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CastleKnight Management LP — 13F Holdings & Portfolio

CIK 1835751 · latest 13F-HR filed 2026-08-14

Backtest portfolio

CastleKnight Management LP manages $7.38B in 13F-reported U.S. long-equity assets across 488 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are QQQ (12.77%), IWM (9.68%), IWM (9.32%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 71 new positions and exited 49; 189 existing positions rose in reported value and 116 fell.

AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.

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AUM
$7.38B

Long-equity book

Holdings
488

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+71 / −49 / ↑189 / ↓116

vs 2026-03-31

Portfolio charts

Latest quarter's book, what changed, and how the portfolio has evolved across filings.

Portfolio map

Q2 26
IREN2.0% · +46%CLS1.9% · -22%NVDA1.9% · -10%PBF1.9% · +8%CYH1.6% · +6%INSW1.6% · +102%BTDR1.6% · +3%NXPI1.5% · newAMZN1.5% · +52%GOOGL1.5% · +27%NAT1.4% · +36%CRWV1.4% · +45%DHT1.4% · +102%KEEL1.3% · -42%HBM1.3% · +41%STRZ1.3% · +57%FRO1.2% · +88%ASIX1.2% · +152%META1.1% · +529%ZD1.1% · +41%AVGO1.1% · +35%FRMI1.1% · +2043%TSM1.0% · +0%MSGS1.0% · -21%TEN1.0% · 0%LFTO1.0% · newMU0.9% · -85%TNK0.9% · +0%ADV0.9% · -22%TRMD0.9% · +120%TBT0.9% · +3%TTAM0.9% · +17%ERO0.9% · +971%CVI0.9% · -8%ENR0.9% · +81%CG0.8% · +10%SIMO0.7% · -81%TLN0.7% · +20%INGM0.7% · +127%DXC0.7% · +246%AMCX0.7% · +66%STNG0.7% · +82%SANM0.6% · -74%HELE0.6% · -10%ON0.6% · +586%LXU0.6% · -1%ARCB0.6% · +138%SKM0.6% · newDINO0.6% · +117%WIX0.6% · newCOF0.6% · +16%HUT0.6% · -77%NCLH0.5% · +43%CART0.5% · +102%ILPT0.5% · -12%PAHC0.5% · +508%KDP0.5% · newPTON0.5% · -3%NINE0.5% · -11%MOD0.5% · +9%

Box size = position value; colour = change in share count vs the prior quarter (green added, red trimmed, blue new). Rows split across managers or share classes are combined. Click a box for the stock.

Sector mix

% of 13F value

Sectors from each company's SIC code; funds and ETFs grouped separately.

Biggest buys and sells

Q1 26 → Q2 26

Estimated from the change in shares held × the quarter-end price, so price moves alone don't count as buying. New and exited positions are included.

13F assets and positions

4 quarters

Total reported 13F value (bars) and number of positions (line) each quarter. Value changes include market moves.

Top positions over time

reported value

The eight largest current positions, valued at each quarter end.

Concentration

top 10 = 17%

Cumulative share of the portfolio held in the largest N positions.

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 27, 2026.

Assets Under Management
$4.10B
Discretionary
$4.10B
Employees
13
Accounts
3
Address
888 SEVENTH AVENUE
24TH FLOOR
NEW YORK, NY 10019
Phone
(212) 852-6300
Website
Name Title / Status Ownership Type
CASTLEKNIGHT MANAGEMENT GP LLC ControlGENERAL PARTNER
since Apr 2020
Less than 5%Domestic Entity
SULLIVAN, CHRISTOPHER, HENRY ControlCHIEF COMPLIANCE OFFICER / CHIEF OPERATING OFFICER / CHIEF FINANCIAL OFFICER
since Apr 2020
Less than 5%Individual
WEITMAN CAPITAL LLC ControlLIMITED PARTNER
since Sep 2020
75% or moreDomestic Entity
WEITMAN, AARON, MICHAEL ControlCHIEF INVESTMENT OFFICER
since Apr 2020
Less than 5%Individual
SHALIT, BRAD, DEVOR Control
Indirect owner via WEITMAN INVESTMENT TRUST
TRUSTEE
since Sep 2020
General partner, trustee or managerIndividual
WEITMAN CAPITAL LLC Control
Indirect owner via CASTLEKNIGHT MANAGEMENT GP LLC
MANAGING MEMBER
since Sep 2020
General partner, trustee or managerDomestic Entity
WEITMAN INVESTMENT TRUST Control
Indirect owner via WEITMAN CAPITAL LLC
MEMBER
since Sep 2020
75% or moreDomestic Entity
WEITMAN, AARON, MICHAEL Control
Indirect owner via WEITMAN CAPITAL LLC
MANAGER
since Sep 2020
General partner, trustee or managerIndividual
WEITMAN, AARON, MICHAEL Control
Indirect owner via WEITMAN INVESTMENT TRUST
TRUSTEE
since Sep 2020
General partner, trustee or managerIndividual
Ownership & leadership changes · 2 filings with changes since May 22, 2020

From the firm’s regulatory filings, newest first. Dates are filing dates: a filing that no longer lists someone does not say when they left.

