Calix, Inc.
US ˙ NYSE ˙ US13100M5094

SecurityCALX / Calix, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership216,536 shares
Latest Disclosed Value $ 11,461,282
Sei Investments Co reports 24.91% increase in ownership of CALX / Calix, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 216,536 shares of Calix, Inc. (US:CALX) valued at $11,461,250 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 173,358 shares of Calix, Inc.. This represents a change in shares of 24.91% during the quarter. The current value of the position is $8,336,636 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-02-13 2025-12-31 13F CALIX COM 13100M509 216,536 43,178 24.91 11,461 7.73 0.0113
2025-11-13 2025-09-30 13F CALIX COM 13100M509 173,358 42,541 32.52 10,639 52.90 0.0114
2025-08-14 2025-06-30 13F CALIX COM 13100M509 130,817 53,521 69.24 6,958 154.03 0.0081
2025-05-14 2025-03-31 13F/A-1 CALIX COM 13100M509 77,296 16,109 26.33 2,739 28.41 0.0035
2025-05-13 2025-03-31 13F CALIX COM 13100M509 61,192 5 2,134 0.0023
2025-02-11 2024-12-31 13F CALIX COM 13100M509 61,187 -4,190 -6.41 2,134 -15.86 0.0027
2024-11-12 2024-09-30 13F CALIX COM 13100M509 65,377 -10,705 -14.07 2,536 -5.94 0.0033
2024-08-13 2024-06-30 13F CALIX COM 13100M509 76,082 -1,465 -1.89 2,696 4.82 0.0038
2024-05-07 2024-03-31 13F CALIX COM 13100M509 77,547 -5,600 -6.74 2,571 -29.21 0.0038
2024-02-14 2023-12-31 13F CALIX COM 13100M509 83,147 -58,451 -41.28 3,633 -44.04 0.0058
2023-11-14 2023-09-30 13F CALIX COM 13100M509 141,598 -52,846 -27.18 6,491 -33.12 0.0117
2023-08-11 2023-06-30 13F CALIX COM 13100M509 194,444 29,143 17.63 9,705 9.55 0.0169
2023-05-12 2023-03-31 13F CALIX COM 13100M509 165,301 70,416 74.21 8,858 36.44 0.0165
2023-02-10 2022-12-31 13F CALIX COM 13100M509 94,885 -129,245 -57.67 6,493 -52.62 0.0144
2022-11-14 2022-09-30 13F CALIX COM 13100M509 224,130 -478 -0.21 13,703 78.70 0.0306
2022-08-15 2022-06-30 13F CALIX COM 13100M509 224,608 123,576 122.31 7,668 76.89 0.0166
2022-05-13 2022-03-31 13F CALIX COM 13100M509 101,032 -44,788 -30.71 4,335 -62.82 0.0087
2022-02-14 2021-12-31 13F CALIX COM 13100M509 145,820 -31,478 -17.75 11,661 33.06 0.0219
2021-11-12 2021-09-30 13F CALIX COM 13100M509 177,298 -12,469 -6.57 8,764 -2.77 0.0184
2021-08-06 2021-06-30 13F CALIX COM 13100M509 189,767 95,738 101.82 9,014 198.87 0.0200
2021-05-12 2021-03-31 13F CALIX COM 13100M509 94,029 33,876 56.32 3,016 70.30 0.0076
2021-02-08 2020-12-31 13F CALIX COM 13100M509 60,153 -24,670 -29.08 1,771 17.36 0.0046
2020-12-04 2020-09-30 13F/A-1 CALIX COM 13100M509 84,823 37,355 78.70 1,509 113.44 0.0044
2020-11-06 2020-09-30 13F CALIX COM 13100M509 84,823 37,355 1,509 3,633.3365
2020-08-17 2020-06-30 13F/A-1 CALIX COM 13100M509 47,468 47,468 707 0.0022
2020-08-11 2020-06-30 13F CALIX COM 13100M509 47,468 47,468 707 1,917.7751
2015-05-01 2015-03-31 13F CALIX COM 13100M509 0 -73,638 -100.00 0 -100.00
2015-02-10 2014-12-31 13F CALIX COM 13100M509 73,638 73,638 738 0.0065
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.