What SEC filings does GATX Corporation submit to the SEC?

GATX Corporation (GATX) submits several types of SEC filings including Form 4 (insider transactions), Form 144 (proposed insider sales), 8-K reports (material events such as earnings releases, acquisitions, leadership changes), and periodic reports — the 10-Q (quarterly) and 10-K (annual). All filings are publicly available through SEC EDGAR.

What does a Form 4 filing tell me about GATX?

A Form 4 for GATX discloses a transaction by a company insider — typically a director, officer, or 10%+ shareholder. It shows the source-reported date, number of shares, price, and updated ownership. These facts do not establish motive or predict future returns.

How do I interpret an 8-K filing from GATX Corporation?

An 8-K signals a material event requiring prompt disclosure. Common triggers include earnings pre-announcements, acquisitions, leadership appointments or departures, credit changes, or regulatory actions. Read the item codes inside the filing to understand exactly what was disclosed before drawing conclusions.

What is the difference between a 10-K and 10-Q for GATX?

The 10-K is GATX Corporation's annual report with fully audited financial statements, comprehensive MD&A, and complete risk factor disclosures — filed 60–90 days after fiscal year-end. The 10-Q is a lighter quarterly report with unaudited financials filed for the first three quarters. Together they provide a continuous financial picture of the company.

Where can I see all GATX SEC filings directly on EDGAR?

You can view all historical GATX Corporation filings on the SEC EDGAR company page for GATX. Each filing card on this page links directly to the original SEC document.

How often does GATX Corporation file with the SEC?

GATX Corporation files one 10-K per year and up to three 10-Qs per year. Form 4 insider transactions must be reported within two business days of each trade, so the frequency depends on how often insiders are buying or selling GATX shares. 8-K filings occur whenever a material event happens — which can be several times per quarter for an active company.

GATX SEC Filing News — GATX Corporation

Latest SEC filings for GATX Corporation (GATX) explained in plain English. Covers insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). StrongBuyAnalytics provides navigation and brief excerpts or summaries; original filings remain at the SEC/source links and were authored by their filers, not StrongBuyAnalytics. Filing dates shown are source dates. Coverage and detection can be delayed or incomplete because of SEC availability, amendments, parsing, caching, or outages. Latest source filing date shown: 2026-09-11.

GATX Corporation, together its subsidiaries, operates as railcar leasing company in the United States, Canada, Mexico, Europe, and India. It operates through three segments: Rail North America, Rail International, and Engine Leasing. The company leases tank and freight railcars, and locomotives for petroleum, chemical, food/agriculture, and transportation industries. It also offers maintenance services, including the interior cleaning of railcars, routine maintenance and repair of car body and s…

Sector: Industrials Industry: Rental & Leasing Services Market Cap: $5.8B

Total Filings

Bullish Classifications

Bearish Classifications

Insider Transactions

Material Events (8-K)

Periodic Reports

Rule-based classifications for GATX currently lean bearish. Of the 20 filing records displayed, 5 carry bearish classifications (such as insider sales or negative 8-K disclosures) versus 0 bullish. This does not necessarily signal fundamental deterioration — insiders sell for many reasons — but it is worth monitoring alongside the company's core financial metrics.

GATX Filing Activity Snapshot 2026-08-04 — 2026-09-11

Insider Transactions (Form 4)

0 buys vs 5 sells

Net insider selling in this period — insiders sell for many reasons beyond conviction.

Largest Form 144 Filing

$3.28M

THOMAS A ELLMAN · 2026-08-05

18,200 shares · Form 144

Form 144 Notices

Proposed insider sales filed — Form 144 is a notice of intent, not a confirmed transaction. Actual sales are confirmed via Form 4.

Insider Transactions 16 · Forms 3, 4 and 5

A Form 4 is filed within two business days of a company insider — an officer, a director, or a holder of more than ten percent of the stock — changing their position in the shares. All 16 filings in this group are Form 4s for GATX Corporation.

The difficulty with reading these filings as a group is that a single form type covers transactions that mean entirely different things. An executive spending their own money to buy stock and an executive having shares withheld to pay tax on a vesting grant both appear as a Form 4. Every filing below is therefore tagged with the nature of the underlying transaction, taken from the transaction code reported on the form itself.

Across the 16 insider filings shown, the breakdown is 8 compensation award, 5 open-market sale, 2 tax withholding and 1 gift. 5 of them involved a discretionary open-market trade; the rest are compensation and administrative mechanics.

