Insider · CIK 0001651579

Thurmond Mark C.

Reports to the SEC for 2 companies · COLUMBIA, MD

sec.gov

Transactions

Companies

Filings

CIK

0001651579

Forms 4 and 5

Insider transactions

50 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-08-24	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+1,162 sh	—	—	183,350
2026-08-24	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−562 sh	$33.94	−$19.1K	182,788
2026-08-24	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+2,267 sh	—	—	185,055
2026-08-24	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−1,097 sh	$33.94	−$37.2K	183,958
2026-08-24	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+6,095 sh	—	—	190,053
2026-08-24	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−2,947 sh	$33.94	−$100K	187,106
2026-08-24	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+3,713 sh	—	—	190,819
2026-08-24	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−1,796 sh	$33.94	−$61K	189,023
2026-08-24	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+7,764 sh	—	—	196,787
2026-08-24	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−3,754 sh	$33.94	−$127K	193,033
2026-08-24	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+4,368 sh	—	—	197,401
2026-08-24	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−2,112 sh	$33.94	−$71.7K	195,289
2026-08-24	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−1,162 sh	—	—	2,330
2026-08-24	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−2,267 sh	—	—	13,606
2026-08-24	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−6,095 sh	—	—	60,957
2026-08-24	TENBTenable Holdings, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−3,713 sh	—	—	7,426
2026-08-24	TENBTenable Holdings, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−7,764 sh	—	—	77,644
2026-08-24	TENBTenable Holdings, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−4,368 sh	—	—	26,208
2026-05-22	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+1,162 sh	—	—	170,249
2026-05-22	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−562 sh	$25.45	−$14.3K	169,687
2026-05-22	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+2,267 sh	—	—	171,954
2026-05-22	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−1,097 sh	$25.45	−$27.9K	170,857
2026-05-22	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+6,095 sh	—	—	176,952
2026-05-22	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−2,947 sh	$25.45	−$75K	174,005
2026-05-22	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+3,713 sh	—	—	177,718
2026-05-22	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−1,796 sh	$25.45	−$45.7K	175,922
2026-05-22	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+7,764 sh	—	—	183,686
2026-05-22	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−3,754 sh	$25.45	−$95.5K	179,932
2026-05-22	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+4,368 sh	—	—	184,300
2026-05-22	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−2,112 sh	$25.45	−$53.8K	182,188
2026-05-22	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−1,162 sh	—	—	3,492
2026-05-22	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−2,267 sh	—	—	15,873
2026-05-22	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−6,095 sh	—	—	67,052
2026-05-22	TENBTenable Holdings, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−3,713 sh	—	—	11,139
2026-05-22	TENBTenable Holdings, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−7,764 sh	—	—	85,408
2026-05-22	TENBTenable Holdings, Inc. · Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−4,368 sh	—	—	30,576
2026-02-26	TENBTenable Holdings, Inc. · Restricted Stock UnitsA Award	Director, Co-Chief Executive Officer	AAward	+342K sh	—	—	341,847
2026-02-25	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+24.4K sh	—	—	180,056
2026-02-25	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−11.8K sh	$19.00	−$224K	168,267
2026-02-25	TENBTenable Holdings, Inc. · Performance Restricted Stock UnitsM Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	−24.4K sh	—	—	73,147
2026-02-23	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+1,365 sh	—	—	115,004
2026-02-23	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−401 sh	$17.55	−$7,037.55	114,603
2026-02-23	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+1,162 sh	—	—	115,765
2026-02-23	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−342 sh	$17.55	−$6,002.1	115,423
2026-02-23	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+2,267 sh	—	—	117,690
2026-02-23	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−666 sh	$17.55	−$11.7K	117,024
2026-02-23	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+3,857 sh	—	—	120,881
2026-02-23	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−1,865 sh	$17.55	−$32.7K	119,016
2026-02-23	TENBTenable Holdings, Inc.M Exercise/Conversion	Director, Co-Chief Executive Officer	MExercise/Conversion	+3,713 sh	—	—	122,729
2026-02-23	TENBTenable Holdings, Inc.F Tax Payment	Director, Co-Chief Executive Officer	FTax Payment	−1,090 sh	$17.55	−$19.1K	121,639

Recent filings

Accepted (ET)
Aug 254
Thurmond Mark C.0001651579-26-000008
SEC(opens sec.gov)
May 264
Thurmond Mark C.0001651579-26-000006
SEC(opens sec.gov)

Companies

Address

C/O TENABLE HOLDINGS, INC. 6100 MERRIWEATHER DRIVE

COLUMBIA, MD, 21044