Insider · CIK 0001215888

MCCOLLUM MARK A

Reports to the SEC for 10 companies · HOUSTON, TX

sec.gov

Transactions

Companies

Filings

CIK

0001215888

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-08-14	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+2,184 sh	—	—	2,184
2026-08-08	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+2,168 sh	—	—	11,824
2026-08-08	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−2,168 sh	—	—	2,168
2026-06-03	SDRLSEADRILL Ltd · Restricted Stock UnitsA Award	Director	AAward	+2,618 sh	—	—	2,618
2026-05-20	OKEONEOK INC /NEW/A Award	Director	AAward	+1,845 sh	$92.15	+$170K	2,572
2026-05-14	SDRLSEADRILL Ltd · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−4,860 sh	—	—	0
2026-05-14	SDRLSEADRILL LtdM Exercise/Conversion	Director	MExercise/Conversion	+4,860 sh	—	—	7,269
2026-01-23	OKEONEOK INC /NEW/A Award	Director	AAward	+727 sh	$78.00	+$56.7K	727
2025-08-09	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,128 sh	—	—	9,656
2025-08-09	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−1,128 sh	—	—	0
2025-08-08	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+2,168 sh	—	—	2,168
2025-05-14	SDRLSEADRILL Ltd · Restricted Stock UnitsA Award	Director	AAward	+4,860 sh	—	—	4,860
2025-04-17	SDRLSEADRILL LtdM Exercise/Conversion	Director	MExercise/Conversion	+2,409 sh	—	—	2,409
2025-04-17	SDRLSEADRILL Ltd · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−2,409 sh	—	—	0
2024-11-22	MARATHON OIL CORPD Disposition to Issuer	Director	DDisposition to Issuer	−8,130 sh	—	—	0
2024-11-22	MARATHON OIL CORPD Disposition to Issuer	Director	DDisposition to Issuer	−8,169 sh	—	—	0
2024-08-11	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−1,136 sh	—	—	0
2024-08-11	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,136 sh	—	—	8,528
2024-08-09	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+1,128 sh	—	—	1,128
2024-03-01	MARATHON OIL CORPA Award	Director	AAward	+8,130 sh	—	—	16,299
2023-08-12	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−1,446 sh	—	—	0
2023-08-12	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,446 sh	—	—	7,392
2023-08-11	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+1,136 sh	—	—	1,136
2023-03-01	MARATHON OIL CORPA Award	Director	AAward	+7,754 sh	—	—	8,169
2022-12-01	MARATHON OIL CORPA Award	Director	AAward	+415 sh	—	—	415
2022-08-13	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−1,763 sh	—	—	0
2022-08-13	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,763 sh	—	—	5,946
2022-08-12	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+1,446 sh	—	—	1,446
2022-03-03	WLKWESTLAKE CORPG Gift	Director	GGift	−3,000 sh	—	—	4,183
2021-08-14	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−2,400 sh	—	—	0
2021-08-14	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+2,400 sh	—	—	7,183
2021-08-13	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+1,763 sh	—	—	1,763
2020-08-16	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−2,387 sh	—	—	0
2020-08-16	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+2,387 sh	—	—	4,783
2020-08-14	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+2,400 sh	—	—	2,400
2019-12-13	WFRDWeatherford International plcF Tax Payment	Director, President and CEO	FTax Payment	−402K sh	$0.02	−$6,266.801	1,263,897
2019-12-13	WFRDWeatherford International plcF Tax Payment	Director, President and CEO	FTax Payment	−809K sh	$0.02	−$12.6K	2,511,573
2019-12-13	WFRDWeatherford International plcA Award	Director, President and CEO	AAward	+2.06M sh	$0.02	+$32.1K	3,321,071
2019-12-13	WFRDWeatherford International plcD Disposition to Issuer	Director, President and CEO	DDisposition to Issuer	−2.51M sh	—	—	0
2019-12-13	WFRDWeatherford International plcA Award	Director, President and CEO	AAward	+1,741 sh	—	—	1,741
2019-12-13	WFRDWeatherford International plc · Warrants (right to buy)A Award	Director, President and CEO	AAward	+19.4K sh	—	—	19,350
2019-08-17	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+1,409 sh	—	—	2,396
2019-08-17	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−1,409 sh	—	—	0
2019-08-16	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+2,387 sh	—	—	2,387
2019-05-18	WLKWESTLAKE CORPM Exercise/Conversion	Director	MExercise/Conversion	+987 sh	—	—	987
2019-05-18	WLKWESTLAKE CORP · Restricted Stock UnitsM Exercise/Conversion	Director	MExercise/Conversion	−987 sh	—	—	0
2019-04-24	WFRDWeatherford International plcF Tax Payment	Director, President and CEO	FTax Payment	−71.9K sh	$0.63	−$45.3K	1,719,569
2019-04-24	WFRDWeatherford International plcF Tax Payment	Director, President and CEO	FTax Payment	−54K sh	$0.63	−$34K	1,665,615
2019-01-31	WFRDWeatherford International plcF Tax Payment	Director, President and CEO	FTax Payment	−73.3K sh	$0.64	−$46.9K	1,791,507
2018-08-17	WLKWESTLAKE CORP · Restricted Stock UnitsA Award	Director	AAward	+1,409 sh	—	—	1,409

Recent filings

Accepted (ET)
Aug 174
MCCOLLUM MARK A0001193125-26-353628
SEC(opens sec.gov)
Aug 104
MCCOLLUM MARK A0001193125-26-342006
SEC(opens sec.gov)
Jun 54
MCCOLLUM MARK A0001193125-26-258868
SEC(opens sec.gov)
May 224
MCCOLLUM MARK A0001215888-26-000006
SEC(opens sec.gov)
May 184
MCCOLLUM MARK A0001193125-26-228262
SEC(opens sec.gov)
Jan 274
MCCOLLUM MARK A0001215888-26-000004
SEC(opens sec.gov)
Aug 114
MCCOLLUM MARK A0001215888-25-000005
SEC(opens sec.gov)
May 164
MCCOLLUM MARK A0000950170-25-073192
SEC(opens sec.gov)
Apr 214
MCCOLLUM MARK A0000950170-25-056133
SEC(opens sec.gov)
Nov 224
MCCOLLUM MARK A0000950170-24-130182
SEC(opens sec.gov)
Aug 124
MCCOLLUM MARK A0000950170-24-095193
SEC(opens sec.gov)
Mar 54
MCCOLLUM MARK A0000101778-24-000049
SEC(opens sec.gov)

Companies

Address

2801 POST OAK BLVD., STE. 600

HOUSTON, TX, 77056