What each transaction type means

Compensation award ×8: Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.
Open-market sale ×5: The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.
Tax withholding ×2: Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.
Gift ×1: Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Form 4 Open-market sale Insider Selling 2026-09-11

GATX insider Phillips Geoffrey (Sr. VP, Operations) sold 2,500 shares (~$444.0K)

Phillips Geoffrey, listed as Sr. VP, Operations at GATX CORP, reported an open-market sale of 2,500 GATX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	2,500	$77.07	$192.7K
`S`	Open-market sale	1,700	$177.12	$301.1K
`S`	Open-market sale	500	$178.06	$89.0K
`S`	Open-market sale	300	$179.51	$53.9K
`M`	Option exercise derivative · 2020 NQ Stock Option (Right to Buy)	2,500	—	—

Filing: Form 4 (Insider Transaction) Insider: Phillips Geoffrey (Sr. VP, Operations) Shares: 2,500 Est. Value: $444.0K

View on SEC EDGAR → Open Filing Document →

Form 4 Gift Tax / Compensation Filing 2026-09-04

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Phillips Geoffrey (Sr. VP, Operations) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were transferred as a gift, typically for estate or charitable planning. No sale into the market took place.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`G`	Gift	6,472	—	—

Filing: Form 4 (Insider Transaction) Insider: Phillips Geoffrey (Sr. VP, Operations) Shares: 6,472

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-27

GATX insider Doygun Eren (SVP Chief Plan. & Invest. Off.) sold 1,000 shares (~$179.5K)

Doygun Eren, listed as SVP Chief Plan. & Invest. Off. at GATX CORP, reported an open-market sale of 1,000 GATX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	1,000	$77.07	$77.1K
`S`	Open-market sale	1,000	$179.52	$179.5K
`M`	Option exercise derivative · 2020 NQ Stock Option (Right to Buy)	1,000	—	—

Filing: Form 4 (Insider Transaction) Insider: Doygun Eren (SVP Chief Plan. & Invest. Off.) Shares: 1,000 Est. Value: $179.5K

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-18

GATX insider Sbragia John (SVP, Engineering and Quality) sold 1,900 shares (~$342.8K)

Sbragia John, listed as SVP, Engineering and Quality at GATX CORP, reported an open-market sale of 1,900 GATX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	1,900	$77.07	$146.4K
`S`	Open-market sale	1,900	$180.40	$342.8K
`F`	Tax withholding on vested shares	47	$179.63	$8.4K
`M`	Option exercise derivative · 2020 NQ Stock Option (Right to Buy)	1,900	—	—

Filing: Form 4 (Insider Transaction) Insider: Sbragia John (SVP, Engineering and Quality) Shares: 1,900 Est. Value: $342.8K

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-18

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Hillesland Kevin (SVP, Structured Finance) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	70	$179.63	$12.6K

Filing: Form 4 (Insider Transaction) Insider: Hillesland Kevin (SVP, Structured Finance) Shares: 70

View on SEC EDGAR → Open Filing Document →

Form 4 Tax withholding Tax / Compensation Filing 2026-08-18

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Shares were withheld by the company to settle tax due when equity vested. This is an automatic administrative step and not a decision to sell.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`F`	Tax withholding on vested shares	70	$179.63	$12.6K

Filing: Form 4 (Insider Transaction) Insider: Phillips Geoffrey (Sr. VP, Operations) Shares: 70

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-07

GATX insider Ellman Thomas A. (EVP & CFO) sold 18,200 shares (~$3.28M)

Ellman Thomas A., listed as EVP & CFO at GATX CORP, reported an open-market sale of 18,200 GATX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	18,200	$77.07	$1.40M
`S`	Open-market sale	9,452	$179.62	$1.70M
`S`	Open-market sale	8,641	$180.56	$1.56M
`S`	Open-market sale	107	$181.20	$19.4K
`M`	Option exercise derivative · 2020 NQ Stock Option (Right to Buy)	18,200	—	—

Filing: Form 4 (Insider Transaction) Insider: Ellman Thomas A. (EVP & CFO) Shares: 18,200 Est. Value: $3.28M

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

WETHERBEE ROBERT S (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	130	$177.91	$23.1K

Filing: Form 4 (Insider Transaction) Insider: WETHERBEE ROBERT S (Director) Shares: 130

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Holmes John McClain III (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	142	$177.91	$25.3K

Filing: Form 4 (Insider Transaction) Insider: Holmes John McClain III (Director) Shares: 142

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Bausch Shelley J (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	142	$177.91	$25.3K

Filing: Form 4 (Insider Transaction) Insider: Bausch Shelley J (Director) Shares: 142

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

YOVOVICH PAUL G (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	130	$177.91	$23.1K

Filing: Form 4 (Insider Transaction) Insider: YOVOVICH PAUL G (Director) Shares: 130

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

REAM JAMES B (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	164	$177.91	$29.2K

Filing: Form 4 (Insider Transaction) Insider: REAM JAMES B (Director) Shares: 164

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Aigotti Diane (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	70	$177.91	$12.5K

Filing: Form 4 (Insider Transaction) Insider: Aigotti Diane (Director) Shares: 70

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Stanley Adam L. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	28	$177.91	$5.0K

Filing: Form 4 (Insider Transaction) Insider: Stanley Adam L. (Director) Shares: 28

View on SEC EDGAR → Open Filing Document →

Form 4 Compensation award Tax / Compensation Filing 2026-08-05

GATX insider Form 4 filed for equity award, exercise, or tax withholding

Arvia Anne L (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Shares were granted as compensation rather than purchased. No cash changed hands, so the filing reflects a pay decision by the company, not a judgement about the price.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`A`	Compensation award	118	$177.91	$21.0K

