CALXNYSECommunications Services, NECFiscal year ends December 31
CALIX, INC
Financials through Q2 FY2026, quarter ended Jun 27, 2026Last filing: 10-Q on Jul 21, 2026
$35.64−0.86 (-2.36%)
Close on Oct 19, 2026
- Market cap
- $2.33B
- P/E (TTM)
- 48.2
- Dividend yield
- 0.00%
Ownership
Institutional holdings as of Jun 30, 2026, from 13F filings
Held by institutions
95.4%
60M of 63M shares
Institutional holders
287
39 new, 58 sold out
Net institutional buying
0M
In Q2 2026
Insider trades, 12 months
0 buys · 17 sales
Net sold $59.38M
Shares held by institutions
Holders of more than 5%
Latest Schedule 13D (active) or 13G (passive) filed by each holder
| Holder | Shares | % of class | Filing | As of |
|---|---|---|---|---|
| Carl Russo | 7,269,452 | 11.00% | 13G (passive) amendment | Dec 31, 2023 |
| Vanguard Portfolio Management | 5,586,179 | 8.64% | 13G (passive) | Mar 31, 2026 |
| AllianceBernstein L.P. | 3,251,128 | 5.00% | 13G (passive) | Mar 31, 2026 |
| BlackRock, Inc. | 10,323,597 | 16.20% | 13G (passive) amendment | Jun 30, 2026 |
Top institutional holders
13F holdings as of Jun 30, 2026
| Holder | Shares | % of CALX | Value | Change | % of portfolio |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11,775,490 | 18.70% | $439.46M | +622,087 | 0.01% |
| Vanguard Portfolio Management LLC | 5,588,048 | 8.87% | $208.55M | +54,294 | 0.01% |
| Alliancebernstein L.P. | 3,248,412 | 5.16% | $159.14M | −2,716 | 0.05% |
| State Street Corp | 2,915,560 | 4.63% | $108.79M | +313,227 | 0.00% |
| Vanguard Capital Management LLC | 2,587,424 | 4.11% | $96.56M | −99,101 | 0.00% |
| Geode Capital Management, LLC | 1,481,595 | 2.35% | $55.30M | +45,889 | 0.00% |
| Westfield Capital Management Co LP | 1,324,534 | 2.10% | $49.43M | −221,567 | 0.16% |
| Dimensional Fund Advisors LP | 1,309,436 | 2.08% | $48.86M | +90,941 | 0.01% |
| Acadian Asset Management LLC | 1,241,622 | 1.97% | $46.32K | +441,292 | 0.05% |
| Citadel Advisors LLC | 1,208,764 | 1.92% | $45.11M | +780,566 | 0.01% |
| Paradigm Capital Management Inc/Ny | 997,134 | 1.58% | $37.21M | +228,934 | 1.01% |
| Arrowstreet Capital, Limited Partnership | 875,837 | 1.39% | $32.69M | +324,687 | 0.01% |
| UBS Group AG | 857,360 | 1.36% | $32.00M | +212,115 | 0.00% |
| Loomis Sayles & Co L P | 784,798 | 1.25% | $29.29M | −55,399 | 0.04% |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 753,302 | 1.20% | $28.11M | +56,447 | 0.03% |
| Jane Street Group, LLC | 718,768 | 1.14% | $26.82M | +366,823 | 0.00% |
| Two Sigma Investments, LP | 703,911 | 1.12% | $26.27M | +542,456 | 0.02% |
| Millennium Management LLC | 698,620 | 1.11% | $26.07M | −1,205,352 | 0.01% |
| Charles Schwab Investment Management Inc | 696,967 | 1.11% | $26.01M | +15,013 | 0.00% |
| Nomura Asset Management International Inc. | 659,563 | 1.05% | $24.62M | +102,568 | 0.04% |
Institutional buying and selling by quarter
Positions opened, added to, reduced and closed by 13F filers
| Quarter | Holders | Shares held | % of shares | New / added | Reduced / closed | Shares bought | Shares sold |
