Q2 2026 13F · SEC CIK 1096978

Mariner Investment Group LLC

Hedge fundFiled 2026-07-27 for Q2 2026. Open the filing ↗ · All SEC filings ↗

Reported 13F value: $271.4M
Reported positions: 64
Top holdings a year, 3 yrs: -8.1%
Assets under management: $176.3B

Mariner Investment Group LLC is a hedge fund that reported 64 positions worth $271.4M in its Q2 2026 13F, filed 2026-07-27. Its largest holdings were Ishares Bitcoin Trust ETF (IBIT, 38.4%), State Str Spdr S&p 500 ETF T (SPY, 21.0%), Rithm Capital Corp (RITM, 4.6%). A portfolio copying its top holdings returned -8.1% a year over the last 3 years, against 17.1% for the S&P 500.

Mariner Investment Group LLC holdings largest 50 of 64 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.

Mariner Investment Group LLC 13F holdings
Stock	% of 13F value	Q1 2026	Shares	Share change	Reported value
IBITIshares Bitcoin Trust ETF	38.4%	61.9%	3,129,352	+0.0%	$104.2M
SPYState Str Spdr S&p 500 ETF T	21.0%	New	76,475	—	$57.1M
RITMRithm Capital Corp	4.6%	6.5%	1,332,583	+0.0%	$12.5M
SHYIshares Tr	3.1%	3.2%	101,199	+33.5%	$8.3M
CIMChimera Invt Corp	1.9%	2.4%	378,899	+0.0%	$5.1M
MUBIshares Tr	1.8%	New	45,454	—	$4.9M
ETREntergy Corp New	1.7%	2.3%	40,000	+0.0%	$4.6M
VCSHVanguard Scottsdale Fds	1.6%	2.1%	53,317	+1.9%	$4.2M
LECOLincoln Elec Hldgs Inc	1.5%	0.8%	15,705	+161.8%	$4.2M
WMBWilliams Cos	1.5%	1.7%	55,000	+22.2%	$4.1M
GLWCorning Inc	1.3%	New	14,000	—	$3.6M
82452J307Shift4 Pmts Inc	1.3%	New	55,000	—	$3.4M
MTZMasTec Inc	1.2%	1.0%	8,000	+33.3%	$3.3M
AEROGrupo Aeromexico Sab de Cv	1.1%	1.2%	169,280	+0.0%	$3.0M
FERGFerguson Enterprises Inc Common Stock Ne	1.0%	New	12,000	—	$2.8M
EWZIshares Inc	1.0%	New	80,000	—	$2.8M
RWTRedwood Trust Inc	1.0%	1.6%	550,361	+0.0%	$2.6M
FOURShift4 Pmts Inc Cl A	0.9%	3.3%	50,000	-65.5%	$2.4M
IEIIshares Tr	0.9%	0.5%	20,551	+169.1%	$2.4M
IEFIshares Tr	0.8%	New	22,596	—	$2.1M
MFAMFA Financial Inc.	0.8%	1.0%	210,000	+0.0%	$2.0M
PMTPennyMac Mortgage Investment Trust	0.7%	1.1%	180,000	+0.0%	$2.0M
HYGIshares Tr	0.7%	New	24,600	—	$2.0M
TOLToll Brothers Inc	0.6%	New	10,000	—	$1.6M
BHFBrighthouse Finl Inc	0.6%	New	25,000	—	$1.6M
TLTIshares Tr	0.6%	New	18,080	—	$1.6M
FIXComfort Sys USA Inc	0.5%	New	750	—	$1.5M
IRENIren Limited	0.5%	New	30,000	—	$1.4M
LUMNLumen Technologies Inc	0.5%	0.3%	175,000	+133.3%	$1.3M
DXDynex Capital Inc	0.5%	0.6%	95,000	+0.0%	$1.2M
GEVGe Vernova Inc	0.4%	New	1,000	—	$1.2M
IGVIshares Tr	0.4%	0.5%	12,500	+0.0%	$1.1M
RRCRange Res Corp	0.4%	0.7%	30,000	+0.0%	$1.1M
EQTEqt Corp	0.4%	0.7%	20,000	+0.0%	$1.1M
SABRSabre Corp	0.3%	New	400,000	—	$836K
WMTWalmart Inc	0.3%	0.5%	7,264	+0.0%	$823K
WIXWix Com Ltd	0.3%	0.4%	17,144	+90.5%	$778K
KRMNKarman Hldgs Inc	0.3%	0.2%	15,000	+200.0%	$749K
QQnity Electronics Inc Common Stock	0.2%	New	4,000	—	$653K
CORZCore Scientific Inc New	0.2%	0.2%	25,000	+25.0%	$640K
CIFRCipher Digital Inc	0.2%	New	25,000	—	$613K
CSCOCisco Sys Inc	0.2%	New	5,000	—	$587K
CCKCrown Hldgs Inc	0.2%	0.3%	5,000	+0.0%	$559K
AESAES Corp	0.2%	0.3%	35,000	+0.0%	$513K
CRWVCoreweave Inc	0.2%	New	5,000	—	$498K
FLEXFlex Ltd Ord	0.2%	New	3,000	—	$486K
WOLFWolfspeed Inc	0.2%	0.2%	10,000	-60.0%	$483K
N3144W105Expro Group Holdings NV	0.2%	0.2%	30,000	+50.0%	$443K
IHRTIheartmedia Inc - Class A	0.2%	0.1%	102,064	+61.5%	$438K
TWOTwo Harbors Investment Corp.	0.1%	0.2%	32,776	+0.0%	$407K

