Ranked by reported Q1 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. | 17.0M | $697.9M | -0.9% | 16.740% | 0.01% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 8.1M | $330.4M | β | 7.925% | 0.02% |
| 3 | FRANKLIN RESOURCES INC | 6.6M | $271.3M | +13.3% | 6.508% | 0.07% |
| 4 | VANGUARD CAPITAL MANAGEMENT LLC | 4.5M | $186.2M | β | 4.466% | 0.00% |
| 5 | STATE STREET CORP | 4.2M | $170.2M | +0.4% | 4.083% | 0.01% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 3.2M | $130.2M | +3.1% | 3.123% | 0.01% |
| 7 | DIMENSIONAL FUND ADVISORS LP | 2.8M | $115.4M | +14.0% | 2.767% | 0.02% |
| 8 | Hood River Capital Management LLC | 2.4M | $98.1M | -21.3% | 2.352% | 0.98% |
| 9 | ALLIANCEBERNSTEIN L.P. | 2.0M | $97.0M | -4.2% | 1.996% | 0.03% |
| 10 | REINHART PARTNERS, INC. | 2.2M | $91.7M | +97.5% | 2.198% | 2.63% |
| 11 | North Reef Capital Management LP | 2.2M | $91.5M | +13.2% | 2.194% | 3.15% |
| 12 | FMR LLC | 2.2M | $88.8M | +88.2% | 2.131% | 0.00% |
| 13 | FULLER & THALER ASSET MANAGEMENT, INC. | 2.1M | $88.2M | +18.3% | 2.115% | 0.30% |
| 14 | MORGAN STANLEY | 1.9M | $78.5M | -12.6% | 1.882% | 0.00% |
| 15 | CONGRESS ASSET MANAGEMENT CO /MA | 1.8M | $75.2M | +31.8% | 1.804% | 0.54% |
| 16 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 1.8M | $72.6M | +5.2% | 1.740% | 0.04% |
| 17 | LONDON CO OF VIRGINIA | 1.7M | $68.9M | +19.9% | 1.653% | 0.42% |
| 18 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.3M | $54.3M | +2.3% | 1.303% | 0.01% |
| 19 | NORTHERN TRUST CORP | 1.2M | $51.2M | +0.5% | 1.228% | 0.01% |
| 20 | RICE HALL JAMES & ASSOCIATES, LLC | 1.0M | $41.1M | +2.3% | 0.987% | 2.29% |
| 21 | NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1000K | $41.0M | -1.6% | 0.983% | 0.07% |
| 22 | Global Alpha Capital Management Ltd. | 916K | $37.6M | +38.1% | 0.901% | 2.26% |
| 23 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 870K | $35.7M | -3.9% | 0.856% | 0.01% |
| 24 | VOYA INVESTMENT MANAGEMENT LLC | 756K | $31.0M | -19.4% | 0.744% | 0.03% |
| 25 | VANGUARD FIDUCIARY TRUST CO | 718K | $29.5M | β | 0.707% | 0.01% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in ACIW β a direct measure of their conviction.
Filings activity in ACIW during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ACIW position in Q1 2026
Institutions that fully closed their ACIW position in Q1 2026
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 371 | 7.0% | 87.00% | 15.42 pp | $4.00B | 15% |
| Q4 2025 | 399 | +1.5% | 102.42% | 8.90 pp | $4.71B | 8.0% |
| Q3 2025 | 393 | +0.8% | 111.32% | +14.10 pp | $5.12B | +15% |
| Q2 2025 | 390 | 2.0% | 97.22% | 19.17 pp | $4.47B | 16% |
| Q1 2025 | 398 | +7.9% | 116.39% | +5.10 pp | $5.35B | +4.6% |
| Q4 2024 | 369 | +2.8% | 111.29% | +4.89 pp | $5.12B | +4.6% |
| Q3 2024 | 359 | +24% | 106.40% | 50.50 pp | $4.89B | 32% |
| Q2 2024 | 289 | β | 156.90% | β | $7.22B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ACIW stock.
Based on Q1 2026 13F filings, institutional ownership of ACI Worldwide, Inc. stands at 87.0%, held across 371 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ACIW, with approximately 17,018,137 shares worth $0.70B as of Q1 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 16 out of 100 (Heavy Distribution). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
49 institutions opened new positions in ACIW during Q1 2026, while 77 fully exited. 89 added to existing positions and 232 trimmed.
ACIW institutional ownership fell by 15.42 percentage points quarter-over-quarter, with a net change of -28 holders.
The top 10 institutions account for 54.7% of all reported 13F value in ACIW, and the top 25 account for 76.8%.
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