CSG Systems International, Inc.
US ˙ NasdaqGM ˙ US1263491094
DETTE SYMBOL ER IKKE LÆNGERE AKTIVT

SecurityCSGS / CSG Systems International, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership6,271 shares
Latest Disclosed Value $ 501,304
Citigroup Inc reports 33.12% decrease in ownership of CSGS / CSG Systems International, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 6,271 shares of CSG Systems International, Inc. (US:CSGS) valued at $501,304 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 9,376 shares of CSG Systems International, Inc.. This represents a change in shares of -33.12% during the quarter. The current value of the position is $506,007 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.

Upgrade to unlock premium data and export to Excel .

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 CSG SYS INTL COM 126349109 6,271 -3,105 -33.12 501 -30.32 0.0001
2026-02-13 2025-12-31 13F CSG SYS INTL COM 126349109 9,376 -9,018 -49.03 719 -39.27 0.0003
2025-11-10 2025-09-30 13F CSG SYS INTL COM 126349109 18,394 -10,650 -36.67 1,184 -37.55 0.0005
2025-08-11 2025-06-30 13F CSG SYS INTL COM 126349109 29,044 -14,968 -34.01 1,897 -28.75 0.0009
2025-05-12 2025-03-31 13F CSG SYS INTL COM 126349109 44,012 -6,802 -13.39 2,661 2.46 0.0014
2025-02-12 2024-12-31 13F CSG SYS INTL COM 126349109 50,814 3,647 7.73 2,597 13.21 0.0015
2024-11-12 2024-09-30 13F CSG SYS INTL COM 126349109 47,167 20,711 78.28 2,295 110.65 0.0013
2024-08-12 2024-06-30 13F CSG SYS INTL COM 126349109 26,456 3,602 15.76 1,089 -7.48 0.0007
2024-05-10 2024-03-31 13F CSG SYS INTL COM 126349109 22,854 1,454 6.79 1,178 3.43 0.0008
2024-02-09 2023-12-31 13F CSG SYS INTL COM 126349109 21,400 351 1.67 1,139 5.76 0.0008
2023-12-06 2023-09-30 13F/A-1 CSG SYS INTL COM 126349109 21,049 -12,280 -36.84 1,076 -38.76 0.0008
2023-11-09 2023-09-30 13F CSG SYS INTL COM 126349109 21,049 -12,280 1,076 0.0003
2023-08-10 2023-06-30 13F CSG SYS INTL COM 126349109 33,329 14,233 74.53 1,758 71.41 0.0012
2023-05-11 2023-03-31 13F CSG SYS INTL COM 126349109 19,096 -3,539 -15.64 1,025 -20.79 0.0007
2023-02-09 2022-12-31 13F CSG SYS INTL COM 126349109 22,635 -1,834 -7.50 1,295 0.00 0.0010
2022-11-10 2022-09-30 13F CSG SYS INTL COM 126349109 24,469 5,956 32.17 1,294 17.21 0.0009
2022-08-10 2022-06-30 13F CSG SYS INTL COM 126349109 18,513 -15,542 -45.64 1,104 -49.01 0.0008
2022-05-12 2022-03-31 13F CSG SYS INTL COM 126349109 34,055 -410 -1.19 2,165 9.01 0.0013
2022-02-10 2021-12-31 13F CSG SYS INTL COM 126349109 34,465 7,407 27.37 1,986 52.30 0.0011
2021-11-10 2021-09-30 13F CSG SYS INTL COM 126349109 27,058 -68,262 -71.61 1,304 -71.00 0.0008
2021-08-10 2021-06-30 13F CSG SYS INTL COM 126349109 95,320 29,821 45.53 4,497 52.96 0.0027
2021-05-13 2021-03-31 13F CSG SYS INTL COM 126349109 65,499 45,887 233.97 2,940 232.58 0.0019
