Gabelli group reports 5.5% GATX (NYSE: GATX) ownership stake

Rhea-AI Filing Summary

Gabelli-affiliated investment entities filed an amended Schedule 13D reporting beneficial ownership of 1,953,448 GATX Corp common shares, or 5.50% of the 35,523,634 shares outstanding as of February 26, 2026.

The holdings are spread mainly across Gabelli Funds, LLC with 844,950 shares and GAMCO Asset Management Inc. with 1,100,598 shares, with smaller positions at related entities and Mario Gabelli personally. The group uses the long-form Schedule 13D because they may regularly communicate with GATX management and want those interactions to remain compliant with Exchange Act reporting rules. Recent activity shows numerous open-market transactions, largely sales by Gabelli funds and GAMCO during February–March 2026 at prices generally between about $168 and $198 per share.

Insights

Equity ownership and activism analyst

Gabelli entities report a 5.5% GATX stake with ongoing trading and possible management dialogue.

Gabelli Funds, LLC, GAMCO Asset Management and affiliated entities collectively report beneficial ownership of 1,953,448 GATX shares, equal to 5.50% of the 35,523,634 shares outstanding as of February 26, 2026. The stake reflects a meaningful but not controlling position.

The filing explains they choose the long-form Schedule 13D because they may regularly communicate with GATX’s management. That language signals an engaged, research-driven shareholder rather than a purely passive holder, though no specific plans or proposals are described in the excerpt.

Item 5 lists extensive recent trading, mainly open‑market sales by Gabelli funds and GAMCO during February–March 2026, at prices mostly between about $168 and $198 per share. Despite this selling activity, the group still reports aggregate ownership above the 5% disclosure threshold, suggesting continued interest in the position while actively managing size.

Key Figures

Aggregate GATX shares owned: 1,953,448 shares Ownership percentage: 5.50% of class Shares outstanding: 35,523,634 shares +5 more

8 metrics

Aggregate GATX shares owned 1,953,448 shares Beneficial ownership reported by Gabelli-related entities

Ownership percentage 5.50% of class Based on 35,523,634 GATX shares outstanding as of February 26, 2026

Shares outstanding 35,523,634 shares GATX common stock outstanding as of February 26, 2026

Gabelli Funds holding 844,950 shares (2.38%) Beneficial ownership attributed to Gabelli Funds, LLC

GAMCO holding 1,100,598 shares (3.10%) Beneficial ownership attributed to GAMCO Asset Management Inc.

Largest reported sale price $198.9155 per share GAMCO sale on 2/23/2026

Recent sale example price $171.9900 per share GAMCO sale of 34,000 shares on 3/31/2026

Gabelli Utilities Fund sale 4,000 shares at $190.5750 Sale on 2/11/2026

Key Terms

beneficially own, Schedule 13D, sole voting power, investment adviser, +2 more

6 terms

beneficially own financial

"The Reporting Persons beneficially own those Securities as follows: Funds 844,950 shares 2.38%, GAMCO 1,100,598 shares 3.10%"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

Schedule 13D regulatory

"file the long form pursuant to Section 13d-1 of the Securities Exchange Act of 1934 (the "Act") even though they may be technically eligible to file the short form Schedule G."

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

sole voting power financial

"Each of the Reporting Persons and Covered Persons has the sole power to vote or direct the vote and sole power to dispose"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

investment adviser financial

"GAMCO, a wholly-owned subsidiary of GBL, is an investment adviser registered under the Investment Advisers Act of 1940"

An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.

