Quick Takeaways
- CSS LLC/IL reports institutional holdings through Form 13F filings.
- Latest reported quarter: Q4 2025.
- Latest reported holdings value: $1,768,241,295.
13F Filings History of CSS LLC/IL
- Latest 13F report
- Q4 2025 - 17 Feb 2026
- Value $
- $1,768,241,295
- Signature - Title
- Mitchel Bialek - CCO
- Location
- Chicago, IL
- Summary
- This page shows a list of all the recent 13F filings made by CSS LLC/IL. Form 13F is required to be filed within 45 days of the end of a calendar quarter. CSS LLC/IL reported 751 stock holdings with total value $1,768,241,295 as of Q4 2025. Top holdings included ECHOSTAR CORP, LUMENTUM HLDGS INC, JAZZ INVESTMENTS I LTD, IONIS PHARMACEUTICALS INC, and PEABODY ENGR CORP.
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Holdings Value
What Changed
- Most recent filing was accepted on 17 Feb 2026, 13:08.
- Reported value moved from $1,679,703,402 to $1,768,241,295.
Why This Matters
- This gives a plain-language read of holdings direction before you open full quarter tables.
- Use the filing links below to verify the exact SEC source document.
Source Evidence
Backed by Form 13F
See Original Filing
Portfolio holdings and changes are grounded in SEC Form 13F filings.
| Quarter | Holdings | Value $ | Bought | Sold | Net | Top Holdings | Form Type | Filing Time |
|---|---|---|---|---|---|---|---|---|
| Q4 2025 | 751 | $1,768,241,295 | +$592,503,942 | -$569,677,181 | +$22,826,761 | ECHOSTAR CORP, LUMENTUM HLDGS INC, JAZZ INVESTMENTS I LTD, IONIS PHARMACEUTICALS INC, PEABODY ENGR CORP | 13F-HR | 17 Feb 2026, 13:08 |
| Q3 2025 | 691 | $1,679,703,402 | +$671,118,926 | -$658,712,756 | +$12,406,170 | STRIDE INC, IONIS PHARMACEUTICALS INC, LIVE NATION ENTERTAINMENT IN, JAZZ INVESTMENTS I LTD, LUMENTUM HLDGS INC | 13F-HR | 13 Nov 2025, 12:00 |
| Q2 2025 | 673 | $1,580,351,072 | +$662,840,349 | -$593,638,540 | +$69,201,809 | STRIDE INC, IONIS PHARMACEUTICALS INC, JAZZ INVESTMENTS I LTD, SHIFT4 PMTS INC, SEAGATE HDD CAYMAN | 13F-HR | 14 Aug 2025, 15:44 |
| Q1 2025 | 630 | $1,433,875,508 | +$407,850,142 | -$608,256,838 | -$200,406,696 | AMERICAN AIRLINES GROUP INC, STRIDE INC, INSMED INC, JAZZ INVESTMENTS I LTD, IONIS PHARMACEUTICALS INC | 13F-HR | 15 May 2025, 15:55 |
| Q4 2024 | 639 | $1,678,724,402 | +$556,662,886 | -$641,399,885 | -$84,736,999 | AXON ENTERPRISE INC, AMERICAN AIRLINES GROUP INC, STRIDE INC, GTLSPRB, PEABODY ENGR CORP | 13F-HR | 14 Feb 2025, 17:58 |
