NORTH STAR ASSET MANAGEMENT INC

Position in RGEN — Repligen Corp

CIK 1056559 NEENAH, WI

Position in RGEN

as of Mar 31, 2026 · filed May 6, 2026 Compact

Position Value

$9,892,520

-$4,019,685 QoQ

Shares Held

83,963

-1.1% QoQ

Ownership

0.149%

of shares outstanding

% of Portfolio

0.56%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Healthcare · as of Mar 31, 2026

NORTH STAR ASSET MANAGEMENT INC holds $32,789,753 across 5 Medical Instruments & Supplies names. RGEN ranks #2 (30.2% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	ISRG	Intuitive Surgical Inc	23,747	$10,947,128
2	RGEN	Repligen Corp This page	83,963	$9,892,520
3	HOLX	HOLOGIC INC	102,412	$7,741,323
4	RMD	Resmed Inc	12,450	$2,794,776
5	AVTR	Avantor, Inc.	180,358	$1,414,006

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$9,892,520	83,963	-1.1%	Shares	Sole	2026-05-06
2025-12-31	$13,912,205	84,903	-0.6%	Shares	Sole	2026-02-09
2025-09-30	$11,420,631	85,439	-2.5%	Shares	Sole	2025-11-10
2025-06-30	$10,895,936	87,602	-2.4%	Shares	Sole	2025-08-12
2025-03-31	$11,425,261	89,793	-0.4%	Shares	Sole	2025-05-08
2024-12-31	$12,972,880	90,127	-2.2%	Shares	Sole	2025-02-19
2024-09-30	$13,710,786	92,130	-1.7%	Shares	Sole	2024-11-14
2024-06-30	$11,814,846	93,724	+1.6%	Shares	Sole	2024-08-05
2024-03-31	$16,958,526	92,206	+0.6%	Shares	Sole	2024-05-08
2023-12-31	$16,479,748	91,656	-0.0%	Shares	Sole	2024-02-01
2023-09-30	$14,580,739	91,697	+0.4%	Shares	Sole	2023-10-26
2023-06-30	$12,918,409	91,322	+2.6%	Shares	Sole	2023-08-09
2023-03-31	$14,983,365	88,996	+2.2%	Shares	Sole	2023-05-10
2022-12-31	$14,743,514	87,080	+3.0%	Shares	Sole	2023-03-06
2022-09-30	$15,817,530	84,536	+1.7%	Shares	Sole	2022-11-08
2022-06-30	$13,499,175	83,123	+0.5%	Shares	Sole	2022-07-28
2022-03-31	$15,552,785	82,688	+1.4%	Shares	Sole	2022-04-29
2021-12-31	$21,595,847	81,543	-2.4%	Shares	Sole	2022-02-07
2021-09-30	$24,142,513	83,541	-6.8%	Shares	Sole	2021-10-20
2021-06-30	$17,890,542	89,623	-0.9%	Shares	Sole	2021-07-30
2021-03-31	$17,587,300	90,465	-5.9%	Shares	Sole	2021-04-29
2020-12-31	$18,416,600	96,105	-2.7%	Shares	Sole	2021-02-16
2020-09-30	$14,567,066	98,733	-7.7%	Shares	Sole	2020-11-02
2020-06-30	$13,226,887	107,005	-14.1%	Shares	Sole	2020-07-28
2020-03-31	$12,019,133	124,499	—	Shares	Sole	2020-04-24
No filing history on record for this holder in this stock.