MARINER INVESTMENT GROUP LLC

Registered adviser

CIK

1096978

Location

NEW YORK, NY

Portfolio Value

Small $401,973,397

Diversification

Moderately concentrated

Filing Date

Global Rank

#5,050 / 8,827 ▲ 522 · as of Jun 2026

Top Industry

Aerospace & Defense 44.6%

3Y Alpha vs SPY

+3.6%

Period ended 38 days ago

Filed Nov 4, 2026 · 3d

25 quarters · since Mar 2020

Regulatory profile

From Form ADV, the SEC filer profile, 13D/13G type codes and N-CEN, never from the name.

Holder type

Registered adviser

Form ADV roster, Nov 1, 2026

Form ADV adviser

CRD 124744

Roster of Nov 1, 2026

Regulatory AUM

$176,308,128,651

Main clients

Pooled investment vehicles (72% of AUM)

Private funds

17 funds · Hedge funds

Focus by fund count, roster of Nov 1, 2026

$123,499,757,220 gross assets

LEI

NXO6CSBU4HJQCHKIQG96

Private funds on Schedule D 7.B.(1)

As filed Mar 28, 2024; SEC's bulk Form ADV archive ends with 2024 filings.

$116,532,598,152 gross assets in 17 funds Hedge funds $116,513,119,548 (16) Other private funds $19,478,604 (1)

Form ADV history

Monthly rosters from Dec 2019; each row is a run with the same figures, newest first.

Rosters	Regulatory AUM	Main clients
Sep 2026 to Nov 2026	$176,308,128,651	Pooled investment vehicles (72%)
Apr 2026 to Aug 2026	$149,623,092,189	Pooled investment vehicles (84%)
Mar 2025 to Mar 2026	$119,844,184,594	Pooled investment vehicles (86%)
Apr 2024 to Feb 2025	$126,022,034,338	Pooled investment vehicles (98%)
Mar 2024	$154,061,973,743	Pooled investment vehicles (97%)
Dec 2023 to Feb 2024	$154,061,973,743	Pooled investment vehicles (97%)

9 earlier changes not shown.

Portfolio style

Measured from the filed 13F common-share book for Jun 30, 2026, the newest measured quarter, never from the firm's own description.

Style

Concentrated

The top 10 positions are 82.7% of the book (60%+)

Turnover

Medium turnover

68.8% over the last four quarters (30% to under 100%)

Horizon

Short horizon

Value-weighted holding period 3.4 quarters (under 4)

Closest benchmark: every 13F filer's combined book, active share 92.6%; sector active share 65.9% against the combined 13F book's sector weights.

Over time 24 measured quarters

How the bands are measured

Style bands measure the filed 13F common-share book each closed quarter, tested in this order. Unknown: under $10,000,000 of valued equity or 5 stocks. Index-like (100+ stocks): active share of 20% or less against the closest benchmark, which is the S&P 500, S&P MidCap 400, S&P SmallCap 600, Russell 1000, Russell 2000, Nasdaq-100 or Dow Jones Industrial Average (weighted by an index-tracking fund's reported holdings or the index's constituents nearest the quarter end, over the names resolved to companies, and only when those are 90%+ of its weight) or every 13F filer's combined book, or index series holding 80%+ of the registered fund assets it advises (N-CEN) and equal to 50%+ of its book. Systematic-like: 500+ stocks, 100%+ annual turnover and a top 10 weight of 25% or less. Concentrated: a top 10 weight of 60%+ or 12 or fewer effective positions. Diversified active: none of these. Turnover is the smaller of buys and sells over average equity value, summed over four quarters: low under 30%, high 100%+. Horizon is the value-weighted number of quarters each position has been held: short under 4, long 12+.

Clone Performance

Build a hypothetical price-return history from this filer's public 13F holdings.

