MARINER INVESTMENT GROUP LLC

Registered adviser

CIK

1096978

Location

NEW YORK, NY

Portfolio Value

Small $321,355,897

Diversification

Moderately concentrated

Filing Date

Global Rank

#5,043 / 8,818 ▲ 493

Top Industry

REIT - Mortgage 28.9%

3Y Alpha vs SPY

-8.6%

Period ended 4 months ago

Filed Jul 27, 2026 · 3mo

24 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, Oct 1, 2026

Form ADV adviser

CRD 124744

Roster of Oct 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 Oct 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 Oct 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, 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 66.0% 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

98 tracked positions · as of Jun 30, 2026 · Δ vs Mar 31, 2026

Top Position

32.4%

−18.6 pts

Top 5

72.8%

−1.1 pts

Top 10

79.7%

−3.8 pts

HHI

1,601

Moderately concentrated−1,195

Portfolio Trend

24 quarters · across all stocks

Sector Breakdown

As of Jun 30, 2026

Sector	% Portfolio	Value	Positions
Unclassified	71.1%	$228,560,346	17
Real Estate	8.4%	$26,846,798	9
Technology	6.4%	$20,565,786	20
Industrials	6.1%	$19,692,998	13
Energy	2.2%	$7,122,650	5
Utilities	1.6%	$5,107,500	2
Financial Services	1.5%	$4,858,964	12
Consumer Cyclical	1.0%	$3,213,848	8
Communication Services	0.7%	$2,151,954	3
Basic Materials	0.7%	$2,146,083	6
Consumer Defensive	0.3%	$1,088,970	3

Last Quarter's Activity

Export CSV

Jun 30, 2026 vs Mar 31, 2026

Added To

Positions the filer increased

13 positions

Ticker	Company	Δ Shares	Shares	Value
LUMN	Lumen Technologies, Inc.	+100,000	175,000	$1,344,000
IHRT	iHeartMedia, Inc.	+38,886	102,064	$437,854
SHY	iShares 1-3 Year Treasury Bond ETF	+25,382	101,199	$8,309,449
IEI	iShares 3-7 Year Treasury Bond ETF	+12,913	20,551	$2,413,714
XPRO	Expro Ltd	+10,000	30,000	$443,100
KRMN	Karman Holdings Inc.	+10,000	15,000	$748,800
WMB	Williams Companies, Inc.	+10,000	55,000	$4,088,700
LECO	Lincoln Electric Holdings Inc	+9,705	15,705	$4,169,834
WIX	Wix.com Ltd.	+8,144	17,144	$777,823
TDS	Telephone & Data Systems Inc	+5,000	10,000	$370,100
CORZ	Core Scientific, Inc.	+5,000	25,000	$639,750
MTZ	Mastec Inc	+2,000	8,000	$3,328,480
VCSH	VANGUARD SHORT-TERM CORPORATE BOND INDEX FUND	+996	53,317	$4,213,642
No positions match the current search.

Trimmed

Positions the filer reduced

3 positions

Ticker	Company	Δ Shares	Shares	Value
FOUR	Shift4 Payments, Inc.	−95,000	50,000	$2,432,000
WOLF	Wolfspeed, Inc.	−15,000	10,000	$482,500
PMTS	CPI Card Group Inc.	−5,000	13,050	$271,179
No positions match the current search.

New Positions

Positions the filer opened this quarter

25 positions

Ticker	Company	Shares	Value
SPY	Spdr S&P 500 ETF Trust	76,475	$57,109,235
MUB	iShares National Muni Bond ETF	45,454	$4,891,759
GLW	Corning Inc	14,000	$3,576,020
FERG	Ferguson Enterprises Inc.	12,000	$2,847,960
EWZ	iShares MSCI Brazil ETF	80,000	$2,760,000
IEF	iShares 7-10 Year Treasury Bond ETF	22,596	$2,136,903
HYG	iShares iBoxx $ High Yield Corporate Bond ETF	24,600	$1,967,262
TOL	Toll Brothers, Inc.	10,000	$1,647,500
BHF	Brighthouse Financial, Inc.	25,000	$1,582,500
TLT	iShares 20+ Year Treasury Bond ETF	18,080	$1,562,473
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
SABR	Sabre Corp	400,000	$836,000
Q	Qnity Electronics, Inc.	4,000	$653,240
CIFR	Cipher Digital Inc.	25,000	$612,500
CSCO	Cisco Systems, Inc.	5,000	$587,300
CRWV	CoreWeave, Inc.	5,000	$497,700
FLEX	Flex Ltd.	3,000	$486,210
MCD	Mcdonalds Corp	1,500	$405,465
USAR	USA Rare Earth, Inc.	15,000	$323,700
AVEX	AEVEX Corp.	13,528	$282,599
TSEM	Tower Semiconductor Ltd	1,000	$260,640
ENPH	Enphase Energy, Inc.	5,000	$246,200
—		10,000	$21,800
No positions match the current search.

