ACI Worldwide, Inc.
US ˙ NasdaqGS ˙ US0044981019

SecurityACIW / ACI Worldwide, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership459,742 shares
Latest Disclosed Value $ 21,980,182
Sei Investments Co reports 4.25% decrease in ownership of ACIW / ACI Worldwide, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 459,742 shares of ACI Worldwide, Inc. (US:ACIW) valued at $21,980,265 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 480,138 shares of ACI Worldwide, Inc.. This represents a change in shares of -4.25% during the quarter. The current value of the position is $19,106,878 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 ACI WORLDWIDE COM 004498101 459,742 -20,396 -4.25 21,980 -13.25 0.0217
2025-11-13 2025-09-30 13F ACI WORLDWIDE COM 004498101 480,138 43,309 9.91 25,337 26.34 0.0272
2025-08-14 2025-06-30 13F ACI WORLDWIDE COM 004498101 436,829 2,540 0.58 20,055 -15.59 0.0232
2025-05-14 2025-03-31 13F/A-1 ACI WORLDWIDE COM 004498101 434,289 28,658 7.07 23,760 12.84 0.0306
2025-05-13 2025-03-31 13F ACI WORLDWIDE COM 004498101 404,450 -1,181 21,139 0.0230
2025-02-11 2024-12-31 13F ACI WORLDWIDE COM 004498101 405,631 12,463 3.17 21,056 5.22 0.0270
2024-11-12 2024-09-30 13F ACI WORLDWIDE COM 004498101 393,168 -34,768 -8.12 20,012 18.13 0.0260
2024-08-13 2024-06-30 13F ACI WORLDWIDE COM 004498101 427,936 11,638 2.80 16,942 22.54 0.0240
2024-05-07 2024-03-31 13F ACI WORLDWIDE COM 004498101 416,298 -108,140 -20.62 13,825 -13.85 0.0203
2024-02-14 2023-12-31 13F ACI WORLDWIDE COM 004498101 524,438 70,269 15.47 16,048 56.62 0.0258
2023-11-14 2023-09-30 13F ACI WORLDWIDE COM 004498101 454,169 -89 -0.02 10,246 -2.65 0.0184
2023-08-11 2023-06-30 13F ACI WORLDWIDE COM 004498101 454,258 21,988 5.09 10,525 -9.75 0.0184
2023-05-12 2023-03-31 13F ACI WORLDWIDE COM 004498101 432,270 -109,321 -20.19 11,663 -6.37 0.0217
2023-02-10 2022-12-31 13F ACI WORLDWIDE COM 004498101 541,591 37,394 7.42 12,457 18.20 0.0277
2022-11-14 2022-09-30 13F ACI WORLDWIDE COM 004498101 504,197 -30,540 -5.71 10,538 -23.67 0.0235
2022-08-15 2022-06-30 13F ACI WORLDWIDE COM 004498101 534,737 51,894 10.75 13,806 -9.16 0.0298
2022-05-13 2022-03-31 13F ACI WORLDWIDE COM 004498101 482,843 4,137 0.86 15,198 -8.53 0.0305
2022-02-14 2021-12-31 13F ACI WORLDWIDE COM 004498101 478,706 38,517 8.75 16,616 22.81 0.0312
2021-11-12 2021-09-30 13F ACI WORLDWIDE COM 004498101 440,189 -3,704 -0.83 13,530 -17.91 0.0284
2021-08-06 2021-06-30 13F ACI WORLDWIDE COM 004498101 443,893 1,293 0.29 16,481 -2.14 0.0365
2021-05-12 2021-03-31 13F ACI WORLDWIDE COM 004498101 442,600 28,703 6.93 16,841 5.89 0.0424
2021-02-08 2020-12-31 13F ACI WORLDWIDE COM 004498101 413,897 -42,425 -9.30 15,904 33.37 0.0411
