13F Filings History of CSS LLC/IL
- Latest 13F filing
- Q1 2026 - 15 May 2026
- Latest reported 13F value
- $1,781,001,573
- Form 13F summary
-
- CSS LLC/IL Form 13F history summarizes parsed U.S.-listed equity disclosures for this manager.
- Form 13F is generally due within 45 days after each calendar quarter ends.
- CSS LLC/IL reported 739 equity holdings with a total reported market value of $1,781,001,573 for Q1 2026. Top reported holdings included LUMENTUM HLDGS INC, ECHOSTAR CORP, JAZZ INVESTMENTS I LTD, LIVE NATION ENTERTAINMENT IN, and TRANSOCEAN INC.
- Largest 13F holdings
-
LUMENTUM HLDGS INC ECHOSTAR CORP JAZZ INVESTMENTS I LTD LIVE NATION ENTERTAINMENT IN TRANSOCEAN INC PEABODY ENGR CORP NEEPRV CENTERPOINT ENERGY INC ALNYLAM PHARMACEUTICALS INC RSP VOO EQUINOX GOLD CORP
+8 more
CORZW ALBPRA AKAMAI TECHNOLOGIES INC STRIDE INC IAU BRIDGEBIO PHARMA INC APOPRA CLOUDFLARE INC - Manager signature
- Mitchel Bialek - CCO
- Manager location
- Chicago, IL
13F snapshot
Latest parsed holdings, value, and filing-period context.
2 signals
Manager
Names, identifiers, and filing context for this profile.
2 identity fields
Follow Filing Activity
Follow CSS LLC/IL and return when a new 13F portfolio filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean. If you create an account from here, we will bring you back after verification.
Holdings Value
Form 13F evidence
Quarterly portfolio filings
SEC-reported 13F quarters for this filer, ordered by the latest accepted filing.
Latest quarter
Q1 2026
Latest value
$1,781,001,573
Quarter delta
+$12,760,278
Accepted
15 May 2026, 13:53
Rows shown
1-25 of 50
| Quarter | Holdings | SEC-reported value | Bought | Sold | Net | Top Holdings | Form Type | Accepted by SEC |
|---|---|---|---|---|---|---|---|---|
| Q1 2026 | 739 | $1,781,001,573 | +$497,549,778 | -$630,348,007 | -$132,798,229 | LUMENTUM HLDGS INC, ECHOSTAR CORP, JAZZ INVESTMENTS I LTD, LIVE NATION ENTERTAINMENT IN, TRANSOCEAN INC | 13F-HR | 15 May 2026, 13:53 |
| 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 |