Janus Henderson Group Plc

13F Holdings History for Dyne Therapeutics, Inc. - Common Stock (DYN)

Symbol: DYN on Nasdaq
Investment type: Equity / Common Stock
Latest Disclosed Ownership: 14.4M shares
Security Ownership: 10.1%

Shares, Excluding Options vs Price

Value, Excluding Options

JANUS HENDERSON GROUP PLC ownership in Dyne Therapeutics, Inc. Common Stock (DYN)

2025-08-07 - JANUS HENDERSON GROUP PLC has filed an SCHEDULE 13G/A form with the Securities and Exchange Commission (SEC) disclosing ownership of 14.4M shares of Dyne Therapeutics, Inc. Common Stock (DYN). This represents 10.1% percent ownership of the company. In their previous filing dated 2025-05-14, JANUS HENDERSON GROUP PLC had reported owning 10.4M shares, indicating an increase of 39% percent.

Reporting Name	Ownership %	Change	Value $	Shares owned	Change	Activity %	Price	Form	Report date	Filed at
JANUS HENDERSON GROUP PLC	10.1%	+10%	$181M	14.4M	+4,041,124	+39%	$12.56	13G/A	7/31/2025	7 Aug 2025 10:34:49
JANUS HENDERSON GROUP PLC	9.2%	+27.1%	$78.2M	10.4M	+2,974,566	+40.3%	$7.55	13G/A	3/31/2025	14 May 2025 12:16:34
JANUS HENDERSON GROUP PLC	7.3%		$55.7M	7.38M			$7.55	13G/A	12/31/2024	14 Feb 2025 12:22:47

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
6/30/2025	0.04%	0%	$89.9M	9.44M	-915,454	-8.84%	$9.52	Q2 2025
3/31/2025	0.07%	+0.02%	$118M	10.4M	+2,974,107		$11.44	Q1 2025
12/31/2024	0.09%	+0.01%	$174M	7.38M	+566,146	+8.31%	$23.55	Q4 2024
9/30/2024	0.13%	+0.04%	$245M	6.81M	+2,189,339	+47.3%	$35.92	Q3 2024
6/30/2024	0.09%	+0.04%	$163M	4.62M	+1,948,584	+72.8%	$35.30	Q2 2024
3/31/2024	0.04%	+0.05%	$75.9M	2.68M	+2,663,910	+23512%	$28.38	Q1 2024
12/31/2023	0%		$151K	11.3K	-34	-0.3%	$13.31	Q4 2023
9/30/2023	0%		$102K	11.4K	+14	+0.12%	$8.95	Q3 2023
6/30/2023	0%		$128K	11.4K	+11	+0.1%	$11.26	Q2 2023
3/31/2023	0%	+0%	$130K	11.3K	+11,339	NEW	$11.51	Q1 2023
12/31/2022		-0.01%	$0	0	-765,953	-100%		Q4 2022
9/30/2022	0.01%	0%	$9.73M	766K	-294,348	-27.8%	$12.70	Q3 2022
6/30/2022	0.01%	0%	$7.29M	1.06M	-122,405	-10.3%	$6.88	Q2 2022
3/31/2022	0.01%	+0%	$11.4M	1.18M	+600,408	+103%	$9.63	Q1 2022
12/31/2021	0%	+0%	$6.92M	582K	+23,815	+4.26%	$11.89	Q4 2021
9/30/2021	0%	0%	$9.07M	558K	-8,683	-1.53%	$16.24	Q3 2021
6/30/2021	0.01%	0%	$11.9M	567K	-296,908	-34.4%	$21.04	Q2 2021
3/31/2021	0.01%	+0%	$13.4M	864K	+234,222	+37.2%	$15.53	Q1 2021
12/31/2020	0.01%	0%	$13.2M	630K	-356,111	-36.1%	$21.00	Q4 2020
9/30/2020	0.01%	+0.01%	$19.9M	986K	+985,963	NEW	$20.20	Q3 2020

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.