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Latest Flagship Pioneering Inc. Stock Portfolio

Flagship Pioneering Inc. Performance:
2025 Q3: 9%YTD: -4.99%2024: -55.33%

Performance for 2025 Q3 is 9%, and YTD is -4.99%, and 2024 is -55.33%.

About Flagship Pioneering Inc. and 13F Hedge Fund Stock Holdings

In it's latest 13F Holdings report, Flagship Pioneering Inc. reported an equity portfolio of $292.6 Millions as of 30 Sep, 2025.

The top stock holdings of Flagship Pioneering Inc. are MRNA, SANA, FHTX. The fund has invested 40.9% of it's portfolio in MODERNA INC and 30.3% of portfolio in SANA BIOTECHNOLOGY INC.

Flagship Pioneering Inc. Annual Return Estimates Vs S&P 500

Our best estimate is that Flagship Pioneering Inc. made a return of 9% in the last quarter. In trailing 12 months, it's portfolio return was -46.1%.

New Buys

No new stocks were added by Flagship Pioneering Inc.

Additions

No additions were made to existing positions by Flagship Pioneering Inc.

Reductions

None of the existing positions were reduced by Flagship Pioneering Inc.

Sold off

None of the stocks were completely sold off by Flagship Pioneering Inc.

Sector Distribution

Flagship Pioneering Inc. has about 100% of it's holdings in Healthcare sector.

Sector%
Healthcare100

Market Cap. Distribution

Flagship Pioneering Inc. has about 40.9% of it's portfolio invested in the large-cap and mega-cap stocks.

Category%
LARGE-CAP40.9
SMALL-CAP30.3
MICRO-CAP28.8

Stocks belong to which Index?

About 100% of the stocks held by Flagship Pioneering Inc. either belong to S&P 500 or RUSSELL 2000 index.

Index%
RUSSELL 200059.1
S&P 50040.9
Top 5 Winners (%)%
MCRB
seres therapeutics inc
73.2 %
SANA
sana biotechnology inc
30.0 %
FHTX
foghorn therapeutics inc
4.0 %
Top 5 Winners ($)$
SANA
sana biotechnology inc
20.5 M
MCRB
seres therapeutics inc
9.4 M
FHTX
foghorn therapeutics inc
2.4 M
Top 5 Losers (%)%
MRNA
moderna inc
-6.4 %
Top 5 Losers ($)$
MRNA
moderna inc
-8.2 M

Flagship Pioneering Inc. Holdings Map

This heatmap illustrates the top 50 positions within the fund's portfolio.

Current Stock Holdings of Flagship Pioneering Inc.

Flagship Pioneering Inc. has 4 stocks in it's portfolio. MRNA proved to be the most loss making stock for the portfolio. SANA was the most profitable stock for Flagship Pioneering Inc. last quarter.

Last Reported on: 14 Nov, 2025
TickerNamesorted ascending% PortfolioShares Held$ ValueType% ChangeOptions