ACI Worldwide, Inc. (ACIW) Ownership
ACIW ownership summary
as of October 18, 2026- Institutions
- 105.1% of shares outstanding
- Insiders
- 1.24% of shares outstanding
- Shares outstanding
- 101.0M
- Float
- 99.6M shares available to trade
- Short interest
- 9.15% 6.4M shares short
- Days to cover
- 8.42 short interest down 0.5% vs prior month
- Institutions 105.14%
- Insiders 1.24%
ACIW top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 16.23% | 16.4M | $864.9M | −636,736 (−3.7%) | June 30, 2026 |
| 2 | Vanguard Portfolio Management, LLC | 8.04% | 8.1M | $428.3M | +55,710 (+0.7%) | June 30, 2026 |
| 3 | Franklin Templeton Inc | 6.63% | 6.7M | $353.5M | +78,793 (+1.2%) | June 30, 2026 |
| 4 | FMR Inc | 6.48% | 6.5M | $345.6M | +4.4M (+202.2%) | June 30, 2026 |
| 5 | Vanguard Capital Management, LLC | 4.54% | 4.6M | $242.2M | +46,486 (+1.0%) | June 30, 2026 |
| 6 | State Street Corp | 4.25% | 4.3M | $226.8M | +143,982 (+3.5%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 3.37% | 3.4M | $179.5M | +224,237 (+7.1%) | June 30, 2026 |
| 8 | Dimensional Fund Advisors, Inc. | 3.13% | 3.2M | $166.6M | +342,329 (+12.2%) | June 30, 2026 |
| 9 | Fuller & Thaler Asset Management Inc | 2.71% | 2.7M | $144.3M | +582,559 (+27.1%) | June 30, 2026 |
| 10 | North Reef Capital Management LP | 2.59% | 2.6M | $138.2M | +387,000 (+17.4%) | June 30, 2026 |
| 11 | Hood River Capital Management LLC | 2.31% | 2.3M | $123.0M | −61,450 (−2.6%) | June 30, 2026 |
| 12 | AllianceBernstein L.P. | 2.31% | 2.3M | $122.9M | +298,992 (+14.7%) | June 30, 2026 |
| 13 | Morgan Stanley - Brokerage Accounts | 2.08% | 2.1M | $111.1M | +190,262 (+9.9%) | June 30, 2026 |
| 14 | Arrowstreet Capital Limited Partnership | 1.74% | 1.8M | $93.0M | −8,558 (−0.5%) | June 30, 2026 |
| 15 | London Company of Virginia | 1.58% | 1.6M | $84.2M | −86,307 (−5.1%) | June 30, 2026 |
| 16 | Congress Asset Management Company, LLP | 1.58% | 1.6M | $84.1M | −241,502 (−13.2%) | June 30, 2026 |
| 17 | Reinhart Mahoney Capital Management Inc | 1.39% | 1.4M | $74.2M | −1.0M (−42.0%) | September 30, 2026 |
| 18 | Charles Schwab Investment Management Inc | 1.33% | 1.3M | $70.9M | +17,826 (+1.3%) | June 30, 2026 |
| 19 | NORGES BANK | 1.30% | 1.3M | $69.1M | +164,098 (+14.3%) | June 30, 2026 |
| 20 | Northern Trust Corp | 1.26% | 1.3M | $67.1M | +22,521 (+1.8%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 6.9M shares and 6 cut 2.1M.
