As of November 6, 2026, 4 holders' latest Schedule 13D or 13G filings report owning 5% or more of Gatx Corp. The largest reported stake is BlackRock, Inc.'s, at 11.5%. 7 filings are on record since July 15, 2025 (Schedule 13G/A, July 18, 2025).
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Key facts
- · Reporting person: Earnest Partners LLC · Sole voting: 1,626,302 · Shared voting: 409,171 · Sole dispositive: 2,606,241 · Shared dispositive: 0 · SCHEDULE 13G/A, 2026-05-15
- · Reporting person: Vanguard Portfolio Management · Sole voting: 15,758 · Shared voting: 0 · Sole dispositive: 2,031,210 · Shared dispositive: 0 · SCHEDULE 13G, 2026-04-29
- · Reporting person: Vanguard Capital Management · Sole voting: 265,160 · Shared voting: 0 · Sole dispositive: 1,844,616 · Shared dispositive: 0 · SCHEDULE 13G, 2026-04-29
- · Reporting person: Gamco Investors, Inc. Et Al · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-04-02
- · Holder: The Vanguard Group · Percent: 0% · SCHEDULE 13G/A
Gatx Corp has 7 Schedule 13D or 13G filings on record since 2025-07-15. 4 holders' latest filing reports 5% or more of common stock. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| BlackRock, Inc. | 11.5% | 5,010,325 | SCHEDULE 13G/A, 2025-07-18 | 2025-06-30 |
| Earnest Partners LLC | 7.3% | 2,606,241 | SCHEDULE 13G/A, 2026-05-15 | 2026-03-31 |
| Vanguard Portfolio Management | 5.71% | 2,031,210 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| Vanguard Capital Management | 5.19% | 1,844,616 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| Dimensional Fund Advisors LP | 4.5% | 1,605,404 | SCHEDULE 13G/A, 2025-07-15 | 2025-06-30 |
| Gamco Investors, Inc. Et Al | 3.1% | 0 | SCHEDULE 13D/A, 2026-04-02 | 2026-03-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
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More on Gatx Corp and the records around it.
Gatx Corp elsewhere on the record
Companies that share a holder
- EARNEST PARTNERS LLC also filed stake reports on 18 other companies: FORMFACTOR INC (Aug 2026), PAPA JOHNS INTERNATIONAL INC (Aug 2026), Sabre Corp (Aug 2026)
- GAMCO INVESTORS, INC. ET AL also filed stake reports on 45 other companies: WESTWOOD HOLDINGS GROUP INC (Nov 2026), NATHANS FAMOUS, INC. (Oct 2026), BEASLEY BROADCAST GROUP INC (Oct 2026)
- Dimensional Fund Advisors LP also filed stake reports on 366 other companies: Acadia Healthcare Co Inc (Oct 2026), ADT Inc (Oct 2026), AGCO Corp (Oct 2026)
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Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| Earnest Partners LLC | 1,626,302 | 409,171 | 2,606,241 | 0 | SCHEDULE 13G/A, 2026-05-15 |
| Vanguard Portfolio Management | 15,758 | 0 | 2,031,210 | 0 | SCHEDULE 13G, 2026-04-29 |
| Vanguard Capital Management | 265,160 | 0 | 1,844,616 | 0 | SCHEDULE 13G, 2026-04-29 |
| Gamco Investors, Inc. Et Al | 0 | 0 | 0 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| Gabelli Funds LLC | 844,950 | 0 | 844,950 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| GAMCO Asset Management Inc. | 1,056,998 | 0 | 1,100,598 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| Gabelli Foundation, Inc. | 1,500 | 0 | 1,500 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| Mjg Associates, Inc. | 4,000 | 0 | 4,000 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| Ggcp, Inc. | 1,000 | 0 | 1,000 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| Associated Capital Group, Inc. | 100 | 0 | 100 | 0 | SCHEDULE 13D/A, 2026-04-02 |
| Gabelli Mario J | 1,300 | 0 | 1,300 | 0 | SCHEDULE 13D/A, 2026-04-02 |
The latest filing identifies Gatx Corp by CUSIP 361448103 and gives its principal executive office as 233 SOUTH WACKER DRIVE, CHICAGO, IL 60606-7147 (SCHEDULE 13G/A, 2026-05-15).
Purpose of Transaction (Item 4)
Gamco Investors, Inc. Et Al
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 4 of the SCHEDULE 13D/A filed 2026-04-02
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-07-15 | Dimensional Fund Advisors LP | 4.5% | SCHEDULE 13G/A |
| 2025-07-18 | BlackRock, Inc. | 11.5% | SCHEDULE 13G/A |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-02 | Gamco Investors, Inc. Et Al | 3.1% | SCHEDULE 13D/A |
| 2026-04-29 | Vanguard Capital Management | 5.19% | SCHEDULE 13G |
| 2026-04-29 | Vanguard Portfolio Management | 5.71% | SCHEDULE 13G |
| 2026-05-15 | Earnest Partners LLC | 7.3% | SCHEDULE 13G/A |
Questions about who owns Gatx Corp
Who owns Gatx Corp?
On this page, 4 holders' latest ownership filings report 5% or more of Gatx Corp: BlackRock, Inc. (11.5%, Schedule 13G/A, filed 2025-07-18), Earnest Partners LLC (7.3%, Schedule 13G/A, filed 2026-05-15), Vanguard Portfolio Management (5.71%, Schedule 13G, filed 2026-04-29) and Vanguard Capital Management (5.19%, Schedule 13G, filed 2026-04-29).
Who are the largest shareholders of Gatx Corp?
By the share each holder's latest filing reports, the largest holders of Gatx Corp on this page are BlackRock, Inc. (11.5%), Earnest Partners LLC (7.3%) and Vanguard Portfolio Management (5.71%).
When did BlackRock, Inc. buy into Gatx Corp?
The filings give report dates, not purchase dates. The earliest filing from BlackRock, Inc. on this page is the Schedule 13G/A, filed 2025-07-18, reporting 11.5%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.