# EDGAR Filing Document

**Accession Number:** 0001487712
**File Stem:** 0001193125-26-154873
**Filing Date:** 2026-4
**Character Count:** 8304
**Document Hash:** dd3bbc1eb336c459acb92246c2c4f744
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-154873.hdr.sgml**: 20260414

**ACCESSION NUMBER**: 0001193125-26-154873

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 12

**CONFORMED PERIOD OF REPORT**: 20260408

**ITEM INFORMATION**: Cost Associated with Exit or Disposal Activities

**FILED AS OF DATE**: 20260414

**DATE AS OF CHANGE**: 20260414

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** SUMISHO AIR LEASE CORP
- **CENTRAL INDEX KEY:** 0001487712
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-EQUIPMENT RENTAL & LEASING, NEC [7359]
- **ORGANIZATION NAME:** 07 Trade & Services
- **EIN:** 271840403
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-35121
- **FILM NUMBER:** 26860837

**BUSINESS ADDRESS:**
- **STREET 1:** 2000 AVENUE OF THE STARS
- **STREET 2:** SUITE 1000N
- **CITY:** LOS ANGELES
- **STATE:** CA
- **ZIP:** 90067
- **BUSINESS PHONE:** (310) 553-0555

**MAIL ADDRESS:**
- **STREET 1:** 2000 AVENUE OF THE STARS
- **STREET 2:** SUITE 1000N
- **CITY:** LOS ANGELES
- **STATE:** CA
- **ZIP:** 90067

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIR LEASE CORP
- **DATE OF NAME CHANGE:** 20100916

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** AIR LEASE Corp
- **DATE OF NAME CHANGE:** 20100323

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

### FORM 8-K

#### CURRENT REPORT

#### PURSUANT TO SECTION 13 OR 15(d)

#### OF THE SECURITIES EXCHANGE ACT OF 1934

#### April 8, 2026

#### Date of Report

#### (Date of earliest event reported)

## SUMISHO AIR LEASE CORPORATION

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **001-35121** | **27-1840403** |
| **(State or other jurisdiction of**<br>**incorporation)** | **(Commission**<br>**File Number)** | **(I.R.S. Employer**<br>**Identification No.)** |

---

---

| | |
|:---|:---|
| **2000 Avenue of the Stars, Suite 1000N** |  |
| **Los Angeles, California** | **90067** |
| **(Address of principal executive offices)** | **(Zip Code)** |

---

#### Registrant's telephone number, including area code: (310) 553-0555

#### Not Applicable

#### (Former name or former address, if changed since last report.)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br>**Symbol(s)** | **Name of each exchange**<br>**on which registered** |
| Class A Common Stock\* | AL | New York Stock Exchange\* |
| 3.700% Medium-Term Notes, Series A, due April 15, 2030 | AL30 | New York Stock Exchange\* |

---

\* On April 8, 2026, the New York Stock Exchange filed a Form 25 with the Securities and Exchange Commission to delist the registrant's common stock and 3.700% Medium-Term Notes, Series A, due April 15, 2030. The delisting will become effective on April 18, 2026.

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

------

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| | |
|:---|:---|
| **Item 2.05.** | **Costs Associated with Exit or Disposal Activities.** |

---

In connection with the completion of the previously announced merger (the "Merger") involving Sumisho Air Lease Corporation (the "Company") merging with and into Takeoff Merger Sub Inc., a Delaware corporation, with the Company surviving the Merger as an indirect subsidiary of Sumisho Air Lease Corporation Designated Activity Company (formerly known as Gladiatora Designated Activity Company), an Irish private limited company, on April 8, 2026, the Company approved a plan to reduce its workforce, currently affecting 64 employees, a 40% reduction in workforce as compared to December 31, 2025. Impacted employees were notified between April 8, 2026 and April 10, 2026, and workforce reductions related to announced plans are expected to be completed in the second and third quarters of 2026. All employees affected by the reduction in workforce will be eligible to receive, among other things, severance payments based on the applicable employee's length of service with the Company and the continuation of benefits for a specified time period post-termination. Each affected employee's eligibility for severance benefits is contingent upon such employee's execution of a separation agreement, which includes a general release of claims against the Company.

As of the date of this filing, the Company cannot reasonably estimate the costs and charges in connection with these actions. The Company will file an amendment to this Current Report on Form 8-K when such estimates are known.

#### Forward-Looking Statements
This Current Report on Form 8-K contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as "anticipates," "expects," "intends," "plans," "projects," "believes," "may," "will," "would," "could," "should," "seeks," "estimates" and variations on these words and similar expressions are intended to identify such forward-looking statements.

All statements, other than historical facts, including statements regarding the expected decrease in headcount, timing of the reduction in workforce, payments and benefits to be provided and any assumptions underlying the foregoing, are forward-looking statements. Such statements are based upon current plans, estimates and expectations that are subject to risks, uncertainties and assumptions. Should one or more of these risks or uncertainties materialize, or should underlying assumptions prove incorrect, actual results may vary materially from those indicated or anticipated by such forward-looking statements. The inclusion of such statements should not be regarded as a representation that such plans, estimates or expectations will be achieved. You should not place undue reliance on such statements. Important factors that could cause actual results to differ materially from such plans, estimates or expectations include risk factors as detailed from time to time in the Company's reports filed with the Securities and Exchange Commission (the "SEC"), including the Company's Annual Report on Form 10-K for the year ended December 31, 2025, which is available on the SEC's website (www.sec.gov). In addition, new risks and uncertainties may emerge from time to time, and it is not possible for the Company to predict or assess the impact of every factor that may cause its actual results to differ from those contained in any forward-looking statements. Such forward-looking statements speak only as of the date of this Current Report on Form 8-K. The Company expressly disclaims any obligation to revise or update publicly any forward-looking statement to reflect actual results or events or circumstances after the date hereof or to reflect the occurrence of unanticipated events.

------

#### SIGNATURE
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

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| | |
|:---|:---|
|  | SUMISHO AIR LEASE CORPORATION |
| Date: April 14, 2026 | /s/ Sabrina Lemmens |
|  | Sabrina Lemmens |
|  | Chief Financial Officer |

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