2021-02-11 2020-12-31 13F CSG SYS INTL COM 126349109 19,612 -53,929 -73.33 884 -70.65 0.0005
2020-11-12 2020-09-30 13F CSG SYS INTL COM 126349109 73,541 -513 -0.69 3,012 -1.73 0.0020
2020-08-12 2020-06-30 13F CSG SYS INTL COM 126349109 74,054 -34,057 -31.50 3,065 -32.25 0.0024
2020-05-12 2020-03-31 13F CSG SYS INTL COM 126349109 108,111 -46,249 -29.96 4,524 -43.40 0.0041
2020-02-12 2019-12-31 13F CSG SYS INTL COM 126349109 154,360 129,323 516.53 7,993 517.70 0.0058
2019-11-08 2019-09-30 13F CSG SYS INTL COM 126349109 25,037 14,820 145.05 1,294 159.32 0.0010
2019-08-12 2019-06-30 13F CSG SYS INTL COM 126349109 10,217 -9,795 -48.95 499 -41.09 0.0004
2019-05-13 2019-03-31 13F CSG SYS INTL COM 126349109 20,012 14,180 243.14 847 357.84 0.0008
2019-02-12 2018-12-31 13F CSG SYS INTL COM 126349109 5,832 -4,186 -41.78 185 -53.98 0.0002
2018-11-13 2018-09-30 13F CSG SYS INTL COM 126349109 10,018 -3,395 -25.31 402 -26.64 0.0004
2018-08-10 2018-06-30 13F CSG SYS INTL COM 126349109 13,413 -4,493 -25.09 548 -32.43 0.0005
2018-05-11 2018-03-31 13F CSG SYS INTL COM 126349109 17,906 2,266 14.49 811 18.39 0.0007
2018-02-12 2017-12-31 13F CSG SYS INTL COM 126349109 15,640 -13,349 -46.05 685 -41.10 0.0005
2017-11-13 2017-09-30 13F CSG SYS INTL COM 126349109 28,989 17,103 143.89 1,163 141.29 0.0010
2017-08-11 2017-06-30 13F CSG SYS INTL COM 126349109 11,886 -14,013 -54.11 482 -50.82 0.0004
2017-05-12 2017-03-31 13F CSG SYS INTL COM 126349109 25,899 -25,777 -49.88 980 -60.82 0.0009
2017-02-10 2016-12-31 13F CSG SYS INTL COM 126349109 51,676 35,098 211.71 2,501 265.11 0.0023
2016-11-10 2016-09-30 13F CSG SYS INTL COM 126349109 16,578 8,956 117.50 685 123.13 0.0006
2016-08-12 2016-06-30 13F CSG SYS INTL COM 126349109 7,622 -26,879 -77.91 307 -80.30 0.0003
2016-05-13 2016-03-31 13F CSG SYS INTL COM 126349109 34,501 13,588 64.97 1,558 107.18 0.0018
2016-02-12 2015-12-31 13F CSG SYS INTL COM 126349109 20,913 -1,536 -6.84 752 8.83 0.0007
2015-11-13 2015-09-30 13F CSG SYS INTL COM 126349109 22,449 15,205 209.90 691 201.75 0.0006
2015-08-13 2015-06-30 13F CSG SYS INTL COM 126349109 7,244 53 0.74 229 4.57 0.0002
2015-05-14 2015-03-31 13F CSG SYS INTL COM 126349109 7,191 -11,132 -60.75 219 -52.29 0.0002
2015-02-17 2014-12-31 13F CSG SYS INTL COM 126349109 18,323 13,186 256.69 459 240.00 0.0004
2014-11-14 2014-09-30 13F CSG SYS INTL COM 126349109 5,137 4,849 1,683.68 135 1,587.50 0.0001
2014-08-14 2014-06-30 13F CSG SYS INTL COM 126349109 288 -11,771 -97.61 8 -97.45 0.0000
2014-05-15 2014-03-31 13F CSG SYS INTL COM 126349109 12,059 -13,585 -52.98 314 -58.36 0.0003
2014-02-14 2013-12-31 13F CSG SYS INTL COM 126349109 25,644 8,681 51.18 754 77.83 0.0007
2013-11-14 2013-09-30 13F CSG SYS INTL COM 126349109 16,963 -8,068 -32.23 424 -21.92 0.0004
2013-08-14 2013-06-30 13F CSG SYS INTL COM 126349109 25,031 25,031 543 0.0005
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.