|---|---|---|---|---|---|---|---|
| Q2 2026 | 287 | 60M | 95.4% | 39 / 106 | 112 / 58 | 9M | 9M |
| Q1 2026 | 310 | 60M | 94.8% | 45 / 124 | 98 / 63 | 18M | 10M |
| Q4 2025 | 332 | 60M | 95.1% | 59 / 128 | 100 / 34 | 8M | 5M |
| Q3 2025 | 314 | 57M | 90.2% | 53 / 112 | 100 / 30 | 7M | 6M |
| Q2 2025 | 295 | 56M | 88.9% | 66 / 100 | 100 / 30 | 8M | 9M |
| Q1 2025 | 260 | 57M | 89.8% | 37 / 93 | 96 / 28 | 5M | 5M |
| Q4 2024 | 253 | 57M | 91.1% | 46 / 92 | 82 / 33 | 7M | 7M |
| Q3 2024 | 241 | 57M | 90.9% | 27 / 104 | 77 / 38 | 16M | 5M |
| Q2 2024 | 254 | 58M | 91.6% | 43 / 102 | 90 / 45 | 6M | 7M |
| Q1 2024 | 260 | 59M | 94.0% | 45 / 100 | 89 / 44 | 11M | 10M |
| Q4 2023 | 263 | 58M | 92.2% | 30 / 105 | 99 / 41 | 11M | 8M |
| Q3 2023 | 276 | 55M | 86.8% | 45 / 114 | 96 / 33 | 7M | 7M |
Top mutual fund and ETF holders
Latest monthly portfolio reports (Form N-PORT)
| Fund | Shares | % of CALX | Value | % of fund | As of |
|---|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 3,497,584 | 5.55% | $130.53M | 0.12% | Jun 30, 2026 |
| Vanguard Total Stock Market Index Fund | 1,816,146 | 2.88% | $67.78M | 0.00% | Jun 30, 2026 |
| Vanguard Information Technology Index Fund | 1,548,202 | 2.46% | $61.54M | 0.04% | May 31, 2026 |
| iShares Russell 2000 ETF | 1,537,083 | 2.44% | $57.36M | 0.07% | Jun 30, 2026 |
| Vanguard Small-Cap Index Fund | 1,315,270 | 2.09% | $49.09M | 0.03% | Jun 30, 2026 |
| iShares Cybersecurity and Tech ETF | 855,655 | 1.36% | $30.72M | 3.02% | Jul 31, 2026 |
| Vanguard Small-Cap Growth Index Fund | 755,133 | 1.20% | $28.18M | 0.06% | Jun 30, 2026 |
| Global X U.S. Infrastructure Development ETF | 668,154 | 1.06% | $26.56M | 0.20% | May 31, 2026 |
| Vanguard Extended Market Index Fund | 665,925 | 1.06% | $24.85M | 0.03% | Jun 30, 2026 |
| Harbor Small Cap Growth Fund | 659,769 | 1.05% | $23.69M | 0.89% | Jul 31, 2026 |
| Fidelity Small Cap Index Fund | 647,297 | 1.03% | $23.24M | 0.07% | Jul 31, 2026 |
| Vanguard Strategic Equity Fund | 560,626 | 0.89% | $20.92M | 0.17% | Jun 30, 2026 |
| State Street(R) SPDR(R) S&P(R) Telecom ETF | 557,878 | 0.89% | $20.82M | 2.92% | Jun 30, 2026 |
| AB Discovery Value Fund | 556,686 | 0.88% | $20.78M | 0.81% | Jun 30, 2026 |
| iShares Russell 2000 Growth ETF | 547,030 | 0.87% | $20.42M | 0.13% | Jun 30, 2026 |
Officers, directors and major owners
People who filed Forms 3, 4 or 5 in the last two years
| Name | Role | Shares owned | % of shares | Latest filing |
|---|---|---|---|---|
| Michael Weening | President & CEO, Director | 16,556 | 0.03% | Feb 17, 2026 |
| John Durocher | COO | 2,367 | 0.00% | Feb 17, 2026 |
| Cory Sindelar | Chief Financial Officer | 103,994 | 0.17% | Feb 17, 2026 |
| Shane Todd Marshall Eleniak | Chief Product Officer | 0 | – | Feb 17, 2026 |
| John Matthew Collins | Chief Commercial Ops Officer | 30,000 | 0.05% | Feb 4, 2025 |
| Carl Russo | Director, 10% owner | 5,527,225 | 8.78% | Sep 29, 2026 |
