CSS LLC/IL

CIK 0001103646 · CHICAGO, IL · Quarter end: 2026-06-30 · Filed on: 2026-08-14 · Open the SEC source

CSS LLC/IL reported 1,001 positions worth $2.57B as of June 30, 2026 (13F filed August 14, 2026). Largest holding: LITE 0.5 06-15-28 (9.6%).

Portfolio Value (AUM)Total value of the fund's US stock portfolio reported to the SEC.
$2.57B
2026 Q2
Positions
1,001
Top-10 ConcentrationHow much of the portfolio sits in the 10 largest holdings. High = concentrated bets.
35.0%
Est. Net Flow (Q)
2026 Q2
10 / 1001 positions shown
#SymbolCompanyTypeValue% Port.Shares1YYTD
1LITE 0.5 06-15-28LUMENTUM HLDGS INCSH$245.6M9.56%37,554,000
2HPE 7.625 09-01-27HEWLETT PACKARD ENTERPRISE CSH$149.3M5.81%1,276,322
3ECHO 3.875 11-30-30ECHOSTAR CORPSH$137.4M5.35%43,925,753
4APO 6.75 07-31-26APOLLO GLOBAL MGMT INCSH$82.8M3.22%1,361,499
5BAC 7.25 PERP LBANK OF AMER CORPSH$63.3M2.46%50,372
6WOLF 2.5 06-15-31WOLFSPEED INCSH$54.2M2.11%13,773,940
7SMCI 7 06-01-29SUPER MICRO COMPUTER INCSH$45.3M1.76%878,227
8CORZWCORE SCIENTIFIC INC NEWSH$44.2M1.72%2,351,492
9MCHP 7.5 03-15-28MICROCHIP TECHNOLOGY INC.SH$43.0M1.67%558,552
10NET 0 08-15-26CLOUDFLARE INCSH$33.5M1.31%26,112,000

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Read the 2026-Q2 quarterly report · 13F Filing Calendar

Frequently Asked Questions

What stocks does CSS LLC/IL hold as of Q2 2026?

CSS LLC/IL reported 1001 positions worth $2.57B in its Q2 2026 13F filing. Largest positions: LITE 0.5 06-15-28 (9.6%), HPE 7.625 09-01-27 (5.8%), ECHO 3.875 11-30-30 (5.4%), APO 6.75 07-31-26 (3.2%) and BAC 7.25 PERP L (2.5%).

What did CSS LLC/IL buy in Q2 2026?

No previous quarter is available yet; the comparison appears with the next filing.

What did CSS LLC/IL sell in Q2 2026?

No previous quarter is available yet.

13F data shows quarter-end positions, is delayed by up to 45 days and covers only long positions in US-listed securities; short positions, most derivatives and non-US assets are not reported.