258 tracked 13F filers disclose a position in CALX as of the latest SEC 13F filings, a combined $2.7B 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 | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $546.4M | 11.2M | ▼−2.7% Reduced · −310K sh | Q1 2026 | |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | $271.1M | 5.5M | →First observed position No prior filed position | Q1 2026 | |
| 3 | ALLIANCEBERNSTEIN L.P. | $172.1M | 3.3M | ▲+122% Added · +1.8M sh | Q1 2026 | |
| 4 | STATE STREET CORP | $108.8M | 2.9M | ▲+12% Added · +313K sh | Q2 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $131.6M | 2.7M | →First observed position No prior filed position | Q1 2026 | |
| 6 | MILLENNIUM MANAGEMENT LLC | $93.3M | 1.9M | ▲+32% Added · +462K sh | Q1 2026 | |
| 7 | CONGRESS ASSET MANAGEMENT CO | $80.6M | 1.6M | ▲+14% Added · +197K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $55.3M | 1.5M | ▲+3.2% Added · +46K sh | Q2 2026 | |
| 9 | WESTFIELD CAPITAL MANAGEMENT CO LP | $49.4M | 1.3M | ▼−14% Reduced · −222K sh | Q2 2026 | |
| 10 | DIMENSIONAL FUND ADVISORS LP | $59.7M | 1.2M | ▲+28% Added · +270K sh | Q1 2026 | |
| 11 | PARADIGM CAPITAL MANAGEMENT INC/NY | $37.2M | 997K | ▲+30% Added · +229K sh | Q2 2026 | |
| 12 | LOOMIS SAYLES & CO L P | $41.2M | 840K | ▲+6.4% Added · +50K sh | Q1 2026 | |
| 13 | BANK OF AMERICA CORP /DE/ | $36.7M | 750K | ▲+63% Added · +291K sh | Q1 2026 | |
| 14 | MORGAN STANLEY | $34.9M | 712K | ▲+14% Added · +89K sh | Q1 2026 | |
| 15 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $34.1M | 697K | ▼−8.9% Reduced · −69K sh | Q1 2026 | |
| 16 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $33.4M | 682K | ▲+1.3% Added · +9K sh | Q1 2026 | |
| 17 | UBS Group AG | $31.6M | 645K | ▲+80% Added · +286K sh | Q1 2026 | |
| 18 | NORTHERN TRUST CORP | $29.9M | 610K | ▲+2.4% Added · +14K sh | Q1 2026 | |
| 19 | GILDER GAGNON HOWE & CO LLC | $21.7M | 580K | ▼−26% Reduced · −199K sh | Q2 2026 | |
| 20 | Harvey Partners, LLC | $28.0M | 573K | ▲+7.3% Added · +39K sh | Q1 2026 | |
| 21 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | $27.0M | 551K | ▼−57% Reduced · −726K sh | Q1 2026 | |
| 22 | RENAISSANCE TECHNOLOGIES LLC | $26.6M | 543K | ▲+17% Added · +80K sh | Q1 2026 | |
| 23 | Artisan Partners Limited Partnership | $26.0M | 530K | ▼−10% Reduced · −60K sh | Q1 2026 | |
| 24 | Point72 Asset Management, L.P. | $25.2M | 514K | ▲New +514K sh | Q1 2026 | |
| 25 | Squarepoint Ops LLC | $22.5M | 459K | ▲+259% Added · +331K sh | Q1 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, 5 funds opened a new position in CALX and 41 added to an existing one, while 16 reduced and 0 exited entirely — 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 | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 137 funds | $224.9B |
| NVIDIA CORPNVDA | 135 funds | $335.8B |
| AMAZON.COM INCAMZN | 135 funds | $168.6B |
| META PLATFORMS INC-CLASS AMETA | 135 funds | $98.2B |
| ALPHABET INC-CL AGOOGL | 131 funds | $141.3B |
| MICRON TECHNOLOGY INCMU | 131 funds | $33.6B |
| BROADCOM INCAVGO | 130 funds | $133.8B |
| JPMORGAN CHASE & COJPM | 130 funds | $48.1B |
| APPLE INCAAPL | 129 funds | $243.3B |
| ELI LILLY & COLLY | 128 funds | $63.9B |
| LAM RESEARCH CORPLRCX | 128 funds | $31.8B |
| BERKSHIRE HATHAWAY INC-CL BBRK/B | 128 funds | $30.3B |
Ranked by how many of CALX's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Feb 8, 2013 | LISTWIN DONALD J | Director | Buy (P) | 25K | $200K |
| Nov 15, 2012 | LISTWIN DONALD J | Director | Buy (P) | 25K | $142K |
| Sep 10, 2012 | Ashby Michael | Executive VP and CFO, Director | Buy (P) | 50K | $279K |
| Sep 5, 2012 | LISTWIN DONALD J | Director | Buy (P) | 31K | $161K |
| Nov 22, 2011 | Lockhart Andy Glen | SVP, International Field Ops | Buy (P) | 5K | $40K |
| Nov 21, 2011 | Lockhart Andy Glen | SVP, International Field Ops | Buy (P) | 5K | $40K |
| Sep 1, 2011 | Ashby Michael | Executive VP and CFO, Director | Sell (S) | 5K | $73K |
| Aug 1, 2011 | Ashby Michael | Executive VP and CFO, Director | Sell (S) | 10K | $181K |
| Jul 1, 2011 | Ashby Michael | Executive VP and CFO, Director | Sell (S) | 20K | $420K |
| Jun 1, 2011 | Ashby Michael | Executive VP and CFO, Director | Sell (S) | 20K | $420K |
| May 6, 2011 | Weingarth Roger | Executive VP and COO | Sell (S) | 5K | $108K |
| May 4, 2011 | LISTWIN DONALD J | Director | Buy (P) | 25K | $519K |
Connected entities for CALX
This stock 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/CALX/capital-change-brief"
Use Arkolith's capital_change_brief for CALX. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for CALX. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.