Jul 23, 2021 filing
  • AddedSHALIT, BRAD, DEVOR · TRUSTEE · General partner, trustee or manager · indirect via WEITMAN INVESTMENT TRUST · control person
  • AddedWEITMAN INVESTMENT TRUST · MEMBER · 75% or more · indirect via WEITMAN CAPITAL LLC · control person
  • AddedWEITMAN, AARON, MICHAEL · TRUSTEE · General partner, trustee or manager · indirect via WEITMAN INVESTMENT TRUST · control person
  • ChangedWEITMAN, AARON, MICHAEL · indirect via WEITMAN CAPITAL LLC: title MANAGING MEMBER → MANAGER; ownership 75% or more → General partner, trustee or manager
Nov 3, 2020 filing
  • No longer listedWEITMAN, AARON, MICHAEL · MANAGING MEMBER · 75% or more · indirect via CASTLEKNIGHT MANAGEMENT GP LLC · control person · listed since Apr 2020
  • AddedWEITMAN CAPITAL LLC · LIMITED PARTNER · 75% or more · control person
  • AddedWEITMAN CAPITAL LLC · MANAGING MEMBER · General partner, trustee or manager · indirect via CASTLEKNIGHT MANAGEMENT GP LLC · control person
  • AddedWEITMAN, AARON, MICHAEL · MANAGING MEMBER · 75% or more · indirect via WEITMAN CAPITAL LLC · control person
  • ChangedCASTLEKNIGHT MANAGEMENT GP LLC · now a control person
  • ChangedWEITMAN, AARON, MICHAEL · ownership 75% or more → Less than 5%
May 22, 2020 filing (earliest on record)
  • ListedCASTLEKNIGHT MANAGEMENT GP LLC · GENERAL PARTNER · Less than 5%
  • ListedSULLIVAN, CHRISTOPHER, HENRY · CHIEF COMPLIANCE OFFICER / CHIEF OPERATING OFFICER / CHIEF FINANCIAL OFFICER · Less than 5% · control person
  • ListedWEITMAN, AARON, MICHAEL · CHIEF INVESTMENT OFFICER · 75% or more · control person
  • ListedWEITMAN, AARON, MICHAEL · MANAGING MEMBER · 75% or more · indirect via CASTLEKNIGHT MANAGEMENT GP LLC · control person

Quarter-over-quarter changes

Changes in reported position value vs the prior 13F, so price moves count too, not just shares bought or sold.

CastleKnight Management LP Holdings (2026-06-30)

Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).

