Lydall (LDL) 8-K Recast (Unaudited) Quarterly and Full Year Segment Information

Exhibit 99.1

RECAST (UNAUDITED) QUARTERLY AND FULL YEAR SEGMENT INFORMATION

FOR 2017 AND 2016

Effective January 1, 2018, the Company changed its segment reporting by combining its Thermal/Acoustical Metals and Thermal/Acoustical Fibers segments into a single operating segment named Thermal Acoustical Solutions. The Company’s other reportable segments, Technical Nonwovens and Performance Materials, remain unchanged.

The following unaudited historical quarterly and full-year financial data for 2017 and 2016 has been recast (unaudited) to reflect this new Thermal Acoustical Solutions segment reporting structure.

Recast of Segment Financial Data – Thermal Acoustical Solutions

In thousands of dollars	Q1-2017			Q2-2017			Q3-2017			Q4-2017			FY-2017			Q1-2016			Q2-2016			Q3-2016			Q4-2016			FY-2016
Thermal/Acoustical Metals (Reported)
Parts sales	$	41,694		$	40,827		$	41,522		$	44,952		$	168,995		$	36,783		$	41,053		$	39,807		$	38,544		$	156,187
Tooling sales		2,586			2,558			8,297			6,110			19,551			5,214			4,192			4,830			4,551			18,787
Total sales		44,280			43,385			49,819			51,062			188,546			41,997			45,245			44,637			43,095			174,974
Operating income	$	2,443		$	3,174		$	1,836		$	2,619		$	10,072		$	3,557		$	4,082		$	5,451		$	(1,528	)	$	11,562
Operating margin		5.5	%		7.3	%		3.7	%		5.1	%		5.3	%		8.5	%		9.0	%		12.2	%		-3.5	%		6.6	%
Thermal/Acoustical Fibers (Reported)
Parts sales	$	40,987		$	40,704		$	34,739		$	36,994		$	153,424		$	35,677		$	36,934		$	35,073		$	36,661		$	144,345
Tooling sales		385			2,795			884			273			4,337			184			3,234			1,356			293			5,067
Total sales		41,372			43,499			35,623			37,267			157,761			35,861			40,168			36,429			36,954			149,412
Operating income	$	12,289		$	12,157		$	8,716		$	9,708		$	42,870		$	10,324		$	10,630		$	10,026		$	10,472		$	41,452
Operating margin		29.7	%		27.9	%		24.5	%		26.0	%		27.2	%		28.8	%		26.5	%		27.5	%		28.3	%		27.7	%
Thermal Acoustical Solutions (Recast) (unaudited)
Parts sales	$	81,814		$	80,648		$	75,195		$	80,559		$	318,216		$	71,840		$	77,278		$	74,339		$	74,559		$	298,016
Tooling sales		2,971			5,354			9,180			6,383			23,888			5,398			7,426			5,628			4,724			23,176
Total sales		84,785			86,002			84,375			86,942			342,104			77,238			84,704			79,967			79,283			321,192
Operating income	$	14,734		$	15,326		$	10,553		$	12,264		$	52,877		$	13,790		$	14,609		$	15,463		$	8,994		$	52,856
Operating margin		17.4	%		17.8	%		12.5	%		14.1	%		15.5	%		17.9	%		17.2	%		19.3	%		11.3	%		16.5	%

Non-GAAP Measures

The following table reconciles the non-GAAP measures to the most directly comparable GAAP measures:

In thousands of dollars	Q1-2017			Q2-2017			Q3-2017			Q4-2017			FY-2017			Q1-2016			Q2-2016			Q3-2016			Q4-2016			FY-2016
Thermal Acoustical Solutions (Recast) (unaudited)
Operating income, as recasted	$	14,734		$	15,326		$	10,553		$	12,264		$	52,877		$	13,790		$	14,609		$	15,463		$	8,994		$	52,856
German Cartel settlement		-			-			-			-			-			-			-			-			3,479			3,479
Automotive segments consolidation expenses		-			-			1,089			277			1,366			-			-			-			-			-
Severance expenses		714			-			-			-			714			-			-			-			-			-
Operating income, adjusted	$	15,448		$	15,326		$	11,642		$	12,541		$	54,957		$	13,790		$	14,609		$	15,463		$	12,473		$	56,335
Operating margin, as recasted		17.4	%		17.8	%		12.5	%		14.1	%		15.5	%		17.9	%		17.2	%		19.3	%		11.3	%		16.5	%
Operating margin, adjusted		18.2	%		17.8	%		13.8	%		14.4	%		16.1	%		17.9	%		17.2	%		19.3	%		15.7	%		17.5	%