AMES NATIONAL CORP (ATLO) Institutional Shareholders
AMES NATIONAL CORP (ATLO) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $106.31M in ATLO holdings during the latest filing period.
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 $22.07M, representing an estimated gain of +9.12% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 65% 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
95
Total Reported Value
$106.31M
Largest Holder
Blackrock, Inc.
Largest Position
$20.23M
Insider Transactions (90d)
5
Latest Filing Quarter
Q2 2026
New Institutional Positions
105
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 | $22,072,609 | +$1,844,501 | +9.12% | |
| Vanguard Capital Management Llc | 0.00% | 387,611 | $11,477,162 | $12,523,711 | +$1,046,549 | +9.12% | |
| Dimensional Fund Advisors Lp | 0.00% | 299,300 | $8,862,464 | $9,670,383 | +$807,919 | +9.12% | |
| Geode Capital Management, Llc | 0.00% | 223,415 | $6,617,088 | $7,218,539 | +$601,451 | +9.09% | |
| State Street Corp | 0.00% | 204,851 | $6,065,638 | $6,618,736 | +$553,098 | +9.12% | |
| American Century Companies Inc | 0.00% | 137,955 | $4,084,848 | $4,457,326 | +$372,478 | +9.12% | |
| Arrowstreet Capital, Limited Partnership | 0.00% | 135,903 | $4,024,088 | $4,391,026 | +$366,938 | +9.12% | |
| Qube Research & Technologies Ltd | 0.00% | 85,233 | $2,523,749 | $2,753,878 | +$230,129 | +9.12% | |
| Marshall Wace, Llp | 0.00% | 83,618 | $2,475,931 | $2,701,698 | +$225,767 | +9.12% | |
| Elizabeth Park Capital Advisors, Ltd. | 1.65% | 80,480 | $2,383,013 | $2,600,309 | +$217,296 | +9.12% | |
| Northern Trust Corp | 0.00% | 74,396 | $2,202,865 | $2,403,735 | +$200,870 | +9.12% | |
| Renaissance Technologies LLC | Jim Simons | 0.00% | 62,184 | $1,841,268 | $2,009,165 | +$167,897 | +9.12% |
| Vanguard Portfolio Management Llc | 0.00% | 60,601 | $1,794,396 | $1,958,018 | +$163,622 | +9.12% | |
| Vanguard Fiduciary Trust Co | 0.00% | 59,174 | $1,752,142 | $1,911,912 | +$159,770 | +9.12% | |
| Lpl Financial Llc | 0.00% | 58,546 | $1,733,552 | $1,891,621 | +$158,069 | +9.12% | |
| Aqr Capital Management Llc | 0.00% | 56,205 | $1,664,243 | $1,815,984 | +$151,741 | +9.12% | |
| Morgan Stanley | 0.00% | 53,461 | $1,582,994 | $1,727,325 | +$144,331 | +9.12% | |
| Ames National Corp | 0.73% | 46,557 | $1,332,115 | $1,504,257 | +$172,142 | +12.92% | |
| O'Shaughnessy Asset Management, Llc | 0.01% | 43,214 | $1,279,567 | $1,396,244 | +$116,677 | +9.12% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 43,074 | $1,275,421 | $1,391,721 | +$116,300 | +9.12% | |
| Goldman Sachs Group Inc | 0.00% | 42,392 | $1,255,227 | $1,369,686 | +$114,459 | +9.12% | |
| Trexquant Investment Lp | 0.01% | 41,416 | $1,226,328 | $1,338,151 | +$111,823 | +9.12% | |
| Citadel Advisors Llc | 0.00% | 38,924 | $1,152,540 | $1,257,634 | +$105,094 | +9.12% | |
| Acadian Asset Management Llc | 0.00% | 36,993 | $1,091,000 | $1,195,244 | +$104,244 | +9.55% | |
| Ritholtz Wealth Management | 0.01% | 32,897 | $974,067 | $1,062,902 | +$88,835 | +9.12% | |
| First Trust Advisors Lp | 0.00% | 32,740 | $969,431 | $1,057,829 | +$88,398 | +9.12% | |
| Channel Wealth Llc | 0.21% | 31,284 | $926,319 | $1,010,786 | +$84,467 | +9.12% | |
| Bank Of New York Mellon Corp | 0.00% | 30,668 | $908,073 | $990,883 | +$82,810 | +9.12% | |
| Rbf Capital, Llc | 0.04% | 30,000 | $888,300 | $969,300 | +$81,000 | +9.12% | |
| Charles Schwab Investment Management Inc | 0.00% | 26,393 | $781,497 | $852,758 | +$71,261 | +9.12% | |
| Arkadios Wealth Advisors | 0.01% | 22,077 | $653,700 | $713,308 | +$59,608 | +9.12% | |
| Newedge Advisors, Llc | 0.00% | 20,034 | $593,207 | $647,299 | +$54,092 | +9.12% | |
| Ifg Advisory, Llc | 0.02% | 18,760 | $555,483 | $606,136 | +$50,653 | +9.12% | |
| Fourthstone Llc | 0.39% | 16,768 | $542,824 | $541,774 | -$1,050 | -0.19% | |
| Bridgeway Capital Management, Llc | 0.01% | 18,111 | $536,267 | $585,166 | +$48,899 | +9.12% | |
| Quadrature Capital Ltd | 0.00% | 16,671 | $493,628 | $538,640 | +$45,012 | +9.12% | |
| State Of Wisconsin Investment Board | 0.00% | 15,632 | $462,864 | $505,070 | +$42,206 | +9.12% | |
| Los Angeles Capital Management Llc | 0.00% | 14,925 | $441,929 | $482,227 | +$40,298 | +9.12% | |
| Nuveen, Llc | 0.00% | 14,751 | $436,777 | $476,605 | +$39,828 | +9.12% | |
| Occudo Quantitative Strategies Lp | 0.02% | 14,558 | $431,062 | $470,369 | +$39,307 | +9.12% | |
| Compound Planning, Inc. | 0.01% | 13,308 | $394,049 | $429,981 | +$35,932 | +9.12% | |
| Xtx Topco Ltd | 0.01% | 13,302 | $393,872 | $429,788 | +$35,916 | +9.12% | |
| Empowered Funds, Llc | 0.00% | 12,103 | $358,370 | $391,048 | +$32,678 | +9.12% | |
| Hillsdale Investment Management Inc. | 0.01% | 11,700 | $346,437 | $378,027 | +$31,590 | +9.12% | |
| Millennium Management Llc | 0.00% | 10,767 | $318,811 | $347,882 | +$29,071 | +9.12% | |
| Invesco Ltd. | 0.00% | 10,013 | $296,486 | $323,520 | +$27,034 | +9.12% | |
| Foster Group, Inc. | 0.01% | 9,931 | $294,046 | $320,871 | +$26,825 | +9.12% | |
| Martingale Asset Management L P | 0.01% | 9,612 | $284,612 | $310,564 | +$25,952 | +9.12% | |
| Bank Of America Corp | 0.00% | 9,435 | $279,371 | $304,845 | +$25,474 | +9.12% | |
| Deutsche Bank Ag\ | 0.00% | 8,751 | $259,117 | $282,745 | +$23,628 | +9.12% |
Frequently asked questions about ATLO
Who owns the most ATLO stock?
The largest holders of ATLO are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for AMES NATIONAL CORP (ATLO).
Is ATLO widely held by superinvestors?
Many widely followed stocks like ATLO appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ATLO is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.