MARINER INVESTMENT GROUP LLC — 13F Holdings & Portfolio
CIK 1096978 · latest 13F-HR filed 2026-05-05
MARINER INVESTMENT GROUP LLC manages $345.9M in 13F-reported U.S. long-equity assets across 108 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are IBIT (34.76%), BABAF (10.04%), FLR (8.96%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 23 new positions, exited 40, added to 16, and trimmed 8.
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.
$345.9M
Long-equity book
108
Distinct positions
2026-03-31
Filed 2026-05-05
+23 / −40 / ↑16 / ↓8
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- FLUOR CORP$13.8M +79.8%
- ISHARES BITCOIN TRUST ETF$13.7M +12.8%
- ALIBABA GROUP HLDG LTD$11.4M +48.8%
- SNOWFLAKE INC$10.3M +138.7%
- ISHARES TR$6.0M +2767.5%
Top Trims
- LINCOLN ELEC HLDGS INC-$2.3M -61.0%
- SHIFT4 PMTS INC-$1.5M -19.4%
- GRUPO AEROMEXICO SAB DE CV-$1.3M -36.2%
- MASTEC INC-$1.2M -38.8%
- REDWOOD TRUST INC-$1.0M -25.1%
New Positions
- GLOBAL PMTS INC$22.1M
- VANGUARD SCOTTSDALE FDS$4.1M
- CATERPILLAR INC$2.7M
- PENNYMAC MTG INVT TR$2.1M
- MFA FINL INC$2.0M
Exited Positions
- MICROSOFT CORP$166.4M
- LAM RESEARCH CORP$126.0M
- ALPHABET INC$109.8M
- COSTCO WHSL CORP NEW$107.8M
- CISCO SYS INC$105.7M
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 | $120.2M | 34.76% | 3,129,352 | SH |
| 2 | ALIBABA GROUP HLDG LTD | BABAF | 01609WBG6 | $34.7M | 10.04% | 25,000,000 | PRN |
| 3 | FLUOR CORP | FLR | 343412AJ1 | $31.0M | 8.96% | 25,100,000 | PRN |
| 4 | GLOBAL PMTS INC | GPN | 37940XAU6 | $22.1M | 6.38% | 25,000,000 | PRN |
| 5 | SNOWFLAKE INC | SNOW | 833445AB5 | $17.7M | 5.13% | 15,000,000 | PRN |
| 6 | RITHM CAPITAL CORP | RITM | 64828T201 | $12.6M | 3.65% | 1,332,583 | SH |
| 7 | ON SEMICONDUCTOR CORP | ON | 682189AU9 | $12.2M | 3.54% | 12,500,000 | PRN |
| 8 | LIVE NATION ENTERTAINMENT IN | LYV | 538034BA6 | $7.6M | 2.20% | 5,000,000 | PRN |
| 9 | SHIFT4 PMTS INC | FOUR | 82452J109 | $6.3M | 1.83% | 145,000 | SH |
| 10 | ISHARES TR | SHY | 464287457 | $6.3M | 1.81% | 75,817 | SH |
| 11 | LIVE NATION ENTERTAINMENT IN | LYV | 538034BC2 | $5.4M | 1.56% | 5,000,000 | PRN |
| 12 | STATE STR SPDR S&P 500 ETF T Put | SPY | 78462F103 | $5.1M | 1.48% | 755,000 | SH |
| 13 | CHIMERA INVT CORP | CIM | 16934Q802 | $4.8M | 1.37% | 378,899 | SH |
| 14 | ENTERGY CORP NEW | ETR | 29364G103 | $4.5M | 1.30% | 40,000 | SH |
| 15 | VANGUARD SCOTTSDALE FDS | VCSH | 92206C409 | $4.1M | 1.20% | 52,321 | SH |
| 16 | WILLIAMS COS INC | WMB | 969457100 | $3.3M | 0.95% | 45,000 | SH |
| 17 | REDWOOD TRUST INC | RWT | 758075402 | $3.1M | 0.89% | 550,361 | SH |
| 18 | CATERPILLAR INC | CAT | 149123101 | $2.7M | 0.78% | 3,800 | SH |