| Rajatish Mukherjee | Director | 9,656 | 0.02% | May 18, 2026 |
| Kathleen M. Crusco | Director | 64,361 | 0.10% | May 18, 2026 |
| Wade Oosterman | Director | 12,156 | 0.02% | May 18, 2026 |
| Michael J. Berry | Director | 9,656 | 0.02% | May 18, 2026 |
| Kevin Robert Peters | Director | 135,684 | 0.22% | May 18, 2026 |
| Christopher J. Bowick | Director | 71,583 | 0.11% | May 18, 2026 |
| Kira Makagon | Director | 43,931 | 0.07% | May 18, 2026 |
Insider trades
Common stock transactions reported on Form 4, newest first
| Insider | Date | Transaction | Shares | Price | Value | Shares after |
|---|---|---|---|---|---|---|
| Carl Russo Director, 10% owner | Jul 27, 2026 | Sale(10b5-1 plan) | −75,000 | $36.20 | $2.72M | 1,569,188 |
| Kevin Robert Peters Director | May 14, 2026 | Award | +4,967 | – | – | 9,656 |
| Rajatish Mukherjee Director | May 14, 2026 | Award | +4,967 | – | – | 9,656 |
| Carl Russo Director, 10% owner | May 14, 2026 | Award | +4,967 | – | – | 3,958,037 |
| Kathleen M. Crusco Director | May 14, 2026 | Award | +4,967 | – | – | 64,361 |
| Christopher J. Bowick Director | May 14, 2026 | Award | +4,967 | – | – | 71,583 |
| Kira Makagon Director | May 14, 2026 | Award | +4,967 | – | – | 43,931 |
| Michael J. Berry Director | May 14, 2026 | Award | +4,967 | – | – | 9,656 |
| Wade Oosterman Director | May 14, 2026 | Award | +4,967 | – | – | 12,156 |
| Carl Russo Director, 10% owner | Apr 27, 2026 | Sale(10b5-1 plan) | −4,091 | $43.75 | $178.98K | 1,644,188 |
| Carl Russo Director, 10% owner | Apr 27, 2026 | Sale(10b5-1 plan) | −20,909 | $43.17 | $902.64K | 1,648,279 |
| Carl Russo Director, 10% owner | Apr 8, 2026 | Gift | −40,000 | – | – | 3,953,070 |
| Carl Russo Director, 10% owner | Feb 25, 2026 | Option exercise | +10,000 | $12.63 | $126.30K | 3,993,070 |
| Michael Weening President & CEO, Director | Feb 14, 2026 | Award | +439 | $45.32 | $19.90K | 16,556 |
| John Durocher COO | Feb 14, 2026 | Award | +439 | $45.32 | $19.90K | 2,367 |
| Cory Sindelar Chief Financial Officer | Feb 14, 2026 | Award | +439 | $45.32 | $19.90K | 103,994 |
| Carl Russo Director, 10% owner | Feb 3, 2026 | Sale(10b5-1 plan) | −11,523 | $47.66 | $549.19K | 1,669,188 |
| Carl Russo Director, 10% owner | Feb 3, 2026 | Sale(10b5-1 plan) | −13,477 | $46.93 | $632.48K | 1,680,711 |
| Cory Sindelar Chief Financial Officer | Feb 2, 2026 | Option exercise | +27,000 | $5.05 | $136.35K | 103,555 |
| Carl Russo Director, 10% owner | Jan 7, 2026 | Option exercise | +10,000 | $12.63 | $126.30K | 3,983,070 |
| Carl Russo Director, 10% owner | Nov 24, 2025 | Option exercise | +10,000 | $12.63 | $126.30K | 3,973,070 |
| Carl Russo Director, 10% owner | Nov 17, 2025 | Option exercise | +10,000 | $12.63 | $126.30K | 3,963,070 |
| Shane Todd Marshall Eleniak Chief Product Officer | Nov 10, 2025 | Sale | −24,000 | $64.14 | $1.54M | 0 |
| Shane Todd Marshall Eleniak Chief Product Officer | Nov 10, 2025 | Option exercise | +24,000 | $8.03 | $192.72K | 24,000 |
