ACI Worldwide (STU:TSA) Institutional Ownership: 86.01% (As of Aug. 20, 2026)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

STU:TSA ACI Worldwide Inc STU:TSA
82 GF Score
Price €44.40
GF Value €43.79
Valuation Fairly Valued
! 2 Warning Signs
View Full Analysis

What is ACI Worldwide Institutional Ownership?

ACI Worldwide STU:TSA -0.89% 82 Institutional Ownership is 86.01% as of Aug. 20, 2026. GuruFocus rates STU:TSA with a GF Score™ of 82/100 and a GF Value™ of €43.79 (Fairly Valued). The stock has 2 warning signs investors should review.

Institutional ownership is the percentage of shares that are owned by institutions out of the total shares outstanding. As of today, ACI Worldwide's institutional ownership is 86.01%.

Insider Ownership is the percentage of shares that are owned by company insiders relative to the total shares outstanding. As of today, ACI Worldwide's Insider Ownership is 0.00%.

Float Percentage Of Total Shares Outstanding is the percentage of float shares relative to the total shares outstanding. As of today, ACI Worldwide's Float Percentage Of Total Shares Outstanding is 69.21%.

ACI Worldwide Institutional Ownership Historical Data

* Premium members only.

The historical data trend for ACI Worldwide's Institutional Ownership can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

ACI Worldwide Institutional Ownership Chart

ACI Worldwide Historical Data

The historical data trend for ACI Worldwide can be seen below:

2025-10-31 2025-11-30 2025-12-31 2026-01-31 2026-02-28 2026-03-31 2026-04-30 2026-05-31 2026-06-30 2026-07-31
Institutional Ownership 79.58 79.90 80.24 77.98 79.55 79.89 80.73 81.69 84.89 86.01
STU:TSA
82GF Score
ACI Worldwide Inc STU:TSA
Institutional Ownership is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

ACI Worldwide Institutional Ownership Calculation

The percentage of shares that are owned by institutions out of the total shares outstanding.

What does a Institutional Ownership of 86.01% mean?
ACI Worldwide (STU:TSA) has a Institutional Ownership of 86.01% as of Aug. 20, 2026. Institutional ownership equals the percent of shares owned by financial institutions relative to total shares. View historical data on ACI Worldwide and its competitors.
Is ACI Worldwide's Institutional Ownership too high?
ACI Worldwide's current Institutional Ownership is 86.01%. Overall, ACI Worldwide has a GF Score™ of 82/100 and is considered Fairly Valued, reflecting its overall financial health beyond just this single metric.
How does ACI Worldwide's Institutional Ownership compare to PATH and DOX?
ACI Worldwide's Institutional Ownership of 86.01% can be compared against companies in the Software industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Institutional Ownership for a Software company?
A good Institutional Ownership depends on the Software industry context. However, Institutional Ownership should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Institutional Ownership mean?
A high Institutional Ownership can signal that a stock is expensive relative to its fundamentals. Institutional ownership equals the percent of shares owned by financial institutions relative to total shares. View historical data on ACI Worldwide and its competitors. ACI Worldwide's current Institutional Ownership is 86.01%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is ACI Worldwide stock overvalued right now?
Based on GuruFocus' analysis, ACI Worldwide (STU:TSA) is currently considered Fairly Valued. The stock's GF Value™ is €43.79, compared to a current price of €44.40 — trading 1.4% above its estimated fair value. The current Institutional Ownership is 86.01%. ACI Worldwide's overall GF Score™ is 82/100 with 2 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Institutional Ownership calculated?
Institutional Ownership is calculated from a company's financial statements. For ACI Worldwide (STU:TSA), the current Institutional Ownership is 86.01% as of Aug. 20, 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is ACI Worldwide (STU:TSA) Overvalued in 2026?

Based on GuruFocus' analysis, ACI Worldwide stock appears to be overvalued. The current stock price of €44.40 is trading 1.4% above its estimated GF Value™ of €43.79. GuruFocus considers ACI Worldwide to be Fairly Valued.

Key valuation signals for STU:TSA:

  • Institutional Ownership: 86.01%
  • GF Value™: €43.79 vs. price of €44.40 (1.4% above fair value)
  • GF Score™: 82/100 with 2 warning signs

No single metric tells the full story. See the STU:TSA stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

ACI Worldwide Business Description

Other Exchanges ACIW:USATSA:Germany
Address 6060 Coventry Drive, Elkhorn, NE, USA, 68022-6482
ACI Worldwide Inc develops, markets, and installs a portfolio of software products focused on facilitating electronic payments. The firm's products are sold and supported directly and through distribution networks covering three geographic regions - the Americas, EMEA, and Asia Pacific. ACI software products process payment transactions for retail banking clients, billers such as utilities and healthcare providers, and community banks and credit unions. ACI's customers are financial institutions all over the world, but the majority of the revenue is generated in the United States and EMEA regions. The company's operating segment includes Payment Software and Biller. The company generates the majority of its revenue from the Payment Software segment.
82GF Score

Get the complete analysis for STU:TSA

Institutional Ownership is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€44.40
Price
€43.79
GF Value