Sold Out

Positions the filer fully exited

6 positions

Ticker	Company	Shares	Value
CAT	Caterpillar Inc	3,800	$2,692,148
SOLS	Solstice Advanced Materials Inc.	15,000	$1,142,400
LGN	Legence Corp.	15,000	$846,900
MCHP	Microchip Technology Inc	13,000	$839,930
MTSI	MACOM Technology Solutions Holdings, Inc.	3,000	$666,210
WING	Wingstop Inc.	1,000	$154,970
No positions match the current search.

Portfolio Positions

Compact Export CSV View 13F filing

98 tracked positions · $321,355,897 total · filing declares 124 positions · $463,109,047 · as of Jun 30, 2026

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

Showing 1–50 of 98 positions by value · page 1 of 2

Ticker	Company	Type	Shares	Δ Shares	Value (USD)	% Δ Value	Held (qtrs)	Est. cost/share	% of Portfolio
IBIT	iShares Bitcoin Trust ETF	Held	3,129,352	0	$104,176,128	−13.4%	5	$55.47	32.42%
SPY	Spdr S&P 500 ETF Trust PUT CALL + SHARES	Reduced	296,475	-1,088,525	$57,417,190	+888.1%	1	$725.01	17.87%
QQQ	Invesco Qqq Trust, Series 1 PUT CALL	NEW	1,426,800	NEW	$19,626,224	NEW	—	—	6.11%
LQD	iShares iBoxx $ Investment Grade Corporate Bond ETF PUT	NEW	158,600	NEW	$17,298,502	NEW	—	—	5.38%
RITM	Rithm Capital Corp. Real Estate	Held	1,332,583	0	$12,512,954	−0.9%	5	$11.51	3.89%
SHY	iShares 1-3 Year Treasury Bond ETF	Added	101,199	+25,382	$8,309,449	+32.7%	3	unpriced	2.59%
CIM	Chimera Investment Corp Real Estate	Held	378,899	0	$5,054,512	+6.3%	4	$13.15	1.57%
MUB	iShares National Muni Bond ETF	NEW	45,454	NEW	$4,891,759	NEW	1	unpriced	1.52%
ETR	Entergy Corp Utilities	Held	40,000	0	$4,594,400	+2.2%	7	unpriced	1.43%
VCSH	VANGUARD SHORT-TERM CORPORATE BOND INDEX FUND	Added	53,317	+996	$4,213,642	+1.6%	2	$79.68	1.31%
LECO	Lincoln Electric Holdings Inc Industrials	Added	15,705	+9,705	$4,169,834	+179.0%	5	$244.05	1.30%
WMB	Williams Companies, Inc. CALL + SHARES Energy	Added	105,000	+10,000	$4,127,450	+20.3%	6	$61.10	1.28%
GLW	Corning Inc Technology	Reduced	14,000	-16,000	$3,576,020	+1609.0%	1	$181.94	1.11%
MTZ	Mastec Inc Industrials	Added	8,000	+2,000	$3,328,480	+72.4%	5	$247.52	1.04%
FOUR	Shift4 Payments, Inc. PUT CALL + SHARES Technology	Reduced	250,000	-220,000	$3,114,500	−55.5%	4	$75.44	0.97%
AERO	Grupo Aeromexico, S.A.B. de C.V. Industrials	Held	169,280	0	$3,047,040	+28.5%	3	$19.16	0.95%
FERG	Ferguson Enterprises Inc. Industrials	NEW	12,000	NEW	$2,847,960	NEW	1	$241.26	0.89%
EWZ	iShares MSCI Brazil ETF	NEW	80,000	NEW	$2,760,000	NEW	1	$37.37	0.86%
RWT	Redwood Trust Inc Real Estate	Held	550,361	0	$2,608,711	−15.5%	6	$6.04	0.81%
HYG	iShares iBoxx $ High Yield Corporate Bond ETF PUT + SHARES	Reduced	1,924,600	-196,700	$2,459,262	+181.8%	1	unpriced	0.77%
