Marten Transport, Ltd.

Shareholders of Marten Transport, Ltd.

Marten Transport, Ltd. is a Nasdaq-listed company. Its proxy statement filed March 17, 2026 discloses beneficial ownership by directors, executive officers and holders of more than 5% of its common stock, out of 81,589,135 shares outstanding as of March 6, 2026. The largest disclosed holder is Randolph L. Marten, the company’s Chairman and Chief Executive Officer, who beneficially owned 17,713,940 shares, approximately 21.7% of shares outstanding. Christine K. Marten was reported holding 5,211,856 shares, approximately 6.4%. Among institutional investors, BlackRock, Inc. disclosed a stake of 9,221,304 shares (approximately 11.3%), Nuance Investments, LLC disclosed 6,267,339 shares (approximately 7.7%), and Dimensional Fund Advisors LP disclosed 4,737,681 shares (approximately 6.0%). These figures come from the proxy statement’s beneficial-ownership table and related Schedule 13D/13G filings rather than a complete shareholder register, so holders below the 5% reporting threshold are not individually identified. Marten Transport, Ltd. has one class of common stock outstanding, with no evidence found of separate voting or non-voting share classes.

Ultimate beneficial ownership

United States securities law does not require public companies such as Marten Transport, Ltd. to designate a formal ultimate beneficial owner under a fixed statutory threshold; disclosure instead follows SEC beneficial-ownership reporting rules. Based on that disclosure, Randolph L. Marten, Chairman and Chief Executive Officer, holds the largest individual beneficial stake, approximately 21.7% (17,713,940 shares), held directly, as reported in the proxy statement filed March 17, 2026. No indirect ownership chain applies to this holding. Christine K. Marten’s separately disclosed 6.4% stake has not been identified in official filings as part of a combined beneficial-ownership group with Randolph L. Marten’s holding, so it is reported here as a separate position rather than combined into a single calculated percentage.

Data availability

For Nasdaq-listed companies such as Marten Transport, Ltd., United States ownership disclosure is limited to holders of 5% or more of outstanding shares and to directors and executive officers, as reported in Schedule 13D/13G filings and the annual proxy statement. The complete shareholder base, including smaller institutional and retail holders, is not publicly itemized, so this information should be treated as major-shareholders-only and current as of the proxy statement’s ownership date rather than in real time.

Sources

• SEC EDGAR, DEF 14A Proxy Statement, Marten Transport, Ltd., filed March 17, 2026, https://www.sec.gov/Archives/edgar/data/799167/000143774926008503/mrtn20260306_def14a.htm, retrieved September 9, 2026.
• SEC EDGAR, Form 10-K for fiscal year 2025, filed February 27, 2026, https://www.sec.gov/Archives/edgar/data/799167/000143774926005971/mrtn20251231_10k.htm, retrieved September 9, 2026.

Directors and officers of Marten Transport, Ltd.

As of its proxy statement filed March 17, 2026, Marten Transport, Ltd. disclosed a seven-member board of directors: Randolph L. Marten (Chairman and Chief Executive Officer, director since October 1980), Larry B. Hagness (director since 1991), Jerry M. Bauer (director since 1997), Robert L. Demorest (director since 2007, Lead Independent Director), Ronald R. Booth (director since 2015), Kathleen P. Iverson (director since 2020) and Patricia L. Jones (director since 2023). The currently disclosed named executive officers are Randolph L. Marten (Chairman and Chief Executive Officer), Douglas P. Petit (President, since August 30, 2021), James J. Hinnendael (Executive Vice President and Chief Financial Officer), Adam D. Phillips (Executive Vice President and Chief Operating Officer, since December 13, 2023) and Randall J. Baier (Executive Vice President and Chief Technology Officer). All are reported by the company as active. Nationalities are not disclosed for any of these individuals in SEC filings; United States proxy and governance disclosure rules do not require nationality reporting. This overview reflects the company’s proxy statement dated March 6, 2026 and its 2025 filings on executive changes.

