Who owns GATX (GATX)
Which tracked institutional funds hold GATX, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See GATX company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
85 tracked funds added or opened GATX while 61 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
GATX’s largest tracked holder by dollar value, STATE FARM MUTUAL AUTOMOBILE INSURANCE CO, sizes it at 0.7% of its own reported 13F book, while the median holder sizes it at 0.0% of theirs — a 0.6pp conviction gap — its largest holder concentrates the name more heavily than the typical one.
Book-share is each fund’s reported value in GATX divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 381 tracked filers holding GATX, 166 increased or opened the position and 194 reduced or closed it; over the same quarter, there were no open-market insider Form 4s.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in GATX between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 11
- Capital International Investors$44M
- Jupiter Topco LLC$25M
- Hudson Bay Capital Management LP$7M
- Brevan Howard Capital Management LP$3M
- Schonfeld Strategic Advisors LLC$2M
- Freestone Grove Partners LP$2M
Full exits 30
- NATIXIS ADVISORS, LLC$48M
- JANUS HENDERSON GROUP PLC$24M
- WINSLOW ASSET MANAGEMENT INC$8M
- NEW YORK STATE TEACHERS RETIREMENT SYSTEM$5M
- Nicholas Investment Partners, LP$4M
- CANADA LIFE ASSURANCE Co$4M
Largest adds
- BlackRock, Inc.$142M
- Invesco Ltd.$39M
- STATE FARM MUTUAL AUTOMOBILE INSURANCE CO$35M
- AMERICAN CENTURY COMPANIES INC$32M
- STATE STREET CORP$20M
- DIMENSIONAL FUND ADVISORS LP$19M
Largest trims
- WELLINGTON MANAGEMENT GROUP LLP$23M
- FMR LLC$21M
- AMERIPRISE FINANCIAL INC$11M
- D. E. Shaw & Co., Inc.$4M
- TUDOR INVESTMENT CORP ET AL$4M
- Goelzer Investment Management, Inc.$3M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| STATE FARM MUTUAL AUTOMOBILE INSURANCE CO | 5,427,338 | $962M | 15.5% | 2026-Q2 |
| BlackRock, Inc. added | 4,645,044 | $823M | 13.3% | 2026-Q2 |
| EARNEST PARTNERS LLC trimmed | 2,556,697 | $453M | 7.3% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 2,050,023 | $363M | 5.9% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 1,598,617 | $283M | 4.6% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 1,525,505 | $270M | 4.4% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 1,395,456 | $247M | 4.0% | 2026-Q2 |
| STATE STREET CORP added | 1,386,474 | $246M | 4.0% | 2026-Q2 |
| GAMCO INVESTORS, INC. ET AL trimmed | 1,054,962 | $187M | 3.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ trimmed | 1,004,807 | $178M | 2.9% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 963,422 | $171M | 2.8% | 2026-Q2 |
| GABELLI FUNDS LLC trimmed | 811,150 | $144M | 2.3% | 2026-Q2 |
| SEI INVESTMENTS CO trimmed | 761,464 | $135M | 2.2% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 679,715 | $120M | 1.9% | 2026-Q2 |
| VAUGHAN NELSON INVESTMENT MANAGEMENT, L.P. added | 642,900 | $114M | 1.8% | 2026-Q2 |
| NORTHERN TRUST CORP added | 624,625 | $111M | 1.8% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. added | 581,469 | $99M | 1.6% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC trimmed | 416,267 | $74M | 1.2% | 2026-Q2 |
| FMR LLC trimmed | 397,767 | $70M | 1.1% | 2026-Q2 |
| NORGES BANK trimmed | 372,472 | $66M | 1.1% | 2026-Q2 |
| MORGAN STANLEY added | 339,310 | $60M | 1.0% | 2026-Q2 |
| Ensign Peak Advisors, Inc trimmed | 308,751 | $55M | 0.9% | 2026-Q2 |
| Bank of New York Mellon Corp trimmed | 288,829 | $51M | 0.8% | 2026-Q2 |
| Invesco Ltd. added | 284,778 | $50M | 0.8% | 2026-Q2 |
| Capital International Investors new | 250,871 | $44M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO added | 237,457 | $42M | 0.7% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC trimmed | 206,562 | $37M | 0.6% | 2026-Q2 |
| JONES FINANCIAL COMPANIES LLLP added | 184,157 | $34M | 0.5% | 2026-Q2 |
| NEW YORK STATE COMMON RETIREMENT FUND trimmed | 176,422 | $31M | 0.5% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 176,377 | $31M | 0.5% | 2026-Q2 |
| ProShare Advisors LLC trimmed | 176,023 | $31M | 0.5% | 2026-Q2 |
| TUDOR INVESTMENT CORP ET AL trimmed | 154,990 | $27M | 0.4% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC trimmed | 152,621 | $27M | 0.4% | 2026-Q2 |
| UBS Group AG added | 149,917 | $27M | 0.4% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 149,191 | $26M | 0.4% | 2026-Q2 |
| Jupiter Topco LLC new | 143,133 | $25M | 0.4% | 2026-Q2 |
| EULAV Asset Management added | 138,751 | $25M | 0.4% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 135,376 | $24M | 0.4% | 2026-Q2 |