| Q3 2024 | 596 | $1,718,577,821 | +$700,249,234 | -$390,048,877 | +$310,200,357 | AXON ENTERPRISE INC, CCL, AMERICAN AIRLINES GROUP INC, MACOM TECH SOLUTIONS HLDGS I, STRIDE INC | 13F-HR | 14 Nov 2024, 16:06 |
| Q2 2024 | 571 | $1,357,520,698 | +$391,060,772 | -$282,792,748 | +$108,268,024 | ROYAL CARIBBEAN GROUP, AMERICAN AIRLINES GROUP INC, MACOM TECH SOLUTIONS HLDGS I, AXON ENTERPRISE INC, PEABODY ENGR CORP | 13F-HR | 14 Aug 2024, 13:54 |
| Q1 2024 | 566 | $1,232,643,719 | +$346,062,431 | -$436,711,984 | -$90,649,553 | ROYAL CARIBBEAN GROUP, AMERICAN AIRLINES GROUP INC, MACOM TECH SOLUTIONS HLDGS I, PEABODY ENGR CORP, IONIS PHARMACEUTICALS INC | 13F-HR | 15 May 2024, 14:46 |
| Q4 2023 | 538 | $1,148,435,558 | +$358,907,150 | -$325,113,103 | +$33,794,047 | NE, AMERICAN AIRLINES GROUP INC, MACOM TECH SOLUTIONS HLDGS I, PEABODY ENGR CORP, IONIS PHARMACEUTICALS INC | 13F-HR | 14 Feb 2024, 12:56 |
| Q3 2023 | 567 | $1,200,246,101 | +$395,578,351 | -$481,351,174 | -$85,772,823 | ROYAL CARIBBEAN GROUP, NE, AMERICAN AIRLINES GROUP INC, CARNIVAL CORP, PEABODY ENGR CORP | 13F-HR | 14 Nov 2023, 14:06 |
| Q2 2023 | 595 | $1,297,890,202 | +$386,522,925 | -$459,969,944 | -$73,447,019 | DEXCOM INC, NE, AMERICAN AIRLINES GROUP INC, CARNIVAL CORP, PCGU | 13F-HR | 14 Aug 2023, 15:00 |
| Q1 2023 | 564 | $1,316,899,333 | +$416,209,805 | -$643,637,381 | -$227,427,576 | DEXCOM INC, PCGU, NE, CARNIVAL CORP, MARRIOTT VACATIONS WORLDWIDE | 13F-HR | 15 May 2023, 15:16 |
| Q4 2022 | 698 | $1,532,273,172 | +$475,159,223 | -$761,687,779 | -$286,528,556 | DEXCOM INC, PCGU, CHK, ATLAS AIR WORLDWIDE HLDGS IN, NE | 13F-HR | 14 Feb 2023, 14:51 |
| Q3 2022 | 752 | $1,723,998,000 | +$504,821,920 | -$877,052,297 | -$372,230,377 | ANTERO RESOURCES CORP, DEXCOM INC, GFLU, ATLAS AIR WORLDWIDE HLDGS IN, PCGU | 13F-HR | 14 Nov 2022, 16:21 |
| Q2 2022 | 828 | $2,073,934,188 | +$630,080,794 | -$674,152,709 | -$44,071,915 | AVGOP, ANTERO RESOURCES CORP, DEXCOM INC, GFLU, PCGU | 13F-HR | 15 Aug 2022, 14:13 |
| Q1 2022 | 888 | $2,373,587,000 | +$844,967,093 | -$717,979,602 | +$126,987,491 | AVGOP, DEXCOM INC, ANTERO RESOURCES CORP, GFLU, PCGU | 13F-HR | 16 May 2022, 14:50 |
| Q4 2021 | 980 | $2,254,212,000 | +$964,737,811 | -$600,467,122 | +$364,270,689 | AVGOP, DEXCOM INC, ANTERO RESOURCES CORP, WAYFAIR INC, NEEPRO | 13F-HR | 14 Feb 2022, 13:04 |
| Q3 2021 | 932 | $1,876,156,000 | +$615,553,357 | -$616,005,409 | -$452,052 | DEXCOM INC, WAYFAIR INC, NEEPRO, ANTERO RESOURCES CORP, CHEGG INC | 13F-HR | 15 Nov 2021, 15:27 |
