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Seres Therapeutics Ownership | Who Owns Seres Therapeutics?

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Seres Therapeutics Ownership Summary

Seres Therapeutics is owned by 26.13% institutional investors, 12.97% insiders, and 60.89% retail investors. Fmr is the largest institutional shareholder, holding 14.29% of MCRB shares. Fidelity Growth Compy Commingled Pl O is the top mutual fund, with 5.55% of its assets in Seres Therapeutics shares.

MCRB Ownership Benchmark

TypeName% Inst% Insiders% Retail
StockSeres Therapeutics26.13%12.97%60.89%
SectorHealthcare Stocks 488.30%11.08%-399.38%
IndustryBiotech Stocks 307.10%11.11%-218.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

HolderShares% HoldingValue
Fmr21.81M14.29%$18.13M
Blackrock1.76M1.21%$1.28M
Vontobel98.51K1.13%$1.90M
Marshall wace, llp91.41K1.05%$1.02M
Xtx topco22.42K0.26%$249.05K
Susquehanna group, llp327.81K0.21%$272.41K
Morgan stanley171.09K0.12%$123.83K
Bank of america corp /de/105.04K0.07%$75.94K
Rhumbline advisers55.11K0.04%$39.90K
Goldman sachs group52.95K0.03%$44.00K

Top Institutional Shareholders by % of Total Assets

HolderShares% AssetsValue
Xtx topco22.42K0.01%$249.05K
Vontobel98.51K0.01%$1.90M
Fmr21.81M0.00%$18.13M
Marshall wace, llp91.41K0.00%$1.02M
Physician wealth advisors142.000.00%$1.58K
Atlantic union bankshares411.000.00%$4.57K
Proshare advisors---
Voya investment management---
Evercore wealth management---
Legal & general group---

Top Buyers

HolderShares% AssetsChange
Marshall wace, llp91.41K0.00%91.41K
Goldman sachs group52.95K-38.28K
Xtx topco22.42K0.01%22.42K
Vontobel98.51K0.01%18.19K
Macquarie group4.95K-4.95K

Top Sellers

HolderShares% AssetsChange
Flagship pioneering---23.12M
Vanguard group---6.09M
Blackrock1.76M--5.06M
Woodline partners lp---2.05M
Millennium management29.55K--1.78M

New Positions

HolderShares% AssetsChangeValue
Marshall wace, llp91.41K0.00%91.41K$1.02M
Xtx topco22.42K0.01%22.42K$249.05K
Macquarie group4.95K-4.95K$3.58K
Atlantic union bankshares411.000.00%411.00$4.57K
Physician wealth advisors142.000.00%142.00$1.58K

Sold Out

HolderChange
Headlands-10.00
Point72 (difc)-17.00
Nelson, van denburg & campbell wealth management group-20.00
Whittier trust-30.00
Jones financial companies lllp-49.00

Institutional Ownership Trends

DateHoldingsChange %SharesChange %OwnershipChange %Increased PositionChange %Decreased PositionChange %
Jun 30, 202536-44.62%2,284,946-96.28%262.10%13-35.00%2116.67%
Mar 31, 20253-96.00%23,487,356-62.76%130.79%--100.00%1-94.44%
Dec 31, 202470-13.58%62,481,139-1.44%402.37%25-3.85%17-34.62%
Sep 30, 202481-14.74%63,396,268-8.26%411.86%27-41.30%26-3.70%
Jun 30, 202495-5.94%69,106,531-19.34%471.06%46-2.13%27-3.57%

Top Mutual Funds Shareholders

HolderShares% HoldingChange
Fidelity Growth Compy Commingled Pl O9.44M5.55%92.60K
Vanguard US Total Market Shares ETF4.04M2.32%-
Vanguard Total Stock Mkt Idx Inv188.70K2.16%-4.12K
Fidelity Growth Compy Commingled Pl S108.78K1.25%-73.89K
Vanguard Institutional Extnd Mkt Idx Tr77.12K0.88%-13.61K
Vanguard Explorer Inv1.22M0.72%-
LUX IM Global Medtech HX48.10K0.55%-
Fidelity Select Biotechnology854.35K0.50%-
Fidelity Extended Market Index38.86K0.44%-320.00
Fidelity Series Growth Company38.18K0.44%-22.70K

Recent Insider Transactions

DateNameRoleActivityValue
Aug 18, 2025Shaff Eric D.-Sell$3.61K
Aug 18, 2025DesRosier Thomas See RemarksSell$1.27K
Aug 18, 2025Henn Matthew R See RemarksSell$1.22K
Aug 18, 2025Young Teresa L. See RemarksSell$982.35
May 16, 2025Young Teresa L. See RemarksSell$458.64

Insider Transactions Trends

DateBuySell
2025 Q3-4
2025 Q2-4
2025 Q1-5
2024 Q4-10
2024 Q3-7

MCRB Ownership FAQ

Who Owns Seres Therapeutics?

Seres Therapeutics shareholders are primarily institutional investors at 26.13%, followed by 12.97% insiders and 60.90% retail investors. The average institutional ownership in Seres Therapeutics's industry, Biotech Stocks , is 307.10%, which Seres Therapeutics falls below.

Who owns the most shares of Seres Therapeutics?

Seres Therapeutics’s largest shareholders are Fmr (21.81M shares, 14.29%), Blackrock (1.76M shares, 1.21%), and Vontobel (98.51K shares, 1.13%). Together, they hold 16.62% of Seres Therapeutics’s total shares outstanding.

Does Blackrock own Seres Therapeutics?

Yes, BlackRock owns 1.21% of Seres Therapeutics, totaling 1.76M shares as of Jun 2024. This represents 0% of BlackRock's total assets, with a market value of 1.28M$. In the last quarter, BlackRock decreased its holdings by -5.063M shares, a -74.18% change.

Who is Seres Therapeutics’s biggest shareholder by percentage of total assets invested?

Xtx topco is Seres Therapeutics’s biggest shareholder by percentage of total assets invested, with 0.01% of its assets in 22.42K Seres Therapeutics shares, valued at 249.05K$.

Who is the top mutual fund holder of Seres Therapeutics shares?

Fidelity Growth Compy Commingled Pl O is the top mutual fund holder of Seres Therapeutics shares, with 5.55% of its total shares outstanding invested in 9.44M Seres Therapeutics shares.

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