View clone backtest

Portfolio Concentration

69 tracked positions · as of Sep 30, 2026 · Δ vs Jun 30, 2026

Top Position

36.9%

+4.4 pts

Top 5

89.6%

+16.8 pts

Top 10

94.3%

+14.5 pts

HHI

2,299

Moderately concentrated+698

Portfolio Trend

25 quarters · across all stocks

Sector Breakdown

As of Sep 30, 2026

Sector	% Portfolio	Value	Positions
Unclassified	80.0%	$321,602,955	13
Industrials	10.0%	$40,389,255	12
Real Estate	5.8%	$23,143,135	8
Basic Materials	1.4%	$5,728,855	5
Technology	1.2%	$4,645,842	7
Consumer Cyclical	0.6%	$2,424,280	9
Energy	0.3%	$1,382,660	3
Communication Services	0.3%	$1,199,081	3
Utilities	0.2%	$980,000	1
Financial Services	0.1%	$476,400	7
Consumer Defensive	0.0%	$934	1

Last Quarter's Activity

Export CSV

Sep 30, 2026 vs Jun 30, 2026

Added To

Positions the filer increased

9 positions

Ticker	Company	Δ Shares	Shares	Value
HYG	iShares iBoxx $ High Yield Corporate Bond ETF	+248,000	272,600	$21,047,446
RWT	Redwood Trust Inc	+90,000	640,361	$2,484,600
IHRT	iHeartMedia, Inc.	+84,689	186,753	$392,181
RITM	Rithm Capital Corp.	+41,100	1,373,683	$12,266,989
CIM	Chimera Investment Corp	+21,400	400,299	$3,814,849
MUB	iShares National Muni Bond ETF	+19,861	65,315	$6,603,346
MFA	Mfa Financial, Inc.	+5,900	215,900	$1,694,815
NE	Noble Corp plc	+5,000	15,000	$626,100
TLT	iShares 20+ Year Treasury Bond ETF	+2,994	21,074	$1,639,135
No positions match the current search.

Trimmed

Positions the filer reduced

9 positions

Ticker	Company	Δ Shares	Shares	Value
SHY	iShares 1-3 Year Treasury Bond ETF	−89,755	11,444	$929,252
LUMN	Lumen Technologies, Inc.	−75,000	100,000	$560,000
FOUR	Shift4 Payments, Inc.	−40,000	10,000	$361,700
LECO	Lincoln Electric Holdings Inc	−13,705	2,000	$529,160
IEF	iShares 7-10 Year Treasury Bond ETF	−12,435	10,161	$907,478
GLW	Corning Inc	−9,000	5,000	$768,800
TOL	Toll Brothers, Inc.	−7,000	3,000	$404,250
USAR	USA Rare Earth, Inc.	−5,000	10,000	$140,800
IEI	iShares 3-7 Year Treasury Bond ETF	−2,090	18,461	$2,094,215
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
QQQ	Invesco Qqq Trust, Series 1	120,300	$88,994,331
DPC	DPC Holdings PLC	806,988	$34,103,312
LQD	iShares iBoxx $ Investment Grade Corporate Bond ETF	71,090	$7,263,976
VTEB	VANGUARD TAX-EXEMPT BOND INDEX FUND	110,000	$5,209,600
JNK	State Street(R) SPDR(R) Bloomberg High Yield Bond ETF	23,000	$2,133,250
NVDA	Nvidia Corp	7,500	$1,712,850
CAT	Caterpillar Inc	2,000	$1,621,580
CARR	CARRIER GLOBAL Corp	25,000	$1,371,500
OLN	OLIN Corp	82,340	$1,276,270
IBP	Installed Building Products, Inc.	6,000	$1,151,280
PCG	PG&E Corp	80,000	$980,000
RTX	RTX Corp	3,000	$556,950
LMT	Lockheed Martin Corp	1,000	$509,250
NOC	Northrop Grumman Corp	1,000	$483,480
ENTG	Entegris Inc	3,000	$462,180
AMBP	Ardagh Metal Packaging S.A.	100,000	$434,000
SLB	Slb Limited	8,000	$389,760
RIG	Transocean Ltd.	70,000	$366,800
AAL	American Airlines Group Inc.	25,000	$334,250
HWM	Howmet Aerospace Inc.	1,000	$226,180
TROX	Tronox Holdings plc	50,000	$197,500
UPS	United Parcel Service Inc	2,000	$186,880
GBDC	GOLUB CAPITAL BDC, Inc.	10,000	$126,300
UWMC	UWM Holdings Corp	20,000	$23,600
PSQLW	Pasqal Holding SA	10,000	$10,750
No positions match the current search.

