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Thurmond Mark C.

Co-Chief Executive Officer at TENB

CIK 0001651579 · All filings on EDGAR ↗

6Buy txns

12Sell txns

+$0Reported buys

−$416kReported sells

0Cluster events

cumulative reported $ across trade dates, 2026-08-24 → 2026-08-24

Sectors: Information Technology

Career transactions in this dataset

Filing date	Trade date	Ticker	Insider	Type	Shares	Price	Value	Cluster
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	1,162	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	F routine	562	$33.94	−$19k	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	2,267	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	F routine	1,097	$33.94	−$37k	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	6,095	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	F routine	2,947	$33.94	−$100k	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	3,713	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	F routine	1,796	$33.94	−$61k	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	7,764	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	F routine	3,754	$33.94	−$127k	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	4,368	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	F routine	2,112	$33.94	−$72k	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	1,162	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	2,267	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	6,095	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	3,713	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	7,764	—	—	—
2026-08-25	2026-08-24	TENB	Thurmond Mark C. Co-Chief Executive Officer	M routine	4,368	—	—	—

Known data limitations

Form 4 lag: insiders have 2 business days to file after a trade (weekends and holidays extend this), and this site re-ingests once daily — a transaction can appear here roughly three business days after it happened.
13F lag: quarterly 13F-HR holdings cover the prior quarter-end and are due 45 days after it — every institutional position shown here is at least 45 days old by construction, often more.
CUSIP→ticker gaps: 13F positions are reported by CUSIP; some holdings cannot be matched to a current ticker (delistings, corporate actions, thin metadata) and appear without one or are omitted from ticker-level views.
EDGAR timing variability: institutions file at different hours and days within their windows; amended filings (4/A, 13F-HR/A) can restate earlier periods, so historical aggregates may change between batches.

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