ATLO · Ames National Corp · Holdings

$31.82 -0.48 (-1.49%) At close · Sep 9

Russell 2000 member Rebalance outlook locked

Market Cap

$287.86M

8.86M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Use institutional holdings through the 13F API or MCP →

Quarter:

Holders: 100

Total Value: $107,385,743

Total Shares: 3,626,674

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 100 13F filers · Δ vs Mar 31, 2026

Top Holder

18.8%

−0.2 pts

Top 5

49.6%

−10.9 pts

Top 10

64.0%

−9.3 pts

HHI

689

Broadly held−241

Quarterly Activity

vs Mar 31, 2026

New

Increased

Decreased

Sold Out

Unchanged

Holder count: +9

Institutional value: +6.2%

Shares held: +0.7%

Top Buyers

vs Mar 31, 2026

Institution	Added	Now Holds
Mega AMERICAN CENTURY COMPANIES INC	+92,764	137,955
Mega BlackRock, Inc.	+73,992	683,151
Mega STATE STREET CORP	+53,081	204,851
Mega ARROWSTREET CAPITAL, LIMITED PARTNERSHIP	+35,511	135,903
Large ACADIAN ASSET MANAGEMENT LLC	+35,485	36,993

Top Sellers

vs Mar 31, 2026

Institution	Sold	Now Holds
Small Fourthstone LLC	−666,482	16,768
Mega VANGUARD CAPITAL MANAGEMENT LLC	−12,608	387,611
Mega Vanguard Global Advisers, LLC	−3,264	2,623
Mega GOLDMAN SACHS GROUP INC	−1,950	42,392
Mega BNP PARIBAS ARBITRAGE, SA	−865	1,003

Top New Positions

vs Mar 31, 2026

Institution	Acquired	Value (USD)
Mega Qube Research & Technologies Ltd	85,233	$2,523,749
Mid IFG Advisory, LLC	18,760	$555,483
Large Quadrature Capital Ltd	16,671	$493,628
Large STATE OF WISCONSIN INVESTMENT BOARD	15,632	$462,863
Large LOS ANGELES CAPITAL MANAGEMENT LLC	14,925	$441,929

Top Sold-Out Positions

vs Mar 31, 2026

Institution	Previously Held	Last Value (USD)
Mid SEGALL BRYANT & HAMILL, LLC	39,521	$1,115,282
Micro Clarity Asset Management, Inc.	5,124	$144,599
Large CWM, LLC	2,248	$63,438
Small Root Financial Partners, LLC	10	$282
Large MAI Capital Management	8	$225

Filter: New 15 Increased 54 Reduced 15 Sold out 6 Unchanged 16

Showing 100 of 100

All Common Calls Puts

Compact Export CSV

Holder

Value (USD)

% of 13F

BlackRock, Inc.

$20,228,098

18.84%

683,151

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BLACKROCK FINANCIAL MANAGEMENT INC/DE	3,344	$99,015	0.5%	Sole
BlackRock Investment Management, LLC	30,046	$889,662	4.4%	Sole
BLACKROCK ADVISORS LLC	21,361	$632,499	3.1%	Sole
BlackRock Fund Advisors	388,659	$11,508,192	56.9%	Sole
BlackRock Institutional Trust Company, N.A.	239,125	$7,080,491	35.0%	Sole
Aperio Group, LLC	616	$18,239	0.1%	Sole

VANGUARD CAPITAL MANAGEMENT LLC

$11,477,161

10.69%

387,611

DIMENSIONAL FUND ADVISORS LP

$8,862,271

8.25%

299,300

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Dimensional Fund Advisors Ltd.	610	$18,062	0.2%	Defined
DFA Australia Ltd.	2,711	$80,272	0.9%	Defined
Dimensional Ireland Ltd	13,878	$410,927	4.6%	Defined
Held directly	282,101	$8,353,010	94.3%	Sole

GEODE CAPITAL MANAGEMENT, LLC

$6,615,317

6.16%

223,415

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GEODE CAPITAL MANAGEMENT TRUST COMPANY, LLC	32,904	$974,287	14.7%	Defined
Held directly	190,511	$5,641,030	85.3%	Defined

STATE STREET CORP

$6,065,638

5.65%

204,851

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
STATE STREET GLOBAL ADVISORS EUROPE LIMITED joint	204,851	$6,065,638	100.0%	Defined