Sold Out

Positions the filer fully exited

25 positions

Ticker	Company	Shares	Value
SPY	Spdr S&P 500 ETF Trust	76,475	$57,109,235
ETR	Entergy Corp	40,000	$4,594,400
VCSH	VANGUARD SHORT-TERM CORPORATE BOND INDEX FUND	53,317	$4,213,642
WMB	Williams Companies, Inc.	55,000	$4,088,700
MTZ	Mastec Inc	8,000	$3,328,480
AERO	Grupo Aeromexico, S.A.B. de C.V.	169,280	$3,047,040
FERG	Ferguson Enterprises Inc.	12,000	$2,847,960
EWZ	iShares MSCI Brazil ETF	80,000	$2,760,000
BHF	Brighthouse Financial, Inc.	25,000	$1,582,500
FIX	Comfort Systems USA Inc	750	$1,486,462
IREN	IREN Ltd	30,000	$1,371,900
GEV	GE Vernova Inc.	1,000	$1,174,860
IGV	iShares Expanded Tech-Software Sector ETF	12,500	$1,132,500
RRC	Range Resources Corp	30,000	$1,115,700
EQT	EQT Corp	20,000	$1,063,400
SABR	Sabre Corp	400,000	$836,000
WMT	Walmart Inc.	7,264	$822,720
TWOD	Two Harbors Investment Corp.	32,776	$817,761
KRMN	Karman Holdings Inc.	15,000	$748,800
Q	Qnity Electronics, Inc.	4,000	$653,240
CORZ	Core Scientific, Inc.	25,000	$639,750
CIFR	Cipher Digital Inc.	25,000	$612,500
CSCO	Cisco Systems, Inc.	5,000	$587,300
CCK	Crown Holdings, Inc.	5,000	$559,100
AES	Aes Corp	35,000	$513,100
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

69 tracked positions · $401,973,397 total · filing declares 93 positions · $587,301,479 · as of Sep 30, 2026

All sectors Basic Materials Communication Services Consumer Cyclical Consumer Defensive Energy Financial Services Industrials Real Estate Technology Utilities