Recent officer changes

• Chief Executive Officer transition: Timothy M. Kohl retired as Chief Executive Officer effective September 30, 2025; Randolph L. Marten, previously Executive Chairman, became Chairman of the Board and Chief Executive Officer effective October 1, 2025 (source: Form 8-K filed August 19, 2025).
• Adam D. Phillips was appointed Executive Vice President and Chief Operating Officer effective December 13, 2023, having served as Chief Operating Officer since March 2023 (source: company press release, December 13, 2023).
• Douglas P. Petit was appointed President effective August 30, 2021, succeeding Timothy M. Kohl, who had become Chief Executive Officer earlier that year (source: Form 8-K exhibit, August 2021).

Data availability

United States federal securities regulations require Nasdaq-listed companies such as Marten Transport, Ltd. to disclose director and named-executive-officer roles, tenure and compensation in annual proxy statements, but they do not require disclosure of nationality or country of residence, so those fields are marked not disclosed. Officers below the named-executive-officer threshold, including any company secretary, are not addressed in the current public filings reviewed for this profile.

Sources

• SEC EDGAR, DEF 14A Proxy Statement, Marten Transport, Ltd., filed March 17, 2026, https://www.sec.gov/Archives/edgar/data/799167/000143774926008503/mrtn20260306_def14a.htm, retrieved September 9, 2026.
• SEC EDGAR, Form 8-K, filed August 19, 2025, https://www.sec.gov/Archives/edgar/data/799167/000143774925027355/mrtn20250819_8k.htm, retrieved September 9, 2026.
• SEC EDGAR, Form 8-K exhibit, filed August 2021, https://www.sec.gov/Archives/edgar/data/799167/000143774921021307/ex_280226.htm, retrieved September 9, 2026.
• GlobeNewswire, company press release, December 13, 2023, https://www.globenewswire.com/news-release/2023/12/13/2795864/13748/en/MARTEN-TRANSPORT-APPOINTS-ADAM-PHILLIPS-AS-EXECUTIVE-VICE-PRESIDENT-AND-CHIEF-OPERATING-OFFICER.html, retrieved September 9, 2026.

Group structure of Marten Transport, Ltd.

No verified parent company or subsidiary relationships were located for Marten Transport, Ltd. in government registries or SEC filings reviewed as of September 2026. The company is a Nasdaq-listed public entity, and no controlling corporate parent was identified in its filings. Its Form 10-K describes internal business platforms, including temperature-controlled and dry truckload service, dedicated fleet service, brokerage service, and a Mexico-focused operation marketed as MRTN de Mexico, but these appear to be operating platforms of the single parent legal entity rather than separately incorporated subsidiaries with independently verifiable registration numbers; no subsidiary registration details could be confirmed. Because no relevant subsidiary listing or comparable disclosure was located, the available corporate-linkage information for Marten Transport, Ltd. is best categorized as Not found, without implying that the company has no subsidiaries, only that none could be verified from the sources reviewed.

Verified corporate relationships

No verified parent, subsidiary or sister-company relationships were identified from the sources reviewed, so no relationship table is presented.

Recent structural changes

• Effective September 30, 2025, Marten Transport, Ltd. completed the sale of assets related to its intermodal business, including approximately 1,200 refrigerated railroad containers, to Hub Group, Inc. for approximately $51.8 million in cash, as reported in the company’s Form 8-K filed October 6, 2025. This was disclosed as an asset sale rather than the transfer of a subsidiary company, and Marten Transport, Ltd. no longer reports intermodal as a service platform following the transaction.

Data availability

Corporate-linkage information for Marten Transport, Ltd. should be treated as Not found: the government registry data, SEC filings and company disclosures reviewed do not identify a parent company or list subsidiary entities with registration numbers, so completeness cannot be confirmed either way.

Sources

• SEC EDGAR, Form 10-K for fiscal year 2025, filed February 27, 2026, https://www.sec.gov/Archives/edgar/data/799167/000143774926005971/mrtn20251231_10k.htm, retrieved September 9, 2026.
• SEC EDGAR, Form 8-K, filed October 6, 2025, https://www.sec.gov/Archives/edgar/data/799167/000143774925030533/mrtn20251006_8k.htm, retrieved September 9, 2026.