| Q2 2021 | 834 | $1,850,015,000 | +$641,167,747 | -$653,961,853 | -$12,794,106 | DEXCOM INC, WAYFAIR INC, CHEGG INC, GFLU, NEEPRO | 13F-HR | 16 Aug 2021, 16:01 |
| Q1 2021 | 704 | $1,855,138,000 | +$941,280,179 | -$818,775,885 | +$122,504,294 | WAYFAIR INC, DEXCOM INC, AAL, CFXA, GFLU | 13F-HR | 17 May 2021, 13:58 |
| Q4 2020 | 561 | $1,657,966,000 | +$807,145,236 | -$645,876,279 | +$161,268,957 | MONGODB INC, DEXCOM INC, WAYFAIR INC, DD, PCGU | 13F-HR | 16 Feb 2021, 14:01 |
| Q3 2020 | 510 | $1,334,659,000 | +$611,966,113 | -$527,847,089 | +$84,119,024 | DHRPRA, MONGODB INC, ZILLOW GROUP INC, WAYFAIR INC, DEXCOM INC | 13F-HR | 16 Nov 2020, 13:57 |
| Q2 2020 | 400 | $1,194,293,000 | +$602,580,908 | -$552,378,196 | +$50,202,712 | CCIPRA, MONGODB INC, WAYFAIR INC, AAL, CAESARS ENTMT CORP | 13F-HR | 14 Aug 2020, 14:38 |
| Q1 2020 | 405 | $968,801,000 | +$436,601,968 | -$521,446,925 | -$84,844,957 | BDXA, CAESARS ENTMT CORP, AAL, MONGODB INC, SOLARCITY CORP | 13F-HR | 15 May 2020, 15:09 |
| Q4 2019 | 443 | $1,390,777,000 | +$446,229,121 | -$516,972,926 | -$70,743,805 | ZIONW, CAESARS ENTMT CORP, AAL, MEDICINES CO, DEXCOM INC | 13F-HR | 14 Feb 2020, 14:10 |
| Q3 2019 | 453 | $1,342,499,000 | +$405,826,677 | -$482,435,488 | -$76,608,811 | CAESARS ENTMT CORP, AAL, DTV, ZIONW, COUPA SOFTWARE INC | 13F-HR | 14 Nov 2019, 15:39 |
| Q2 2019 | 678 | $1,542,516,000 | +$561,498,399 | -$544,011,088 | +$17,487,311 | AABA, AAL, CAESARS ENTMT CORP, ARRAY BIOPHARMA INC, ZIONW | 13F-HR | 14 Aug 2019, 14:58 |
| Q1 2019 | 400 | $1,459,656,000 | +$520,314,307 | -$397,050,886 | +$123,263,421 | AAL, AABA, COTY, ZIONW, INTEGRATED DEVICE TECHNOLOGY | 13F-HR | 15 May 2019, 14:58 |
| Q4 2018 | 402 | $1,214,035,000 | +$374,457,703 | -$748,954,286 | -$374,496,583 | AAL, AABA, MOLINA HEALTHCARE INC, ZIONW, INTEGRATED DEVICE TECHNOLOGY | 13F-HR | 14 Feb 2019, 13:47 |
| Q3 2018 | 408 | $1,907,350,000 | +$712,395,815 | -$598,377,164 | +$114,018,651 | FTV, AAL, SQUARE INC, MOLINA HEALTHCARE INC, ZIONW | 13F-HR | 14 Nov 2018, 15:01 |
| Q2 2018 | 412 | $1,751,237,000 | +$484,003,404 | -$540,770,013 | -$56,766,609 | AABA, AAL, ZIONW, STI, MOLINA HEALTHCARE INC | 13F-HR | 14 Aug 2018, 15:15 |
| Q1 2018 | 413 | $1,813,250,000 | +$553,140,145 | -$422,273,961 | +$130,866,184 | AABA, AAL, ZIONW, STI, MICRON TECHNOLOGY INC | 13F-HR | 15 May 2018, 14:33 |
| Q4 2017 | 440 | $1,654,589,000 | +$486,471,091 | -$491,583,190 | -$5,112,099 | AAL, AABA, ZIONW, STIWSB, MICRON TECHNOLOGY INC | 13F-HR | 14 Feb 2018, 11:25 |
