Latest MPM ASSET MANAGEMENT LLC Stock Portfolio

$44.51Million | No. of Holdings #4

MPM ASSET MANAGEMENT LLC Performance

2025 Q3+5.48%

YTD-51.38%

2024+22.93%

About MPM ASSET MANAGEMENT LLC and 13F Hedge Fund Stock Holdings

MPM ASSET MANAGEMENT LLC is a hedge fund based in Boston, MA. On 2025-11-14, the fund reported it's updated stock portfolio. In the 13F Holdings report, MPM ASSET MANAGEMENT LLC reported an equity portfolio of $44.5 Millions as of 30 Sep, 2025. <br><br> The top stock holdings of MPM ASSET MANAGEMENT LLC are TRDA, DYN, HOWL. The fund has invested 57.1% of it's portfolio in ENTRADA THERAPEUTICS, INC. and 19.4% of portfolio in DYNE THERAPEUTICS, INC. <br><br> The fund managers got completely rid off ADAPTIMMUNE THERAPEUTICS PLC (ADAP) stocks.

MPM ASSET MANAGEMENT LLC Equity Portfolio Value

Last Reported on: 14 Nov, 2025

$44.51Million

as of Nov 14, 2025

MPM ASSET MANAGEMENT LLC Annual Return Estimates Vs S&P 500

Our best estimate is that MPM ASSET MANAGEMENT LLC made a return of 5.48% in the last quarter. In trailing 12 months, it's portfolio return was -57.86%.

Performance
S&P 500

New Buys

No new stocks were added by MPM ASSET MANAGEMENT LLC

Additions

No additions were made to existing positions by MPM ASSET MANAGEMENT LLC

Reductions

None of the existing positions were reduced by MPM ASSET MANAGEMENT LLC

Sold off

Ticker	$ Sold
adaptimmune therapeutics plc	-1,152,880

MPM ASSET MANAGEMENT LLC got rid off the above stocks

Sector Distribution

MPM ASSET MANAGEMENT LLC has about 100% of it's holdings in Healthcare sector.

Healthcare

Sector	%
Healthcare	100

Market Cap. Distribution

MPM ASSET MANAGEMENT LLC has about 0% of it's portfolio invested in the large-cap and mega-cap stocks.

SMALL-CAP
MICRO-CAP
MID-CAP

Category	%
SMALL-CAP	57.1
MICRO-CAP	23.5
MID-CAP	19.4

Stocks belong to which Index?

About 76.5% of the stocks held by MPM ASSET MANAGEMENT LLC either belong to S&P 500 or RUSSELL 2000 index.

RUSSELL 2000
Others

Index	%
RUSSELL 2000	76.5
Others	23.5

Top 5 Winners (%)		%
HOWL	werewolf therapeutics, inc.	80.7 %
DYN	dyne therapeutics, inc.	32.9 %
RPTX	repare therapeutics, inc.	26.6 %

Top 5 Winners ($)		$
HOWL	werewolf therapeutics, inc.	3.8 M
DYN	dyne therapeutics, inc.	2.1 M
RPTX	repare therapeutics, inc.	0.4 M

Top 5 Losers (%)		%
TRDA	entrada therapeutics, inc.	-13.7 %

Top 5 Losers ($)		$
TRDA	entrada therapeutics, inc.	-4.0 M

MPM ASSET MANAGEMENT LLC Holdings Map

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

Current Stock Holdings of MPM ASSET MANAGEMENT LLC

MPM ASSET MANAGEMENT LLC has 4 stocks in it's portfolio. TRDA proved to be the most loss making stock for the portfolio. HOWL was the most profitable stock for MPM ASSET MANAGEMENT LLC last quarter.

$44.51MTotal Value

5.00Positions

14 Nov, 2025Last Reported

Current holdings of Current Stock Holdings of MPM ASSET MANAGEMENT LLC, last reported on 14 Nov, 2025. Select a row with a linked ticker to view its historical trend.
Holdingsorted ascending	% Portfolio	Shares Held	$ Value	% Change
ADAP Adaptimmune Therapeutics Plc Adaptimmune Therapeutics PlcADAP MPM ASSET MANAGEMENT LLC's holding in Adaptimmune Therapeutics Plc over time	0%	0.00	$0.00 0%	decreased 100 percentsold off

DYN Dyne Therapeutics, Inc. Dyne Therapeutics, Inc.DYN MPM ASSET MANAGEMENT LLC's holding in Dyne Therapeutics, Inc. over time	19.4%	682,376	$8.63M 19.4%	unchanged 0 percentunchanged

HOWL Werewolf Therapeutics, Inc. Werewolf Therapeutics, Inc.HOWL MPM ASSET MANAGEMENT LLC's holding in Werewolf Therapeutics, Inc. over time	19.08%	4,309,860	$8.49M 19.08%	unchanged 0 percentunchanged

RPTX Repare Therapeutics, Inc. Repare Therapeutics, Inc.RPTX MPM ASSET MANAGEMENT LLC's holding in Repare Therapeutics, Inc. over time	4.43%	1,121,320	$1.97M 4.43%	unchanged 0 percentunchanged

TRDA Entrada Therapeutics, Inc. Entrada Therapeutics, Inc.TRDA MPM ASSET MANAGEMENT LLC's holding in Entrada Therapeutics, Inc. over time	57.09%	4,381,060	$25.41M 57.09%	unchanged 0 percentunchanged