ACI Worldwide, Inc.
US ˙ NasdaqGS ˙ US0044981019

SecurityACIW / ACI Worldwide, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership146,682 shares
Latest Disclosed Value $ 6,015,428
Citigroup Inc ownership in ACIW / ACI Worldwide, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 146,682 shares of ACI Worldwide, Inc. (US:ACIW) valued at $6,015,429 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 180,563 shares of ACI Worldwide, Inc.. This represents a change in shares of -18.76% during the quarter. The current value of the position is $6,096,104 USD.

Citigroup Inc has a history of taking positions in derivatives of the underlying security (ACIW) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put 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.

ACIW / ACI Worldwide, 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)
2026-05-11 2026-03-31 13F ACI WORLDWIDE COM 004498101 146,682 -33,881 -18.76 6,015 -30.32 0.0013
2026-02-13 2025-12-31 13F ACI WORLDWIDE COM 004498101 180,563 100,846 126.51 8,633 105.23 0.0038
2025-11-10 2025-09-30 13F ACI WORLDWIDE COM 004498101 79,717 -49,318 -38.22 4,207 -28.99 0.0019
2025-08-11 2025-06-30 13F ACI WORLDWIDE COM 004498101 129,035 -60,258 -31.83 5,924 -42.81 0.0029
2025-05-12 2025-03-31 13F ACI WORLDWIDE COM 004498101 189,293 19,624 11.57 10,356 17.59 0.0053
2025-02-12 2024-12-31 13F ACI WORLDWIDE COM 004498101 169,669 12,160 7.72 8,808 9.85 0.0052
2024-11-12 2024-09-30 13F ACI WORLDWIDE COM 004498101 157,509 50,145 46.71 8,017 88.64 0.0046
2024-08-12 2024-06-30 13F ACI WORLDWIDE COM 004498101 107,364 -6,219 -5.48 4,251 12.67 0.0027
2024-05-10 2024-03-31 13F ACI WORLDWIDE COM 004498101 113,583 11,470 11.23 3,772 20.74 0.0025
2024-02-09 2023-12-31 13F ACI WORLDWIDE COM 004498101 102,113 50,820 99.08 3,125 170.01 0.0022
2023-12-06 2023-09-30 13F/A-1 ACI WORLDWIDE COM 004498101 51,293 -44,401 -46.40 1,157 -47.81 0.0009
2023-11-09 2023-09-30 13F ACI WORLDWIDE COM 004498101 51,293 -44,401 1,157 0.0009
2023-08-10 2023-06-30 13F ACI WORLDWIDE COM 004498101 95,694 -45,518 -32.23 2,217 -41.80 0.0015
2023-05-11 2023-03-31 13F ACI WORLDWIDE COM 004498101 141,212 72,374 105.14 3,810 140.62 0.0027
2023-02-09 2022-12-31 13F ACI WORLDWIDE COM 004498101 68,838 -17,189 -19.98 1,583 -11.96 0.0013
2022-11-10 2022-09-30 13F ACI WORLDWIDE COM 004498101 86,027 8,691 11.24 1,798 -10.23 0.0013
2022-08-10 2022-06-30 13F ACI WORLDWIDE COM 004498101 77,336 17,793 29.88 2,003 6.77 0.0015
2022-05-12 2022-03-31 13F ACI WORLDWIDE COM 004498101 59,543 -46,590 -43.90 1,876 -49.06 0.0011
2022-02-10 2021-12-31 13F ACI WORLDWIDE COM 004498101 106,133 8,655 8.88 3,683 22.97 0.0020
2021-11-10 2021-09-30 13F ACI WORLDWIDE COM 004498101 97,478 -23,509 -19.43 2,995 -33.34 0.0018
2021-08-10 2021-06-30 13F ACI WORLDWIDE COM 004498101 120,987 -2,264 -1.84 4,493 -4.20 0.0027
2021-05-13 2021-03-31 13F ACI WORLDWIDE COM 004498101 123,251 -33,275 -21.26 4,690 -22.04 0.0030
2021-02-11 2020-12-31 13F ACI WORLDWIDE COM 004498101 156,526 94,713 153.23 6,016 272.51 0.0036
2020-11-12 2020-09-30 13F ACI WORLDWIDE COM 004498101 61,813 -18,147 -22.70 1,615 -25.16 0.0011
