LOOMIS SAYLES & CO L P

Position in RGEN — Repligen Corp

CIK 312348 BOSTON, MA

Position in RGEN

as of Jun 30, 2026 · filed Aug 14, 2026 Compact

Position Value

$20,285,353

+$2,307,789 QoQ

Shares Held

148,676

-2.6% QoQ

Ownership

0.263%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

#76

of 476 holders

Holding Since

Mar 2020

12 quarters on record

Voting authority Sole 98% Shared 0% None 2%

Healthcare · as of Jun 30, 2026

LOOMIS SAYLES & CO L P holds $694,039,405 across 4 Medical Instruments & Supplies names. RGEN ranks #2 (2.9% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ISRG	Intuitive Surgical Inc	1,656,156	$658,620,117
2	RGEN	Repligen Corp This page	148,676	$20,285,353
3	AVTR	Avantor, Inc.	1,473,525	$14,587,896
4	WST	West Pharmaceutical Services Inc	1,521	$546,039

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$20,285,353	148,676	-2.6%	Shares	Defined	2026-08-14
2026-03-31	$17,977,564	152,585	+1.9%	Shares	Defined	2026-05-14
2025-12-31	$24,542,458	149,777	-10.9%	Shares	Defined	2026-02-12
2025-09-30	$22,463,377	168,051	+60.3%	Shares	Defined	2025-11-13
2025-06-30	$13,040,745	104,846	+953045.5%	Shares	Defined	2025-08-13
2022-06-30	$1,786	11	0.0%	Shares	Defined	2022-08-05
2022-03-31	$2,068	11	-81.0%	Shares	Defined	2022-05-13
2021-03-31	$11,275	58	-100.0%	Shares	Defined	2021-05-17
2020-12-31	$54,763,637	285,778	-16.4%	Shares	Defined	2021-02-12
2020-09-30	$50,445,696	341,912	+1.9%	Shares	Defined	2020-11-12
2020-06-30	$41,461,265	335,420	+9.5%	Shares	Defined	2020-08-14
2020-03-31	$29,569,139	306,289	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.