CSS LLC/IL
Long book
$795.7M
Q1 2026
Positions
652
Top-10 weight
22%
concentration
Last quarter
+5.6%
SPY +14.8%
Turnover
40%
of book per quarter
Strategy in plain words
auto-generated from filingsCSS LLC/IL is an institutional manager, running a $795.7M US long book across 652 positions.
The portfolio is broadly diversified across 652 positions (top 10 only 22%). The portfolio is actively managed, with meaningful quarterly turnover. Current anchor positions: NEXTERA ENERGY INC, INVESCO S&P 500 EQUAL WEIGHT, VANGUARD S&P 500 ETF, CORE SCIENTIFIC INC - 27, ALBEMARLE CORP.
Over the last 9 quarters its long book ran on average 1.1pp per quarter behind the S&P 500, beating the index in 4 of 9 quarters. Signal value of individual moves is limited — treat changes as weak evidence.
Implied long-book return vs S&P 500
methodology: positions priced quarterly, no shorts/options Fund long book S&P 500
Q1 2024
-1.7%
Q2 2024
+6.2%
Q3 2024
+4.8%
Q4 2024
-4.9%
Q1 2025
+10.5%
Q2 2025
+6.3%
Q3 2025
+3.0%
Q4 2025
+0.8%
Q1 2026
+5.6%
Sector allocation
Financials 29%
Other 16%
Technology 9%
Healthcare 9%
Utilities 7%
Services media 7%
Industrials 7%
Materials 4%
Long book by quarter
What does CSS LLC/IL own?
Q1 2026 13F| Company | Sector | Shares | Value | % of book | Change |
|---|---|---|---|---|---|
| NEE NEXTERA ENERGY INC | Utilities | 540.7K | $27.2M | 3.4% | New |
| ALB ALBEMARLE CORP | Materials | 250.4K | $17.9M | 2.3% | +402.4% |
| APO 6.75 07/31/26 APOLLO GLOBAL MANAGEMENT | — | 277.3K | $16.3M | 2.0% | +2089.6% |
| KIM KIMCO REALTY CORP | Real estate | 237.1K | $14.2M | 1.8% | +18.5% |
| BAC 7.25 PERP L BANK OF AMERICA CORP | — | 10.3K | $12.3M | 1.5% | -56.4% |
| PEN PENUMBRA INC | Healthcare | 36.1K | $11.9M | 1.5% | New |
| KMI 4.75 03/31/28 EL PASO ENERGY CAP TRST | — | 226.7K | $11.6M | 1.5% | +919.7% |
| HO1 HOLOGIC INC | — | 118.0K | $8.9M | 1.1% | +652.7% |
| HPE 7.625 09/01/27 HP ENTERPRISE CO | — | 114.5K | $7.5M | 0.9% | +603.2% |
| TACH TITAN ACQUISITION CORP-CL A | Financials | 708.3K | $7.3M | 0.9% | Held |
| IRHO IRON HORSE ACQUISITIONS CORP | Services media | 737.6K | $7.3M | 0.9% | New |
| WDC WESTERN DIGITAL CORP | Technology | 25.4K | $6.9M | 0.9% | -36.1% |
| WENN WEN ACQUISITION CORP-A | Financials | 647.6K | $6.6M | 0.8% | Held |
| IONS IONIS PHARMACEUTICALS INC | Healthcare | 79.1K | $5.9M | 0.7% | New |
| LKSP LAKE SUPERIOR ACQUISITI-CL A | Financials | 465.6K | $4.7M | 0.6% | 0.0% |
| IPCX INFLECTION POINT ACQUISITI-A | Financials | 454.4K | $4.6M | 0.6% | Held |
| FOUR SHIFT4 PAYMENTS INC | Services media | 82.0K | $4.5M | 0.6% | +194.0% |
| DBRG DIGITALBRIDGE GROUP INC | Financials | 262.2K | $4.0M | 0.5% | New |
| MESH MESHFLOW ACQUISITION CO-CL A | Financials | 396.5K | $3.9M | 0.5% | New |
| BCSS BAIN CAPITAL GSS INV- A | Financials | 387.4K | $3.9M | 0.5% | New |
| PTOR PRAETORIAN ACQUISITION COR-A | Financials | 397.1K | $3.9M | 0.5% | New |
| LLYVA LIBERTY LIVE HOLDINGS-A | Services media | 41.8K | $3.8M | 0.5% | Held |
