ATLO Institutional Ownership & Shareholders
AMES NATIONAL CORP (ATLO) is currently held by 99 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $106.59M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ATLO tracked by InsiderSet, reporting ownership valued at approximately $20.23M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $22.89M, representing an estimated gain of +13.17% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 64% of the total disclosed ATLO value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Vanguard Capital Management Llc, Dimensional Fund Advisors Lp, and several other long-term asset managers with concentrated positions in AMES NATIONAL CORP (ATLO).
This page ranks the largest institutional ATLO shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
99
Total Reported Value
$106.59M
Largest Holder
Blackrock, Inc.
Largest Position
$20.23M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
110
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 683,151 | $20,228,108 | $22,892,390 | +$2,664,282 | +13.17% | |
| Vanguard Capital Management Llc | 0.00% | 387,611 | $11,477,162 | $12,988,845 | +$1,511,683 | +13.17% | |
| Dimensional Fund Advisors Lp | 0.00% | 299,300 | $8,862,464 | $10,029,543 | +$1,167,079 | +13.17% | |
| Geode Capital Management, Llc | 0.00% | 223,415 | $6,617,088 | $7,486,637 | +$869,549 | +13.14% | |
| State Street Corp | 0.00% | 204,851 | $6,065,638 | $6,864,557 | +$798,919 | +13.17% | |
| American Century Companies Inc | 0.00% | 137,955 | $4,084,848 | $4,622,872 | +$538,024 | +13.17% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 135,903 | $4,024,088 | $4,554,110 | +$530,022 | +13.17% | |
| Qube Research & Technologies Ltd | 0.00% | 85,233 | $2,523,749 | $2,856,158 | +$332,409 | +13.17% | |
| Marshall Wace, Llp | 0.00% | 83,618 | $2,475,931 | $2,802,039 | +$326,108 | +13.17% | |
| Elizabeth Park Capital Advisors, Ltd. | 1.65% | 80,480 | $2,383,013 | $2,696,885 | +$313,872 | +13.17% | |
| Northern Trust Corp | 0.00% | 74,396 | $2,202,865 | $2,493,010 | +$290,145 | +13.17% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 62,184 | $1,841,268 | $2,083,786 | +$242,518 | +13.17% |
| Vanguard Portfolio Management Llc | 0.00% | 60,601 | $1,794,396 | $2,030,740 | +$236,344 | +13.17% | |
| Vanguard Fiduciary Trust Co | 0.00% | 59,174 | $1,752,142 | $1,982,921 | +$230,779 | +13.17% | |
| Lpl Financial Llc | 0.00% | 58,546 | $1,733,552 | $1,961,876 | +$228,324 | +13.17% | |
| Aqr Capital Management Llc | 0.00% | 56,205 | $1,664,243 | $1,883,430 | +$219,187 | +13.17% | |
| Morgan Stanley | 0.00% | 53,461 | $1,582,994 | $1,791,478 | +$208,484 | +13.17% | |
| Ames National Corp | 0.73% | 46,557 | $1,332,115 | $1,560,125 | +$228,010 | +17.12% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 43,214 | $1,279,567 | $1,448,101 | +$168,534 | +13.17% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 43,074 | $1,275,421 | $1,443,410 | +$167,989 | +13.17% | |
| Goldman Sachs Group Inc | 0.00% | 42,392 | $1,255,227 | $1,420,556 | +$165,329 | +13.17% | |
| Trexquant Investment Lp | 0.01% | 41,416 | $1,226,328 | $1,387,850 | +$161,522 | +13.17% | |
| Citadel Advisors Llc | 0.00% | 38,924 | $1,152,540 | $1,304,343 | +$151,803 | +13.17% | |
| Acadian Asset Management Llc | 0.00% | 36,993 | $1,091,000 | $1,239,635 | +$148,635 | +13.62% | |
| Ritholtz Wealth Management | 0.01% | 32,897 | $974,067 | $1,102,378 | +$128,311 | +13.17% | |
| First Trust Advisors Lp | 0.00% | 32,740 | $969,431 | $1,097,117 | +$127,686 | +13.17% | |
| Channel Wealth Llc | 0.21% | 31,284 | $926,319 | $1,048,327 | +$122,008 | +13.17% | |
