Filer Snapshot

CSS LLC/IL SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001103646.

Entity Type

Company

Total Filings

160

Latest Filing

17 Apr 2026

Industry

n/a

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Go to latest filings table Open reporting owner context
Source: SEC Schedule 13D/G

SCHEDULE 13G/A filed on 17 Apr 2026 for CIK 0001103646.

View Source Filing
Business address
1 North Wacker Drive, Suite 3075, Chicago, IL, 60606
Top holdings (ownership)
SWZ and VINE
Top securities (13F)
ECHOSTAR CORP, LUMENTUM HLDGS INC, JAZZ INVESTMENTS I LTD, IONIS PHARMACEUTICALS INC, PEABODY ENGR CORP, LIVE NATION ENTERTAINMENT IN, EQUINOX GOLD CORP, LUMENTUM HLDGS INC, TRANSOCEAN INC, BRIDGEBIO PHARMA INC, BACPRL, GUARDANT HEALTH INC, VOO, RSP, CORZW, IAU, MANNKIND CORP, SNOWFLAKE INC, AKAMAI TECHNOLOGIES INC, and COLLEGIUM PHARMACEUTICAL INC
Top holdings (Schedule 13G)
CHN, SWZ, JEQ, BMTX, MXE, RSF, and LBRDB
State of incorporation
IL
Fiscal year end
31 December

Quick Takeaways

  • CSS LLC/IL is an SEC filer tracked under CIK 0001103646.
  • 160 filings are listed on this profile.
  • Common form coverage includes SCHEDULE 13G/A, 13F-HR, 4 and more.

What Changed

  • Latest filing: SCHEDULE 13G/A filed on 17 Apr 2026.
  • Report period: not specified in filing header.

Why This Matters

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Source Evidence

Source: SEC Schedule 13D/G

SCHEDULE 13G/A filed on 17 Apr 2026 for CIK 0001103646.

View Source Filing

Return Loop

Why revisit this filer page

A newly filed SCHEDULE 13G/A can change the filing history, ownership context, or next research path for CSS LLC/IL.

Latest source-backed update
SCHEDULE 13G/A filed 17 Apr 2026
Why come back
Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: SCHEDULE 13G/A filed 17 Apr 2026.
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Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

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Latest update

What changed recently for CSS LLC/IL

New filing available

Latest 13F period: Q4 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

17 Feb 2026

Page type

Filer profile

Latest period

Q4 2025

Institutional portfolio context was refreshed from a 13F filing filed on 17 Feb 2026.

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Benchmark Context

Benchmark context for this company

CSS LLC/IL has a source-backed company facts view where you can compare the latest reported metrics with its own recent history and with peer rankings for the same metric.

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Why this is notable

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Company intelligence

Research CSS LLC/IL from filings to ownership signals

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Active modules

3/5

Available company intelligence paths on this page.

Filings

160

SEC submissions provide the evidence trail.

Ownership context

2/3

Insider, large-stake, and institutional ownership lanes.

Return loop

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SEC filings

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Company facts

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Financial context

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Forms 3/4/5

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Insider activity

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Schedule 13D/G

Available

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Form 13F

Available

Institutional holders

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Filer Overview

CSS LLC/IL has filed 160 SEC EDGAR filings since 20 Jan 2000. Common forms include SCHEDULE 13G/A, 13F-HR, 4, 3 and more.

Reporting owner transactions Latest 13F filings

Latest Filings

Recent SEC filings for CSS LLC/IL with direct links to document and filing folders.

