WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC

Holdings History for NPK International Inc. - COM PAR $.01NEW (NR)

Symbol: NR on NYSE
Investment type: Equity - Shares of Stock
Class: COM PAR $.01NEW

Shares, Excluding Options vs Price

Value, Excluding Options

Holdings date	Weight	Change	Value $	Shares	Change	Activity %	Price	All Holders
3/31/2020		-0.03%	$0	0	-1,018,926	-100%		Q1 2020
12/31/2019	0.03%	-0.01%	$6.39M	1.02M	-416,765	-29%	$6.27	Q4 2019
9/30/2019	0.05%	0%	$10.9M	1.44M	-9,296	-0.64%	$7.62	Q3 2019
6/30/2019	0.04%	0%	$10.7M	1.44M	-51,768	-3.46%	$7.42	Q2 2019
3/31/2019	0.06%	0%	$13.7M	1.5M	-61,842	-3.97%	$9.16	Q1 2019
12/31/2018	0.05%	+0%	$10.7M	1.56M	+23,249	+1.51%	$6.87	Q4 2018
9/30/2018	0.06%	+0.01%	$15.9M	1.54M	+143,541	+10.3%	$10.35	Q3 2018
6/30/2018	0.06%	0%	$15.1M	1.39M	-41,929	-2.92%	$10.85	Q2 2018
3/31/2018	0.04%	0%	$11.6M	1.43M	-48,270	-3.26%	$8.10	Q1 2018
12/31/2017	0.05%	0%	$12.7M	1.48M	-21,719	-1.44%	$8.60	Q4 2017
9/30/2017	0.05%	+0.03%	$15M	1.5M	+821,630	+120%	$10.00	Q3 2017
6/30/2017	0.02%	+0.02%	$5.01M	682K	+682,095	NEW	$7.35	Q2 2017

* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.