AMERICAN CENTURY COMPANIES INC

$4,084,847

3.80%

137,955

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
AMERICAN CENTURY INVESTMENT MANAGEMENT INC	137,955	$4,084,847	100.0%	Defined

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

$4,024,087

3.75%

135,903

Qube Research & Technologies Ltd

$2,523,749

2.35%

85,233

MARSHALL WACE, LLP

$2,475,928

2.31%

83,618

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Marshall Wace North America L.P. joint	83,618	$2,475,928	100.0%	Other

Elizabeth Park Capital Advisors, Ltd.

$2,383,012

2.22%

80,480

NORTHERN TRUST CORP

$2,202,864

2.05%

74,396

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
NORTHERN TRUST CO joint	72,976	$2,160,818	98.1%	Defined
DWS INVESTMENT MANAGEMENT AMERICAS, INC joint	1,420	$42,046	1.9%	Other

RENAISSANCE TECHNOLOGIES LLC

$1,841,268

1.71%

62,184

VANGUARD PORTFOLIO MANAGEMENT LLC

$1,794,395

1.67%

60,601

VANGUARD FIDUCIARY TRUST CO

$1,752,142

1.63%

59,174

LPL Financial LLC

$1,733,547

1.61%

58,546

AQR CAPITAL MANAGEMENT LLC

$1,664,227

1.55%

56,205

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RF&L WEALTH MANAGEMENT, LLC	3	$88	0.0%	Other
Prism Planning Partners LLC	33	$977	0.1%	Other
Compound Planning, Inc.	4	$118	0.0%	Other
Arax Advisory Partners	638	$18,891	1.1%	Other
HALBERT HARGROVE GLOBAL ADVISORS, LLC	181	$5,359	0.3%	Other
Stokes Family Office, LLC	102	$3,020	0.2%	Other
Held directly	55,244	$1,635,774	98.3%	Defined

MORGAN STANLEY

$1,582,977

1.47%

53,461

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
MORGAN STANLEY & CO INTERNATIONAL PLC	16	$473	0.0%	Defined
MORGAN STANLEY & CO. LLC	2,702	$80,006	5.1%	Defined
MORGAN STANLEY CAPITAL SERVICES, LLC	7,447	$220,505	13.9%	Defined
MORGAN STANLEY SMITH BARNEY LLC	25,675	$760,236	48.0%	Defined
PARAMETRIC PORTFOLIO ASSOCIATES LLC	17,621	$521,757	33.0%	Defined

AMES NATIONAL CORP

$1,378,552

1.28%

46,557

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
First National Bank, Ames, Iowa	7,088	$209,875	15.2%	Defined
Held directly	39,469	$1,168,677	84.8%	Defined

O'SHAUGHNESSY ASSET MANAGEMENT, LLC

$1,279,566

1.19%

43,214

Connor, Clark & Lunn Investment Management Ltd.

$1,275,421

1.19%

43,074

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Manager 1	43,074	$1,275,421	100.0%	Sole

GOLDMAN SACHS GROUP INC

$1,255,226

1.17%

42,392

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
GOLDMAN SACHS & CO. LLC	34,686	$1,027,052	81.8%	Defined
GOLDMAN SACHS ASSET MANAGEMENT, L.P.	7,706	$228,174	18.2%	Defined

Trexquant Investment LP

$1,226,327

1.14%

41,416

CITADEL ADVISORS LLC

$1,152,538

1.07%

38,924

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citadel Securities GP LLC	27,406	$811,491	70.4%	Defined
Held directly	11,518	$341,047	29.6%	Defined

ACADIAN ASSET MANAGEMENT LLC

$1,095,362

1.02%

36,993

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Acadian Inc	36,993	$1,095,362	100.0%	Defined

RITHOLTZ WEALTH MANAGEMENT

$974,080

0.91%

32,897

FIRST TRUST ADVISORS LP

$969,431

0.90%

32,740

CHANNEL WEALTH LLC

$926,319

0.86%

31,284

Bank of New York Mellon Corp

$908,078

0.85%

30,668

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Investments Corporation	8,743	$258,880	28.5%	Defined
The Bank of New York Mellon	14,459	$428,130	47.1%	Defined
Newton Investment Management North America, LLC	7,464	$221,009	24.3%	Defined
Held directly	2	$59	0.0%	Defined

