Q2 2026 13F · SEC CIK 1835751

CastleKnight Management LP

Hedge fundFiled 2026-08-14 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $2.7B
Reported positions: 400
Top holdings a year, 3 yrs: +76.3%
Assets under management: $4.1B

CastleKnight Management LP is a hedge fund that reported 400 positions worth $2.7B in its Q2 2026 13F, filed 2026-08-14. Its largest holdings were Iren Limited (IREN, 2.0%), Celestica Inc (CLS, 1.9%), Nvidia Corporation (NVDA, 1.9%). A portfolio copying its top holdings returned 76.3% a year over the last 3 years, against 22.3% for the S&P 500.

CastleKnight Management LP holdings largest 50 of 400 positions.

Weights are shares of the filer's total reported 13F value, compared with Q1 2026. Share changes may reflect splits; weight changes also reflect price moves. A 13F shows long US-listed positions only, up to 135 days after the fact.

CastleKnight Management LP 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
IRENIren Limited	2.0%	1.3%	1,181,175	+46.5%	$54.0M
CLSCelestica Inc	1.9%	2.4%	145,015	-21.8%	$52.9M
NVDANvidia Corporation	1.9%	2.4%	262,300	-9.8%	$52.5M
PBFPbf Energy Inc	1.9%	2.3%	1,124,676	+8.3%	$51.2M
CYHCommunity Health Systems Inc	1.6%	1.7%	13,384,586	+5.7%	$44.7M
INSWInternational Seaways Inc Com	1.6%	1.0%	580,911	+102.5%	$44.5M
BTDRBitdeer Technologies Group	1.6%	1.1%	2,773,910	+2.6%	$44.0M
NXPINxp Semiconductors N V	1.5%	—	148,900	—	$41.8M
AMZNAmazon Com Inc	1.5%	1.1%	170,090	+51.6%	$40.5M
GOOGLAlphabet Inc	1.5%	1.2%	112,200	+27.1%	$40.1M
NATNordic American Tankers Limi	1.4%	1.4%	7,172,359	+36.3%	$39.7M
CRWVCoreweave Inc	1.4%	1.0%	386,500	+45.2%	$38.5M
DHTDHT Holdings, Inc.	1.4%	0.9%	2,242,216	+102.3%	$37.1M
KEELKeel Infrastructure Corp	1.3%	—	6,369,661	—	$36.6M
HBMHudbay Minerals Inc	1.3%	1.1%	1,522,100	+41.2%	$35.9M
STRZStarz Entertainment Corp.	1.3%	—	1,242,780	—	$35.9M
FROFrontline PLC	1.2%	0.8%	943,700	+88.0%	$32.8M
ASIXAdvansix Inc	1.2%	0.7%	1,590,318	+151.7%	$31.6M
METAMeta Platforms Inc	1.2%	—	56,000	—	$31.5M
JCOMZiff Davis Inc	1.1%	0.8%	596,254	+41.1%	$31.2M
AVGOBroadcom Inc	1.1%	0.9%	82,000	+35.3%	$31.0M
FRMIFermi Inc	1.1%	—	3,292,022	—	$30.2M
TSMTaiwan Semiconductor Manufac	1.0%	0.9%	59,700	+0.3%	$28.5M
MSGKMadison Square Grdn Sprt Corp Cl A	1.0%	1.4%	70,639	-21.4%	$28.4M
TENTsakos Energy Navigation Ltd	1.0%	1.5%	799,594	+0.0%	$28.3M
LFTOLiftoff Mobile Inc	1.0%	—	1,130,800	—	$27.2M
MUMicron Technology Inc	0.9%	2.3%	22,200	-84.7%	$25.6M
TNKTeekay Tankers Ltd	0.9%	1.3%	391,036	+0.2%	$25.4M
ADVAdvantage Solutions Inc	0.9%	0.7%	581,347	-22.3%	$25.1M
TRMDTorm PLC	0.9%	0.6%	949,724	+119.7%	$24.7M
TBTProshares Tr	0.9%	1.1%	706,549	+3.2%	$24.7M
TTAMTitan America SA	0.9%	0.8%	1,318,207	+17.4%	$24.6M
EROEro Copper Corp	0.9%	—	910,184	—	$24.3M
CVICvr Energy Inc	0.9%	1.5%	876,573	-7.6%	$24.1M
ENREnergizer Hldgs Inc	0.9%	—	1,122,125	—	$24.1M
CGCarlyle Group Inc	0.8%	1.1%	519,576	+9.9%	$21.9M
SIMOSilicon Motion Technology Co	0.7%	1.7%	61,475	-81.0%	$20.5M
TLNTalen Energy Corp	0.7%	0.7%	53,000	+20.2%	$20.4M
INGMIngram Micro Hldg Corp	0.7%	—	738,000	—	$20.2M
DXCDxc Technology Co	0.7%	—	2,172,700	—	$19.2M
AMCXAmc Global Media Inc	0.7%	—	1,838,500	—	$18.3M
STNGScorpio Tankers Inc	0.7%	0.5%	259,500	+82.5%	$18.0M
SANMSanmina Corp	0.6%	1.6%	66,883	-74.2%	$16.9M
HELEHelen of Troy Ltd	0.6%	—	569,900	—	$16.6M
ONOn Semiconductor Corp	0.6%	—	171,600	—	$16.2M
LXULsb Inds Inc	0.6%	1.1%	1,494,391	-1.3%	$16.2M
ARCBArcbest Corp	0.6%	—	112,095	—	$16.1M
SKMSK Telecom Co., Ltd. Sponsored	0.6%	—	490,000	—	$15.8M
DINOHf Sinclair Corp	0.6%	—	225,693	—	$15.7M
WIXWix Com Ltd	0.6%	—	346,000	—	$15.7M

