Among active 13F managers last quarter, 1 added and 1 reduced; the largest holder to move was Citadel Advisors LLC (added).
5 tracked 13F filers disclose a position in CLSX as of the latest SEC 13F filings, a combined $1.5M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Citadel Advisors LLC | 60K | $1.2M | ▲Added Added · +60K sh | Q2 2026 | |
| 2 | Summit Financial, LLC | 11K | $231K | ▼−3.8% Reduced · −450 sh | Q2 2026 | |
| 3 | Optiver Holding B.V. | 9K | $78K | ▲+137% Added · +5K sh | Q1 2026 | |
| 4 | Simplex Trading, LLC | 1K | $9K | ▲New +1K sh | Q1 2026 | |
| 5 | Group One Trading LLC | 52 | $1K | ▲New +52 sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 1 fund added to an existing position in CLSX, while 1 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Ishares Core S&P 500 ETFIVV | 2 funds | $13.5B |
| Amazon.com IncAMZN | 2 funds | $2.7B |
| Nvidia CorpNVDA | 2 funds | $2.5B |
| Apple IncAAPL | 2 funds | $2.3B |
| Microsoft CorpMSFT | 2 funds | $1.5B |
| Electronic Arts IncEA | 2 funds | $1.2B |
| Warner Bros Discovery IncWBD | 2 funds | $1.2B |
| Eli Lilly & CoLLY | 2 funds | $1.2B |
| Broadcom IncAVGO | 2 funds | $1.2B |
| BlackRock IncBLK | 2 funds | $1.1B |
| Advanced Micro DevicesAMD | 2 funds | $967.8M |
| Alphabet Inc-CL CGOOG | 2 funds | $965.5M |
Ranked by how many of CLSX's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in CLSX.
| Class | 13F holders | Value held |
|---|---|---|
| TSLQTRADR 2X SHORT | 16 funds | $8.7M |
| WDCXTRADR 2X WDC ETF | 12 funds | $5.4M |
| NEBXTRADR 2X LONG | 11 funds | $21.6M |
| QBTXTRADR 2X LONG QB | 10 funds | $1.9M |
| BEXTRADR 2X LONG BE | 9 funds | $8.8M |
| IREZTRADR 2X SHORT | 9 funds | $5.5M |
| LRCUmc | 6 funds | $1.9M |
| MQQQTRAD 2X LON MONT | 5 funds | $148.4M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
No filings captured for this ticker in the live stream yet.
Connected entities for CLSX
This ETF page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/CLSX/capital-change-brief"
Use Arkolith's capital_change_brief for CLSX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + quarter-over-quarter ownership changes + end-of-day price history + the live filing stream, joined for CLSX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.