| DAAQ DIGITAL ASSET ACQUISITI-CL A | Financials | 368.6K | $3.8M | 0.5% | +1839.9% |
| TACO BERTO ACQUISITION CORP | Financials | 364.9K | $3.7M | 0.5% | Held |
| FGMC FG MERGER II CORP | Financials | 352.1K | $3.6M | 0.4% | Held |
| RDAG REPUBLIC DIGITAL ACQUIS-CL A | Financials | 346.0K | $3.5M | 0.4% | Held |
| LPBB LAUNCH TWO ACQUISITION- CL A | Financials | 328.6K | $3.5M | 0.4% | Held |
| BRR PROCAP FINANCIAL INC | Financials | 1.5M | $3.3M | 0.4% | Held |
| ORCL ORACLE CORP | Technology | 67.6K | $3.1M | 0.4% | New |
| FIGX FIGX CAPITAL ACQUISITION C-A | Financials | 299.8K | $3.0M | 0.4% | Held |
| NEE NEXTERA ENERGY INC | Utilities | 48.5K | $2.7M | 0.3% | New |
| FERA FIFTH ERA ACQUISITION CORP-A | Financials | 264.7K | $2.7M | 0.3% | Held |
| CHPG CHAMPIONSGATE ACQUISITIO-A | Financials | 260.9K | $2.7M | 0.3% | -4.5% |
| CVX CHEVRON CORP | Energy | 12.5K | $2.6M | 0.3% | -10.7% |
| MEVO M EVO GLOBAL ACQUISITIO-CL A | Financials | 261.4K | $2.6M | 0.3% | New |
| MTSI MACOM TECHNOLOGY SOLUTIONS H | Technology | 11.2K | $2.5M | 0.3% | +24.7% |
| XCBE X3 ACQUISITION CORP LTD-CL A | Financials | 250.0K | $2.5M | 0.3% | New |
| DBCA D. BORAL ACQUISITION I-CL A | Financials | 248.0K | $2.4M | 0.3% | New |
| SM SM ENERGY CO | Energy | 77.0K | $2.4M | 0.3% | +651.7% |
| BHF BRIGHTHOUSE FINANCIAL INC | Financials | 39.0K | $2.3M | 0.3% | +52.9% |
| BE BLOOM ENERGY CORP- A | Industrials | 17.1K | $2.3M | 0.3% | -55.4% |
| MTDR MATADOR RESOURCES CO | Energy | 35.2K | $2.2M | 0.3% | +198.0% |
| GTLS CHART INDUSTRIES INC | Industrials | 10.5K | $2.2M | 0.3% | +200.0% |
| PACH PIONEER ACQUISITION I-CL A | Financials | 211.0K | $2.1M | 0.3% | -0.7% |
| BDCI BTC DEVELOPMENT CORP-CL A | Financials | 203.2K | $2.0M | 0.3% | New |
| SVIV SPRING VALLEY ACQUISITIO-A | Financials | 195.1K | $1.9M | 0.2% | New |
| EA ELECTRONIC ARTS INC | Technology | 9.4K | $1.9M | 0.2% | +3033.3% |
| MLAA MOUNTAIN LAKE ACQUISITI-CL A | Financials | 190.2K | $1.9M | 0.2% | New |
| AL AIR LEASE CORP | — | 28.8K | $1.9M | 0.2% | +89.2% |
| FL3 REAL ASSET ACQUISITION | — | 177.7K | $1.9M | 0.2% | -54.1% |
13F filing history
| Period | Form | Filed | Entries | Reported value | Flags | Source |
|---|---|---|---|---|---|---|
| Q1 2026 | 13F-HR | May 15, 2026 | 961 | $2.09B | canonical | SEC ↗ |
| Q4 2025 | 13F-HR | Feb 17, 2026 | 999 | $2.25B | canonical | SEC ↗ |
| Q3 2025 | 13F-HR | Nov 13, 2025 | 985 | $2.23B | canonical | SEC ↗ |
| Q2 2025 | 13F-HR | Aug 14, 2025 | 953 | $2.14B | canonical | SEC ↗ |
| Q1 2025 | 13F-HR | May 15, 2025 | 909 | $1.82B | canonical | SEC ↗ |
| Q4 2024 | 13F-HR | Feb 18, 2025 | 955 | $2.27B | canonical | SEC ↗ |
| Q3 2024 | 13F-HR | Nov 14, 2024 | 820 | $2.19B | canonical | SEC ↗ |
| Q2 2024 | 13F-HR | Aug 14, 2024 | 875 | $1.96B | canonical | SEC ↗ |
| Q1 2024 | 13F-HR | May 15, 2024 | 806 | $1.73B | canonical | SEC ↗ |
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