What CastleKnight Management LP bought and sold in Q2 2026, against Q1 2026.

New positions

Q1 2026's filing was too long to tell new positions apart.

Share counts compared with the Q1 2026 13F; a split also changes share counts. The latest filing lists more than 50 positions, so a position that left the top 50 may still be held.

How the holdings did against the S&P 500.

1 year: +57.5% /yr; S&P 500 +11.7%
3 years: +76.3% /yr; S&P 500 +22.3%
5 years: +41.4% /yr; S&P 500 +12.0%

A portfolio of the filer's 20 largest 13F positions, weighted by value, bought the trading day after each 13F was filed and held until the next one was: what copying this filer could have earned. 13Fs show long US-listed positions only, so this is an estimate of the stock picks, not the fund's reported returns.

Reported 13F value by quarter.

13F value by quarter
Quarter	13F value	Positions
Q2 2026	$2.7B	400
Q1 2026	$2.1B	377
Q4 2025	$1.8B	313
Q3 2025	$1.9B	365
Q2 2025	$1.5B	353
Q1 2025	$902.0M	287
Q4 2024	$861.7M	310
Q3 2024	$829.1M	312
Q2 2024	$720.3M	290
Q1 2024	$662.8M	270
Q4 2023	$623.7M	272
Q3 2023	$575.4M	260

Questions about CastleKnight Management LP's portfolio

What stocks does CastleKnight Management LP own?

CastleKnight Management LP's latest 13F, for Q2 2026 and filed Aug 14, 2026, lists 400 positions worth $2.7B. The largest are Iren Limited (IREN) at 2.0%, Celestica Inc (CLS) at 1.9%, Nvidia Corporation (NVDA) at 1.9%, Pbf Energy Inc (PBF) at 1.9% and Community Health Systems Inc (CYH) at 1.6%.

What did CastleKnight Management LP buy last quarter?

In Q2 2026, CastleKnight Management LP added Advansix Inc (ASIX) (+151.7% shares), Torm PLC (TRMD) (+119.7% shares) and International Seaways Inc Com (INSW) (+102.5% shares), compared with its Q1 2026 filing.

What did CastleKnight Management LP sell last quarter?

In Q2 2026, CastleKnight Management LP cut from its top 50 Marvell Technology Inc (MRVL), cut from its top 50 Hut 8 Corp (HUT), cut from its top 50 Sandisk Corp (SNDK), cut from its top 50 Bitfarms Ltd (BITF), cut from its top 50 Netflix Inc. (NFLX), Micron Technology Inc (MU) (-84.7% shares), Silicon Motion Technology Co (SIMO) (-81.0% shares) and Sanmina Corp (SANM) (-74.2% shares), compared with its Q1 2026 filing.

How has CastleKnight Management LP's portfolio performed?

A portfolio copying CastleKnight Management LP's 20 largest 13F holdings each quarter, from the day each filing was public, returned +76.3% a year over the last 3 years, against +22.3% for the S&P 500. Over 1 year: +57.5% against +11.7%. Over 5 years: +41.4% a year against +12.0%.

When is CastleKnight Management LP's next 13F filing due?

13F filings are due 45 days after each quarter ends. CastleKnight Management LP's filing for the quarter ending Sep 30, 2026 is due by Nov 14, 2026; this page updates the day after it is published.

How much money does CastleKnight Management LP manage?

CastleKnight Management LP reported $4.1B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $2.7B.