Form
4
insider filings, from the source
Buys
Significant
Penny
Sales
Options
Clusters
Screener
Ratios
Learn
/
Insider · CIK 0001194888
Corbin J Robertson Jr.
Files at:
KLXE
,
NRP
,
QES
.
On EDGAR ↗
Period
1M
3M
6M
1Y
2Y
All data
shares as filed — not split-adjusted
Open-market buys & sales
buys $2.0M · 1
sales $0 · 0
net $2.0M
$10k
$10k
$100k
$100k
$1M
$1M
$10M
$10M
buys
sales
Feb 12
Feb 12
Feb 12
Feb 13
Feb 13
Feb 13
Feb 14
Reported trades — common stock
Trade
Reported (ET)
Company
Shares
Avg price
Total
Owned after
Δ stake
Flags
Sep 16, 2026
M
Form 4 →
Sep 17, 4:10 pm EDT
KLX Energy Services Holdings, Inc.
KLXE
38,694
$1.49
$57,654
48,654
—
Sep 14, 2026
M
Form 4 →
Sep 15, 4:56 pm EDT
KLX Energy Services Holdings, Inc.
KLXE
225,353
$1.49
$335,776
283,359
—
Feb 11, 2019
D
M
Form 4 →
Feb 12, 4:19 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
7,200
$38.22
$137,592
6
—
plan?
Feb 13, 2018
A
M
P
Form 4 →
Feb 12, 2019, 6:06 pm EST
Quintana Energy Services Inc.
QES
11,429
—
—
100,000
—
plan?
late
Feb 13, 2018
P
Form 4 →
Feb 15, 8:04 pm EST
Quintana Energy Services Inc.
QES
200,000
$10.00
$2,000,000
100,000
—
plan?
Feb 13, 2018
A
D
Form 4 →
Feb 15, 8:04 pm EST
Quintana Energy Services Inc.
QES
9,358,390
—
—
2,886,041
—
plan?
Feb 12, 2018
D
M
Form 4 →
Feb 14, 5:11 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
6,720
$31.69
$106,470
6
—
plan?
Feb 13, 2017
D
M
Form 4 →
Feb 15, 7:28 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
6,400
$36.54
$116,920
0
—
plan?
Feb 14, 2016
D
M
Form 4 →
Feb 17, 6:11 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
64,000
$1.03
$33,088
1,276,727
—
plan?
Feb 10, 2015
D
M
Form 4 →
Feb 12, 5:21 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
66,000
$8.95
$295,367
1,276,727
—
plan?
Reported trades — derivatives (options, RSUs, warrants)
Trade
Reported (ET)
Company
Shares
Avg price
Total
Owned after
Δ stake
Flags
Sep 16, 2026
M
Form 4 →
Sep 17, 4:10 pm EDT
KLX Energy Services Holdings, Inc.
KLXE
9,960
—
—
0
—
Sep 14, 2026
M
Form 4 →
Sep 15, 4:56 pm EDT
KLX Energy Services Holdings, Inc.
KLXE
58,006
—
—
0
—
Feb 14, 2019
A
Form 4 →
Feb 19, 4:34 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
31,498
—
—
31,498
—
Feb 11, 2019
M
Form 4 →
Feb 12, 4:19 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
3,600
—
—
0
—
Feb 9, 2019
M
Form 4 →
Feb 12, 6:06 pm EST
Quintana Energy Services Inc.
QES
11,429
—
—
0
—
Jan 24, 2019
A
Form 4 →
Jan 28, 5:42 pm EST
Quintana Energy Services Inc.
QES
23,474
—
—
23,474
—
Apr 18, 2018
A
Form 4 →
Apr 20, 4:40 pm EDT
Quintana Energy Services Inc.
QES
11,429
—
—
11,429
—
Feb 12, 2018
A
M
Form 4 →
Feb 14, 5:11 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
17,753
—
—
14,393
—
Feb 13, 2017
M
Form 4 →
Feb 15, 7:28 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
3,200
—
—
0
—
Feb 14, 2016
M
Form 4 →
Feb 17, 6:11 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
32,000
—
—
0
—
Feb 10, 2015
A
M
Form 4 →
Feb 12, 5:21 pm EST
NATURAL RESOURCE PARTNERS LP
NRP
69,000
—
—
36,000
—