COHR	Coherent Corp. CALL Technology	Reduced	36,500	-6,000	$2,440,025	+355.7%	—	—	0.76%
IEI	iShares 3-7 Year Treasury Bond ETF	Added	20,551	+12,913	$2,413,714	+166.5%	2	unpriced	0.75%
Q	Qnity Electronics, Inc. CALL + SHARES Technology	Added	104,000	+54,000	$2,208,240	+1463.4%	1	$147.29	0.69%
CIEN	Ciena Corp CALL Technology	NEW	36,000	NEW	$2,142,000	NEW	—	—	0.67%
IEF	iShares 7-10 Year Treasury Bond ETF	NEW	22,596	NEW	$2,136,903	NEW	1	unpriced	0.66%
MFA	Mfa Financial, Inc. Real Estate	Held	210,000	0	$2,034,900	+1.1%	2	$9.86	0.63%
PMT	PennyMac Mortgage Investment Trust Real Estate	Held	180,000	0	$2,030,400	−3.3%	2	$12.33	0.63%
GEV	GE Vernova Inc. CALL + SHARES Industrials	NEW	11,000	NEW	$2,020,860	NEW	1	$1,020.67	0.63%
TOL	Toll Brothers, Inc. Consumer Cyclical	NEW	10,000	NEW	$1,647,500	NEW	1	$142.24	0.51%
TLT	iShares 20+ Year Treasury Bond ETF CALL + SHARES	NEW	268,080	NEW	$1,622,473	NEW	1	unpriced	0.50%
BHF	Brighthouse Financial, Inc. Financial Services	NEW	25,000	NEW	$1,582,500	NEW	1	$62.19	0.49%
FIX	Comfort Systems USA Inc Industrials	NEW	750	NEW	$1,486,462	NEW	1	$1,814.55	0.46%
IREN	IREN Ltd Financial Services	NEW	30,000	NEW	$1,371,900	NEW	1	$51.99	0.43%
LUMN	Lumen Technologies, Inc. Communication Services	Added	175,000	+100,000	$1,344,000	+157.8%	7	$7.10	0.42%
DX	Dynex Capital Inc Real Estate	Held	95,000	0	$1,245,450	+2.7%	2	$13.75	0.39%
IGV	iShares Expanded Tech-Software Sector ETF	Held	12,500	0	$1,132,500	+13.2%	2	unpriced	0.35%
RRC	Range Resources Corp Energy	Held	30,000	0	$1,115,700	−17.7%	8	$36.43	0.35%
ENTG	Entegris Inc CALL Technology	Added	50,000	+25,000	$1,085,000	+1105.6%	—	—	0.34%
EQT	EQT Corp Energy	Held	20,000	0	$1,063,400	−16.5%	3	$56.19	0.33%
SABR	Sabre Corp Technology	NEW	400,000	NEW	$836,000	NEW	1	$1.75	0.26%
WMT	Walmart Inc. Consumer Defensive	Reduced	7,264	-22,700	$822,720	−10.2%	2	$122.77	0.26%
TWOD	Two Harbors Investment Corp. Real Estate	Held	32,776	0	$817,761	+0.6%	2	unpriced	0.25%
CAT	Caterpillar Inc CALL Industrials	Added	15,500	+6,700	$790,113	−71.2%	—	—	0.25%
WIX	Wix.com Ltd. Technology	Added	17,144	+8,144	$777,823	−4.0%	2	$73.26	0.24%
KRMN	Karman Holdings Inc. CALL + SHARES Industrials	Added	33,000	+28,000	$765,900	+91.4%	2	$75.25	0.24%
OLN	OLIN Corp PUT Basic Materials	Added	254,000	+18,000	$665,450	+292.1%	—	—	0.21%
CORZ	Core Scientific, Inc. Technology	Added	25,000	+5,000	$639,750	+113.8%	2	$18.35	0.20%
DOW	Dow Inc. PUT Basic Materials	Added	268,500	+63,500	$620,733	+788.7%	—	—	0.19%
CIFR	Cipher Digital Inc. Technology	NEW	25,000	NEW	$612,500	NEW	1	$21.10	0.19%
PWR	Quanta Services, Inc. CALL Industrials	Held	30,000	0	$607,500	+3.6%	—	—	0.19%

Showing the top 50 of 98 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.