| Cory Sindelar Chief Financial Officer | Nov 6, 2025 | Sale | −50,000 | $65.30 | $3.27M | 76,555 |
| Cory Sindelar Chief Financial Officer | Nov 6, 2025 | Option exercise | +50,000 | $5.05 | $252.50K | 126,555 |
| Carl Russo Director, 10% owner | Nov 6, 2025 | Option exercise | +200,000 | $12.63 | $2.53M | 3,953,070 |
| Shane Todd Marshall Eleniak Chief Product Officer | Nov 4, 2025 | Sale | −50,000 | $65.34 | $3.27M | 0 |
| Shane Todd Marshall Eleniak Chief Product Officer | Nov 4, 2025 | Option exercise | +50,000 | $7.00 | $350.00K | 50,000 |
| Carl Russo Director, 10% owner | Nov 4, 2025 | Sale(10b5-1 plan) | −12,845 | $66.00 | $847.77K | 1,694,308 |
| Carl Russo Director, 10% owner | Nov 4, 2025 | Sale(10b5-1 plan) | −120 | $66.47 | $7.98K | 1,694,188 |
| Carl Russo Director, 10% owner | Nov 4, 2025 | Sale(10b5-1 plan) | −395,000 | $64.00 | $25.28M | 1,719,188 |
| Carl Russo Director, 10% owner | Nov 4, 2025 | Sale(10b5-1 plan) | −12,035 | $65.11 | $783.60K | 1,707,153 |
| Michael Weening President & CEO, Director | Nov 3, 2025 | Sale(10b5-1 plan) | −74,000 | $67.42 | $4.99M | 16,117 |
| Michael Weening President & CEO, Director | Nov 3, 2025 | Option exercise | +74,000 | $7.84 | $580.16K | 90,117 |
| Cory Sindelar Chief Financial Officer | Oct 31, 2025 | Option exercise | +10,000 | $5.05 | $50.50K | 86,555 |
| Cory Sindelar Chief Financial Officer | Oct 31, 2025 | Sale(10b5-1 plan) | −10,000 | $70.00 | $700.00K | 76,555 |
| Cory Sindelar Chief Financial Officer | Oct 30, 2025 | Sale(10b5-1 plan) | −10,000 | $65.00 | $650.00K | 76,555 |
| Cory Sindelar Chief Financial Officer | Oct 30, 2025 | Option exercise | +10,000 | $5.05 | $50.50K | 86,555 |
| Michael Weening President & CEO, Director | Oct 30, 2025 | Sale(10b5-1 plan) | −150,000 | $64.63 | $9.69M | 66,117 |
| Michael Weening President & CEO, Director | Oct 30, 2025 | Sale(10b5-1 plan) | −50,000 | $67.55 | $3.38M | 16,117 |
| Michael Weening President & CEO, Director | Oct 30, 2025 | Option exercise | +200,000 | $7.84 | $1.57M | 216,117 |
| Michael Weening President & CEO, Director | Sep 11, 2025 | Option exercise | +18,010 | $7.84 | $141.20K | 34,127 |
| Michael Weening President & CEO, Director | Sep 11, 2025 | Sale(10b5-1 plan) | −18,010 | $63.00 | $1.13M | 16,117 |
| Michael Weening President & CEO, Director | Sep 10, 2025 | Option exercise | +7,990 | $7.84 | $62.64K | 24,107 |
| Michael Weening President & CEO, Director | Sep 10, 2025 | Sale(10b5-1 plan) | −7,990 | $63.00 | $503.37K | 16,117 |
| Michael Weening President & CEO, Director | Sep 10, 2025 | Sale(10b5-1 plan) | −150,000 | $62.00 | $9.30M | 16,117 |
| Michael Weening President & CEO, Director | Sep 10, 2025 | Option exercise | +150,000 | $7.84 | $1.18M | 166,117 |
| Michael Weening President & CEO, Director | Sep 4, 2025 | Sale(10b5-1 plan) | −24,000 | $60.00 | $1.44M | 16,117 |
| Michael Weening President & CEO, Director | Sep 4, 2025 | Option exercise | +24,000 | $7.84 | $188.16K | 40,117 |
