Calix, Inc.
US ˙ NYSE ˙ US13100M5094

SecurityCALX / Calix, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership12,449 shares
Latest Disclosed Value $ 609,877
Citigroup Inc reports 17.10% decrease in ownership of CALX / Calix, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 12,449 shares of Calix, Inc. (US:CALX) valued at $609,877 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 15,017 shares of Calix, Inc.. This represents a change in shares of -17.10% during the quarter. The current value of the position is $479,286 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)
2026-05-11 2026-03-31 13F CALIX COM 13100M509 12,449 -2,568 -17.10 610 -23.30 0.0001
2026-02-13 2025-12-31 13F CALIX COM 13100M509 15,017 -28,126 -65.19 795 -70.00 0.0004
2025-11-10 2025-09-30 13F CALIX COM 13100M509 43,143 -55,137 -56.10 2,648 -49.36 0.0012
2025-08-11 2025-06-30 13F CALIX COM 13100M509 98,280 -33,104 -25.20 5,228 12.26 0.0026
2025-05-12 2025-03-31 13F CALIX COM 13100M509 131,384 47,044 55.78 4,656 58.37 0.0024
2025-02-12 2024-12-31 13F CALIX COM 13100M509 84,340 8,730 11.55 2,941 0.27 0.0017
2024-11-12 2024-09-30 13F CALIX COM 13100M509 75,610 31,561 71.65 2,933 87.95 0.0017
2024-08-12 2024-06-30 13F CALIX COM 13100M509 44,049 5,255 13.55 1,561 21.31 0.0010
2024-05-10 2024-03-31 13F CALIX COM 13100M509 38,794 26,661 219.74 1,286 142.64 0.0008
2024-02-09 2023-12-31 13F CALIX COM 13100M509 12,133 8,126 202.80 530 189.62 0.0004
2023-12-06 2023-09-30 13F/A-1 CALIX COM 13100M509 4,007 -18,780 -82.42 184 -83.91 0.0001
2023-11-09 2023-09-30 13F CALIX COM 13100M509 4,007 -18,780 184 0.0001
2023-08-10 2023-06-30 13F CALIX COM 13100M509 22,787 15,623 218.08 1,137 196.87 0.0007
2023-05-11 2023-03-31 13F CALIX COM 13100M509 7,164 -1,733 -19.48 384 -37.01 0.0003
2023-02-09 2022-12-31 13F CALIX COM 13100M509 8,897 -7,411 -45.44 609 -39.02 0.0005
2022-11-10 2022-09-30 13F CALIX COM 13100M509 16,308 4,215 34.85 997 141.40 0.0007
2022-08-10 2022-06-30 13F CALIX COM 13100M509 12,093 2,898 31.52 413 4.82 0.0003
2022-05-12 2022-03-31 13F CALIX COM 13100M509 9,195 -10,482 -53.27 394 -74.97 0.0002
2022-02-10 2021-12-31 13F CALIX COM 13100M509 19,677 4,998 34.05 1,574 117.10 0.0008
2021-11-10 2021-09-30 13F CALIX COM 13100M509 14,679 3,835 35.37 725 40.78 0.0004
2021-08-10 2021-06-30 13F CALIX COM 13100M509 10,844 -95,099 -89.76 515 -85.97 0.0003
2021-05-13 2021-03-31 13F CALIX COM 13100M509 105,943 85,994 431.07 3,672 518.18 0.0024
2021-02-11 2020-12-31 13F CALIX COM 13100M509 19,949 6,702 50.59 594 152.77 0.0004
2020-11-12 2020-09-30 13F CALIX COM 13100M509 13,247 -10,116 -43.30 235 -32.47 0.0002
2020-08-12 2020-06-30 13F CALIX COM 13100M509 23,363 5,573 31.33 348 176.19 0.0003
2020-05-12 2020-03-31 13F CALIX COM 13100M509 17,790 6,065 51.73 126 34.04 0.0001
2020-02-12 2019-12-31 13F CALIX COM 13100M509 11,725 4,373 59.48 94 100.00 0.0001
2019-11-08 2019-09-30 13F CALIX COM 13100M509 7,352 -6,171 -45.63 47 -46.59 0.0000
2019-08-12 2019-06-30 13F CALIX COM 13100M509 13,523 668 5.20 88 -11.11 0.0001
2019-05-13 2019-03-31 13F CALIX COM 13100M509 12,855 -598 -4.45 99 -24.43 0.0001
2019-02-12 2018-12-31 13F CALIX COM 13100M509 13,453 -92 -0.68 131 20.18 0.0001
2018-11-13 2018-09-30 13F CALIX COM 13100M509 13,545 4,803 54.94 109 60.29 0.0001
2018-08-10 2018-06-30 13F CALIX COM 13100M509 8,742 -14 -0.16 68 11.48 0.0001
2018-05-11 2018-03-31 13F CALIX COM 13100M509 8,756 2,405 37.87 61 60.53 0.0001
2018-02-12 2017-12-31 13F CALIX COM 13100M509 6,351 6,261 6,956.67 38 0.0000
2017-11-13 2017-09-30 13F CALIX COM 13100M509 90 -193 -68.20 0 -100.00
2017-08-11 2017-06-30 13F CALIX COM 13100M509 283 -2,283 -88.97 2 -89.47 0.0000
2017-05-12 2017-03-31 13F CALIX COM 13100M509 2,566 -40,209 -94.00 19 -94.22 0.0000
2017-02-10 2016-12-31 13F CALIX COM 13100M509 42,775 38,201 835.18 329 867.65 0.0003
2016-11-10 2016-09-30 13F CALIX COM 13100M509 4,574 3,118 214.15 34 240.00 0.0000
2016-08-12 2016-06-30 13F CALIX COM 13100M509 1,456 -30,084 -95.38 10 -95.54 0.0000
2016-05-13 2016-03-31 13F CALIX COM 13100M509 31,540 13,112 71.15 224 54.48 0.0003
2016-02-12 2015-12-31 13F CALIX COM 13100M509 18,428 18,385 42,755.81 145 0.0001
2015-11-13 2015-09-30 13F CALIX COM 13100M509 43 -4,973 -99.14 0 -100.00
2015-08-13 2015-06-30 13F CALIX COM 13100M509 5,016 1,694 50.99 38 35.71 0.0000
2015-05-14 2015-03-31 13F CALIX COM 13100M509 3,322 -4,829 -59.24 28 -65.85 0.0000
2015-02-17 2014-12-31 13F CALIX COM 13100M509 8,151 5,458 202.67 82 215.38 0.0001
2014-11-14 2014-09-30 13F CALIX COM 13100M509 2,693 577 27.27 26 52.94 0.0000
2014-08-14 2014-06-30 13F CALIX COM 13100M509 2,116 -24,285 -91.99 17 -92.38 0.0000
2014-05-15 2014-03-31 13F CALIX COM 13100M509 26,401 12,722 93.00 223 68.94 0.0002
2014-02-14 2013-12-31 13F CALIX COM 13100M509 13,679 2,261 19.80 132 -8.97 0.0001
2013-11-14 2013-09-30 13F CALIX COM 13100M509 11,418 -2,684 -19.03 145 2.11 0.0001
2013-08-14 2013-06-30 13F CALIX COM 13100M509 14,102 14,102 142 0.0001
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.