What Mariner Investment Group LLC bought and sold in Q2 2026, against Q1 2026.

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: -19.4% /yr; S&P 500 +20.1%
3 years: -8.1% /yr; S&P 500 +17.1%
5 years: -7.9% /yr; S&P 500 +8.9%

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	$271.4M	64
Q1 2026	$194.2M	44
Q4 2025	$1.6B	59
Q3 2025	$257.5M	38
Q2 2025	$273.8M	45
Q1 2025	$251.6M	26
Q4 2024	$498.2M	33
Q3 2024	$364.4M	22
Q2 2024	$462.3M	17
Q1 2024	$319.3M	18
Q4 2023	$368.4M	18
Q1 2023	$3.3B	20

Questions about Mariner Investment Group LLC's portfolio

What stocks does Mariner Investment Group LLC own?

Mariner Investment Group LLC's latest 13F, for Q2 2026 and filed Jul 27, 2026, lists 64 positions worth $271.4M. The largest are Ishares Bitcoin Trust ETF (IBIT) at 38.4%, State Str Spdr S&p 500 ETF T (SPY) at 21.0%, Rithm Capital Corp (RITM) at 4.6%, Ishares Tr (SHY) at 3.1% and Chimera Invt Corp (CIM) at 1.9%.

What did Mariner Investment Group LLC buy last quarter?

In Q2 2026, Mariner Investment Group LLC added a new position in State Str Spdr S&p 500 ETF T (SPY), a new position in Ishares Tr (MUB), a new position in Corning Inc (GLW), a new position in Shift4 Pmts Inc, a new position in Ferguson Enterprises Inc Common Stock Ne (FERG), Karman Hldgs Inc (KRMN) (+200.0% shares), Ishares Tr (IEI) (+169.1% shares) and Lincoln Elec Hldgs Inc (LECO) (+161.8% shares), compared with its Q1 2026 filing.

What did Mariner Investment Group LLC sell last quarter?

In Q2 2026, Mariner Investment Group LLC cut from its top 50 Caterpillar Inc (CAT), cut from its top 50 Solstice Advanced Matls Inc (SOLS), cut from its top 50 Legence Corp (LGN), cut from its top 50 Microchip Technology Inc. (MCHP), cut from its top 50 Macom Tech Solutions Hldgs I (MTSI), Shift4 Pmts Inc Cl A (FOUR) (-65.5% shares) and Wolfspeed Inc (WOLF) (-60.0% shares), compared with its Q1 2026 filing.

How has Mariner Investment Group LLC's portfolio performed?

A portfolio copying Mariner Investment Group LLC's 20 largest 13F holdings each quarter, from the day each filing was public, returned -8.1% a year over the last 3 years, against +17.1% for the S&P 500. Over 1 year: -19.4% against +20.1%. Over 5 years: -7.9% a year against +8.9%.

When is Mariner Investment Group LLC's next 13F filing due?

13F filings are due 45 days after each quarter ends. Mariner Investment Group LLC'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 Mariner Investment Group LLC manage?

Mariner Investment Group LLC reported $176.3B of regulatory assets under management on its latest SEC Form ADV. Its 13F, which covers only US-listed stocks and options, totals $271.4M.