CSG Systems International, Inc.
US ˙ NasdaqGM ˙ US1263491094
DIESES SYMBOL IST NICHT MEHR AKTIV

SecurityCSGS / CSG Systems International, Inc.
InstitutionParallel Advisors, LLC
Latest Disclosed Ownership539 shares
Latest Disclosed Value $ 41,336
Parallel Advisors, LLC ownership in CSGS / CSG Systems International, Inc.

On February 11, 2026 - Parallel Advisors, LLC filed a 13F-HR form disclosing ownership of 539 shares of CSG Systems International, Inc. (US:CSGS) valued at $41,336 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 539 shares of CSG Systems International, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $43,492 USD.

Parallel Advisors, LLC has a history of taking positions in derivatives of the underlying security (CSGS) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

CSGS / CSG Systems International, Inc. Historical Put/Call Ratio
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)
2026-02-11 2025-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 0 0.00 41 20.59 0.0008
2025-11-13 2025-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 0 0.00 35 -2.86 0.0006
2025-07-08 2025-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 0 0.00 35 9.38 0.0007
2025-04-08 2025-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 0 0.00 33 18.52 0.0007
2025-02-10 2024-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 0 0.00 28 3.85 0.0006
2024-11-13 2024-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 0 0.00 26 18.18 0.0006
2024-08-08 2024-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 539 177 48.90 22 22.22 0.0006
2024-05-06 2024-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 362 0 0.00 19 -5.26 0.0005
2024-02-12 2023-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 362 -20 -5.24 19 0.00 0.0006
2024-05-20 2023-09-30 13F/A-1 CSG SYSTEMS INTERNATIONAL Stock 126349109 382 0 0.00 20 -5.00 0.0007
2023-11-14 2023-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 382 0 20 0.0007
2024-05-20 2023-06-30 13F/A-1 CSG SYSTEMS INTERNATIONAL Stock 126349109 382 -155 -28.86 20 -28.57 0.0006
2023-08-04 2023-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 382 -155 20 0.0006
2024-05-20 2023-03-31 13F/A-1 CSG SYSTEMS INTERNATIONAL Stock 126349109 537 24 4.68 29 -3.45 0.0010
2023-04-25 2023-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 537 24 29 0.0010
2023-02-06 2022-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 513 -47 -8.39 29 -3.33 0.0013
2022-11-10 2022-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 560 29 5.46 30 -6.25 0.0014
2022-08-01 2022-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 531 -65 -10.91 32 -15.79 0.0015
2022-04-28 2022-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 596 125 26.54 38 40.74 0.0015
2022-01-20 2021-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 471 89 23.30 27 50.00 0.0010
2021-11-02 2021-09-30 13F/A-1 CSG SYSTEMS INTERNATIONAL Stock 126349109 382 16 4.37 18 5.88 0.0007
2021-08-06 2021-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 366 -44 -10.73 17 -5.56 0.0007
2021-04-23 2021-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 410 -44 -9.69 18 -10.00 0.0008
2021-02-02 2020-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 454 139 44.13 20 53.85 0.0011
2020-10-27 2020-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 315 -78 -19.85 13 -18.75 0.0008
2020-07-16 2020-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 393 131 50.00 16 60.00 0.0010
2020-04-27 2020-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 262 24 10.08 10 -16.67 0.0008
2020-01-30 2019-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 238 0 0.00 12 0.00 0.0009
2019-11-01 2019-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 238 0 0.00 12 0.00 0.0010
2019-08-05 2019-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 238 0 0.00 12 20.00 0.0012
2019-05-01 2019-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 238 -80 -25.16 10 0.00 0.0011
2019-02-05 2018-12-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 318 68 27.20 10 0.00 0.0014
2018-11-01 2018-09-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 250 -75 -23.08 10 -23.08 0.0012
2018-07-30 2018-06-30 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 325 0 0.00 13 -13.33 0.0019
2018-05-08 2018-03-31 13F CSG SYSTEMS INTERNATIONAL Stock 126349109 325 0 0.00 15 7.14 0.0023
2018-02-13 2017-12-31 13F CSG SYS INTL INC COM Stock 126349109 325 0 0.00 14 0.00 0.0023
2017-11-15 2017-09-30 13F/A-1 CSG SYS INTL INC COM Stock 126349109 325 0 0.00 14 7.69 0.0024
2017-08-07 2017-06-30 13F CSG SYS INTL INC COM Stock 126349109 325 0 0.00 13 8.33 0.0025
2017-05-12 2017-03-31 13F/A-1 CSG SYS INTL INC COM Stock 126349109 325 0 0.00 12 -25.00 0.0024
2017-05-12 2017-03-31 13F CSG SYS INTL INC COM Stock 126349109 325 12
2017-02-14 2016-12-31 13F CSG SYS INTL INC COM Stock 126349109 325 325 16 0.0038
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-01-19 2021-12-31 13F CSG SYSTEMS INTERNATIONAL Stock Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-10-22 2021-09-30 13F CSG SYSTEMS INTERNATIONAL Stock Call 366 17 n/a n/a n/a
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.