13F Insight
DOSSIER · 13F-HR · Q1 2026

CSS LLC/IL

$2.1B in tracked AUM across 961 positions as of Q1 2026.

CL
CIK 0001103646 · last filed Mar 31, 2026
Total AUM
$2.1B
as of Q1 2026
Holdings
961
—
positions
Whale Score
56
56
tracked
Activity
—
no data
changes this Q
AI Analysis · Q1 2026

CSS LLC/IL filed its latest 13F-HR for Q1 2026. See the latest holdings and position changes below.

Quarter at a glance — Q1 2026

Position-change comparison pending.

No quarter-over-quarter changes available.

Top 10 holdings

By portfolio weight as of Q1 2026.

#HoldingValueSharesWeight
01
LITE 0.5 06/15/28
LUMENTUM HLDGS INC
$217M40.5M10.4%02
SATS 3.875 11/30/30
ECHOSTAR CORP
$147M40.9M7.0%03
JAZZ 2 06/15/26
JAZZ INVESTMENTS I LTD
$64M52.6M3.1%04
LYV 3.125 01/15/29
LIVE NATION ENTERTAINMENT IN
$50M32.8M2.4%05
RIG 4.625 09/30/29 *
TRANSOCEAN INC
$50M24.4M2.4%06
BTU 3.25 03/01/28
PEABODY ENGR CORP
$38M20.7M1.8%07
GME
GAMESTOP CORP
$28M1.2M1.3%08
NEE 7.375 02/15/29
NEXTERA ENERGY INC
$27M541K1.3%09
CNP 4.25 08/15/26
CENTERPOINT ENERGY INC
$25M21.0M1.2%10
PEN
PENUMBRA INC
$24M74K1.2%

Filing history

2026Q1Mar 31
$2.1B▼ 7.2%
961 positionsView →2025Q4Dec 31
$2.2B▲ 0.9%
999 positionsView →2025Q3Sep 30
$2.2B▲ 4.0%
985 positionsView →2025Q2Jun 30
$2.1B▲ 17.7%
953 positionsLocked2025Q1Mar 31
$1.8B▼ 19.6%
909 positionsLocked2024Q4Dec 31
$2.3B▲ 3.6%
955 positionsLocked2024Q3Sep 30
$2.2B▲ 11.8%
820 positionsLocked2024Q2Jun 30
$2.0B▲ 12.9%
875 positionsLocked2024Q1Mar 31
$1.7B▲ 0.1%
806 positionsLocked2023Q4Dec 31
$1.7B▲ 13.5%
792 positionsLocked2023Q3Sep 30
$1.5B▼ 5.7%
808 positionsLocked2023Q2Jun 30
$1.6B▲ 6.7%
891 positionsLocked
Showing 12 of 49