Proxy Voting Committee financial

"the Proxy Voting Committee of each Fund shall respectively vote that Funds shares"

beneficial ownership threshold financial

"representing 5.50% of the 35,523,634 shares outstanding as reported by the Issuer"

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 14)

GATX CORP

(Name of Issuer)

Common Stock

(Title of Class of Securities)

361448103

(CUSIP Number)

DAVID GOLDMAN
191 MASON STREET,
GREENWICH, CT, 06830
914-921-5000

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

03/31/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

GAMCO INVESTORS, INC. ET AL

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

WC

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

0.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.0 %

14

Type of Reporting Person (See Instructions)

CO, HC

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

GABELLI FUNDS LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 844,950.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 844,950.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

844,950.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

2.4 %

14

Type of Reporting Person (See Instructions)

CO, IA

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

GAMCO Asset Management Inc.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,056,998.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 1,100,598.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

1,100,598.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

3.1 %

14

Type of Reporting Person (See Instructions)

CO, IA

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

GABELLI FOUNDATION, INC.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

WC

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NEVADA

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,500.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 1,500.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

1,500.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.0 %

14

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

MJG ASSOCIATES, INC.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

CONNECTICUT

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 4,000.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 4,000.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

4,000.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.0 %

14

Type of Reporting Person (See Instructions)

CO

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

GGCP, INC.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

WC

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

WYOMING

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,000.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 1,000.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

1,000.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.0 %

14

Type of Reporting Person (See Instructions)

CO, HC

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

Associated Capital Group, Inc.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

WC

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 100.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 100.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

100.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.0 %

14

Type of Reporting Person (See Instructions)

CO, HC

SCHEDULE 13D

CUSIP Number(s): 361448103

1

Name of reporting person

GABELLI MARIO J

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,300.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 1,300.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

