Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ACNB held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 623K | $29.8M | +2.3% | 6.013% | 0.00% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 428K | $20.5M | β | 4.131% | 0.00% |
| 3 | FMR LLC | 364K | $17.4M | -38.9% | 3.513% | 0.00% |
| 4 | Private Capital Management, LLC | 360K | $17.2M | -3.0% | 3.475% | 1.72% |
| 5 | DIMENSIONAL FUND ADVISORS LP | 335K | $16.0M | +4.6% | 3.234% | 0.00% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 246K | $11.8M | +2.2% | 2.380% | 0.00% |
| 7 | STATE STREET CORP | 196K | $9.4M | +7.7% | 1.889% | 0.00% |
| 8 | AMERICAN CENTURY COMPANIES INC | 184K | $8.8M | +39.1% | 1.774% | 0.00% |
| 9 | MANUFACTURERS LIFE INSURANCE COMPANY, THE | 163K | $7.8M | +11.9% | 1.574% | 0.01% |
| 10 | BRIDGEWAY CAPITAL MANAGEMENT, LLC | 106K | $5.1M | +0.2% | 1.025% | 0.10% |
| 11 | NORTHERN TRUST CORP | 93K | $4.4M | +2.1% | 0.894% | 0.00% |
| 12 | MALTESE CAPITAL MANAGEMENT LLC | 86K | $4.1M | +29.4% | 0.827% | 0.81% |
| 13 | VANGUARD FIDUCIARY TRUST CO | 67K | $3.2M | β | 0.651% | 0.00% |
| 14 | Empowered Funds, LLC | 60K | $2.9M | +9.6% | 0.577% | 0.02% |
| 15 | VANGUARD PORTFOLIO MANAGEMENT LLC | 58K | $2.8M | β | 0.562% | 0.00% |
| 16 | MORGAN STANLEY | 51K | $2.5M | +63.9% | 0.496% | 0.00% |
| 17 | CITADEL ADVISORS LLC | 45K | $2.2M | +127.6% | 0.439% | 0.00% |
| 18 | TWO SIGMA INVESTMENTS, LP | 39K | $1.8M | +115.1% | 0.373% | 0.00% |
| 19 | Bank of New York Mellon Corp | 37K | $1.8M | +8.3% | 0.360% | 0.00% |
| 20 | BANK OF AMERICA CORP /DE/ | 33K | $1.6M | +10.0% | 0.321% | 0.00% |
| 21 | STIFEL FINANCIAL CORP | 28K | $1.3M | β | 0.268% | 0.00% |
| 22 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 27K | $1.3M | -11.5% | 0.263% | 0.00% |
| 23 | Fisher Asset Management, LLC | 26K | $1.3M | β | 0.254% | 0.00% |
| 24 | RENAISSANCE TECHNOLOGIES LLC | 25K | $1.2M | +30.9% | 0.237% | 0.00% |
| 25 | Kestra Advisory Services, LLC | 24K | $1.2M | -2.1% | 0.233% | 0.00% |
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 ACNB β a direct measure of their conviction.
Filings activity in ACNB during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new ACNB position in Q1 2026
Institutions that fully closed their ACNB 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 | 105 | +9.4% | 32.98% | 0.11 pp | $196M | 0.3% |
| Q4 2025 | 96 | +13% | 33.09% | +3.47 pp | $197M | +12% |
| Q3 2025 | 85 | +13% | 29.62% | +1.44 pp | $176M | +5.1% |
| Q2 2025 | 75 | 14% | 28.18% | +2.55 pp | $168M | +9.9% |
| Q1 2025 | 87 | +19% | 25.63% | +4.90 pp | $153M | +24% |
| Q4 2024 | 73 | +2.8% | 20.73% | 1.30 pp | $123M | 5.9% |
| Q3 2024 | 71 | +18% | 22.03% | +4.84 pp | $131M | +28% |
| Q2 2024 | 60 | β | 17.19% | β | $102M | 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 ACNB stock.
Based on Q1 2026 13F filings, institutional ownership of ACNB Corporation stands at 33.0%, held across 105 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of ACNB, with approximately 622,577 shares worth $0.03B as of Q1 2026.
Yes β 4 widely-followed marquee investors appear among the top 25 institutional holders of ACNB, including CITADEL ADVISORS LLC, TWO SIGMA INVESTMENTS, LP, Fisher Asset Management, LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for ACNB is 65 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
21 institutions opened new positions in ACNB during Q1 2026, while 12 fully exited. 35 added to existing positions and 46 trimmed.
ACNB institutional ownership fell by 0.11 percentage points quarter-over-quarter, with a net change of +9 holders.
The top 10 institutions account for 73.2% of all reported 13F value in ACNB, and the top 25 account for 90.3%.
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.
ACNB Corporation (ACNB) Institutional Ownership