| Walleye Capital LLC trimmed | 122,415 | $22M | 0.3% | 2026-Q2 |
| RHUMBLINE ADVISERS added | 110,806 | $20M | 0.3% | 2026-Q2 |
| Nuveen, LLC added | 110,800 | $20M | 0.3% | 2026-Q2 |
| LOOMIS SAYLES & CO L P trimmed | 106,167 | $19M | 0.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC trimmed | 88,755 | $16M | 0.3% | 2026-Q2 |
| Retirement Systems of Alabama trimmed | 85,497 | $15M | 0.2% | 2026-Q2 |
| Harbor Island Capital LLC | 83,396 | $15M | 0.2% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 81,110 | $14M | 0.2% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 74,096 | $13M | 0.2% | 2026-Q2 |
| Swiss National Bank added | 67,700 | $12M | 0.2% | 2026-Q2 |
| Clearbridge Investments, LLC trimmed | 67,542 | $12M | 0.2% | 2026-Q2 |
| Hodges Capital Management Inc. added | 65,491 | $12M | 0.2% | 2026-Q2 |
| CITADEL ADVISORS LLC added | 62,593 | $11M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 54,300 | $10M | 0.2% | 2026-Q2 |
| CITIGROUP INC added | 52,298 | $9M | 0.1% | 2026-Q2 |
| Philadelphia Financial Management of San Francisco, LLC trimmed | 50,500 | $9M | 0.1% | 2026-Q2 |
| Legal & General Group Plc trimmed | 48,001 | $9M | 0.1% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 47,713 | $8M | 0.1% | 2026-Q2 |
| Hudson Bay Capital Management LP added | 40,178 | $7M | 0.1% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM added | 39,143 | $7M | 0.1% | 2026-Q2 |
| Dana Investment Advisors, Inc. trimmed | 38,967 | $7M | 0.1% | 2026-Q2 |
| DEUTSCHE BANK AG\ added | 37,564 | $7M | 0.1% | 2026-Q2 |
| MetLife Investment Management, LLC added | 37,412 | $7M | 0.1% | 2026-Q2 |
| Qube Research & Technologies Ltd trimmed | 37,272 | $7M | 0.1% | 2026-Q2 |
| Community Bank of Raymore | 36,998 | $7M | 0.1% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 36,742 | $7M | 0.1% | 2026-Q2 |
| LEVEL FOUR ADVISORY SERVICES, LLC added | 36,291 | $6M | 0.1% | 2026-Q2 |
| OPPENHEIMER ASSET MANAGEMENT INC. trimmed | 35,053 | $6M | 0.1% | 2026-Q2 |
| XTX Topco Ltd added | 32,767 | $6M | 0.1% | 2026-Q2 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE trimmed | 32,467 | $6M | 0.1% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC trimmed | 31,523 | $6M | 0.1% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 28,675 | $5M | 0.1% | 2026-Q2 |
| Creative Planning trimmed | 28,405 | $5M | 0.1% | 2026-Q2 |
| WHITTIER TRUST CO added | 28,256 | $5M | 0.1% | 2026-Q2 |
| FIFTH THIRD BANCORP trimmed | 28,196 | $5M | 0.1% | 2026-Q2 |
| Connor, Clark & Lunn Investment Management Ltd. added | 27,576 | $5M | 0.1% | 2026-Q2 |
| Allianz Asset Management GmbH added | 27,179 | $5M | 0.1% | 2026-Q2 |
| US BANCORP \DE\ added | 23,217 | $4M | 0.1% | 2026-Q2 |
| INTECH INVESTMENT MANAGEMENT LLC added | 23,123 | $4M | 0.1% | 2026-Q2 |
| RICE HALL JAMES & ASSOCIATES, LLC trimmed | 22,720 | $4M | 0.1% | 2026-Q2 |
| GUGGENHEIM CAPITAL LLC trimmed | 22,377 | $4M | 0.1% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 22,026 | $4M | 0.1% | 2026-Q2 |
| Russell Investments Group, Ltd. added | 21,416 | $4M | 0.1% | 2026-Q2 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. added | 20,658 | $4M | 0.1% | 2026-Q2 |
| TWO SIGMA INVESTMENTS, LP trimmed | 19,691 | $3M | 0.1% | 2026-Q2 |
| Knights of Columbus Asset Advisors LLC added | 19,576 | $3M | 0.1% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 18,819 | $3M | 0.1% | 2026-Q2 |
| Quantbot Technologies LP added | 18,685 | $3M | 0.1% | 2026-Q2 |
| SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC added | 18,287 | $3M | 0.1% | 2026-Q2 |
| Quantinno Capital Management LP added | 17,995 | $3M | 0.1% | 2026-Q2 |
| BANK OF MONTREAL /CAN/ added | 16,864 | $3M | 0.0% | 2026-Q2 |
| North Star Investment Management Corp. added | 16,023 | $3M | 0.0% | 2026-Q2 |
| Jump Financial, LLC added | 14,587 | $3M | 0.0% | 2026-Q2 |
| Brevan Howard Capital Management LP added | 14,393 | $3M | 0.0% | 2026-Q2 |
| NFJ INVESTMENT GROUP, LLC trimmed | 13,745 | $2M | 0.0% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 13,646 | $2M | 0.0% | 2026-Q2 |
| LPL Financial LLC trimmed | 13,497 | $2M | 0.0% | 2026-Q2 |
| MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC trimmed | 12,829 | $2M | 0.0% | 2026-Q2 |
| State of Tennessee, Department of Treasury added | 12,773 | $2M | 0.0% | 2026-Q2 |
| Atria Investments, Inc trimmed | 12,610 | $2M | 0.0% | 2026-Q2 |
| Central Pacific Bank - Trust Division | 12,500 | $2M | 0.0% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 12,442 | $2M | 0.0% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.