LOOMIS SAYLES & CO L P

Position in RGEN — Repligen Corp

CIK 312348 BOSTON, MA

Position in RGEN

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$17,977,564

-$6,564,894 QoQ

Shares Held

152,585

+1.9% QoQ

Ownership

0.271%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

11 quarters on record

Voting authority Sole 97.95130582953763.ToString("F0")% Shared 0.ToString("F0")% None 2.0486941704623653.ToString("F0")%

Healthcare · as of Mar 31, 2026

LOOMIS SAYLES & CO L P holds $812,074,652 across 5 Medical Instruments & Supplies names. RGEN ranks #2 (2.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ISRG	Intuitive Surgical Inc	1,699,693	$783,541,475
2	RGEN	Repligen Corp This page	152,585	$17,977,564
3	AVTR	Avantor, Inc.	1,241,432	$9,732,826
4	STVN	Stevanato Group S.p.A.	57,904	$796,180
5	HOLX	HOLOGIC INC	352	$26,607

11 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
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.