Ames National Corporation
US ˙ NasdaqCM ˙ US0310011004

SecurityATLO / Ames National Corporation
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership273,040 shares
Latest Disclosed Value $ 7,705,027
Dimensional Fund Advisors Lp reports 2.68% increase in ownership of ATLO / Ames National Corporation

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 273,040 shares of Ames National Corporation (US:ATLO) valued at $7,705,189 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 265,920 shares of Ames National Corporation. This represents a change in shares of 2.68% during the quarter. The current value of the position is $8,139,322 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 AMES NATL COM 031001100 273,040 7,120 2.68 7,705 26.21 0.0003
2026-02-12 2025-12-31 13F AMES NATL COM 031001100 265,920 8,232 3.19 6,106 17.18 0.0013
2025-11-12 2025-09-30 13F AMES NATL COM 031001100 257,688 -2,912 -1.12 5,210 12.26 0.0011
2025-08-12 2025-06-30 13F AMES NATL COM 031001100 260,600 11,693 4.70 4,641 6.44 0.0011
2025-05-13 2025-03-31 13F AMES NATL COM 031001100 248,907 5,484 2.25 4,361 9.03 0.0011
2025-02-13 2024-12-31 13F AMES NATL COM 031001100 243,423 10,182 4.37 3,999 -5.95 0.0010
2024-11-07 2024-09-30 13F AMES NATL COM 031001100 233,241 2,308 1.00 4,252 -10.12 0.0010
2024-08-09 2024-06-30 13F AMES NATL COM 031001100 230,933 -12,879 -5.28 4,731 -3.84 0.0012
2024-05-10 2024-03-31 13F AMES NATL COM 031001100 243,812 -2,535 -1.03 4,920 -6.41 0.0013
2024-02-07 2023-12-31 13F AMES NATL COM 031001100 246,347 -2,840 -1.14 5,257 27.16 0.0015
2023-11-09 2023-09-30 13F AMES NATL COM 031001100 249,187 -17,372 -6.52 4,134 -13.98 0.0014
2023-08-09 2023-06-30 13F AMES NATL COM 031001100 266,559 20,645 8.40 4,806 -6.02 0.0015
2023-05-12 2023-03-31 13F AMES NATL COM 031001100 245,914 18,120 7.95 5,115 102,180.00 0.0017
2023-02-09 2022-12-31 13F AMES NATL COM 031001100 227,794 5,380 2.42 5 -99.90 0.0016
2022-11-10 2022-09-30 13F AMES NATL COM 031001100 222,414 12,423 5.92 4,934 5.93 0.0019
2022-08-12 2022-06-30 13F AMES NATL COM 031001100 209,991 17,700 9.20 4,658 -2.55 0.0017
2022-05-13 2022-03-31 13F AMES NATL COM 031001100 192,291 14,305 8.04 4,780 9.66 0.0015
2022-02-09 2021-12-31 13F AMES NATL COM 031001100 177,986 7,603 4.46 4,359 9.99 0.0013
2021-11-12 2021-09-30 13F AMES NATL COM 031001100 170,383 23,775 16.22 3,963 10.30 0.0013
2021-08-12 2021-06-30 13F AMES NATL COM 031001100 146,608 22,591 18.22 3,593 13.24 0.0011
2021-05-14 2021-03-31 13F AMES NATL COM 031001100 124,017 21,341 20.78 3,173 28.67 0.0010
2021-03-08 2020-12-31 13F/A-2 AMES NATL COM 031001100 102,676 3,602 3.64 2,466 47.40 0.0009
2021-02-11 2020-12-31 13F AMES NATL COM 031001100 102,676 3,602 2,466 890.5881
2020-11-12 2020-09-30 13F AMES NATL COM 031001100 99,074 600 0.61 1,673 -13.94 0.0007
2020-08-13 2020-06-30 13F AMES NATL COM 031001100 98,474 2,270 2.36 1,944 -1.17 0.0009
2020-05-14 2020-03-31 13F AMES NATL COM 031001100 96,204 4,079 4.43 1,967 -23.91 0.0010
2020-02-14 2019-12-31 13F AMES NATL COM 031001100 92,125 -500 -0.54 2,585 -2.45 0.0009
2019-11-12 2019-09-30 13F AMES NATL COM 031001100 92,625 512 0.56 2,650 6.17 0.0010
2019-08-13 2019-06-30 13F AMES NATL COM 031001100 92,113 816 0.89 2,496 -0.24 0.0010
2019-08-12 2019-03-31 13F/A-2 AMES NATL COM 031001100 91,297 3,696 4.22 2,502 12.35 0.0010
2019-05-10 2019-03-31 13F AMES NATL COM 031001100 91,297 3,696 2,502
2019-02-26 2018-12-31 13F/A-1 AMES NATL COM 031001100 87,601 7,634 9.55 2,227 2.20 0.0010
2019-02-13 2018-12-31 13F AMES NATL COM 031001100 87,601 7,634 2,227
2018-11-13 2018-09-30 13F AMES NATL COM 031001100 79,967 23,038 40.47 2,179 24.09 0.0008
2018-08-10 2018-06-30 13F AMES NATL COM 031001100 56,929 19,276 51.19 1,756 69.66 0.0007
2018-05-11 2018-03-31 13F AMES NATL COM 031001100 37,653 14,464 62.37 1,035 60.22 0.0004
2018-02-12 2017-12-31 13F AMES NATL COM 031001100 23,189 16,461 244.66 646 221.39 0.0003
2017-11-13 2017-09-30 13F AMES NATL COM 031001100 6,728 0 0.00 201 -2.43 0.0001
2017-08-11 2017-06-30 13F AMES NATL COM 031001100 6,728 6,728 206 0.0001
2017-05-12 2017-03-31 13F AMES NATL COM 031001100 0 -6,381 -100.00 0 -100.00
2017-02-09 2016-12-31 13F AMES NATL COM 031001100 6,381 6,381 211 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.