GW&K Investment Management, LLC

Position in SUPN — Supernus Pharmaceuticals, Inc.

CIK 1082917 BOSTON, MA

Back to SUPN Full portfolio

Position in SUPN

as of Mar 31, 2026 · filed May 13, 2026 Compact

Position Value

$54,542,460

+$830,876 QoQ

Shares Held

1,055,184

-2.4% QoQ

Ownership

1.82%

of shares outstanding

% of Portfolio

0.49%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Jun 2020

24 quarters on record

Voting authority Sole 94.0651109190435.ToString("F0")% Shared 5.894137894433578.ToString("F0")% None 0.04075118652291923.ToString("F0")%

Common Shares in SUPN Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

GW&K Investment Management, LLC holds $163,730,959 across 8 Drug Manufacturers - Specialty & Generic names. SUPN ranks #2 (33.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NBIX	Neurocrine Biosciences Inc	593,725	$78,217,331
2	SUPN	Supernus Pharmaceuticals, Inc. This page	1,055,184	$54,542,460
3	BCRX	Biocryst Pharmaceuticals Inc	3,240,462	$30,849,197
4	VTRS	Viatris Inc	2,967	$40,084
5	HLN	Haleon plc	3,869	$38,728
6	ZTS	Zoetis Inc.	208	$24,587
7	TAK	Takeda Pharmaceutical Co Ltd	580	$10,741
8	TEVA	Teva Pharmaceutical Industries Ltd	260	$7,831

All Filings in SUPN

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24 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$54,542,460	1,055,184	-2.4%	Shares	Sole	2026-05-13
2025-12-31	$53,711,584	1,080,716	+0.0%	Shares	Sole	2026-02-11
2025-09-30	$51,638,910	1,080,538	-14.6%	Shares	Sole	2025-11-12
2025-06-30	$39,866,684	1,264,806	-8.5%	Shares	Sole	2025-08-11
2025-03-31	$45,274,942	1,382,441	+14.6%	Shares	Sole	2025-05-05
2024-12-31	$43,621,615	1,206,350	-2.6%	Shares	Sole	2025-02-05
2024-09-30	$38,601,307	1,238,015	-4.3%	Shares	Sole	2024-11-07
2024-06-30	$34,596,176	1,293,315	-3.4%	Shares	Sole	2024-08-12
2024-03-31	$45,688,365	1,339,442	+1.7%	Shares	Sole	2024-05-08
2023-12-31	$38,129,202	1,317,526	-6.3%	Shares	Sole	2024-02-09
2023-09-30	$38,767,775	1,406,158	+0.5%	Shares	Sole	2023-11-09
2023-06-30	$42,061,604	1,399,255	-1.2%	Shares	Sole	2023-08-09
2023-03-31	$51,305,447	1,416,104	+0.7%	Shares	Sole	2023-05-09
2022-12-31	$50,170,853	1,406,528	-20.4%	Shares	Sole	2023-02-10
2022-09-30	$59,829,502	1,767,489	-7.5%	Shares	Sole	2022-11-09
2022-06-30	$55,232,833	1,909,849	+4.5%	Shares	Sole	2022-08-09
2022-03-31	$59,051,580	1,827,091	-0.5%	Shares	Sole	2022-05-09
2021-12-31	$53,551,348	1,836,466	+13.0%	Shares	Sole	2022-02-11
2021-09-30	$43,351,817	1,625,490	+0.6%	Shares	Sole	2021-11-10
2021-06-30	$49,759,718	1,616,100	+2.7%	Shares	Sole	2021-08-10
2021-03-31	$41,191,899	1,573,411	+19.4%	Shares	Sole	2021-05-11
2020-12-31	$33,144,273	1,317,340	+25.5%	Shares	Sole	2021-02-05
2020-09-30	$21,879,665	1,049,888	+32.8%	Shares	Sole	2020-11-10
2020-06-30	$18,781,523	790,801	—	Shares	Sole	2020-08-06
No filing history on record for this holder in this stock.