NORTHWESTERN MUTUAL WEALTH MANAGEMENT CO

$907,250

0.84%

30,640

RBF Capital, LLC

$888,300

0.83%

30,000

CHARLES SCHWAB INVESTMENT MANAGEMENT INC

$781,496

0.73%

26,393

Arkadios Wealth Advisors

$653,698

0.61%

22,077

NewEdge Advisors, LLC

$593,206

0.55%

20,034

IFG Advisory, LLC

$555,483

0.52%

18,760

BRIDGEWAY CAPITAL MANAGEMENT, LLC

$536,266

0.50%

18,111

Fourthstone LLC

$496,500

0.46%

16,768

Quadrature Capital Ltd

$493,628

0.46%

16,671

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Quadrature US Inc.	16,671	$493,628	100.0%	Other

STATE OF WISCONSIN INVESTMENT BOARD

$462,863

0.43%

15,632

LOS ANGELES CAPITAL MANAGEMENT LLC

$441,929

0.41%

14,925

Nuveen, LLC

$436,776

0.41%

14,751

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Nuveen Asset Management, LLC joint	4,354	$128,921	29.5%	Defined
TEACHERS ADVISORS, LLC joint	10,397	$307,855	70.5%	Defined

OCCUDO QUANTITATIVE STRATEGIES LP

$431,062

0.40%

14,558

Compound Planning, Inc.

$394,049

0.37%

13,308

XTX Topco Ltd

$393,872

0.37%

13,302

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
XTX EXECUTION SERVICES LLC joint	13,302	$393,872	100.0%	Defined

Empowered Funds, LLC

$358,369

0.33%

12,103

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Bridgeway Capital Management, LLC	12,103	$358,369	100.0%	Other

Hillsdale Investment Management Inc.

$346,437

0.32%

11,700

MILLENNIUM MANAGEMENT LLC

$318,810

0.30%

10,767

Invesco Ltd.

$296,483

0.28%

10,013

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Invesco Advisers, Inc. joint	1,214	$35,946	12.1%	Defined
Invesco Trust Co joint	3,567	$105,618	35.6%	Defined
Invesco Capital Management LLC	5,232	$154,919	52.3%	Defined

Foster Group, Inc.

$294,056

0.27%

9,931

MARTINGALE ASSET MANAGEMENT L P

$284,611

0.27%

9,612

BANK OF AMERICA CORP /DE/

$279,370

0.26%

9,435

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BANK OF AMERICA NA	9,435	$279,370	100.0%	Defined

DEUTSCHE BANK AG\

$259,117

0.24%

8,751

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
DWS Investments UK Ltd	8,751	$259,117	100.0%	Defined

RHUMBLINE ADVISERS

$251,685

0.23%

8,500

Larry Mathis Financial Planning, LLC

$249,997

0.23%

8,443

WELLS FARGO & COMPANY/MN

$223,258

0.21%

7,540

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
WELLS FARGO BANK N A	7,513	$222,459	99.6%	Defined
WELLS FARGO CLEARING SERVICES, LLC	2	$59	0.0%	Defined
WELLS FARGO INVESTMENT INSTITUTE, INC.	25	$740	0.3%	Defined

JANE STREET GROUP, LLC

$222,075

0.21%

7,500

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Jane Street Capital, LLC	7,500	$222,075	100.0%	Defined

Russell Investments Group, Ltd.

$202,087

0.19%

6,825

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Russell Investment Management, LLC	6,825	$202,087	100.0%	Defined

UBS Group AG

$172,122

0.16%

5,813

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Financial Services Inc	2,532	$74,972	43.6%	Defined
UBS AG	3,281	$97,150	56.4%	Defined

JONES FINANCIAL COMPANIES LLLP

$163,506

0.15%

5,522

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Edward D. Jones & Co., L.P.	5,522	$163,506	100.0%	Sole

MetLife Investment Management, LLC

$148,760

0.14%

5,024

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
METLIFE INC	5,024	$148,760	100.0%	Defined

NEW YORK STATE COMMON RETIREMENT FUND

$132,445

0.12%

4,473

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.

