ACNB Corporation
US ˙ NasdaqCM ˙ US0008681092

SecurityACNB / ACNB Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership334,844 shares
Latest Disclosed Value $ 16,028,972
Dimensional Fund Advisors Lp reports 4.62% increase in ownership of ACNB / ACNB Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 334,844 shares of ACNB Corporation (US:ACNB) valued at $16,028,982 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 320,055 shares of ACNB Corporation. This represents a change in shares of 4.62% during the quarter. The current value of the position is $18,376,239 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-07 2026-03-31 13F ACNB COM 000868109 334,844 14,789 4.62 16,029 3.58 0.0007
2026-02-12 2025-12-31 13F ACNB COM 000868109 320,055 8,777 2.82 15,475 12.88 0.0032
2025-11-12 2025-09-30 13F ACNB COM 000868109 311,278 8,157 2.69 13,708 5.56 0.0029
2025-08-12 2025-06-30 13F ACNB COM 000868109 303,121 16,448 5.74 12,986 10.07 0.0030
2025-05-13 2025-03-31 13F ACNB COM 000868109 286,673 13,004 4.75 11,799 8.25 0.0029
2025-02-13 2024-12-31 13F ACNB COM 000868109 273,669 10,796 4.11 10,900 -5.05 0.0026
2024-11-07 2024-09-30 13F ACNB COM 000868109 262,873 9,567 3.78 11,479 24.96 0.0028
2024-08-09 2024-06-30 13F ACNB COM 000868109 253,306 5,119 2.06 9,186 -1.55 0.0024
2024-05-10 2024-03-31 13F ACNB COM 000868109 248,187 2,709 1.10 9,332 -15.08 0.0025
2024-02-07 2023-12-31 13F ACNB COM 000868109 245,478 8,421 3.55 10,988 46.64 0.0032
2023-11-09 2023-09-30 13F ACNB COM 000868109 237,057 11,817 5.25 7,494 0.29 0.0025
2023-08-09 2023-06-30 13F ACNB COM 000868109 225,240 1,881 0.84 7,471 2.76 0.0024
2023-05-12 2023-03-31 13F ACNB COM 000868109 223,359 5,662 2.60 7,270 90,775.00 0.0024
2023-02-09 2022-12-31 13F ACNB COM 000868109 217,697 6,866 3.26 9 -99.87 0.0026
2022-11-10 2022-09-30 13F ACNB COM 000868109 210,831 18,646 9.70 6,334 10.99 0.0024
2022-08-12 2022-06-30 13F ACNB COM 000868109 192,185 20,029 11.63 5,707 -5.15 0.0020
2022-05-13 2022-03-31 13F ACNB COM 000868109 172,156 9,196 5.64 6,017 18.05 0.0019
2022-02-09 2021-12-31 13F ACNB COM 000868109 162,960 4,177 2.63 5,097 14.64 0.0015
2021-11-12 2021-09-30 13F ACNB COM 000868109 158,783 -2,634 -1.63 4,446 -1.31 0.0014
2021-08-12 2021-06-30 13F ACNB COM 000868109 161,417 6,688 4.32 4,505 -0.64 0.0014
2021-05-14 2021-03-31 13F ACNB COM 000868109 154,729 16,094 11.61 4,534 30.81 0.0015
2021-03-08 2020-12-31 13F/A-2 ACNB COM 000868109 138,635 1,649 1.20 3,466 21.66 0.0013
2021-02-11 2020-12-31 13F ACNB COM 000868109 138,635 1,649 3,466 1,251.7350
2020-11-12 2020-09-30 13F ACNB COM 000868109 136,986 3,976 2.99 2,849 -18.18 0.0012
2020-08-13 2020-06-30 13F ACNB COM 000868109 133,010 16,080 13.75 3,482 -0.71 0.0015
2020-05-14 2020-03-31 13F ACNB COM 000868109 116,930 6,907 6.28 3,507 -15.72 0.0018
2020-02-14 2019-12-31 13F ACNB COM 000868109 110,023 4,167 3.94 4,161 14.60 0.0015
2019-11-12 2019-09-30 13F ACNB COM 000868109 105,856 2,147 2.07 3,631 -11.48 0.0014
2019-08-13 2019-06-30 13F ACNB COM 000868109 103,709 5,013 5.08 4,102 12.35 0.0016
2019-08-12 2019-03-31 13F/A-2 ACNB COM 000868109 98,696 15,342 18.41 3,651 11.62 0.0015
2019-05-10 2019-03-31 13F ACNB COM 000868109 98,696 15,342 3,651
2019-02-26 2018-12-31 13F/A-1 ACNB COM 000868109 83,354 8,628 11.55 3,271 17.66 0.0015
2019-02-13 2018-12-31 13F ACNB COM 000868109 83,354 8,628 3,271
2018-11-13 2018-09-30 13F ACNB COM 000868109 74,726 9,935 15.33 2,780 26.02 0.0011
2018-08-10 2018-06-30 13F ACNB COM 000868109 64,791 16,197 33.33 2,206 55.24 0.0009
2018-05-11 2018-03-31 13F ACNB COM 000868109 48,594 10,408 27.26 1,421 25.86 0.0006
2018-02-12 2017-12-31 13F ACNB COM 000868109 38,186 5,985 18.59 1,129 26.57 0.0005
2017-11-13 2017-09-30 13F ACNB COM 000868109 32,201 9,704 43.13 892 30.03 0.0004
2017-08-11 2017-06-30 13F ACNB COM 000868109 22,497 6,635 41.83 686 49.78 0.0003
2017-05-12 2017-03-31 13F ACNB COM 000868109 15,862 3,205 25.32 458 15.66 0.0002
2017-02-09 2016-12-31 13F ACNB COM 000868109 12,657 3,066 31.97 396 55.29 0.0002
2016-11-10 2016-09-30 13F ACNB COM 000868109 9,591 9,591 255 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.