# Issuer Symbol CUSIP Value Weight Shares Type
1 INVESCO QQQ TR Call QQQ 46090E103 $942.6M 12.77% 1,280,000 SH
2 ISHARES TR Put IWM 464287655 $715.1M 9.68% 2,380,000 SH
3 ISHARES TR Call IWM 464287655 $688.0M 9.32% 2,290,000 SH
4 STATE STR SPDR S&P 500 ETF T Put SPY 78462F103 $619.8M 8.39% 830,000 SH
5 INVESCO QQQ TR Put QQQ 46090E103 $405.0M 5.49% 550,000 SH
6 STATE STR SPDR S&P 500 ETF T Call SPY 78462F103 $291.2M 3.94% 390,000 SH
7 ALPHABET INC Call GOOGL 02079K305 $78.6M 1.06% 220,000 SH
8 NXP SEMICONDUCTORS N V Call NXPI N6596X109 $70.3M 0.95% 250,000 SH
9 NVIDIA CORPORATION Call NVDA 67066G104 $60.0M 0.81% 300,000 SH
10 CELESTICA INC Call CLS 15101Q207 $58.4M 0.79% 160,000 SH
11 IREN LIMITED IREN Q4982L109 $54.0M 0.73% 1,181,175 SH
12 META PLATFORMS INC Call META 30303M102 $53.5M 0.72% 95,000 SH
13 CELESTICA INC CLS 15101Q207 $52.9M 0.72% 145,015 SH
14 NVIDIA CORPORATION NVDA 67066G104 $52.5M 0.71% 262,300 SH
15 PBF ENERGY INC PBF 69318G106 $51.2M 0.69% 1,124,676 SH
16 AMAZON COM INC Call AMZN 023135106 $50.1M 0.68% 210,000 SH
17 COMMUNITY HEALTH SYS INC NEW CYH 203668108 $44.7M 0.61% 13,384,586 SH
18 INTERNATIONAL SEAWAYS INC INSW Y41053102 $44.5M 0.60% 580,911 SH
19 MODINE MFG CO Call MOD 607828100 $44.1M 0.60% 165,000 SH
20 BITDEER TECHNOLOGIES GROUP BTDR G11448100 $44.0M 0.60% 2,773,910 SH
21 NXP SEMICONDUCTORS N V NXPI N6596X109 $41.8M 0.57% 148,900 SH
22 AMAZON COM INC AMZN 023135106 $40.5M 0.55% 170,090 SH
23 ALPHABET INC GOOGL 02079K305 $40.1M 0.54% 112,200 SH
24 NORDIC AMERICAN TANKERS LIMI NAT G65773106 $39.7M 0.54% 7,172,359 SH
25 COREWEAVE INC CRWV 21873S108 $38.5M 0.52% 386,500 SH
26 DHT HOLDINGS INC DHT Y2065G121 $37.1M 0.50% 2,242,216 SH
27 KEEL INFRASTRUCTURE CORP KEEL 486917107 $36.6M 0.50% 6,369,661 SH
28 INTERNATIONAL SEAWAYS INC Call INSW Y41053102 $36.0M 0.49% 470,000 SH
29 HUDBAY MINERALS INC HBM 443628102 $35.9M 0.49% 1,522,100 SH
30 STARZ ENTERTAINMENT CORP. STRZ 855919106 $35.9M 0.49% 1,242,780 SH
31 FRONTLINE PLC FRO M46528101 $32.8M 0.44% 943,700 SH
32 ADVANSIX INC ASIX 00773T101 $31.6M 0.43% 1,590,318 SH
33 META PLATFORMS INC META 30303M102 $31.5M 0.43% 56,000 SH
34 ZIFF DAVIS INC ZD 48123V102 $31.2M 0.42% 596,254 SH
35 BROADCOM INC AVGO 11135F101 $31.0M 0.42% 82,000 SH
36 FERMI INC FRMI 314911108 $30.2M 0.41% 3,292,022 SH
37 MICRON TECHNOLOGY INC Call MU 595112103 $29.4M 0.40% 25,500 SH
38 TAIWAN SEMICONDUCTOR MANUFAC TSM 874039100 $28.5M 0.39% 59,700 SH
39 MADISON SQUARE GRDN SPRT COR MSGS 55825T103 $28.4M 0.38% 70,639 SH
40 TSAKOS ENERGY NAVIGATION LTD TEN G9108L173 $28.3M 0.38% 799,594 SH
41 LIFTOFF MOBILE INC LFTO 53229X101 $27.2M 0.37% 1,130,800 SH
42 TALEN ENERGY CORP Call TLN 87422Q109 $26.9M 0.36% 70,000 SH
43 ISHARES INC Call EWY 464286772 $26.2M 0.36% 130,000 SH
44 MICRON TECHNOLOGY INC MU 595112103 $25.6M 0.35% 22,200 SH
45 TEEKAY TANKERS LTD TNK G8726X106 $25.4M 0.34% 391,036 SH
46 ADVANTAGE SOLUTIONS INC ADV 00791N201 $25.1M 0.34% 581,347 SH
47 TORM PLC TRMD G89479102 $24.7M 0.34% 949,724 SH
48 PROSHARES TR TBT 74347B201 $24.7M 0.33% 706,549 SH
49 TITAN AMER SA TTAM B9151N105 $24.6M 0.33% 1,318,207 SH
50 ERO COPPER CORP ERO 296006109 $24.3M 0.33% 910,184 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $7.38B 488 0000919574-26-005559
2026-03-31 2026-05-15 $6.00B 451 0000919574-26-003331
2025-12-31 2026-02-17 $4.51B 351 0000919574-26-001183
2025-09-30 2025-11-14 $5.08B 453 0000919574-25-006966
Filer Information
Address
888 SEVENTH AVENUE
24TH FLOOR
NEW YORK, NY 10019
Phone
(212) 852-6300
Filing Manager
CastleKnight Management LP
New York, NY
Signatory
Christopher H. Sullivan
CCO, COO & CFO