$122,318

0.11%

4,131

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Global X Management CO LLC joint	4,131	$122,318	100.0%	Defined

CITIGROUP INC

$122,169

0.11%

4,126

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Citigroup Financial Products Inc. joint	4,126	$122,169	100.0%	Defined

JPMORGAN CHASE & CO

$112,310

0.10%

3,793

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
JPMorgan Chase Bank, N.A.	3,719	$110,119	98.0%	Defined
J.P. Morgan Investment Management Inc.	5	$148	0.1%	Defined
J.P. Morgan Securities plc	69	$2,043	1.8%	Defined

Smartleaf Asset Management LLC

$98,601

0.09%

3,330

Police & Firemen's Retirement System of New Jersey

$95,581

0.09%

3,228

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Mellon Capital	3,228	$95,581	100.0%	Defined

Vanguard Global Advisers, LLC

$77,667

0.07%

2,623

FMR LLC

$35,117

0.03%

1,186

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Fidelity Management & Research Co LLC	1,186	$35,117	100.0%	Defined

BARCLAYS PLC

$34,553

0.03%

1,167

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BARCLAYS BANK PLC	995	$29,461	85.3%	Defined
BARCLAYS CAPITAL INC.	172	$5,092	14.7%	Defined

BNP PARIBAS ARBITRAGE, SA

$29,698

0.03%

1,003

PNC FINANCIAL SERVICES GROUP, INC.

$28,277

0.03%

955

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
PNC Bank, National Association	955	$28,277	100.0%	Defined

ROYAL BANK OF CANADA

$26,766

0.02%

904

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
RBC CMA LTD.	283	$8,379	31.3%	Defined
RBC Capital Markets, LLC	621	$18,387	68.7%	Defined

West Financial Advisors, LLC

$23,806

0.02%

804

Legal & General Group Plc

$23,539

0.02%

795

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Legal & General Investment Management America Inc	795	$23,539	100.0%	Defined

Tower Research Capital LLC (TRC)

$21,141

0.02%

714

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Latour Trading LLC (Latour)	714	$21,141	100.0%	Defined

Ameritas Investment Partners, Inc.

$21,052

0.02%

711

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
EATON VANCE MANAGEMENT	711	$21,052	100.0%	Other

Arax Advisory Partners

$19,335

0.02%

653

UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC

$18,032

0.02%

609

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
UBS Group AG	609	$18,032	100.0%	Defined

GAMMA Investing LLC

$10,008

0.01%

338

City State Bank

$7,106

0.01%

240

OSAIC HOLDINGS, INC.

$6,040

0.01%

204

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
OSAIC WEALTH, INC.	204	$6,040	100.0%	Defined

Sterling Capital Management LLC

$5,359

0.00%

181

Allworth Financial LP

$3,938

0.00%

133

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM

$3,671

0.00%

124

EverSource Wealth Advisors, LLC

$3,018

0.00%

102

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
BMSS Wesson Wealth Solutions, LLC	7	$206	6.8%	Sole
Held directly	95	$2,812	93.2%	Sole

Optiver Holding B.V.

$2,783

0.00%

This filing is a combination report: the position is filed across the managers below.

Manager	Shares	Value (USD)	% of position	Discretion
Optiver VOF	94	$2,783	100.0%	Defined

Global Retirement Partners, LLC

$1,835

0.00%

Essential Partners LLC

$1,450

0.00%

MassMutual Private Wealth & Trust, FSB

$1,450

0.00%

NISA INVESTMENT ADVISORS, LLC

$1,302

0.00%

IFP Advisors, Inc

$1,302

0.00%

True Wealth Design, LLC

$1,154

0.00%

ROTHSCHILD INVESTMENT LLC

$1,036

0.00%

Farther Finance Advisors, LLC

$532

0.00%

Physician Wealth Advisors, Inc.

$503

0.00%

Basecamp Wealth Advisors LLC

$473

0.00%

Fortitude Family Office, LLC

$444

0.00%

Covestor Ltd

$177

0.00%

SJS Investment Consulting Inc.

$118

0.00%

Clearstead Advisors, LLC

$59

0.00%

Keating Financial Advisory Services, Inc.

$29

0.00%

Key facts CIK 1132651 CUSIP 031001100 13F (30d) 65 filings 65 filers Visit website