2020-08-12 2020-06-30 13F ACI WORLDWIDE COM 004498101 79,960 -21,524 -21.21 2,158 -11.95 0.0017
2020-05-12 2020-03-31 13F ACI WORLDWIDE COM 004498101 101,484 15,176 17.58 2,451 -25.02 0.0022
2020-02-12 2019-12-31 13F ACI WORLDWIDE COM 004498101 86,308 17,824 26.03 3,269 52.33 0.0024
2019-11-08 2019-09-30 13F ACI WORLDWIDE COM 004498101 68,484 -11,227 -14.08 2,146 -21.59 0.0017
2019-08-12 2019-06-30 13F ACI WORLDWIDE COM 004498101 79,711 74,652 1,475.63 2,737 1,548.80 0.0022
2019-05-13 2019-03-31 13F ACI WORLDWIDE COM 004498101 5,059 -20,607 -80.29 166 -76.65 0.0002
2019-02-12 2018-12-31 13F ACI WORLDWIDE COM 004498101 25,666 18,367 251.64 711 245.15 0.0007
2018-11-13 2018-09-30 13F ACI WORLDWIDE COM 004498101 7,299 1,820 33.22 206 52.59 0.0002
2018-08-10 2018-06-30 13F ACI WORLDWIDE COM 004498101 5,479 318 6.16 135 10.66 0.0001
2018-05-11 2018-03-31 13F ACI WORLDWIDE COM 004498101 5,161 788 18.02 122 23.23 0.0001
2018-02-12 2017-12-31 13F ACI WORLDWIDE COM 004498101 4,373 -13,032 -74.88 99 -75.00 0.0001
2017-11-13 2017-09-30 13F ACI WORLDWIDE COM 004498101 17,405 13,816 384.95 396 395.00 0.0003
2017-08-11 2017-06-30 13F ACI WORLDWIDE COM 004498101 3,589 173 5.06 80 9.59 0.0001
2017-05-12 2017-03-31 13F ACI WORLDWIDE COM 004498101 3,416 -122,256 -97.28 73 -96.80 0.0001
2017-02-10 2016-12-31 13F ACI WORLDWIDE COM 004498101 125,672 73,982 143.13 2,281 127.64 0.0021
2016-11-10 2016-09-30 13F ACI WORLDWIDE COM 004498101 51,690 32,300 166.58 1,002 165.08 0.0009
2016-08-12 2016-06-30 13F ACI WORLDWIDE COM 004498101 19,390 -96,479 -83.27 378 -84.30 0.0004
2016-05-13 2016-03-31 13F ACI WORLDWIDE COM 004498101 115,869 107,126 1,225.28 2,408 1,187.70 0.0027
2016-02-12 2015-12-31 13F ACI WORLDWIDE COM 004498101 8,743 -927 -9.59 187 -8.33 0.0002
2015-11-13 2015-09-30 13F ACI WORLDWIDE COM 004498101 9,670 -524 -5.14 204 -18.73 0.0002
2015-08-13 2015-06-30 13F ACI WORLDWIDE COM 004498101 10,194 2,181 27.22 251 45.09 0.0002
2015-05-14 2015-03-31 13F ACI WORLDWIDE COM 004498101 8,013 659 8.96 173 16.89 0.0002
2015-02-17 2014-12-31 13F ACI WORLDWIDE COM 004498101 7,354 -2,664 -26.59 148 -21.28 0.0001
2014-11-14 2014-09-30 13F ACI WORLDWIDE COM 004498101 10,018 7,463 292.09 188 31.47 0.0002
2014-08-14 2014-06-30 13F ACI WORLDWIDE COM 004498101 2,555 489 23.67 143 16.26 0.0001
2014-05-15 2014-03-31 13F ACI WORLDWIDE COM 004498101 2,066 -3,100 -60.01 123 -63.39 0.0001
2014-02-14 2013-12-31 13F ACI WORLDWIDE COM 004498101 5,166 -4,225 -44.99 336 -33.73 0.0003
2013-11-14 2013-09-30 13F ACI WORLDWIDE COM 004498101 9,391 4,443 89.79 507 120.43 0.0005
2013-08-14 2013-06-30 13F ACI WORLDWIDE COM 004498101 4,948 4,948 230 0.0002
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
(%)
2021-05-13 2021-03-31 13F ACI WORLDWIDE COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-11 2020-12-31 13F ACI WORLDWIDE COM Call 55,300 2,125 n/a n/a n/a
Disclosed Put 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
(%)
2023-08-10 2023-06-30 13F ACI WORLDWIDE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-11 2023-03-31 13F ACI WORLDWIDE COM Put 241,300 6,510 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.