NL INDS INC

Ticker: NL CUSIP: 629156407 Class: Common Stock

Parallax Volatility Advisers, L.P.'s Holding History (CIK: 0001521001)

Note: Option positions (PUT/CALL) are excluded.

Q4 2018

Shares 7,559 Value ($000) $27 Avg Close $3.28 Range $1.98 - $4.59

Q3 2018

Shares 7,273 Value ($000) $44 Avg Close $5.35 Range $3.96 - $6.38

Q2 2018

Shares 6,181 Value ($000) $54 Avg Close $5.77 Range $4.74 - $6.72

Q1 2018

Shares 6,744 Value ($000) $53 Avg Close $7.02 Range $5.07 - $9.94

Q4 2017

Shares 5,065 Value ($000) $72 Avg Close $8.53 Range $6.13 - $10.78

Q3 2017

Shares 812 Value ($000) $7 Avg Close $5.16 Range $4.60 - $6.38

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2018	7,559	$27	$3.28	$1.98 - $4.59
Q3 2018	7,273	$44	$5.35	$3.96 - $6.38
Q2 2018	6,181	$54	$5.77	$4.74 - $6.72
Q1 2018	6,744	$53	$7.02	$5.07 - $9.94
Q4 2017	5,065	$72	$8.53	$6.13 - $10.78
Q3 2017	812	$7	$5.16	$4.60 - $6.38