| Bank Of New York Mellon Corp | 0.00% | 30,668 | $908,073 | $1,027,685 | +$119,612 | +13.17% | |
| Rbf Capital, Llc | 0.04% | 30,000 | $888,300 | $1,005,300 | +$117,000 | +13.17% | |
| Charles Schwab Investment Management Inc | 0.00% | 26,393 | $781,497 | $884,429 | +$102,932 | +13.17% | |
| Arkadios Wealth Advisors | 0.01% | 22,077 | $653,700 | $739,800 | +$86,100 | +13.17% | |
| Newedge Advisors, Llc | 0.00% | 20,034 | $593,207 | $671,339 | +$78,132 | +13.17% | |
| Ifg Advisory, Llc | 0.02% | 18,760 | $555,483 | $628,648 | +$73,165 | +13.17% | |
| Fourthstone Llc | 0.39% | 16,768 | $542,824 | $561,896 | +$19,072 | +3.51% | |
| Bridgeway Capital Management, Llc | 0.01% | 18,111 | $536,267 | $606,900 | +$70,633 | +13.17% | |
| Quadrature Capital Ltd | 0.00% | 16,671 | $493,628 | $558,645 | +$65,017 | +13.17% | |
| State Of Wisconsin Investment Board | 0.00% | 15,632 | $462,864 | $523,828 | +$60,964 | +13.17% | |
| Los Angeles Capital Management Llc | 0.00% | 14,925 | $441,929 | $500,137 | +$58,208 | +13.17% | |
| Nuveen, Llc | 0.00% | 14,751 | $436,777 | $494,306 | +$57,529 | +13.17% | |
| Occudo Quantitative Strategies Lp | 0.02% | 14,558 | $431,062 | $487,839 | +$56,777 | +13.17% | |
| Compound Planning, Inc. | 0.01% | 13,308 | $394,049 | $445,951 | +$51,902 | +13.17% | |
| Xtx Topco Ltd | 0.01% | 13,302 | $393,872 | $445,750 | +$51,878 | +13.17% | |
| Empowered Funds, Llc | 0.00% | 12,103 | $358,370 | $405,572 | +$47,202 | +13.17% | |
| Hillsdale Investment Management Inc. | 0.01% | 11,700 | $346,437 | $392,067 | +$45,630 | +13.17% | |
| Millennium Management Llc | 0.00% | 10,767 | $318,811 | $360,802 | +$41,991 | +13.17% | |
| Foster Group, Inc. | 0.01% | 10,004 | $313,913 | $335,234 | +$21,321 | +6.79% | |
| Invesco Ltd. | 0.00% | 10,013 | $296,486 | $335,536 | +$39,050 | +13.17% | |
| Martingale Asset Management L P | 0.01% | 9,612 | $284,612 | $322,098 | +$37,486 | +13.17% | |
| Bank Of America Corp | 0.00% | 9,435 | $279,371 | $316,167 | +$36,796 | +13.17% | |
| Larry Mathis Financial Planning, Llc | 0.23% | 8,443 | $264,941 | $282,925 | +$17,984 | +6.79% |
Frequently asked questions about ATLO
Who are the largest institutional holders of ATLO?
The largest institutional holders of ATLO reported in the latest SEC Form 13F filings include Blackrock, Inc., Vanguard Capital Management Llc, Dimensional Fund Advisors Lp, Geode Capital Management, Llc, and State Street Corp. InsiderSet ranks institutional holders by their latest reported ATLO position.
What is ATLO institutional ownership?
This page tracks ATLO positions reported by institutional investment managers through SEC Form 13F. AMES NATIONAL CORP (ATLO) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ATLO?
InsiderSet currently tracks 99 institutional managers reporting ATLO holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ATLO shareholders.
How much ATLO stock do institutions own?
Institutional investment managers disclosed approximately $106.59M in ATLO holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ATLO institutional ownership last updated?
The latest ATLO institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ATLO holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ATLO position after the reporting date.
Are institutions buying or selling ATLO?
Institutional buying and selling can be analyzed by comparing ATLO positions across consecutive 13F reporting periods. InsiderSet's ATLO Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ATLO ownership changes.
How has ATLO institutional ownership changed over time?
InsiderSet tracks ATLO institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.