Nuance Investments (MRTN) reports sole voting power over 3.97M shares (4.9%)

Rhea-AI Filing Summary

Marten Transport Ltd ownership filing: Nuance Investments LLC reports sole voting power over 3,968,604 shares, representing 4.9% of the outstanding common stock. The filer states amount beneficially owned: 0 shares. The filing is an amendment signed on 07/06/2026.

Insights

Institutional Ownership Analyst

Nuance reports voting control without beneficial ownership at a 4.9% stake.

Nuance Investments LLC lists sole voting power over 3,968,604 shares and a 4.9% position. The filing also states amount beneficially owned: 0 shares, indicating a distinction between voting power and economic ownership in this disclosure.

The filing is an amendment signed 07/06/2026. Future filings may clarify the arrangement that separates voting authority from beneficial ownership.

Key Figures

Sole voting power: 3,968,604 shares Percent of class: 4.9% Amount beneficially owned: 0 shares +1 more

4 metrics

Sole voting power 3,968,604 shares reported in Item 4(i)

Percent of class 4.9% percent of common stock reported in Item 4(b)

Amount beneficially owned 0 shares reported in Item 4(a)

Filing signature date 07/06/2026 signature block date

Key Terms

Schedule 13G/A, Sole Voting Power, Beneficially owned

3 terms

Schedule 13G/A regulatory

"Amendment No. 3) MARTEN TRANSPORT LTD ... SCHEDULE 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Sole Voting Power financial

"Sole Voting Power 3,968,604.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Beneficially owned financial

"Amount beneficially owned: 0"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 07/06/2026 - 01:22 PM Accepted by SEC EDGAR 07/06/2026 - 01:22 PM Learn about SEC filing dates

FAQ

What does Nuance Investments' Schedule 13G/A for MRTN disclose?

It discloses Nuance's sole voting power over 3,968,604 shares representing 4.9% of common stock. The amendment also states amount beneficially owned: 0 shares, and was signed on 07/06/2026.

Does Nuance Investments beneficially own the shares it can vote for MRTN?

No. The filing lists amount beneficially owned: 0 shares while reporting sole voting power over 3,968,604 shares. That shows voting authority is reported separately from economic beneficial ownership.

What percentage of Marten Transport's common stock does Nuance report?

Nuance reports a 4.9% position of the common class. The filing pairs this 4.9% figure with the sole voting power number of 3,968,604 shares.

When was the Schedule 13G/A amendment signed for Nuance Investments at MRTN?

The amendment is signed by the Chief Compliance Officer on 07/06/2026. That date appears on the signature block and anchors this amended disclosure.

Who signed the filing for Nuance Investments regarding MRTN?

The filing is signed by Kimberly McEnaney, identified as Chief Compliance Officer. The signature block includes the date 07/06/2026.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

MARTEN TRANSPORT LTD

(Name of Issuer)

COMMON

(Title of Class of Securities)

573075108

(CUSIP Number)

04/10/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 573075108

1

Names of Reporting Persons

Nuance Investments LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

KANSAS

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 3,968,604.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.9 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: MARTEN TRANSPORT LTD
(b)	Address of issuer's principal executive offices: 129 Marten Street, Mondovi, WISCONSIN 54755
Item 2.
(a)	Name of person filing: Nuance Investments LLC
(b)	Address or principal business office or, if none, residence: 4900 Main Street Suite 220 Kansas City, Missouri 64112
(c)	Citizenship: Nuance Investments LLC - KANSAS
(d)	Title of class of securities: COMMON
(e)	CUSIP No.: 573075108
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 0
(b)	Percent of class: 4.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: Nuance Investments LLC - 3,968,604
	(ii) Shared power to vote or to direct the vote: Nuance Investments LLC - 0
	(iii) Sole power to dispose or to direct the disposition of: Nuance Investments LLC - 0
	(iv) Shared power to dispose or to direct the disposition of: Nuance Investments LLC - 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Nuance Investments LLC

Signature:	Kimberly McEnaney
Name/Title:	Chief Compliance Officer
Date:	07/06/2026