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GeoSphere Capital Management, LLC — 13F Holdings & Portfolio

CIK 1426876 · latest 13F-HR filed 2026-08-14

Backtest portfolio

GeoSphere Capital Management, LLC manages $306.3M in 13F-reported U.S. long-equity assets across 46 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are SPY (12.19%), QQQ (10.82%), IWM (8.83%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 10 new positions and exited 12; 12 existing positions rose in reported value and 12 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
$306.3M

Long-equity book

Holdings
46

Distinct positions

Period
2026-06-30

Filed 2026-08-14

Q/Q Activity
+10 / −12 / ↑12 / ↓12

vs 2026-03-31

Portfolio charts

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

Portfolio map

Q2 26
NESR12.4% · +46%BKV8.2% · +7%WULF6.7% · +25%CNR6.5% · +14%FLR5.6% · +93%SEI4.8% · +35%VIST4.5% · +10%CCJ3.7% · +17%HMH3.6% · newARIS3.2% · +180%KOS3.1% · +38%BORR2.8% · +242%DK2.7% · +14%LBRT2.4% · +30%GNRC2.3% · newVLO2.2% · newCVE2.1% · 0%HAFN1.8% · +98%INVX1.7% · +11%FNV1.6% · newDNN1.6% · 0%OII1.5% · -42%HNRG1.4% · newURG1.3% · -21%B1.3% · 0%TRMD1.2% · newCF1.1% · -16%AR1.1% · newGLNG1.0% · 0%NXE1.0% · 0%IAG0.9% · +19%NVGS0.9% · 0%BE0.8% · newCENX0.8% · -61%SCZM0.7% · newPAAS0.6% · +57%DHT0.5% · newLPG0.5% · -58%

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 = 59.4%

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

Firm Profile & Key People

As of the firm’s regulatory filing dated Mar 30, 2026.

Assets Under Management
$258.4M
Discretionary
$258.4M
Employees
6
Accounts
5
Address
1674 MERIDIAN AVENUE
SUITE 330
MIAMI BEACH, FL 33139
Phone
(212) 616-1100
Website
Name Title / Status Ownership Type
GEOSPHERE HOLDINGS LP ControlSOLE OWNER
since Aug 2021
75% or moreDomestic Entity
Lamb, Hamish, John ControlCHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER AND CHIEF OPERATIONS OFFICER
since Dec 2025
Less than 5%Individual
SANGER, ARVIND, SINGH ControlCHIEF INVESTMENT OFFICER
since Jul 2007
Less than 5%Individual
GEOSPHERE HOLDINGS GP LLC Control
Indirect owner via GEOSPHERE HOLDINGS LP
GENERAL PARTNER
since Aug 2021
75% or moreDomestic Entity
SANGER, ARVIND, SINGH Control
Indirect owner via GEOSPHERE HOLDINGS GP LLC
MANAGING MEMBER
since Aug 2021
75% or moreIndividual
Ownership & leadership changes · 7 filings with changes since Feb 10, 2012

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.

Jan 28, 2026 filing
  • No longer listedBORRERO, MARIA, GABRIELA · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER · Less than 5% · control person · listed since Apr 2023
  • AddedLamb, Hamish, John · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER AND CHIEF OPERATIONS OFFICER · Less than 5% · control person
Apr 21, 2023 filing
  • No longer listedDUFFY, SING, WU · CHIEF COMPLIANCE OFFICER · Less than 5% · control person · listed since Mar 2022
  • AddedBORRERO, MARIA, GABRIELA · CHIEF COMPLIANCE OFFICER AND CHIEF FINANCIAL OFFICER · Less than 5% · control person
Mar 30, 2022 filing
  • AddedGEOSPHERE HOLDINGS GP LLC · GENERAL PARTNER · 75% or more · indirect via GEOSPHERE HOLDINGS LP · control person
  • AddedGEOSPHERE HOLDINGS LP · SOLE OWNER · 75% or more · control person
  • AddedSANGER, ARVIND, SINGH · MANAGING MEMBER · 75% or more · indirect via GEOSPHERE HOLDINGS GP LLC · control person
  • Listed againDUFFY, SING, WU · CHIEF COMPLIANCE OFFICER · Less than 5% · control person
  • ChangedSANGER, ARVIND, SINGH · title MANAGING MEMBER AND CHIEF COMPLIANCE OFFICER → CHIEF INVESTMENT OFFICER; ownership 75% or more → Less than 5%
May 14, 2019 filing
  • No longer listedDUFFY, SING, WU · CHIEF FINANCIAL OFFICER · Less than 5% · listed since Jul 2013
  • No longer listedPOTTER, JOHN, CARTISANO · CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Jul 2013
  • ChangedSANGER, ARVIND, SINGH · title MANAGING MEMBER → MANAGING MEMBER AND CHIEF COMPLIANCE OFFICER
Mar 13, 2015 filing
  • Listed againDUFFY, SING, WU · CHIEF FINANCIAL OFFICER · Less than 5%
Nov 5, 2013 filing
  • No longer listedMULLER, RICK, BARRY · CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5% · listed since Apr 2009
  • AddedPOTTER, JOHN, CARTISANO · CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5%
Mar 25, 2013 filing
  • No longer listedDUFFY, SING, WU · CHIEF FINANCIAL OFFICER · Less than 5% · listed since Jan 2011
Feb 10, 2012 filing (earliest on record)
  • ListedDUFFY, SING, WU · CHIEF FINANCIAL OFFICER · Less than 5%
  • ListedMULLER, RICK, BARRY · CHIEF OPERATING OFFICER/CHIEF COMPLIANCE OFFICER · Less than 5%
  • ListedSANGER, ARVIND, SINGH · MANAGING MEMBER · 75% or more · 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.