| 19 | GRUPO AEROMEXICO SAB DE CV | AERO | 40054J109 | $2.4M | 0.69% | 169,280 | SH |
| 20 | PENNYMAC MTG INVT TR | PMT | 70931T103 | $2.1M | 0.61% | 180,000 | SH |
| 21 | MFA FINL INC | MFA | 55272X607 | $2.0M | 0.58% | 210,000 | SH |
| 22 | MASTEC INC | MTZ | 576323109 | $1.9M | 0.56% | 6,000 | SH |
| 23 | REDWOOD TRUST INC | RWT | 758075AF2 | $1.8M | 0.53% | 1,800,000 | PRN |
| 24 | REDFIN CORP | — | 75737FAE8 | $1.6M | 0.46% | 1,645,000 | PRN |
| 25 | LINCOLN ELEC HLDGS INC | LECO | 533900106 | $1.5M | 0.43% | 6,000 | SH |
| 26 | RANGE RES CORP | RRC | 75281A109 | $1.4M | 0.39% | 30,000 | SH |
| 27 | EQT CORP | EQT | 26884L109 | $1.3M | 0.37% | 20,000 | SH |
| 28 | DYNEX CAP INC | DX | 26817Q886 | $1.2M | 0.35% | 95,000 | SH |
| 29 | SOLSTICE ADVANCED MATLS INC | SOLS | 83443Q103 | $1.1M | 0.33% | 15,000 | SH |
| 30 | PENNYMAC CORP | PMT | 70932AAH6 | $1.0M | 0.30% | 1,000,000 | PRN |
| 31 | ISHARES TR | IGV | 464287515 | $1.0M | 0.29% | 12,500 | SH |
| 32 | ISHARES TR | IEI | 464288661 | $905.9K | 0.26% | 7,638 | SH |
| 33 | WALMART INC | WMT | 931142103 | $902.8K | 0.26% | 7,264 | SH |
| 34 | ISHARES TR Put | HYG | 464288513 | $872.8K | 0.25% | 2,121,300 | SH |
| 35 | LEGENCE CORP | LGN | 52476L109 | $846.9K | 0.24% | 15,000 | SH |
| 36 | MICROCHIP TECHNOLOGY INC. | MCHP | 595017104 | $839.9K | 0.24% | 13,000 | SH |
| 37 | FS KKR CAP CORP Put | FSK | 302635206 | $832.5K | 0.24% | 700,000 | SH |
| 38 | WIX COM LTD | WIX | M98068105 | $810.6K | 0.23% | 9,000 | SH |
| 39 | STATE STR SPDR S&P 500 ETF T Call | SPY | 78462F103 | $680.6K | 0.20% | 630,000 | SH |
| 40 | MACOM TECH SOLUTIONS HLDGS I | MTSI | 55405Y100 | $666.2K | 0.19% | 3,000 | SH |
| 41 | BUILDERS FIRSTSOURCE INC Put | BLDR | 12008R107 | $649.8K | 0.19% | 115,000 | SH |
| 42 | QUANTA SVCS INC Call | PWR | 74762E102 | $586.5K | 0.17% | 30,000 | SH |
| 43 | LENNAR CORP Put | LEN | 526057104 | $551.0K | 0.16% | 123,500 | SH |
| 44 | COHERENT CORP Call | COHR | 19247G107 | $535.5K | 0.15% | 42,500 | SH |
| 45 | LUMEN TECHNOLOGIES INC | LUMN | 550241103 | $521.2K | 0.15% | 75,000 | SH |
| 46 | CROWN HLDGS INC | CCK | 228368106 | $501.2K | 0.14% | 5,000 | SH |
| 47 | WINGSTOP INC Put | WING | 974155103 | $498.9K | 0.14% | 32,500 | SH |
| 48 | D R HORTON INC Put | DHI | 23331A109 | $493.3K | 0.14% | 107,000 | SH |
| 49 | AES CORP | AES | 00130H105 | $493.1K | 0.14% | 35,000 | SH |
| 50 | NOBLE CORP PLC | NE | G65431127 | $490.7K | 0.14% | 10,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-05 | $345.9M | 108 | 0001096978-26-000005 |
| 2025-12-31 | 2026-02-25 | $1.71B | 111 | 0001096978-26-000004 |