1,300.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0.0 %

14

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock
(b)	Name of Issuer: GATX CORP
(c)	Address of Issuer's Principal Executive Offices: 233 SOUTH WACKER DRIVE, 233 SOUTH WACKER DRIVE, CHICAGO, ILLINOIS , 60606-7147.
Item 2.	Identity and Background
(a)	This statement is being filed by one or more of the following persons: GGCP, Inc. (GGCP), GGCP Holdings LLC (GGCP Holdings), GAMCO Investors, Inc. (GBL), Associated Capital Group, Inc. (AC), Gabelli Funds, LLC (Gabelli Funds), GAMCO Asset Management Inc. (GAMCO), Teton Advisors, LLC (Teton Advisors), Keeley-Teton Advisors, LLC (Keeley-Teton), Gabelli & Company Investment Advisers, Inc. (GCIA), Morgan Group Holding Co., (MGH), G.research, LLC (G.research), MJG Associates, Inc. (MJG Associates), Gabelli Securities International (Bermuda) Limited (GSIL), Gabelli Foundation, Inc. (Foundation), Mario Gabelli, LICT and CIBL. Those of the foregoing persons signing this Schedule 13D are hereinafter referred to as the Reporting Persons.
(b)	GAMCO is a New York corporation and GBL and MGH are Delaware corporations, each having its principal business office at One Corporate Center, Rye, New York 10580. GGCP is a Wyoming corporation and AC and GCIA are Delaware corporations each having its principal business office 191 Mason Street, Greenwich, CT 06830. GGCP Holdings is a Delaware limited liability corporation having its principal business office at 191 Mason Street, Greenwich, CT 06830. G.research is a Delaware limited liability company having its principal officers at One Corporate Center, Rye, New York 10580. Gabelli Funds is a New York limited liability company having its principal business office at One Corporate Center, Rye, New York 10580. Teton Advisors is a Wyoming limited liability company having its principal place of business at 189 Mason Street, Greenwich, CT 06830. Keeley-Teton Advisors is a Delaware limited liability company having its principal place of business at 141 W. Jackson Blvd., Chicago, IL 60604. MJG Associates is a Connecticut corporation having its principal business office at 191 Mason Street, Greenwich, CT 06830. The Foundation is a Nevada corporation having its principal offices at 165 West Liberty Street, Reno, Nevada 89501. LICT is a Delaware corporation having its principal place of business as 401 Theodore Fremd Avenue, Rye, New York 10580. CIBL, Inc. is a Delaware corporation having its principal place of business as 165 West Liberty Street, Suite 220, Reno, NV 89501.
(c)	GGCP makes investments for its own account and is the manager and a member of GGCP Holdings which is the controlling shareholder of GBL and AC. GBL, a public company whose stock is quoted on the OTCQX platform, is the parent company for a variety of companies engaged in the securities business, including certain of those named below. AC, a public company listed on the New York Stock Exchange, is the parent company for a variety of companies engaged in the securities business, including certain of those listed below. GAMCO, a wholly-owned subsidiary of GBL, is an investment adviser registered under the Investment Advisers Act of 1940, as amended (Advisers Act). GAMCO is an investment manager providing discretionary managed account services for employee benefit plans, private investors, endowments, foundations and others. GCIA, a wholly owned subsidiary of AC, is an investment adviser registered under the Advisers Act and serves as a general partner or investment manager to limited partnerships and offshore investment companies and other accounts. As a part of its business, GCIA may purchase or sell securities for its own account. GCIA or its relying advisers, act as a general partner or investment manager of a number of funds or partnerships, including Gabelli Associates Fund, L.P., Gabelli Associates Fund II, L.P., Gabelli Associates Limited, Gabelli Associates Limited II E, Gabelli Intermediate Credit Fund L.P., GAMA Select Plus Master Fund, Ltd., GAMCO Medical Opportunities L.P., and Gabelli Multimedia Partners, L.P. G.research is a wholly owned subsidiary of MGH. G.research, is a broker-dealer registered under the Securities Exchange Act of 1934, as amended (1934 Act), which may as a part of its business purchase and sell securities for its own account. Gabelli Funds, a wholly owned subsidiary of GBL, is a limited liability company. Gabelli Funds is an investment adviser registered under the Advisers Act which provides advisory services for The Gabelli Equity Trust Inc., The Gabelli Asset Fund, The Gabelli Growth Fund, The Gabelli Convertible and Income Securities Fund Inc., The Gabelli Value 25 Fund Inc., The Gabelli Small Cap Growth Fund, The Gabelli Equity Income Fund, The