Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in ACIW held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 16.4M | $823.8M | -3.7% | 16.114% | 0.01% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 8.1M | $408.0M | +0.7% | 7.980% | 0.02% |
| 3 | FRANKLIN RESOURCES INC | 6.7M | $336.7M | +1.2% | 6.586% | 0.07% |
| 4 | FMR LLC | 6.5M | $329.2M | +202.2% | 6.439% | 0.01% |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | 4.6M | $230.7M | +1.0% | 4.512% | 0.00% |
| 6 | STATE STREET CORP | 4.3M | $215.9M | +3.5% | 4.225% | 0.00% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 3.4M | $171.0M | +7.1% | 3.343% | 0.01% |
| 8 | DIMENSIONAL FUND ADVISORS LP | 3.2M | $158.7M | +12.2% | 3.104% | 0.03% |
| 9 | FULLER & THALER ASSET MANAGEMENT, INC. | 2.7M | $137.4M | +27.1% | 2.688% | 0.37% |
| 10 | North Reef Capital Management LP | 2.6M | $131.6M | +17.3% | 2.574% | 5.05% |
| 11 | REINHART PARTNERS, LLC. | 2.4M | $121.9M | +8.5% | 2.385% | 2.78% |
| 12 | Hood River Capital Management LLC | 2.3M | $117.2M | -2.6% | 2.292% | 0.85% |
| 13 | MORGAN STANLEY | 2.1M | $105.8M | +10.0% | 2.069% | 0.01% |
| 14 | ALLIANCEBERNSTEIN L.P. | 2.3M | $95.5M | +14.7% | 2.290% | 0.03% |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.8M | $88.5M | -0.5% | 1.732% | 0.04% |
| 16 | LONDON CO OF VIRGINIA | 1.6M | $80.2M | -5.1% | 1.568% | 0.46% |
| 17 | CONGRESS ASSET MANAGEMENT CO | 1.6M | $80.1M | -13.2% | 1.566% | 0.49% |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $67.5M | +1.4% | 1.320% | 0.01% |
| 19 | NORGES BANK | 1.3M | $65.8M | — | 1.288% | 0.01% |
| 20 | NORTHERN TRUST CORP | 1.3M | $63.9M | +1.8% | 1.250% | 0.01% |
| 21 | RICE HALL JAMES & ASSOCIATES, LLC | 1.0M | $50.6M | +0.3% | 0.990% | 2.46% |
| 22 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 962K | $48.4M | -3.8% | 0.946% | 0.07% |
| 23 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 778K | $39.1M | -10.6% | 0.765% | 0.01% |
| 24 | GOLDMAN SACHS GROUP INC | 744K | $37.4M | +23.0% | 0.732% | 0.00% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 730K | $36.7M | +1.7% | 0.718% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ACIW — a direct measure of their conviction.
Filings activity in ACIW during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 378 | +0.0% | 102.59% | +3.51 pp | $5.08B | +26% |
| Q1 2026 | 378 | 5.3% | 99.08% | 1.37 pp | $4.02B | 15% |
| Q4 2025 | 399 | +1.5% | 100.45% | 2.71 pp | $4.71B | 8.0% |
| Q3 2025 | 393 | +0.8% | 103.16% | +3.22 pp | $5.12B | +15% |
| Q2 2025 | 390 | 2.0% | 99.94% | 0.61 pp | $4.47B | 16% |
| Q1 2025 | 398 | +7.9% | 100.55% | 0.68 pp | $5.35B | +4.6% |
| Q4 2024 | 369 | +2.8% | 101.23% | +2.46 pp | $5.12B | +4.6% |
| Q3 2024 | 359 | — | 98.77% | — | $4.89B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ACIW stock.
Based on Q2 2026 13F filings, institutional ownership of ACI Worldwide, Inc. stands at 102.6%, held across 378 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ACIW, with approximately 16,381,401 shares worth $0.82B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of ACIW.
Our composite Smart Money Score for ACIW is 47 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
44 institutions opened new positions in ACIW during Q2 2026, while 47 fully exited. 266 added to existing positions and 58 trimmed.
ACIW institutional ownership rose by 3.51 percentage points quarter-over-quarter, with a net change of +0 holders.
The top 10 institutions account for 58.0% of all reported 13F value in ACIW, and the top 25 account for 79.6%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
ACI Worldwide, Inc. (ACIW) Institutional Ownership