Mark C. Thurmond

EVP, Worldwide Sales and Serv., QLIK TECHNOLOGIES INC.

Companies

Tenable Network SecurityBoard member May 27, 2025 to now¹
Tenable Network SecurityChief executive officer Feb 18, 2025 to now²
Tenable Network SecurityChief operating officer Nov 14, 2022 to now³

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Recent filings

Aug 24, 2026Shares withheld for tax 2,112 shares at $33.94 of CIK 1660280⁴
Aug 24, 2026Exercised options 4,368 shares of CIK 1660280⁴
Aug 24, 2026Shares withheld for tax 3,754 shares at $33.94 of CIK 1660280⁴
Aug 24, 2026Exercised options 7,764 shares of CIK 1660280⁴
Aug 24, 2026Shares withheld for tax 1,796 shares at $33.94 of CIK 1660280⁴
Aug 24, 2026Exercised options 3,713 shares of CIK 1660280⁴
Aug 24, 2026Shares withheld for tax 2,947 shares at $33.94 of CIK 1660280⁴
Aug 24, 2026Exercised options 6,095 shares of CIK 1660280⁴
Aug 24, 2026Shares withheld for tax 1,097 shares at $33.94 of CIK 1660280⁴
Aug 24, 2026Exercised options 2,267 shares of CIK 1660280⁴
Aug 24, 2026Shares withheld for tax 562 shares at $33.94 of CIK 1660280⁴
Aug 24, 2026Exercised options 1,162 shares of CIK 1660280⁴
May 22, 2026Shares withheld for tax 2,112 shares at $25.45 of CIK 1660280⁵
May 22, 2026Exercised options 4,368 shares of CIK 1660280⁵
May 22, 2026Shares withheld for tax 3,754 shares at $25.45 of CIK 1660280⁵
May 22, 2026Exercised options 7,764 shares of CIK 1660280⁵
May 22, 2026Shares withheld for tax 1,796 shares at $25.45 of CIK 1660280⁵
May 22, 2026Exercised options 3,713 shares of CIK 1660280⁵
May 22, 2026Shares withheld for tax 2,947 shares at $25.45 of CIK 1660280⁵
May 22, 2026Exercised options 6,095 shares of CIK 1660280⁵
May 22, 2026Shares withheld for tax 1,097 shares at $25.45 of CIK 1660280⁵
May 22, 2026Exercised options 2,267 shares of CIK 1660280⁵
May 22, 2026Shares withheld for tax 562 shares at $25.45 of CIK 1660280⁵
May 22, 2026Exercised options 1,162 shares of CIK 1660280⁵
Feb 25, 2026Shares withheld for tax 11,789 shares at $19.00 of CIK 1660280⁶

Sources

The numbers on this page point here. Each one links to the record it came from.

1
SEC EDGARTenable Network Security, Board member
2
SEC EDGARTenable Network Security, Chief executive officer
3
SEC EDGARTenable Network Security, Chief operating officer
4
SEC EDGARForm 4 filed Aug 25, 2026
5
SEC EDGARForm 4 filed May 26, 2026
6
SEC EDGARForm 4 filed Feb 27, 2026