Gabelli ABC Fund, The Gabelli Global Content & Connectivity Fund, The Gabelli Gold Fund, Inc., The Gabelli Multimedia Trust Inc., The Gabelli Global Rising Income & Dividend Fund, The Gabelli Capital Asset Fund, The Gabelli International Growth Fund, Inc., The Gabelli Global Growth Fund, The Gabelli Utility Trust, The Gabelli Utilities Fund, The Gabelli Dividend Growth Fund, The Gabelli Focused Growth and Income Fund, The Comstock Capital Value Fund, The Gabelli Dividend and Income Trust, The Gabelli Global Utility & Income Trust, The GAMCO Global Gold, Natural Resources, & Income Trust, The GAMCO Natural Resources, Gold & Income Trust, The GDL Fund, Gabelli Enterprise Mergers & Acquisitions Fund, The Gabelli ESG Fund, Inc., The Gabelli International Small Cap Fund, The Gabelli Healthcare & Wellness Rx Trust, The Gabelli Global Small and Mid Cap Value Trust, Gabelli Merger Plus+ Trust Plc, The Gabelli Global Financial Services Fund, The Gabelli Global Mini Mites Fund, The Gabelli Media Mogul Fund, The Gabelli Pet Parents Fund, Keeley Small Cap Fund, The Gabelli U.S. Treasury Money Market Fund, Bancroft Fund Ltd. and Ellsworth Growth & Income Fund Ltd., Gabelli Growth Innovators ETF, Gabelli Love Our Planet & People ETF, Gabelli Automation ETF, Gabelli Commercial Aerospace & Defense ETF, Gabelli Financial Services Opportunities ETF (collectively, the Funds), which are registered investment companies. Gabelli Funds is also the investment adviser to The GAMCO International SICAV (sub-funds GAMCO Merger Arbitrage and GAMCO All Cap Value), a UCITS III vehicle. Teton Advisors, an investment adviser registered under the Advisers Act, provides discretionary advisory services to The TETON Westwood Mighty Mites Fund, The Teton Westwood Balanced Fund, and The TETON Westwood Equity Fund. The TETON Westwood Mighty Mites Fund is sub-advised by Gabelli Funds, and their holdings are included in this filing. Keeley-Teton, an investment adviser registered under the Advisers Act, provides discretionary advisory services to The TETON Convertible Securities Fund and their holding are included in this filing. MJG Associates provides advisory services to private investment partnerships and offshore funds. Mario Gabelli is the sole shareholder, director and employee of MJG Associates. MJG Associates is the Investment Manager of Gabelli International Limited and Gabelli Fund, LDC. Mario J. Gabelli is the general partner of Gabelli Performance Partnership, LP. The Foundation is a private foundation. Mario Gabelli is the Chairman, a Trustee and the Investment Manager of the Foundation. Elisa M. Wilson is the President of the Foundation. LICT is a holding company with operating subsidiaries engaged primarily in the rural telephone industry. LICT actively pursues new business ventures and acquisitions. LICT makes investments in marketable securities to preserve capital and maintain liquidity for financing their business activities and acquisitions and are not engaged in the business of investing, or trading in securities. Mario J. Gabelli is the Chief Executive Officer, a director, and substantial shareholder of LICT. CIBL is a holding company with interest in telecommunications operations, primarily in the rural telephone industry. CIBL actively pursues new business ventures and acquisitions. CIBL makes investments in marketable securities to preserve capital and maintain liquidity for financing their business activities and acquisitions and are not engaged in the business of investing, or trading in securities. Mario J. Gabelli is a director, and substantial shareholder of CIBL. Mario Gabelli is the controlling stockholder, co-Chief Executive Officer and a director of GGCP and Chairman and Chief Executive Officer of GBL. He is the Executive Chairman of AC. Mario Gabelli is also a member of GGCP Holdings. Mario Gabelli is the controlling shareholder of MGH and indirectly of Teton Advisors and Keeley-Teton Advisors.
(d)	Not applicable.
(e)	Not applicable.
(f)	United States.
Item 4.	Purpose of Transaction
	The Reporting Persons file the long form Schedule 13D pursuant to Section 13d-1 of the Securities Exchange Act of 1934 (the "Act") even though they may be technically eligible to file the short form Schedule G. Because the Reporting Persons may regularly communicate with the Issuer's management, filing the Schedule 13D ensures that these conversations are compliant with the reporting obligations under the Exchange Act.
Item 5.	Interest in Securities of the Issuer
(a)	The aggregate number of Securities to which this Schedule 13D relates is 1,953,448 shares, representing 5.50% of the 35,523,634 shares outstanding as reported by the Issuer as of February 26, 2026. The Reporting Persons beneficially own those Securities as follows: Funds 844,950 shares 2.38%, GAMCO 1,100,598 shares 3.10%, Foundation 1,500 shares 0.00%, MJG Associates 4,000 shares 0.01%, AC 100 shares 0.00%, GGCP 1,000 shares 0.00% and Mario Gabelli 1,300 shares 0.00%.
