MARINER INVESTMENT GROUP LLC — 13F Holdings & Portfolio
CIK 1096978 · latest 13F-HR filed 2026-07-27
MARINER INVESTMENT GROUP LLC manages $463.1M in 13F-reported U.S. long-equity assets across 124 reported positions as of its 2026-06-30 13F-HR filing. Its largest disclosed positions are IBIT (22.49%), SPY (12.33%), BABAF (7.65%). Quarter over quarter (versus its 2026-03-31 filing) the fund opened 29 new positions, exited 9, added to 23, and trimmed 10.
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.
NEW YORK, NY 10171
$463.1M
Long-equity book
124
Distinct positions
2026-06-30
Filed 2026-07-27
+29 / −9 / ↑23 / ↓10
vs 2026-03-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- LINCOLN ELEC HLDGS INC$2.7M +179.0%
- FLUOR CORP$2.3M +7.4%
- ISHARES TR$2.0M +32.7%
- ISHARES TR$1.5M +166.5%
- MASTEC INC$1.4M +72.4%
Top Trims
- ISHARES BITCOIN TRUST ETF-$16.1M -13.4%
- ON SEMICONDUCTOR CORP-$11.6M -95.1%
- SHIFT4 PMTS INC-$3.9M -61.6%
- REDWOOD TRUST INC-$478.8K -15.5%
- RANGE RES CORP-$239.7K -17.7%
New Positions
- STATE STR SPDR S&P 500 ETF T$57.1M
- DOORDASH INC$24.7M
- RIVIAN AUTOMOTIVE INC$16.0M
- AKAMAI TECHNOLOGIES INC$11.0M
- ISHARES TR$4.9M
Exited Positions
- SNOWFLAKE INC$17.7M
- LIVE NATION ENTERTAINMENT IN$7.6M
- CATERPILLAR INC$2.7M
- SOLSTICE ADVANCED MATLS INC$1.1M
- LEGENCE CORP$846.9K
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 | ISHARES BITCOIN TRUST ETF | IBIT | 46438F101 | $104.2M | 22.49% | 3,129,352 | SH |
| 2 | STATE STR SPDR S&P 500 ETF T | SPY | 78462F103 | $57.1M | 12.33% | 76,475 | SH |
| 3 | ALIBABA GROUP HLDG LTD | BABAF | 01609WBG6 | $35.4M | 7.65% | 30,000,000 | PRN |
| 4 | FLUOR CORP | FLR | 343412AJ1 | $33.3M | 7.19% | 25,100,000 | PRN |
| 5 | DOORDASH INC | DASH | 25809KAB1 | $24.7M | 5.32% | 25,000,000 | PRN |
| 6 | GLOBAL PMTS INC | GPN | 37940XAU6 | $22.5M | 4.86% | 25,000,000 | PRN |
| 7 | INVESCO QQQ TR Call | QQQ | 46090E103 | $19.5M | 4.21% | 1,400,000 | SH |
| 8 | RIVIAN AUTOMOTIVE INC | RIVN | 76954AAD5 | $16.0M | 3.46% | 15,000,000 | PRN |
| 9 | RITHM CAPITAL CORP | RITM | 64828T201 | $12.5M | 2.70% | 1,332,583 | SH |
| 10 | AKAMAI TECHNOLOGIES INC | AKAM | 00971TAQ4 | $11.0M | 2.37% | 7,500,000 | PRN |
| 11 | ISHARES TR | SHY | 464287457 | $8.3M | 1.79% | 101,199 | SH |
| 12 | LIVE NATION ENTERTAINMENT IN | LYV | 538034BC2 | $6.0M | 1.29% | 5,000,000 | PRN |
| 13 | CHIMERA INVT CORP | CIM | 16934Q802 | $5.1M | 1.09% | 378,899 | SH |
| 14 | ISHARES TR | MUB | 464288414 | $4.9M | 1.06% | 45,454 | SH |
| 15 | ENTERGY CORP NEW | ETR | 29364G103 | $4.6M | 0.99% | 40,000 | SH |
| 16 | VANGUARD SCOTTSDALE FDS | VCSH | 92206C409 | $4.2M | 0.91% | 53,317 | SH |
| 17 | LINCOLN ELEC HLDGS INC | LECO | 533900106 | $4.2M | 0.90% | 15,705 | SH |
