MPM Asset Management’s Dyne Therapeutics DYN Stock Holding History

MPM Asset Management’s Portfolio DYN Stock Details DYN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	$8.63M	Hold	682,376	–	–	19.4%	2
2025 Q2	$6.5M	Hold	682,376	–	–	14.99%	2
2025 Q1	$7.14M	Hold	682,376	–	–	10.28%	3
2024 Q4	$16.1M	Hold	682,376	–	–	12.92%	3
2024 Q3	$24.5M	Sell	682,376 -879,120	-56%	-$35M	16.87%	3
2024 Q2	$55.1M	Sell	1,561,496 -1,889,807	-55%	-$54.9M	30.26%	2
2024 Q1	$98M	Sell	3,451,303 -1,500,000	-30%	-$33.9M	39.97%	1
2023 Q4	$65.9M	Hold	4,951,303	–	–	32.36%	2
2023 Q3	$44.4M	Hold	4,951,303	–	–	23.76%	2
2023 Q2	$55.7M	Hold	4,951,303	–	–	27.32%	2
2023 Q1	$57M	Hold	4,951,303	–	–	23.77%	2
2022 Q4	$57.4M	Hold	4,951,303	–	–	24.01%	2
2022 Q3	$62.9M	Hold	4,951,303	–	–	23.95%	2
2022 Q2	$34M	Hold	4,951,303	–	–	14.35%	3
2022 Q1	$47.7M	Hold	4,951,303	–	–	16.31%	2
2021 Q4	$58.9M	Hold	4,951,303	–	–	12.72%	3
2021 Q3	$80.4M	Hold	4,951,303	–	–	18.64%	2
2021 Q2	$104M	Hold	4,951,303	–	–	19.37%	1
2021 Q1	$76.9M	Hold	4,951,303	–	–	14.86%	4
2020 Q4	$104M	Hold	4,951,303	–	–	14.71%	3
2020 Q3	$100M	Buy	+4,951,303	New	+$109M	18.64%	1

Other funds holding DYN

Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

AVLSA

Atlas Venture Life Science Advisors Cambridge, Massachusetts $881M AUM 160.77% 1-Year Est. Return

FIS

FCPM III Services Naarden, Netherlands $750M AUM 127.27% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Siren LLC Greenwich, Connecticut $4.94B AUM 244.43% 1-Year Est. Return

TCM

TCG Crossover Management Palo Alto, California $4.16B AUM 983.43% 1-Year Est. Return

Adage Capital Partners Boston, Massachusetts $71.3B AUM 56.8% 1-Year Est. Return

MPM Asset Management's DYN Position: Q3 2025 in Review

MPM Asset Management held its Dyne Therapeutics (DYN) position steady in Q3 2025 at 682,376 shares worth $8.63M. The position accounts for 19.4% of the portfolio, ranked #2.

MPM Asset Management first reported a position in DYN in Q3 2020 and has held it in 21 quarters since. The position peaked at $104M in Q2 2021. 207 funds tracked by Wall St. Rank hold DYN as of Q3 2025.

MPM Asset Management held 682,376 shares of Dyne Therapeutics worth $8.63M as of Q3 2025.
MPM Asset Management left its Dyne Therapeutics share count unchanged in Q3 2025.
Dyne Therapeutics made up 19.4% of MPM Asset Management's portfolio in Q3 2025, its #2 holding.
MPM Asset Management first reported a position in Dyne Therapeutics in Q3 2020 and has held it in 21 quarters since.
MPM Asset Management's Dyne Therapeutics position peaked at $104M in Q2 2021.
207 funds tracked by Wall St. Rank held Dyne Therapeutics as of Q3 2025.

Based on MPM Asset Management's 13F filing for Q3 2025, filed 14 Nov 2025.