Hudson Bay Capital Management LP

Position in SRRK — Scholar Rock Holding Corp

CIK 1393825 STAMFORD, CT

Back to SRRK Full portfolio

Position in SRRK

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

Position Value

$4,102,402

-$302,598 QoQ

Shares Held

83,450

-16.6% QoQ

Ownership

0.070%

of shares outstanding

% of Portfolio

0.03%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2025

3 quarters on record

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

Common Shares in SRRK Over Time

Shares Held

Position Value (USD)

Derivatives in SRRK

reported options exposure · as of Sep 30, 2025

CallValue

CallShares

PutValue

$20,511,792

PutShares

550,800

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Biotechnology

Healthcare · as of Mar 31, 2026

Hudson Bay Capital Management LP holds $536,414,605 across 150 Biotechnology names. SRRK ranks #30 (0.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BMRN	Biomarin Pharmaceutical Inc	974,776	$55,065,096
2	APLS	Apellis Pharmaceuticals, Inc.	1,190,416	$47,890,435
3	REGN	Regeneron Pharmaceuticals, Inc.	32,001	$24,725,252
4	BNTX	BioNTech SE	275,000	$24,442,000
5	IONS	Ionis Pharmaceuticals Inc	295,100	$22,159,059
6	ARGX	Argenx SE	30,000	$21,907,500
7	VRTX	Vertex Pharmaceuticals Inc / Ma	45,000	$20,094,300
8	IMCR	Immunocore Holdings plc	633,174	$19,090,196

All Filings in SRRK

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4 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$4,102,402	83,450	-16.6%	Shares	Defined	2026-05-13
2025-12-31	$4,405,000	100,000	-81.8%	Shares	Sole	2026-02-13
2025-09-30	$20,511,792	550,800	+5408.0%	Put	Sole	2025-12-15
2025-09-30	$372,400	10,000	—	Shares	Sole	2025-12-15
No filing history on record for this holder in this stock.