Showing 1–50 of 69 positions by value · page 1 of 2

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	% of Portfolio
IBIT	iShares Bitcoin Trust ETF	Held	3,129,352	0	$148,143,523	+42.2%	36.85%
QQQ	Invesco Qqq Trust, Series 1	Reduced	120,300	-1,306,500	$88,994,331	+353.4%	22.14%
HYG	iShares iBoxx $ High Yield Corporate Bond ETF PUT CALL + SHARES	Added	2,191,200	+266,600	$56,966,849	+2216.4%	14.17%
DPC	DPC Holdings PLC Industrials	NEW	806,988	NEW	$34,103,312	NEW	8.48%
RITM	Rithm Capital Corp. Real Estate	Added	1,373,683	+41,100	$12,266,989	−2.0%	3.05%
LQD	iShares iBoxx $ Investment Grade Corporate Bond ETF PUT + SHARES	Added	571,090	+412,490	$7,403,976	−57.2%	1.84%
MUB	iShares National Muni Bond ETF	Added	65,315	+19,861	$6,603,346	+35.0%	1.64%
OLN	OLIN Corp PUT + SHARES Basic Materials	Added	336,340	+82,340	$5,213,270	+683.4%	1.30%
VTEB	VANGUARD TAX-EXEMPT BOND INDEX FUND	NEW	110,000	NEW	$5,209,600	NEW	1.30%
CIM	Chimera Investment Corp Real Estate	Added	400,299	+21,400	$3,814,849	−24.5%	0.95%
RWT	Redwood Trust Inc Real Estate	Added	640,361	+90,000	$2,484,600	−4.8%	0.62%
JNK	State Street(R) SPDR(R) Bloomberg High Yield Bond ETF	NEW	23,000	NEW	$2,133,250	NEW	0.53%
IEI	iShares 3-7 Year Treasury Bond ETF	Reduced	18,461	-2,090	$2,094,215	−13.2%	0.52%
NVDA	Nvidia Corp PUT + SHARES Technology	NEW	57,500	NEW	$1,717,350	NEW	0.43%
MFA	Mfa Financial, Inc. Real Estate	Added	215,900	+5,900	$1,694,815	−16.7%	0.42%
TLT	iShares 20+ Year Treasury Bond ETF CALL + SHARES	Reduced	121,074	-147,006	$1,662,635	+2.5%	0.41%
CAT	Caterpillar Inc Industrials	Reduced	2,000	-13,500	$1,621,580	+105.2%	0.40%
PMT	PennyMac Mortgage Investment Trust Real Estate	Held	180,000	0	$1,418,400	−30.1%	0.35%
CARR	CARRIER GLOBAL Corp Industrials	Reduced	25,000	-25,000	$1,371,500	+8340.0%	0.34%
WIX	Wix.com Ltd. Technology	Held	17,144	0	$1,236,596	+59.0%	0.31%
IBP	Installed Building Products, Inc. Consumer Cyclical	NEW	6,000	NEW	$1,151,280	NEW	0.29%
DX	Dynex Capital Inc Real Estate	Held	95,000	0	$1,058,300	−15.0%	0.26%
PCG	PG&E Corp Utilities	NEW	80,000	NEW	$980,000	NEW	0.24%
SHY	iShares 1-3 Year Treasury Bond ETF	Reduced	11,444	-89,755	$929,252	−88.8%	0.23%
IEF	iShares 7-10 Year Treasury Bond ETF	Reduced	10,161	-12,435	$907,478	−57.5%	0.23%
GLW	Corning Inc Technology	Reduced	5,000	-9,000	$768,800	−78.5%	0.19%
NE	Noble Corp plc Energy	Added	15,000	+5,000	$626,100	+67.9%	0.16%
LUMN	Lumen Technologies, Inc. CALL + SHARES Communication Services	Reduced	160,000	-15,000	$613,100	−54.4%	0.15%
RTX	RTX Corp Industrials	NEW	3,000	NEW	$556,950	NEW	0.14%
SPY	Spdr S&P 500 ETF Trust PUT CALL	Added	460,000	+163,525	$534,500	−99.1%	0.13%
LECO	Lincoln Electric Holdings Inc Industrials	Reduced	2,000	-13,705	$529,160	−87.3%	0.13%
LMT	Lockheed Martin Corp Industrials	NEW	1,000	NEW	$509,250	NEW	0.13%
NOC	Northrop Grumman Corp Industrials	NEW	1,000	NEW	$483,480	NEW	0.12%
ENTG	Entegris Inc Technology	Reduced	3,000	-47,000	$462,180	−57.4%	0.11%
FOUR	Shift4 Payments, Inc. CALL + SHARES Technology	Reduced	150,000	-100,000	$449,200	−85.6%	0.11%
AMBP	Ardagh Metal Packaging S.A. Consumer Cyclical	NEW	100,000	NEW	$434,000	NEW	0.11%
TOL	Toll Brothers, Inc. Consumer Cyclical	Reduced	3,000	-7,000	$404,250	−75.5%	0.10%
IHRT	iHeartMedia, Inc. Communication Services	Added	186,753	+84,689	$392,181	−10.4%	0.10%
SLB	Slb Limited Energy	NEW	8,000	NEW	$389,760	NEW	0.10%
RIG	Transocean Ltd. Energy	NEW	70,000	NEW	$366,800	NEW	0.09%
AAL	American Airlines Group Inc. Industrials	NEW	25,000	NEW	$334,250	NEW	0.08%
QXO	QXO, Inc. PUT Industrials	NEW	300,000	NEW	$297,500	NEW	0.07%
UPS	United Parcel Service Inc PUT + SHARES Industrials	NEW	37,000	NEW	$277,255	NEW	0.07%
MITT	TPG Mortgage Investment Trust, Inc. Real Estate	Held	48,094	0	$275,578	−27.7%	0.07%
HWM	Howmet Aerospace Inc. Industrials	Reduced	1,000	-69,000	$226,180	−4.0%	0.06%
TROX	Tronox Holdings plc Basic Materials	NEW	50,000	NEW	$197,500	NEW	0.05%
META	Meta Platforms, Inc. PUT Communication Services	NEW	200,000	NEW	$193,800	NEW	0.05%
USAR	USA Rare Earth, Inc. Basic Materials	Reduced	10,000	-5,000	$140,800	−56.5%	0.04%
BXSL	Blackstone Secured Lending Fund PUT Financial Services	Held	325,000	0	$138,125	+30.8%	0.03%
GBDC	GOLUB CAPITAL BDC, Inc. PUT + SHARES Financial Services	Reduced	60,000	-140,000	$137,550	+57.2%	0.03%

Showing the top 50 of 69 positions. Create a free account to see every position, past quarters, search, filters and CSV export.

Covers the securities this platform tracks: U.S.-listed common stock and the put/call positions reported on it. A 13F can also report security types outside that coverage — preferred shares, bonds, warrants, untracked share classes — so the filing's own declared total can exceed the figures above. The source filing is linked at the top of this table.