| 18 | WILLIAMS COS INC | WMB | 969457100 | $4.1M | 0.88% | 55,000 | SH |
| 19 | CORNING INC | GLW | 219350105 | $3.6M | 0.77% | 14,000 | SH |
| 20 | SHIFT4 PMTS INC | FOURPA | 82452J307 | $3.4M | 0.74% | 55,000 | SH |
| 21 | MASTEC INC | MTZ | 576323109 | $3.3M | 0.72% | 8,000 | SH |
| 22 | GRUPO AEROMEXICO SAB DE CV | AERO | 40054J109 | $3.0M | 0.66% | 169,280 | SH |
| 23 | FERGUSON ENTERPRISES INC | FERG | 31488V107 | $2.8M | 0.61% | 12,000 | SH |
| 24 | ISHARES INC | EWZ | 464286400 | $2.8M | 0.60% | 80,000 | SH |
| 25 | REDWOOD TRUST INC | RWT | 758075402 | $2.6M | 0.56% | 550,361 | SH |
| 26 | COHERENT CORP Call | COHR | 19247G107 | $2.4M | 0.53% | 36,500 | SH |
| 27 | SHIFT4 PMTS INC | FOUR | 82452J109 | $2.4M | 0.53% | 50,000 | SH |
| 28 | ISHARES TR | IEI | 464288661 | $2.4M | 0.52% | 20,551 | SH |
| 29 | CIENA CORP Call | CIEN | 171779309 | $2.1M | 0.46% | 36,000 | SH |
| 30 | ISHARES TR | IEF | 464287440 | $2.1M | 0.46% | 22,596 | SH |
| 31 | PENNYMAC CORP | PMT | 70932AAH6 | $2.0M | 0.44% | 2,000,000 | PRN |
| 32 | MFA FINL INC | MFA | 55272X607 | $2.0M | 0.44% | 210,000 | SH |
| 33 | PENNYMAC MTG INVT TR | PMT | 70931T103 | $2.0M | 0.44% | 180,000 | SH |
| 34 | ISHARES TR | HYG | 464288513 | $2.0M | 0.42% | 24,600 | SH |
| 35 | REDWOOD TRUST INC | RWT | 758075AF2 | $1.8M | 0.39% | 1,800,000 | PRN |
| 36 | TOLL BROTHERS INC | TOL | 889478103 | $1.6M | 0.36% | 10,000 | SH |
| 37 | REDFIN CORP | RKT | 75737FAE8 | $1.6M | 0.34% | 1,645,000 | PRN |
| 38 | BRIGHTHOUSE FINL INC | BHF | 10922N103 | $1.6M | 0.34% | 25,000 | SH |
| 39 | ISHARES TR | TLT | 464287432 | $1.6M | 0.34% | 18,080 | SH |
| 40 | QNITY ELECTRONICS INC Call | Q | 74743L100 | $1.6M | 0.34% | 100,000 | SH |
| 41 | COMFORT SYS USA INC | FIX | 199908104 | $1.5M | 0.32% | 750 | SH |
| 42 | IREN LIMITED | IREN | Q4982L109 | $1.4M | 0.30% | 30,000 | SH |
| 43 | LUMEN TECHNOLOGIES INC | LUMN | 550241103 | $1.3M | 0.29% | 175,000 | SH |
| 44 | DYNEX CAP INC | DX | 26817Q886 | $1.2M | 0.27% | 95,000 | SH |
| 45 | GE VERNOVA INC | GEV | 36828A101 | $1.2M | 0.25% | 1,000 | SH |
| 46 | ISHARES TR | IGV | 464287515 | $1.1M | 0.24% | 12,500 | SH |
| 47 | RANGE RES CORP | RRC | 75281A109 | $1.1M | 0.24% | 30,000 | SH |
| 48 | ENTEGRIS INC Call | ENTG | 29362U104 | $1.1M | 0.23% | 50,000 | SH |
| 49 | EQT CORP | EQT | 26884L109 | $1.1M | 0.23% | 20,000 | SH |
| 50 | LYONDELLBASELL INDUSTRIES NV Put | LYB | N53745950 | $1.0M | 0.23% | 200,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-06-30 | 2026-07-27 | $463.1M | 124 | 0001096978-26-000006 |
| 2026-03-31 | 2026-05-05 | $345.9M | 108 | 0001096978-26-000005 |
| 2025-12-31 | 2026-02-25 | $1.71B | 111 | 0001096978-26-000004 |