Michael A Lewis

Michael A Lewis serves as director at NPK International Inc. (NPKI). This page tracks their complete SEC Form 4 insider trading history including stock purchases and sales.

Total Buys

1 trades

$20.9K

Total Sells

6 trades

$199.5K

Net Position

Net Seller

$178.6K

Companies Traded

2

NPKI, POR

Active Period

Dec 2022 – May 2026

7 total trades

Most Recent

Sell NPKI

May 19, 2026 · $30.8K

Michael A Lewis's Insider Trading at NPK International Inc. (NPKI)

Buys

1 · $20.9K

Sells

5 · $121.9K

Total Shares Bought

5,251

Total Shares Sold

10,065

NPKI Price Chart

Loading chart...

Date	Type	Shares	Avg Price	Value	Shares After
May 19, 2026	Sell	2,013	$15.30	$30.8K	129,320
Feb 25, 2026	Sell	2,013	$14.31	$28.8K	131,333
Nov 24, 2025	Sell	2,013	$12.00	$24.2K	0
Aug 25, 2025	Sell	2,013	$10.33	$20.8K	0
Jun 16, 2025	Sell	2,013	$8.60	$17.3K	0
Dec 12, 2022	Buy	5,251	$3.98	$20.9K	76,046

Michael A Lewis's Insider Trading at Portland General Electric Company (POR)

Buys

0 · $0.00

Sells

1 · $77.7K

Total Shares Bought

0

Total Shares Sold

1,937

POR Price Chart

Loading chart...

Date	Type	Shares	Avg Price	Value	Shares After
Jul 22, 2025	Sell	1,937	$40.10	$77.7K	13,509

Related Insiders

Lori Briggs

VP & President, Ind. Solutions

NPKISell · Jun 9, 2026

LANIGAN MATTHEW

President & CEO

NPKISell · Jun 5, 2026

John Carter McFarland

Vice President

PORSell · May 12, 2026

Juan Diego Gallegos

VP, CHRO

PORSell · May 12, 2026

HOGLUND ROBERT N

director

PORBuy · May 12, 2026

Maria Angelica Espinosa

SVP, CLO, CCA & CC Officer

PORSell · May 8, 2026

Joseph R Trpik JR

SVP, Finance CFO

PORSell · May 8, 2026

Gregg Piontek

officer: Senior Vice President and CFO

NPKISell · Apr 10, 2026

Explore More Insider Trading Data

NPKI Insider Trading Activity

View all insider trades at NPK International Inc.

Energy Sector Insider Trades

See insider activity across energy stocks

Latest Insider Buys

Most recent insider purchases across all stocks

CEO Stock Purchases

Track CEO buying activity