| Q3 2017 | 455 | $1,627,147,000 | +$383,865,079 | -$387,873,484 | -$4,008,405 | AAL, AABA, TESARO INC, ZIONW, STIWSB | 13F-HR | 14 Nov 2017, 12:26 |
| Q2 2017 | 459 | $1,598,179,000 | +$494,408,980 | -$408,841,009 | +$85,567,971 | AAL, TESARO INC, AABA, ZIONW, ANTHEM INC | 13F-HR | 14 Aug 2017, 15:38 |
| Q1 2017 | 471 | $1,457,781,000 | +$438,913,994 | -$464,989,084 | -$26,075,090 | AAL, TESARO INC, YHOO, ZIONW, STIWSB | 13F-HR | 15 May 2017, 14:29 |
| Q4 2016 | 497 | $1,445,871,000 | +$474,013,233 | -$678,186,276 | -$204,173,043 | AAL, TESARO INC, ZIONW, YHOO, STIWSB | 13F-HR | 14 Feb 2017, 15:29 |
| Q3 2016 | 509 | $1,512,911,000 | +$673,835,785 | -$482,950,785 | +$190,885,000 | PG, AAL, TESARO INC, YHOO, NUVASIVE INC | 13F-HR | 14 Nov 2016, 13:56 |
| Q2 2016 | 485 | $1,230,179,000 | +$424,705,208 | -$589,023,050 | -$164,317,842 | AAL, CCIPRA, NVIDIA CORP, EXELIXIS INC, TESARO INC | 13F-HR | 15 Aug 2016, 15:08 |
| Q1 2016 | 463 | $1,379,548,000 | +$528,226,929 | -$423,343,040 | +$104,883,889 | AAL, JARDEN CORP, YHOO, HIGWS, JARDEN CORP | 13F-HR | 16 May 2016, 14:31 |
| Q4 2015 | 476 | $1,330,030,000 | +$433,291,024 | -$428,888,817 | +$4,402,207 | AAL, TYFDL, SANDISK CORP, JARDEN CORP, HIGWS | 13F-HR | 16 Feb 2016, 13:51 |
| Q3 2015 | 547 | $1,287,571,000 | +$443,148,969 | -$636,197,282 | -$193,048,313 | AAL, DOW, GE, MEDICINES CO, HIGWS | 13F-HR | 16 Nov 2015, 13:39 |
| Q2 2015 | 552 | $1,627,130,000 | +$594,479,212 | -$512,746,295 | +$81,732,917 | AAL, OMNICARE INC, DHR, OMNICARE INC, GE | 13F-HR | 14 Aug 2015, 13:57 |
| Q1 2015 | 525 | $1,558,354,000 | +$529,302,845 | -$446,978,080 | +$82,324,765 | AAL, NEEPRO, HIGWS, MEDIVATION INC, OCRPRB | 13F-HR | 15 May 2015, 12:14 |
| Q4 2014 | 577 | $1,467,467,317 | +$426,585,634 | -$498,760,917 | -$72,175,283 | AAL, HIGWS, CUBIST PHARMACEUTICALS INC, OCRPRB, MICRON TECHNOLOGY INC | 13F-HR | 17 Feb 2015, 14:19 |
| Q3 2014 | 561 | $1,480,174,000 | +$454,342,656 | -$466,498,686 | -$12,156,030 | AAL, MICRON TECHNOLOGY INC, AUXILIUM PHARMACEUTICALS INC, MLU, EQUINIX INC | 13F-HR | 14 Nov 2014, 12:24 |
| Q2 2014 | 529 | $1,592,651,000 | +$653,380,588 | -$535,741,105 | +$117,639,483 | AAL, CBS, WY, OCRPRB, CEMEX SAB DE CV | 13F-HR | 14 Aug 2014, 12:24 |
| Q1 2014 | 484 | $1,425,731,000 | +$597,155,484 | -$505,061,137 | +$92,094,347 | AAL, GM, GENCORP INC, GT ADVANCED TECHNOLOGIES INC, OCRPRB | 13F-HR | 15 May 2014, 10:53 |
| Q4 2013 | 490 | $1,328,449,000 | $0 | $0 | $0 | GMWSB, GMWSA, VIROPHARMA INC, GENCORP INC, OCRPRB | 13F-HR | 14 Feb 2014, 10:00 |