THURMOND MARK C.

PrivateCIK: 1651579
Location

COLUMBIA, MD

THURMOND MARK C. (Co-Chief Executive Officer) exercised options at TENABLE HOLDINGS, INC.

Option exercise — a mechanical event triggered by vesting or expiry. Not a discretionary conviction trade.

M · 6 exercises
InsiderTHURMOND MARK C.CIK 1651579
IssuerTENABLE HOLDINGS, INC.CIK 1660280
DirectorOfficer· Co-Chief Executive Officer
Since Feb 2026
-12.27K
Net shares
Net seller
$416.4K
Total sold
0
Open market trades
0B · 0S
18
Total transactions
25.37K acquired · 37.64K disposed
Non-Derivative Transactions12

Common Stock

Direct
M · Option Exercise

Shares

+1.16K

Price / share

Trade value

% of position

0.6%
8/24/2026
182.19K183.35K

Common Stock

Direct
F · Tax Withholding

Shares

562.00

Price / share

$33.94

Trade value

$19.07K

% of position

0.3%
8/24/2026
183.35K182.79K

Common Stock

Direct
M · Option Exercise

Shares

+2.27K

Price / share

Trade value

% of position

1.2%
8/24/2026
182.79K185.06K

Common Stock

Direct
F · Tax Withholding

Shares

1.10K

Price / share

$33.94

Trade value

$37.23K

% of position

0.6%
8/24/2026
185.06K183.96K

Common Stock

Direct
M · Option Exercise

Shares

+6.09K

Price / share

Trade value

% of position

3.3%
8/24/2026
183.96K190.05K

Common Stock

Direct
F · Tax Withholding

Shares

2.95K

Price / share

$33.94

Trade value

$100.02K

% of position

1.6%
8/24/2026
190.05K187.11K

Common Stock

Direct
M · Option Exercise

Shares

+3.71K

Price / share

Trade value

% of position

2.0%
8/24/2026
187.11K190.82K

Common Stock

Direct
F · Tax Withholding

Shares

1.80K

Price / share

$33.94

Trade value

$60.96K

% of position

0.9%
8/24/2026
190.82K189.02K

Common Stock

Direct
M · Option Exercise

Shares

+7.76K

Price / share

Trade value

% of position

4.1%
8/24/2026
189.02K196.79K

Common Stock

Direct
F · Tax Withholding

Shares

3.75K

Price / share

$33.94

Trade value

$127.41K

% of position

1.9%
8/24/2026
196.79K193.03K

Common Stock

Direct
M · Option Exercise

Shares

+4.37K

Price / share

Trade value

% of position

2.3%
8/24/2026
193.03K197.40K

Common Stock

Direct
F · Tax Withholding

Shares

2.11K

Price / share

$33.94

Trade value

$71.68K

% of position

1.1%
8/24/2026
197.40K195.29K
Total

Net shares

+13.10K

Net value

-$416.38K

Derivative Transactions6

Performance Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

1.16K shares

Shares

1.16K

Strike price

Held after

2.33K

Exercisable

8/24/2026

Performance Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

2.27K shares

Shares

2.27K

Strike price

Held after

13.61K

Exercisable

8/24/2026

Performance Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

6.09K shares

Shares

6.09K

Strike price

Held after

60.96K

Exercisable

8/24/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

3.71K shares

Shares

3.71K

Strike price

Held after

7.43K

Exercisable

8/24/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

7.76K shares

Shares

7.76K

Strike price

Held after

77.64K

Exercisable

8/24/2026

Restricted Stock Units

Direct
M · Option Exercise
Converts to

Common Stock

4.37K shares

Shares

4.37K

Strike price

Held after

26.21K

Exercisable

8/24/2026