TENB
TENABLE HLDGS (TENB)
NASDAQ
$36.86+$0.75 (+2.08%)
Price as of Oct 02, 2026 4:00 PM EDT
  • $4.0B
    Market Cap
  • 22.32%
    1-Year Change
  • Software - Infrastructure
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
13.99%
15.4M
+465,039 (+3.01%)
Dec 31, 2025
AMERIPRISE FINANCIAL INC
13.81%
15.2M
+6.7M (+44.18%)
Jun 30, 2026
BLACKROCK, INC.
12.25%
13.5M
+16,358 (+0.12%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
10.81%
11.9M
+829,503 (+6.96%)
Dec 31, 2024
BLACKROCK INC.
9.63%
10.6M
+230,170 (+2.17%)
Jun 30, 2024
N/A
9.28%
10.2M
+603,124 (+5.89%)
Jun 30, 2026
VANGUARD PORTFOLIO MANAGEMENT LLC
9.28%
10.2M
+603,124 (+5.89%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions2.0B (75.34%)
  • Mutual Funds656.2M (24.54%)
  • Insiders3.4M (0.13%)
  • Other0 (0.00%)

Insider Transactions

  • 0.13% (3.4M)
    Current InsiderOwnership (%, shares)
  • 2
    Number of InsiderBuying (last 12 months)
  • $1.1M
    Amount of InsiderBuying (last 12 months)
  • 4
    Number of InsiderSelling (last 12 months)
  • $6.6M
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Anschutz Barron
Exempt
Aug 24, 2026
$0.00
1,337
$0.00
2,674
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
1,162
$0.00
2,330
Anschutz Barron
Exempt
Aug 24, 2026
$0.00
1,258
$0.00
7,548
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
2,267
$0.00
13,606
Anschutz Barron
Exempt
Aug 24, 2026
$0.00
1,629
$0.00
16,290
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
6,095
$0.00
60,957
Anschutz Barron
Exempt
Aug 24, 2026
$0.00
1,337
$0.00
75,212
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
3,713
$0.00
7,426
Anschutz Barron
In Kind
Aug 24, 2026
$21,721.60
640
$33.94
74,572
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
7,764
$0.00
77,644
Anschutz Barron
Exempt
Aug 24, 2026
$0.00
1,258
$0.00
75,830
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
4,368
$0.00
26,208
Anschutz Barron
In Kind
Aug 24, 2026
$20,431.88
602
$33.94
75,228
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
1,162
$0.00
183,350
Anschutz Barron
Exempt
Aug 24, 2026
$0.00
1,629
$0.00
76,857
Thurmond Mark C.
Co-Chief Executive Officer
In Kind
Aug 24, 2026
$19,074.28
562
$33.94
182,788
Anschutz Barron
In Kind
Aug 24, 2026
$26,473.20
780
$33.94
76,077
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
2,267
$0.00
185,055
Thurmond Mark C.
Co-Chief Executive Officer
In Kind
Aug 24, 2026
$37,232.18
1,097
$33.94
183,958
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
6,095
$0.00
190,053
Thurmond Mark C.
Co-Chief Executive Officer
In Kind
Aug 24, 2026
$100,021.18
2,947
$33.94
187,106
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
3,713
$0.00
190,819
Thurmond Mark C.
Co-Chief Executive Officer
In Kind
Aug 24, 2026
$60,956.24
1,796
$33.94
189,023
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
7,764
$0.00
196,787
Thurmond Mark C.
Co-Chief Executive Officer
In Kind
Aug 24, 2026
$127,410.76
3,754
$33.94
193,033
Thurmond Mark C.
Co-Chief Executive Officer
Exempt
Aug 24, 2026
$0.00
4,368
$0.00
197,401
Thurmond Mark C.
Co-Chief Executive Officer
In Kind
Aug 24, 2026
$71,681.28
2,112
$33.94
195,289
Zecher Linda Kay
Sell
Aug 19, 2026
$24,674.40
690
$35.76
7,012
Zecher Linda Kay
Sell
Aug 18, 2026
$24,822.00
700
$35.46
7,702
Zecher Linda Kay
Sell
Aug 07, 2026
$20,075.00
550
$36.50
8,402