(b)	Each of the Reporting Persons and Covered Persons has the sole power to vote or direct the vote and sole power to dispose or to direct the disposition of the Securities reported for it, either for its own benefit or for the benefit of its investment clients or its partners, as the case may be, except that (i) GAMCO does not have authority to vote 43,600 of the reported shares, (ii) Gabelli Funds has sole dispositive and voting power with respect to the shares of the Issuer held by the Funds so long as the aggregate voting interest of all joint filers does not exceed 25% of their total voting interest in the Issuer and, in that event, the Proxy Voting Committee of each Fund shall respectively vote that Funds shares, (iii) at any time, the Proxy Voting Committee of each such Fund may take and exercise in its sole discretion the entire voting power with respect to the shares held by such fund under special circumstances such as regulatory considerations, and (iv) the power of Mario Gabelli, AC, GBL, and GGCP is indirect with respect to Securities beneficially owned directly by other Reporting Persons.
(c)	Information with respect to all transactions in the Securities which were effected during the past sixty days or since the most recent filing on Schedule 13D, whichever is less, by each of the Reporting Persons and Covered Persons is set forth below: DATE SHARES PURCHASED PRICE /SOLD GABELLI FOUNDATION, INC. 2/11/2026 -300 190.1900 GABELLI FUNDS, LLC GABELLI ASSET FUND 2/20/2026 -1,000 193.7826 2/20/2026 -500 196.3817 2/10/2026 -4,000 189.8418 2/5/2026 -2,000 188.4122 GABELLI EQUITY INCOME FUND 2/20/2026 -800 195.8789 2/20/2026 -700 193.7826 2/2/2026 -600 182.0230 GABELLI EQUITY TRUST 3/2/2026 -500 185.0588 GABELLI DIVIDEND & INCOME TRUST 3/30/2026 -1,000 169.1503 3/30/2026 -500 168.3100 3/24/2026 -500 169.4915 3/2/2026 -700 185.0588 2/23/2026 -500 197.2500 2/20/2026 -500 196.5451 2/20/2026 -1,500 193.7826 GABELLI SMALL CAP GROWTH FUND 3/2/2026 -500 185.0588 2/27/2026 -500 184.7260 2/24/2026 -2,300 197.0843 2/20/2026 -2,200 196.6361 2/20/2026 -3,000 193.7826 2/18/2026 -2,000 194.9118 2/13/2026 -365 190.5000 2/12/2026 -3,835 190.9027 2/5/2026 -800 188.5909 2/2/2026 -1,500 181.8667 GABELLI UTILITIES FUND 3/31/2026 -1,000 168.7248 3/13/2026 -400 167.7328 3/2/2026 -600 185.0500 2/23/2026 -500 195.3000 2/20/2026 -500 196.7800 2/20/2026 -1,000 193.7826 2/11/2026 -4,000 190.5750 2/10/2026 -2,000 189.5728 2/6/2026 -2,000 189.3246 2/4/2026 -2,000 188.5288 2/3/2026 -3,000 183.4670 GABELLI UTILITY TRUST 4/1/2026 -500 171.9350 GAMCO ASSET MANAGEMENT INC. 3/31/2026 -500 170.0162 3/31/2026 -34,000 171.9900 3/30/2026 -1,000 167.8655 3/27/2026 -50 168.9650 3/25/2026 -300 170.0500 3/23/2026 -100 169.8250 3/18/2026 -50 165.8300 3/17/2026 25 167.7600 3/16/2026 -50 167.8952 3/16/2026 50 169.9000 3/13/2026 -100 168.3350 3/12/2026 -50 172.0000 3/10/2026 -100 177.6500 3/9/2026 -50 176.6000 3/9/2026 -1,000 177.2350 3/6/2026 -300 178.3804 3/5/2026 -150 182.0000 3/4/2026 -50 184.3587 3/4/2026 -100 184.3587 3/3/2026 -1,000 183.2280 3/2/2026 -25 181.9100 2/27/2026 -500 184.3420 2/27/2026 -50 186.3100 2/26/2026 -50 188.4200 2/25/2026 -300 189.7500 2/25/2026 -600 194.7500 2/24/2026 -350 196.2129 2/24/2026 -800 196.6167 2/24/2026 -2,400 196.8954 2/23/2026 -2,500 196.4133 2/23/2026 -275 198.9155 2/20/2026 -1,500 195.9367 2/20/2026 -1,750 196.1941 2/20/2026 -2,700 197.4856 2/18/2026 -200 191.3250 2/18/2026 -300 193.8200 2/18/2026 -900 194.8537 2/17/2026 -150 192.7267 2/17/2026 -3,100 193.3144 2/17/2026 -300 194.0000 2/13/2026 -200 190.4050 2/11/2026 -200 188.7850 2/11/2026 -2,500 190.0680 2/10/2026 -400 189.5700 2/9/2026 -700 188.7774 2/9/2026 -100 189.6927 2/6/2026 -1,000 189.0000 2/6/2026 -3,200 189.3246 2/6/2026 -725 189.8555 2/5/2026 -800 188.0049 2/5/2026 -200 189.0707 2/5/2026 -300 189.5500 2/2/2026 -1,500 181.5959 MARIO J. GABELLI 2/27/2026 -300 184.7497 2/24/2026 -200 195.9900
(d)	The investment advisory clients of, or partnerships managed by, GAMCO, Gabelli Funds, Teton Advisors and MJG Associates have the sole right to receive and, subject to the notice, withdrawal and/or termination provisions of such advisory contracts and partnership arrangements, the sole power to direct the receipt of dividends from, and the proceeds of sale of, any of the Securities beneficially owned by such Reporting Persons on behalf of such clients or partnerships. Except as noted, no such client or partnership has an interest by virtue of such relationship that relates to more than 5% of the Securities.
(e)	Not applicable.