2020-12-04 2020-09-30 13F/A-1 ACI WORLDWIDE COM 004498101 456,322 -75,173 -14.14 11,925 -16.88 0.0345
2020-11-06 2020-09-30 13F ACI WORLDWIDE COM 004498101 466,235 -65,260 12,184 29,336.3630
2020-08-17 2020-06-30 13F/A-1 ACI WORLDWIDE COM 004498101 531,495 40,454 8.24 14,346 20.99 0.0445
2020-08-11 2020-06-30 13F ACI WORLDWIDE COM 004498101 470,435 -20,606 17,672 47,936.2407
2020-05-14 2020-03-31 13F ACI WORLDWIDE COM 004498101 491,041 23,511 5.03 11,857 -33.05 0.0436
2020-02-06 2019-12-31 13F ACI WORLDWIDE COM 004498101 467,530 -258,492 -35.60 17,710 -22.14 0.0528
2019-11-12 2019-09-30 13F ACI WORLDWIDE COM 004498101 726,022 313,940 76.18 22,747 60.71 0.0582
2019-08-14 2019-06-30 13F ACI WORLDWIDE COM 004498101 412,082 -19,243 -4.46 14,154 -0.19 0.0462
2019-05-15 2019-03-31 13F ACI WORLDWIDE COM 004498101 431,325 -65,151 -13.12 14,181 1.71 0.0476
2019-02-13 2018-12-31 13F ACI WORLDWIDE COM 004498101 496,476 59,211 13.54 13,943 13.31 0.0496
2018-11-08 2018-09-30 13F ACI WORLDWIDE COM 004498101 437,265 148,438 51.39 12,305 72.70 0.0446
2018-08-03 2018-06-30 13F ACI WORLDWIDE COM 004498101 288,827 275,330 2,039.93 7,125 2,126.56 0.0242
2018-05-11 2018-03-31 13F ACI WORLDWIDE COM 004498101 13,497 -300,264 -95.70 320 -95.50 0.0012
2018-02-08 2017-12-31 13F ACI WORLDWIDE COM 004498101 313,761 46,848 17.55 7,113 16.99 0.0247
2017-11-06 2017-09-30 13F ACI WORLDWIDE COM 004498101 266,913 -51,556 -16.19 6,080 -14.65 0.0216
2017-07-31 2017-06-30 13F ACI WORLDWIDE COM 004498101 318,469 18,496 6.17 7,124 11.02 0.0284
2017-05-05 2017-03-31 13F ACI WORLDWIDE COM 004498101 299,973 31,815 11.86 6,417 31.85 0.0281
2017-02-02 2016-12-31 13F ACI WORLDWIDE COM 004498101 268,158 20,003 8.06 4,867 1.21 0.0236
2016-11-04 2016-09-30 13F ACI WORLDWIDE COM 004498101 248,155 -1,578 -0.63 4,809 -1.31 0.0244
2016-08-11 2016-06-30 13F ACI WORLDWIDE COM 004498101 249,733 96 0.04 4,873 -6.11 0.0292
2016-05-10 2016-03-31 13F/A-1 ACI WORLDWIDE COM 004498101 249,637 18,273 7.90 5,190 4.81 0.0323
2016-02-03 2015-12-31 13F ACI WORLDWIDE COM 004498101 231,364 231,355 2,570,611.11 4,952 0.0302
2015-11-02 2015-09-30 13F/A-1 ACI WORLDWIDE COM 004498101 9 0 0.00 0 0.0000
2015-10-30 2015-09-30 13F ACI WORLDWIDE COM 004498101 9 1
2015-08-07 2015-06-30 13F/A-1 ACI WORLDWIDE COM 004498101 9 0 0.00 0 0.0000
2015-08-04 2015-06-30 13F ACI WORLDWIDE COM 004498101 9 -367,610 0
2015-05-14 2015-03-31 13F/A-1 ACI WORLDWIDE COM 004498101 9 0 0.00 0 0.0000
2015-05-01 2015-03-31 13F ACI WORLDWIDE COM 004498101 9 0
2015-02-10 2014-12-31 13F ACI WORLDWIDE COM 004498101 9 9 0 0.0000
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.