| Michael Weening President & CEO, Director | Aug 28, 2025 | Option exercise | +126,000 | $7.84 | $987.84K | 142,117 |
| Michael Weening President & CEO, Director | Aug 28, 2025 | Sale(10b5-1 plan) | −126,000 | $60.00 | $7.56M | 16,117 |
| Cory Sindelar Chief Financial Officer | Aug 28, 2025 | Option exercise | +10,000 | $5.05 | $50.50K | 86,555 |
| Cory Sindelar Chief Financial Officer | Aug 28, 2025 | Sale(10b5-1 plan) | −10,000 | $60.00 | $600.00K | 76,555 |
| Cory Sindelar Chief Financial Officer | Aug 14, 2025 | Award | +270 | $33.69 | $9.10K | 76,555 |
| Michael Weening President & CEO, Director | Aug 14, 2025 | Award | +305 | $33.69 | $10.28K | 16,117 |
| Michael Weening President & CEO, Director | Aug 4, 2025 | Option exercise | +74,000 | $8.03 | $594.22K | 89,812 |
| Michael Weening President & CEO, Director | Aug 4, 2025 | Sale(10b5-1 plan) | −74,000 | $57.00 | $4.22M | 15,812 |
| Carl Russo Director, 10% owner | Jul 28, 2025 | Sale(10b5-1 plan) | −25,000 | $55.40 | $1.39M | 2,114,188 |
| Cory Sindelar Chief Financial Officer | Jul 23, 2025 | Option exercise | +10,000 | $5.05 | $50.50K | 86,285 |
Awards, option exercises, tax withholding and gifts are shown alongside open-market buys and sales. Each name links to the filing on SEC EDGAR.
Planned insider sales
Notices of proposed sale filed on Form 144 before shares are sold
| Seller | Filed | Shares | Market value | Planned sale | Acquired through |
|---|---|---|---|---|---|
| Carl Russo Officer, Director, 10% Stockholder | Jul 27, 2026 | 75,000 | $2.71M | Jul 27, 2026 | Stock Options |
| Carl Russo Officer, Director, 10% Stockholder | Apr 27, 2026 | 25,000 | $1.08M | Apr 27, 2026 | Stock Options |
| Carl Russo Officer, Director, 10% Stockholder | Feb 3, 2026 | 25,000 | $1.18M | Feb 3, 2026 | Stock Options |
| Eleniak Shane Officer | Nov 10, 2025 | 24,000 | $1.54M | Nov 10, 2025 | Stock Option Exercise |
| J. Sindelar Cory Officer | Nov 6, 2025 | 50,000 | $3.26M | Nov 6, 2025 | Stock Option Exercise |
| Russo Carl Officer, Director, 10% Stockholder | Nov 4, 2025 | 420,000 | $26.92M | Nov 4, 2025 | Purchase |
| Eleniak Shane Officer | Nov 4, 2025 | 50,000 | $3.27M | Nov 4, 2025 | Stock Option Exercise |
| Weening Michael Officer, Director | Nov 3, 2025 | 74,000 | $4.99M | Nov 3, 2025 | Stock Option Exercise |
| J. Sindelar Cory Officer | Oct 31, 2025 | 10,000 | $700.00K | Oct 31, 2025 | Stock Option Exercise |
| J. Sindelar Cory Officer | Oct 30, 2025 | 10,000 | $650.00K | Oct 30, 2025 | Stock Option Exercise |
| Weening Michael Officer, Director | Oct 30, 2025 | 200,000 | $13.07M | Oct 30, 2025 | Stock Option Exercise |
| Weening Michael Officer, Director | Sep 11, 2025 | 18,010 | $1.13M | Sep 11, 2025 | Stock Option Exercise |
| Weening Michael Officer, Director | Sep 10, 2025 | 157,990 | $9.80M | Sep 10, 2025 | Stock Option Exercise |
| Weening Michael Officer, Director | Sep 4, 2025 | 24,000 | $1.44M | Sep 4, 2025 | Stock Option Exercise |
| J. Sindelar Cory Officer | Aug 28, 2025 | 10,000 | $600.00K | Aug 28, 2025 | Stock Option Exercise |