Earnest Partners reports 7.3% stake in GATX (NYSE: GATX)

Rhea-AI Filing Summary

Earnest Partners, LLC reports beneficial ownership of 2,606,241 shares of GATX Corp common stock, equal to 7.3% of the class as of 03/31/2026. The filing states Earnest files as an investment adviser under Rule 13d-1(b)(1)(ii)(E). It discloses sole voting power over 1,626,302 shares, shared voting power over 409,171 shares, and sole dispositive power over all 2,606,241 shares. The amendment is signed by the Chief Compliance Officer on 05/12/2026.

Insights

Institutional Ownership Analyst

Large activist-style stake disclosed by an investment adviser.

The filing shows 2,606,241 shares (7.3%) beneficially owned by Earnest Partners as of 03/31/2026. The report classifies Earnest as an investment adviser under Rule 13d-1(b)(1)(ii)(E), indicating passive reporting status rather than an active Schedule 13D control filing.

The disclosure lists voting and dispositive power breakdowns: 1,626,302 sole votes, 409,171 shared votes, and 2,606,241 sole dispositive power. Subsequent filings may clarify any change in intent or plans regarding the position.

Key Figures

Filing type: Schedule 13G/A Beneficially owned: 2,606,241 shares Percent of class: 7.3% +4 more

7 metrics

Filing type Schedule 13G/A Amendment reporting beneficial ownership

Beneficially owned 2,606,241 shares as of 03/31/2026

Percent of class 7.3% reported percent of outstanding common stock

Sole voting power 1,626,302 shares number of shares with sole voting power

Shared voting power 409,171 shares number of shares with shared voting power

Sole dispositive power 2,606,241 shares number of shares with sole dispositive power

Signature date 05/12/2026 Amendment signed by Chief Compliance Officer

Key Terms

Schedule 13G/A, beneficially owned, dispositive power, Rule 13d-1(b)(1)(ii)(E)

4 terms

Schedule 13G/A regulatory

"Amendment No. 8 ) GATX CORP Common Stock 361448103 03/31/2026"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

beneficially owned financial

"Amount beneficially owned: 2,606,241.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

dispositive power regulatory

"Sole power to dispose or to direct the disposition of: 2,606,241.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Rule 13d-1(b)(1)(ii)(E) regulatory

"EARNEST Partners, LLC is filing as an investment adviser in accordance with 240.13d-1(b)(1)(ii)(E)"

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Accepted by SEC EDGAR 05/15/2026 - 03:20 PM Learn about SEC filing dates

FAQ

What stake does Earnest Partners report in GATX (GATX)?

Earnest Partners reports beneficial ownership of 2,606,241 shares, representing 7.3% of GATX common stock as of 03/31/2026. The filing is an amended Schedule 13G filed by the adviser.

Does Earnest Partners have voting control over its GATX shares?

Yes. The filing shows sole voting power for 1,626,302 shares and shared voting power for 409,171 shares, per the Schedule 13G/A disclosure.

What does filing as an investment adviser under Rule 13d-1(b)(1)(ii)(E) mean for GATX?

It indicates the holder is reporting in an advisory capacity rather than seeking control; Earnest is identifying its position under the passive Schedule 13G framework, per the filing language.

What is the dispositive power Earnest reports for GATX shares?

The amendment states Earnest has sole dispositive power over 2,606,241 shares, meaning it can direct the sale or disposition of those shares per the filing.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 8)

GATX CORP

(Name of Issuer)

Common Stock

(Title of Class of Securities)

361448103

(CUSIP Number)

03/31/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 361448103

1

Names of Reporting Persons

EARNEST PARTNERS LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,626,302.00
6	Shared Voting Power 409,171.00
7	Sole Dispositive Power 2,606,241.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,606,241.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

7.3 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: GATX CORP
(b)	Address of issuer's principal executive offices: 233 SOUTH WACKER DRIVE, CHICAGO, ILLINOIS, 60606-7147.
Item 2.
(a)	Name of person filing: EARNEST Partners, LLC
(b)	Address or principal business office or, if none, residence: 1180 Peachtree Street NE, Suite 2300, Atlanta, Georgia 30309
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 361448103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2,606,241.00
(b)	Percent of class: 7.3%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,626,302.00
	(ii) Shared power to vote or to direct the vote: 409,171.00
	(iii) Sole power to dispose or to direct the disposition of: 2,606,241.00
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. EARNEST Partners, LLC is filing as an investment adviser in accordance with 240.13d-1(b)(1)(ii)(E). No client interest relates to more than five percent of the class.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

EARNEST PARTNERS LLC

Signature:	James M. Wilson
Name/Title:	Chief Compliance Officer
Date:	05/12/2026