Rock Springs Capital Management LP

Position in NBIX — Neurocrine Biosciences Inc

CIK 1595725 Baltimore, MD

Back to NBIX Full portfolio

Position in NBIX

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

Position Value

$19,820,283

+$2,020,618 QoQ

Shares Held

150,450

+19.9% QoQ

Ownership

0.150%

of shares outstanding

% of Portfolio

1.17%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Common Shares in NBIX Over Time

Shares Held

Position Value (USD)

Position in Drug Manufacturers - Specialty & Generic

Healthcare · as of Mar 31, 2026

Rock Springs Capital Management LP holds $43,551,047 across 7 Drug Manufacturers - Specialty & Generic names. NBIX ranks #1 (45.5% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NBIX	Neurocrine Biosciences Inc This page	150,450	$19,820,283
2	AMLX	Amylyx Pharmaceuticals, Inc.	499,764	$6,946,719
3	ALKS	Alkermes plc.	183,986	$6,505,744
4	INDV	Indivior Pharmaceuticals, Inc.	200,000	$6,096,000
5	TLPH	Talphera, Inc.	3,589,186	$2,691,889
6	TEVA	Teva Pharmaceutical Industries Ltd	45,500	$1,370,460
7	BCRX	Biocryst Pharmaceuticals Inc	12,600	$119,952

All Filings in NBIX

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25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$19,820,283	150,450	+19.9%	Shares	Sole	2026-05-15
2025-12-31	$17,799,665	125,500	+39.8%	Shares	Sole	2026-02-17
2025-09-30	$12,599,105	89,750	+1.1%	Shares	Sole	2025-11-14
2025-06-30	$11,161,272	88,800	-68.2%	Shares	Sole	2025-08-14
2025-03-31	$30,857,400	279,000	-61.3%	Shares	Sole	2025-05-15
2024-12-31	$98,348,250	720,500	-23.3%	Shares	Sole	2025-02-14
2024-09-30	$108,191,580	939,000	-0.1%	Shares	Sole	2024-11-14
2024-06-30	$129,409,800	940,000	-10.9%	Shares	Sole	2024-08-14
2024-03-31	$145,491,808	1,054,900	-11.8%	Shares	Sole	2024-05-15
2023-12-31	$157,584,960	1,196,000	-3.2%	Shares	Sole	2024-02-14
2023-09-30	$139,050,000	1,236,000	-3.4%	Shares	Sole	2023-11-14
2023-06-30	$120,656,850	1,279,500	+5.7%	Shares	Sole	2023-08-14
2023-03-31	$122,486,322	1,210,100	+7.8%	Shares	Sole	2023-05-15
2022-12-31	$134,071,400	1,122,500	0.0%	Shares	Sole	2023-02-14
2022-09-30	$119,220,725	1,122,500	0.0%	Shares	Sole	2022-11-14
2022-06-30	$109,421,300	1,122,500	+1.6%	Shares	Sole	2022-08-15
2022-03-31	$103,593,750	1,105,000	0.0%	Shares	Sole	2022-05-16
2021-12-31	$94,112,850	1,105,000	+5.1%	Shares	Sole	2022-02-14
2021-09-30	$100,849,365	1,051,500	+3.6%	Shares	Sole	2021-11-15
2021-06-30	$98,779,800	1,015,000	0.0%	Shares	Sole	2021-08-16
2021-03-31	$98,708,750	1,015,000	-35.6%	Shares	Sole	2021-05-17
2020-12-31	$150,963,750	1,575,000	+7.5%	Shares	Sole	2021-02-16
2020-09-30	$140,922,480	1,465,500	+7.2%	Shares	Sole	2020-11-16
2020-06-30	$166,713,000	1,366,500	+1.3%	Shares	Sole	2020-08-14
2020-03-31	$116,799,225	1,349,500	—	Shares	Sole	2020-05-15
No filing history on record for this holder in this stock.