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.

GAMCO INVESTORS, INC. ET AL

Signature:	PETER D. GOLDSTEIN
Name/Title:	CHIEF LEGAL OFFICER
Date:	04/02/2026

GABELLI FUNDS LLC

Signature:	DAVID GOLDMAN
Name/Title:	GENERAL COUNSEL
Date:	04/02/2026

GAMCO Asset Management Inc.

Signature:	DOUGLAS R. JAMIESON
Name/Title:	PRESIDENT
Date:	04/02/2026

GABELLI FOUNDATION, INC.

Signature:	DAVID GOLDMAN
Name/Title:	ATTORNEY-IN-FACT
Date:	04/02/2026

MJG ASSOCIATES, INC.

Signature:	DAVID GOLDMAN
Name/Title:	ATTORNEY-IN-FACT
Date:	04/02/2026

GGCP, INC.

Signature:	DAVID GOLDMAN
Name/Title:	ATTORNEY-IN-FACT
Date:	04/02/2026

Associated Capital Group, Inc.

Signature:	PETER D. GOLDSTEIN
Name/Title:	CHIEF LEGAL OFFICER
Date:	04/02/2026

GABELLI MARIO J

Signature:	DAVID GOLDMAN
Name/Title:	ATTORNEY-IN-FACT
Date:	04/02/2026

FAQ

How large is the Gabelli group’s ownership stake in GATX (GATX)?

The Gabelli-affiliated group reports beneficial ownership of 1,953,448 GATX common shares, equal to 5.50% of the 35,523,634 shares outstanding as of February 26, 2026. This makes them a significant, though non‑controlling, shareholder in the company.

Which Gabelli-related entities hold GATX (GATX) shares and in what amounts?

The filing shows Gabelli Funds, LLC holding 844,950 shares and GAMCO Asset Management Inc. holding 1,100,598 shares. Smaller positions include Gabelli Foundation (1,500 shares), MJG Associates (4,000), GGCP (1,000), Associated Capital Group (100) and Mario Gabelli personally (1,300).

Why did the Gabelli group use a long-form Schedule 13D for GATX (GATX)?

They state they file the long-form Schedule 13D even though eligible for a short form because they may regularly communicate with GATX management. Using Schedule 13D helps ensure those discussions remain compliant with their reporting obligations under the Exchange Act.

What recent trading activity in GATX (GATX) shares do the Gabelli entities report?

Item 5 lists numerous recent open‑market transactions, largely sales, by Gabelli funds and GAMCO between February and March 2026. Reported trades include various dates with per‑share prices generally ranging from about $168 to $198, reflecting active position management.

Who controls voting and disposition of the GATX (GATX) shares held by Gabelli entities?

The reporting entities generally have sole power to vote and dispose of their reported GATX shares, subject to advisory and fund arrangements. The filing notes exceptions, such as shares where GAMCO lacks voting authority and circumstances where fund proxy committees may exercise voting power instead.

Does Mario Gabelli personally own GATX (GATX) stock according to this filing?

Yes. The filing attributes 1,300 GATX common shares to Mario Gabelli personally, representing 0.00% of the class. His primary influence arises through control and leadership positions in entities like GGCP, GAMCO, Gabelli Funds and related companies that hold larger stakes.