Exhibit 99.1

Marten Transport Announces First Quarter Results

MONDOVI, Wis., April 20, 2017 (GLOBE NEWSWIRE) -- Marten Transport, Ltd. (Nasdaq/GS:MRTN) today reported net income of $8.2 million, or 25 cents per diluted share, for each of the quarters ended March 31, 2017 and March 31, 2016.

Operating revenue improved 6.9% to $173.2 million for the first quarter of 2017 from $161.9 million for the first quarter of 2016. Operating revenue, net of fuel surcharges, improved 3.1% to $156.6 million for the 2017 quarter from $151.9 million for the 2016 quarter. Fuel surcharge revenue increased to $16.6 million for the first quarter of 2017 from $10.0 million for the 2016 quarter.

Operating expenses as a percentage of operating revenue was 92.0% for the first quarter of 2017 and 91.3% for the first quarter of 2016. Operating expenses as a percentage of operating revenue, with both amounts net of fuel surcharges, was 91.1% for the 2017 quarter compared with 90.7% for the 2016 quarter.

Chairman and Chief Executive Officer Randolph L. Marten said, “We are encouraged by our continuing earnings strength and by our organic growth in operating revenue across all four of our business segments, despite the continuing challenge of an unfavorable freight environment. This was also the ninth quarter in a row with year-over-year improvement in operating income for each of our dedicated, intermodal and brokerage segments. These top- and bottom-line results highlight the continued smart and disciplined execution of our unique multifaceted business model by our dedicated and experienced workforce. We are confident in our ability to capitalize profitably on further growth opportunities across all of our business units.”

Marten Transport, with headquarters in Mondovi, Wis., is one of the leading temperature-sensitive truckload carriers in the United States, specializing in transporting and distributing food and other consumer packaged goods that require a temperature-controlled or insulated environment. Marten’s dry freight services are expanding, with 925 dry trailers operating as of March 31, 2017. Marten offers service in the United States, Canada and Mexico, concentrating on expedited movements for high-volume customers. Marten’s common stock is traded on the Nasdaq Global Select Market under the symbol MRTN.

This press release contains certain statements that may be considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. These statements include our discussion of the Company’s prospects for future growth and by their nature involve substantial risks and uncertainties, and actual results may differ materially from those expressed in such forward-looking statements. Important factors known to the Company that could cause actual results to differ materially from those discussed in the forward-looking statements are discussed in Item 1A of the Company’s Annual Report on Form 10-K for the year ended December 31, 2016. The Company undertakes no obligation to correct or update any forward-looking statements, whether as a result of new information, future events or otherwise.

MARTEN TRANSPORT, LTD.

CONSOLIDATED CONDENSED BALANCE SHEETS
(Unaudited)

	March 31,			December 31,
(In thousands, except share information)	2017			2016
ASSETS
Current assets:
Cash and cash equivalents	$	9,065		$	488
Receivables:
Trade, net		69,808			69,199
Other		3,714			4,436
Prepaid expenses and other		17,102			19,307
Total current assets		99,689			93,430
Property and equipment:
Revenue equipment, buildings and land, office equipment and other		768,856			759,553
Accumulated depreciation		(209,226	)		(201,728	)
Net property and equipment		559,630			557,825
Other assets		1,966			2,493
Total assets	$	661,285		$	653,748
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable and accrued liabilities	$	43,981		$	41,230
Insurance and claims accruals		20,582			19,440
Total current liabilities		64,563			60,670
Long-term debt		-			7,886
Deferred income taxes		151,270			147,854
Total liabilities		215,833			216,410
Stockholders’ equity:
Preferred stock, $.01 par value per share; 2,000,000 shares authorized; no shares issued and outstanding		-			-
Common stock, $.01 par value per share; 96,000,000 shares authorized; 32,684,955 shares at March 31, 2017, and 32,634,915 shares at December 31, 2016, issued and outstanding		327			326
Additional paid-in capital		74,891			74,175
Retained earnings		370,234			362,837
Total stockholders’ equity		445,452			437,338
Total liabilities and stockholders’ equity	$	661,285		$	653,748

MARTEN TRANSPORT, LTD.