GeoSphere Capital Management, LLC 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 STATE STR SPDR S&P 500 ETF T Put SPY 78462F103 $37.3M 12.19% 50,000 SH
2 INVESCO QQQ TR Put QQQ 46090E103 $33.1M 10.82% 45,000 SH
3 ISHARES TR Put IWM 464287655 $27.0M 8.83% 90,000 SH
4 NATIONAL ENERGY SERVICES REU NESR G6375R107 $23.9M 7.81% 799,578 SH
5 BKV CORP BKV 05603J108 $15.9M 5.20% 581,689 SH
6 TERAWULF INC WULF 88080T104 $12.9M 4.21% 522,574 SH
7 CORE NATURAL RESOURCES INC CNR 218937100 $12.6M 4.13% 157,926 SH
8 FLUOR CORP FLR 343412102 $10.9M 3.56% 208,000 SH
9 SOLARIS ENERGY INFRAS INC SEI 83418M103 $9.3M 3.03% 115,366 SH
10 VISTA ENERGY S.A.B. DE C.V. VIST 92837L109 $8.8M 2.86% 137,473 SH
11 CAMECO CORP CCJ 13321L108 $7.1M 2.31% 69,363 SH
12 HMH HLDG INC HMH 40445M100 $7.0M 2.29% 375,000 SH
13 ARIS MINING CORPORATION ARIS 04040Y109 $6.3M 2.04% 420,000 SH
14 KOSMOS ENERGY LTD KOS 500688106 $5.9M 1.94% 2,813,788 SH
15 BORR DRILLING LTD BORR G1466R173 $5.4M 1.75% 1,301,361 SH
16 UNITED STS OIL FD LP Call USO 91232N207 $5.3M 1.74% 50,000 SH
17 DELEK US HLDGS INC NEW DK 24665A103 $5.2M 1.70% 102,717 SH
18 ISHARES TR Put EFA 464287465 $5.2M 1.70% 50,000 SH
19 LIBERTY ENERGY INC LBRT 53115L104 $4.6M 1.49% 173,768 SH
20 GENERAC HLDGS INC GNRC 368736104 $4.4M 1.43% 15,000 SH
21 VALERO ENERGY CORP VLO 91913Y100 $4.2M 1.36% 16,000 SH
22 CENOVUS ENERGY INC CVE 15135U109 $4.0M 1.31% 161,548 SH
23 HAFNIA LTD HAFN Y2990R101 $3.5M 1.14% 525,000 SH
24 ISHARES BITCOIN TRUST ETF Put IBIT 46438F101 $3.3M 1.09% 100,000 SH
25 INNOVEX INTERNATIONAL INC INVX 457651107 $3.3M 1.06% 131,066 SH
26 FRANCO NEV CORP FNV 351858105 $3.1M 1.02% 15,000 SH
27 DENISON MINES CORP DNN 248356107 $3.0M 0.98% 977,106 SH
28 OCEANEERING INTL INC OII 675232102 $2.8M 0.92% 69,689 SH
29 HALLADOR ENERGY COMPANY HNRG 40609P105 $2.6M 0.85% 150,000 SH
30 UR-ENERGY INC URG 91688R108 $2.6M 0.83% 1,875,507 SH
31 BARRICK MNG CORP B 06849F108 $2.5M 0.82% 68,524 SH
32 TORM PLC TRMD G89479102 $2.3M 0.77% 90,000 SH
33 CF INDUSTRIES HOLD CF 125269100 $2.2M 0.71% 20,000 SH
34 ANTERO RESOURCES CORP AR 03674X106 $2.1M 0.69% 60,000 SH
35 GOLAR LNG LTD GLNG G9456A100 $2.0M 0.65% 40,000 SH
36 NEXGEN ENERGY LTD NXE 65340P106 $1.9M 0.63% 204,656 SH
37 IAMGOLD CORP IAG 450913108 $1.7M 0.57% 110,000 SH
38 NAVIGATOR HLDGS LTD NVGS Y62132108 $1.7M 0.56% 92,000 SH
39 BLOOM ENERGY CORP BE 093712107 $1.5M 0.49% 5,000 SH
40 CENTURY ALUM CO CENX 156431108 $1.5M 0.48% 32,000 SH
41 SANTACRUZ SILVER MNG LTD SCZM 80280U205 $1.3M 0.42% 200,000 SH
42 PAN AMERN SILVER CORP PAAS 697900108 $1.1M 0.37% 25,000 SH
43 STRATEGY INC Put MSTR 594972408 $1.1M 0.36% 12,600 SH
44 DHT HOLDINGS INC DHT Y2065G121 $991.8K 0.32% 60,000 SH
45 FERMI INC Put FRMI 314911108 $916.0K 0.30% 100,000 SH
46 DORIAN LPG LTD LPG Y2106R110 $869.5K 0.28% 25,000 SH
Filing History
Period Filed AUM Holdings Accession
2026-06-30 2026-08-14 $306.3M 46 0001214659-26-010366
2026-03-31 2026-05-15 $228.8M 42 0001214659-26-006453
2025-12-31 2026-02-09 $303.8M 40 0001214659-26-001324
2025-09-30 2025-11-14 $131.7M 42 0001214659-25-016621
Filer Information
Address
1674 MERIDIAN AVENUE
SUITE 330
MIAMI BEACH, FL 33139
Phone
(212) 616-1101
Filing Manager
GeoSphere Capital Management, LLC
MIAMI BEACH, FL
Signatory
Hamish Lamb
Chief Compliance Officer