ACIW top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.96% | 6.0M | $317.5M | +1,311 (+0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.21% | 3.2M | $171.1M | −4,448 (−0.1%) | August 31, 2026 |
| 3 | iShares Russell 2000 ETF | 2.68% | 2.7M | $143.1M | −18,830 (−0.7%) | September 30, 2026 |
| 4 | FullerThaler Behavioral Sm-Cp Eq R6 | 2.59% | 2.6M | $138.0M | +558,500 (+27.2%) | June 30, 2026 |
| 5 | Franklin Small Cap Value A | 2.49% | 2.5M | $132.5M | −16,460 (−0.7%) | August 31, 2026 |
| 6 | Vanguard Small Cap Index | 2.25% | 2.3M | $119.9M | −69,478 (−3.0%) | September 30, 2026 |
| 7 | Vanguard Information Technology ETF | 1.96% | 2.0M | $104.2M | +4,547 (+0.2%) | September 30, 2026 |
| 8 | Fidelity Low-Priced Stock | 1.60% | 1.6M | $85.3M | — | July 31, 2026 |
| 9 | Strategic Advisers Fidelity US TtlStk | 1.32% | 1.3M | $70.4M | +55,844 (+4.4%) | August 31, 2026 |
| 10 | Vanguard MStar Small Cap Growth Indx Inv | 1.25% | 1.3M | $66.8M | −78,039 (−5.8%) | September 30, 2026 |
| 11 | Hood River Small-Cap Growth Instl | 1.20% | 1.2M | $64.1M | −95,404 (−7.3%) | June 30, 2026 |
| 12 | Fidelity Small Cap Index | 1.11% | 1.1M | $59.4M | +9,245 (+0.8%) | July 31, 2026 |
| 13 | iShares Russell 2000 Growth ETF | 0.96% | 968K | $51.1M | −1,225 (−0.1%) | September 30, 2026 |
| 14 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 919K | $48.5M | — | September 30, 2026 |
| 15 | Putnam Small Cap Growth A | 0.90% | 912K | $48.2M | −16,340 (−1.8%) | August 31, 2026 |
| 16 | Nomura Small Cap Value A | 0.84% | 849K | $44.8M | — | August 31, 2026 |
| 17 | Fidelity Small Cap Growth | 0.83% | 839K | $44.3M | +838,560 (0.0%) | July 31, 2026 |
| 18 | Franklin Small Cap Value VIP 1 | 0.76% | 767K | $40.5M | −7,985 (−1.0%) | August 31, 2026 |
| 19 | Fidelity Enhanced Small Cap Core ETF | 0.75% | 757K | $40.0M | +1,587 (+0.2%) | September 30, 2026 |
| 20 | Congress Small Cap Growth Institutional | 0.73% | 740K | $39.1M | +20,000 (+2.8%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ACIW insider transactions
latest 10| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-03 | Juan Benitez II | Buy | $41.90 | 2,400 | $100,560 |
| 2026-03-02 | Adalio T Sanchez | Buy | $40.98 | 3,000 | $122,940 |
| 2025-11-10 | Abraham Kuruvilla | Sell | $47.69 | 4,210 | $200,775 |
| 2025-10-31 | Lisa C. McClain | Sell | $47.63 | — | — |
| 2025-10-30 | Lisa C. McClain | Buy | $47.23 | — | — |
| 2025-10-30 | Lisa C. McClain | Sell | $47.23 | — | — |
| 2025-08-19 | Lisa C. McClain | Buy | $47.03 | — | — |
| 2025-06-18 | Janet O Estep | Sell | $44.66 | 4,500 | $200,970 |
| 2025-06-10 | Mary P Harman | Sell | $47.48 | 7,194 | $341,571 |
| 2025-05-12 | Thomas W Warsop III | Buy | $48.57 | 5,000 | $242,850 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ACIW shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ACIW
Institutional investors own 105.1% of ACI Worldwide's shares and insiders 1.24%. The largest holder is BlackRock Inc with 16.23% of the shares (16.4M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 9.15% of the float, or 8.42 days of average trading volume. The share count fell 11.6% since 2014.
Related: ACIW analyst forecast, ACIW key metrics. See the ACIW stock overview for the latest quote and news.
ACIW ownership FAQ
Who owns the most ACI Worldwide stock?
The largest shareholders of ACI Worldwide are BlackRock Inc (16.23%), Vanguard Portfolio Management, LLC (8.04%), Franklin Templeton Inc (6.63%), FMR Inc (6.48%), Vanguard Capital Management, LLC (4.54%).
What percentage of ACI Worldwide is owned by institutions?
Institutions hold 105.1% of ACI Worldwide's shares outstanding; insiders hold 1.24%.
Which funds own ACI Worldwide?
The largest fund holders of ACI Worldwide are iShares Core S&P Small-Cap ETF (5.96%), Vanguard MStar Total Stk Mkt Idx Invest (3.21%), iShares Russell 2000 ETF (2.68%), FullerThaler Behavioral Sm-Cp Eq R6 (2.59%), Franklin Small Cap Value A (2.49%).
What is ACI Worldwide's short interest?
6.4M shares of ACI Worldwide were sold short, 9.15% of the float; at the average daily volume it would take 8.42 days to cover.
Are insiders buying or selling ACI Worldwide?
Of the latest 10 reported insider transactions in ACI Worldwide (since May 12, 2025), 5 were purchases and 5 were sales.
How many shares of ACI Worldwide are outstanding?
ACI Worldwide has 101.0M shares outstanding, of which 99.6M are in the public float.