Form type Document Filing Description Filing date Reporting date File number(s)
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 17 Apr 2026
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 Feb 2026 31 Dec 2025 028-15940
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 13 Feb 2026
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 31 Dec 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 31 Dec 2025 29 Dec 2025 811-05128
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Dec 2025 22 Dec 2025 811-05128
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 19 Dec 2025
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 Dec 2025 15 Dec 2025 811-05128
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 16 Dec 2025
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 16 Dec 2025 12 Dec 2025 811-05128
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 03 Dec 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 26 Nov 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 13 Nov 2025 30 Sep 2025 028-15940
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 06 Nov 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 30 Oct 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 21 Oct 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 10 Oct 2025
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 28 Aug 2025
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 21 Aug 2025
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 19 Aug 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2025 30 Jun 2025 028-15940
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 14 Aug 2025
N-PX Open N-PX document View SEC filing for N-PX 04 Aug 2025 30 Jun 2025 028-15940
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 22 Jul 2025
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 03 Jul 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2025 31 Mar 2025 028-15940
SCHEDULE 13G/A Open SCHEDULE 13G/A document View SEC filing for SCHEDULE 13G/A 08 Apr 2025
N-PX Open N-PX document View SEC filing for N-PX 27 Mar 2025 30 Jun 2024 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 18 Feb 2025 31 Dec 2024 028-15940
SCHEDULE 13G Open SCHEDULE 13G document View SEC filing for SCHEDULE 13G 02 Jan 2025
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2024 30 Sep 2024 028-15940
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 23 Oct 2024
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2024 30 Jun 2024 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2024 31 Mar 2024 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2024 31 Dec 2023 028-15940
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 09 Feb 2024
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 09 Feb 2024
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 29 Dec 2023
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2023 30 Sep 2023 028-15940
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 18 Sep 2023
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 18 Sep 2023 14 Sep 2023 001-41147
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 Sep 2023 06 Sep 2023 001-41147
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 01 Sep 2023 29 Aug 2023 001-41147
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2023 30 Jun 2023 028-15940
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 Jul 2023 12 Jul 2023 001-41147
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 05 Jul 2023 03 Jul 2023 001-41147
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2023 31 Mar 2023 028-15940
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 May 2023 08 May 2023 001-41147
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 08 May 2023 04 May 2023 001-41147
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Apr 2023 18 Apr 2023 001-41147
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 29 Mar 2023 16 Mar 2023 001-41147
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 28 Mar 2023
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2023 31 Dec 2022 028-15940
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 03 Feb 2023
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 31 Jan 2023
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2022 30 Sep 2022 028-15940
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 31 Oct 2022
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 31 Oct 2022
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 09 Sep 2022
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Aug 2022 30 Jun 2022 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2022 31 Mar 2022 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2022 31 Dec 2021 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Nov 2021 30 Sep 2021 028-15940
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 12 Nov 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Aug 2021 30 Jun 2021 028-15940
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 10 Aug 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 10 Aug 2021 06 Aug 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Aug 2021 30 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 30 Jul 2021 29 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Jul 2021 28 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Jul 2021 26 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Jul 2021 23 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 23 Jul 2021 21 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Jul 2021 20 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Jul 2021 19 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Jul 2021 16 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Jul 2021 15 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 15 Jul 2021 13 Jul 2021 811-22780
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 Jul 2021 09 Jul 2021 811-22780
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 12 Jul 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 12 Jul 2021 08 Jul 2021 811-22780
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 12 Jul 2021 08 Jul 2021 811-22780
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 28 Jun 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Jun 2021 25 Jun 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Jun 2021 21 Jun 2021 811-22958
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 28 May 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 25 May 2021 24 May 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 May 2021 19 May 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 17 May 2021 14 May 2021 811-22958
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 May 2021 31 Mar 2021 028-15940
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 14 May 2021 13 May 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 May 2021 12 May 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 11 May 2021 10 May 2021 811-22958
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 29 Apr 2021
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 29 Apr 2021 28 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 28 Apr 2021 27 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 27 Apr 2021 26 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 26 Apr 2021 23 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 22 Apr 2021 21 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Apr 2021 20 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 20 Apr 2021 19 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 19 Apr 2021 16 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 16 Apr 2021 15 Apr 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 Apr 2021 12 Feb 2021 811-22958
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 13 Apr 2021 11 Feb 2021 811-22958
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 13 Apr 2021 12 Feb 2021 811-22958
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 26 Mar 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 18 Mar 2021
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS LLC/IL 05 Mar 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2021 31 Dec 2020 028-15940
SC 13G Open SC 13G document View SEC filing for SC 13G CSS LLC/IL 16 Feb 2021
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Nov 2020 30 Sep 2020 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2020 30 Jun 2020 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2020 31 Mar 2020 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2020 31 Dec 2019 028-15940
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS, LLC/IL 14 Feb 2020
SC 13G/A Open SC 13G/A document View SEC filing for SC 13G/A CSS, LLC/IL 14 Feb 2020
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2019 30 Sep 2019 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2019 30 Jun 2019 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2019 31 Mar 2019 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2019 31 Dec 2018 028-15940
SC 13G Open SC 13G document View SEC filing for SC 13G CSS, LLC/IL 14 Feb 2019
SC 13G Open SC 13G document View SEC filing for SC 13G CSS, LLC/IL 14 Feb 2019
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2018 30 Sep 2018 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2018 30 Jun 2018 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2018 31 Mar 2018 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2018 31 Dec 2017 028-15940
SC 13G Open SC 13G document View SEC filing for SC 13G 14 Feb 2018
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2017 30 Sep 2017 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2017 30 Jun 2017 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2017 31 Mar 2017 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2017 31 Dec 2016 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2016 30 Sep 2016 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 Aug 2016 30 Jun 2016 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 May 2016 31 Mar 2016 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Feb 2016 31 Dec 2015 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 16 Nov 2015 30 Sep 2015 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2015 30 Jun 2015 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2015 31 Mar 2015 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 17 Feb 2015 31 Dec 2014 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Nov 2014 30 Sep 2014 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Aug 2014 30 Jun 2014 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 15 May 2014 31 Mar 2014 028-15940
13F-HR Open 13F-HR document View SEC filing for 13F-HR 14 Feb 2014 31 Dec 2013 028-15940
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 02 Jan 2013 28 Dec 2012 000-21615
4 Open 4 document View SEC filing for 4 PRIMARY DOCUMENT 21 Nov 2012 10 Apr 2012 000-21615
3 Open 3 document View SEC filing for 3 PRIMARY DOCUMENT 06 Nov 2012 05 Apr 2012 000-21615

About this filer

CSS LLC/IL files with the SEC under CIK 0001103646. This page aggregates EDGAR filings and related ownership activity.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.
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