Granahan Investment Management, LLC

Position in RGEN — Repligen Corp

CIK 1026710 WALTHAM, MA

Position in RGEN

as of Mar 31, 2026 · filed May 15, 2026 Compact

Position Value

$10,244,802

-$1,553,445 QoQ

Shares Held

86,953

+20.8% QoQ

Ownership

0.154%

of shares outstanding

% of Portfolio

0.50%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

22 quarters on record

Voting authority Sole 89% Shared 0% None 11%

Healthcare · as of Mar 31, 2026

Granahan Investment Management, LLC holds $26,614,032 across 4 Medical Instruments & Supplies names. RGEN ranks #2 (38.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BLFS	Biolife Solutions Inc	722,057	$13,776,847
2	RGEN	Repligen Corp This page	86,953	$10,244,802
3	WRBY	Warby Parker Inc.	81,924	$1,726,138
4	AZTA	Azenta, Inc.	40,996	$866,245

22 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$10,244,802	86,953	+20.8%	Shares	Sole	2026-05-15
2025-12-31	$11,798,247	72,002	+3.0%	Shares	Sole	2026-02-17
2025-09-30	$9,339,656	69,871	-48.3%	Shares	Sole	2025-11-14
2025-06-30	$16,797,021	135,046	+33.4%	Shares	Sole	2025-08-14
2025-03-31	$12,876,306	101,197	-5.8%	Shares	Sole	2025-05-15
2024-12-31	$15,461,315	107,415	+21.7%	Shares	Sole	2025-02-14
2024-09-30	$13,134,109	88,255	-29.3%	Shares	Sole	2024-11-14
2024-03-31	$22,946,778	124,765	-3.8%	Shares	Sole	2024-05-15
2023-12-31	$23,317,542	129,686	-2.3%	Shares	Sole	2024-02-14
2023-09-30	$21,109,849	132,758	-11.9%	Shares	Sole	2023-11-14
2023-06-30	$21,328,207	150,772	+35.7%	Shares	Sole	2023-08-14
2023-03-31	$18,711,530	111,140	+3.2%	Shares	Sole	2023-05-15
2022-12-31	$18,228,930	107,666	+59.9%	Shares	Sole	2023-02-14
2022-09-30	$12,596,619	67,322	-45.5%	Shares	Sole	2022-11-14
2022-06-30	$20,043,732	123,422	+425.8%	Shares	Sole	2022-08-15
2022-03-31	$4,415,412	23,475	+490.4%	Shares	Sole	2022-05-16
2021-06-30	$793,689	3,976	-89.1%	Shares	Sole	2021-08-16
2021-03-31	$7,101,408	36,528	+36.9%	Shares	Sole	2021-05-17
2020-12-31	$5,112,880	26,681	-79.5%	Shares	Sole	2021-02-12
2020-09-30	$19,172,823	129,950	-22.3%	Shares	Sole	2020-11-12
2020-06-30	$20,671,423	167,231	-17.7%	Shares	Sole	2020-08-14
2020-03-31	$19,608,625	203,114	—	Shares	Sole	2020-05-12
No filing history on record for this holder in this stock.