CONSOLIDATED CONDENSED STATEMENTS OF OPERATIONS

(Unaudited)

	Three Months Ended March 31,
(In thousands, except per share information)	2017			2016
Operating revenue	$	173,159		$	161,929
Operating expenses (income):
Salaries, wages and benefits		56,400			54,830
Purchased transportation		29,362			28,035
Fuel and fuel taxes		25,956			19,630
Supplies and maintenance		10,990			10,499
Depreciation		21,383			20,047
Operating taxes and licenses		2,247			2,185
Insurance and claims		8,914			7,355
Communications and utilities		1,581			1,620
Gain on disposition of revenue equipment		(1,103	)		(1,434	)
Other		3,491			5,037
Total operating expenses		159,221			147,804
Operating income		13,938			14,125
Other		141			215
Income before income taxes		13,797			13,910
Provision for income taxes		5,583			5,717
Net income	$	8,214		$	8,193
Basic earnings per common share	$	0.25		$	0.25
Diluted earnings per common share	$	0.25		$	0.25
Dividends declared per common share	$	0.025		$	0.025

MARTEN TRANSPORT, LTD.
SEGMENT INFORMATION
(Unaudited)

	Three Months Ended March 31,						Dollar Change Three Months Ended March 31,			Percentage Change Three Months Ended March 31,
(Dollars in thousands)	2017			2016			2017 vs. 2016			2017 vs. 2016
Operating revenue:
Truckload revenue, net of fuel surcharge revenue	$	84,811		$	82,942		$	1,869			2.3	%
Truckload fuel surcharge revenue		10,847			7,112			3,735			52.5
Total Truckload revenue		95,658			90,054			5,604			6.2
Dedicated revenue, net of fuel surcharge revenue		36,899			35,510			1,389			3.9
Dedicated fuel surcharge revenue		3,378			1,587			1,791			112.9
Total Dedicated revenue		40,277			37,097			3,180			8.6
Intermodal revenue, net of fuel surcharge revenue		16,811			15,854			957			6.0
Intermodal fuel surcharge revenue		2,375			1,347			1,028			76.3
Total Intermodal revenue		19,186			17,201			1,985			11.5
Brokerage revenue		18,038			17,577			461			2.6
Total operating revenue	$	173,159		$	161,929		$	11,230			6.9	%
Operating income:
Truckload	$	5,974		$	6,940		$	(966	)		(13.9	)%
Dedicated		4,487			4,324			163			3.8
Intermodal		2,149			1,929			220			11.4
Brokerage		1,328			932			396			42.5
Total operating income	$	13,938		$	14,125		$	(187	)		(1.3	)%
Operating ratio:
Truckload		93.8	%		92.3	%
Dedicated		88.9			88.3
Intermodal		88.8			88.8
Brokerage		92.6			94.7
Consolidated operating ratio		92.0	%		91.3	%

MARTEN TRANSPORT, LTD.

OPERATING STATISTICS (Unaudited)

	Three Months Ended March 31,
	2017			2016
Truckload Segment:
Revenue (in thousands)	$	95,658		$	90,054
Average revenue, net of fuel surcharges, per tractor per week(1)	$	3,416		$	3,366
Average tractors(1)		1,931			1,896
Average miles per trip		615			642
Non-revenue miles percentage(2)		9.6	%		9.6	%
Total miles (in thousands)		46,060			44,471
Dedicated Segment:
Revenue (in thousands)	$	40,277		$	37,097
Average revenue, net of fuel surcharges, per tractor per week(1)	$	3,462		$	3,375
Average tractors(1)		829			809
Average miles per trip		299			314
Non-revenue miles percentage(2)		0.7	%		0.8	%
Total miles (in thousands)		18,579			18,521
Intermodal Segment:
Revenue (in thousands)	$	19,186		$	17,201
Loads		9,584			8,696
Average tractors		77			76
Brokerage Segment:
Revenue (in thousands)	$	18,038		$	17,577
Loads		13,354			12,951
At March 31, 2017 and March 31, 2016:
Total tractors(1)		2,827			2,784
Average age of company tractors (in years)		1.5			1.6
Total trailers		4,955			4,725
Average age of company trailers (in years)		2.8			2.7
Ratio of trailers to tractors(1)		1.8			1.7

	Three Months Ended March 31,
(In thousands)	2017			2016
Net cash provided by operating activities	$	37,674		$	55,065
Net cash used for investing activities		(20,962	)		(9,553	)
Net cash used for financing activities		(8,135	)		(44,790	)
Weighted average shares outstanding:
Basic		32,655			32,454
Diluted		32,843			32,639

(1) Includes tractors driven by both company-employed drivers and independent contractors. Independent contractors provided 67 and 79 tractors as of March 31, 2017 and 2016, respectively.

(2) Represents the percentage of miles for which the company is not compensated.