Filing: Form 4 (Insider Transaction) Insider: Arvia Anne L (Director) Shares: 118

View on SEC EDGAR → Open Filing Document →

Form 4 Open-market sale Insider Selling 2026-08-04

GATX insider Van Aken Jennifer (Sr VP Treasurer & CRO) sold 1,700 shares (~$307.2K)

Van Aken Jennifer, listed as Sr VP Treasurer & CRO at GATX CORP, reported an open-market sale of 1,700 GATX shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

The insider sold shares on the open market. Sales may be discretionary or executed automatically under a pre-arranged Rule 10b5-1 trading plan, and a Form 4 does not always make clear which applies.

Transactions reported on this filing
Code	Nature	Shares	Price	Value
`M`	Option exercise	1,700	$77.07	$131.0K
`S`	Open-market sale	1,372	$180.58	$247.8K
`S`	Open-market sale	328	$181.23	$59.4K
`M`	Option exercise derivative · 2020 NQ Stock Option (Right to Buy)	1,700	—	—

Filing: Form 4 (Insider Transaction) Insider: Van Aken Jennifer (Sr VP Treasurer & CRO) Shares: 1,700 Est. Value: $307.2K

View on SEC EDGAR → Open Filing Document →

Proposed Insider Sales 4 · Form 144

A Form 144 is a notice of intent to sell restricted or control securities. It is not a record that anything was sold. GATX Corporation has 4 such notices in this period.

The distinction matters because a Form 144 is frequently reported as though it were a completed insider sale. The filer may sell all of the shares covered, some of them, or none at all, and there is no obligation to update the notice either way. A sale that is actually executed by an officer or director shows up separately on a Form 4, which is the filing to check before treating a proposed sale as a real one.

Form 144 Proposed Insider Sale 2026-09-11

GATX Form 144 filed for proposed insider sale by GEOFFREY D PHILLIPS (2,500 shares) ~$444.0K

GEOFFREY D PHILLIPS filed a Form 144 with the SEC indicating intent to sell GATX (GATX CORP) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: GEOFFREY D PHILLIPS Shares: 2,500 Est. Value: $444.0K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-26

GATX Form 144 filed for proposed insider sale by EREN DOYGUN (1,000 shares) ~$179.5K

EREN DOYGUN filed a Form 144 with the SEC indicating intent to sell GATX (GATX CORP) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: EREN DOYGUN Shares: 1,000 Est. Value: $179.5K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-14

GATX Form 144 filed for proposed insider sale by JOHN M. SBRAGIA (1,900 shares) ~$342.8K

JOHN M. SBRAGIA filed a Form 144 with the SEC indicating intent to sell GATX (GATX CORP) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: JOHN M. SBRAGIA Shares: 1,900 Est. Value: $342.8K

View on SEC EDGAR → Open Filing Document →

Form 144 Proposed Insider Sale 2026-08-05

GATX Form 144 filed for proposed insider sale by THOMAS A ELLMAN (18,200 shares) ~$3.28M

THOMAS A ELLMAN filed a Form 144 with the SEC indicating intent to sell GATX (GATX CORP) shares. Form 144 reflects a proposed sale, not a completed transaction. The actual execution, if any, would typically appear later in a Form 4.

Filing: Form 144 (Proposed Sale Notice) Insider: THOMAS A ELLMAN Shares: 18,200 Est. Value: $3.28M

View on SEC EDGAR → Open Filing Document →

How we classify GATX Corporation's filings

Straight from EDGAR

Each displayed record links to an original source document. StrongBuyAnalytics provides navigation and brief excerpts or summaries, not the filing itself. Parsing may omit context or contain errors, so read the original document in full.

Transaction codes, not guesswork

The nature shown on each insider filing comes from the transaction code the filer entered on the form itself — P for an open-market purchase, A for a compensation award, F for shares withheld to pay tax, M for an option exercise. Where one filing contains several codes, the transaction table lists them line by line.

Why the distinction matters

Insider activity is routinely summarised as buying or selling, which flattens together decisions that mean very different things. Shares withheld for tax on a vesting grant are an automatic administrative step; shares bought on the open market are someone committing their own money at the current price.

What this page does not tell you

A filing records what happened, not why. Form 4 does not always disclose whether a sale was executed under a pre-arranged Rule 10b5-1 plan, and no single filing is a basis for a decision on GATX. Read these alongside the fundamentals rather than in isolation.

Frequently Asked Questions — GATX SEC Filings

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GATX Full Analysis

Publisher, sources & limitations — September 15, 2026. StrongBuyAnalytics provides navigation and brief excerpts or summaries for educational use. Original filings remain at SEC EDGAR or other displayed source links; StrongBuyAnalytics does not author them. Filing dates are source dates, not publication dates for this page. Coverage can be delayed, incomplete, amended, or unavailable because of SEC/source availability, parsing, caching, or outages. Verify every material statement in the original filing.

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