
CUSIP: 81750R102
Q1 2021 13F Holders as of 31 Mar 2021
- Security type / class
- Equity / COMMON STOCK
- Total 13F shares
- 74,799,926
- Total 13F value
- $1,540,145,276
- Share change
- +3,663,111
- Put/Call ratio
- 15%
- SEC-reported price per share
- $20.59
- Number of holders
- 148
- Value change
- +$72,736,725
- Number of buys
- 84
- Number of sells
- 62
- Shares outstanding
- 170,403,883
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 2021
Institutions
148
Top holders
10
MCRB full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2025
Seres Therapeutics, Inc. SEC filings
Seres Therapeutics, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 81750R102
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
ARK Investment Management...
Disclosed value leader
ARK Investment Management...
Comparable rows
0/15
Latest evidence
31 Dec 2020
13F
Highest disclosed value: $336,661,000
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
ARK Investment Management LLC has the largest disclosed position value at $336.66M.
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 ARK Investment Management LLC's linked filing trail.
Disclosed position value
Top 5
ARK Investment Management LLC
$336.66M
FMR LLC
$277.75M
BlackRock Finance, Inc.
$153.71M
Amova Asset Management Americas, ...
$142.68M
Sumitomo Mitsui Trust Group, Inc.
$142.68M
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 |
|---|---|---|---|---|---|
| ARK Investment Management LLC |
13F
Company
|
—
denominator unverified
|
$336,661,000
13,741,254 shares
|
— | 31 Dec 2020 |
| FMR LLC |
13F
Company
|
—
denominator unverified
|
$277,746,000
11,336,573 shares
|
— | 31 Dec 2020 |
| BlackRock Finance, Inc. |
13F
Company
|
—
denominator unverified
|
$153,710,000
6,273,836 shares
|
— | 31 Dec 2020 |
| Amova Asset Management Americas, Inc. |
13F
Company
|
—
denominator unverified
|
$142,678,000
5,823,603 shares
|
— | 31 Dec 2020 |
| Sumitomo Mitsui Trust Group, Inc. |
13F
Company
|
—
denominator unverified
|
$142,678,000
5,823,603 shares
|
— | 31 Dec 2020 |
| STATE STREET CORP |
13F
Company
|
—
denominator unverified
|
$88,741,000
3,622,072 shares
|
— | 31 Dec 2020 |
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 2021
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
148
Shares
74,799,926
Rows available
148
| 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 2021 vs Q3 2025 Across Filers
Q3 2025 holders
1
Q1 2021 holders
148
Holder diff
147
| Investor | Q3 2025 Shares | Q1 2021 Shares | Share Diff | Share Chg % | Q3 2025 value | Q1 2021 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend