Tenable Holdings, Inc.
US ˙ NasdaqGS ˙ US88025T1025

SecurityTENB / Tenable Holdings, Inc.
InstitutionPinnacle Associates Ltd
Latest Disclosed Ownership417,245 shares
Latest Disclosed Value $ 7,057,699
Pinnacle Associates Ltd reports 160.90% increase in ownership of TENB / Tenable Holdings, Inc.

On April 21, 2026 - Pinnacle Associates Ltd filed a 13F-HR form disclosing ownership of 417,245 shares of Tenable Holdings, Inc. (US:TENB) valued at $7,057,699 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 159,927 shares of Tenable Holdings, Inc.. This represents a change in shares of 160.90% during the quarter. The current value of the position is $11,620,273 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-04-21 2026-03-31 13F TENABLE HLDGS COM 88025T102 417,245 257,318 160.90 7,058 87.54 0.0905
2026-02-05 2025-12-31 13F TENABLE HLDGS COM 88025T102 159,927 100 0.06 3,763 -19.25 0.0483
2025-11-13 2025-09-30 13F TENABLE HLDGS COM 88025T102 159,827 -7,570 -4.52 4,661 -17.58 0.0618
2025-08-04 2025-06-30 13F TENABLE HLDGS COM 88025T102 167,397 -68,580 -29.06 5,655 -31.50 0.0819
2025-05-06 2025-03-31 13F TENABLE HLDGS COM 88025T102 235,977 -10,906 -4.42 8,254 -15.10 0.1210
2025-02-14 2024-12-31 13F TENABLE HLDGS COM 88025T102 246,883 -47,197 -16.05 9,722 -28.22 0.1319
2024-10-25 2024-09-30 13F TENABLE HLDGS COM 88025T102 294,080 3,004 1.03 13,545 6.78 0.2303
2024-07-30 2024-06-30 13F TENABLE HLDGS COM 88025T102 291,076 -1,624 -0.55 12,685 -12.32 0.1986
2024-04-26 2024-03-31 13F TENABLE HLDGS COM 88025T102 292,700 -1,380 -0.47 14,468 6.81 0.2280
2024-01-19 2023-12-31 13F TENABLE HLDGS COM 88025T102 294,080 -2,526 -0.85 13,545 1.94 0.2279
2023-10-24 2023-09-30 13F TENABLE HLDGS COM 88025T102 296,606 -12,855 -4.15 13,288 -1.41 0.2470
2023-07-27 2023-06-30 13F TENABLE HLDGS COM 88025T102 309,461 -11,551 -3.60 13,477 -11.63 0.2339
2023-05-05 2023-03-31 13F TENABLE HLDGS COM 88025T102 321,012 -8,086 -2.46 15,251 21.47 0.3119
2023-02-01 2022-12-31 13F/A-1 TENABLE HLDGS COM 88025T102 329,098 -4,375 -1.31 12,555 8.19 0.2736
2023-01-25 2022-12-31 13F TENABLE HLDGS COM 88025T102 326,608 -6,865 12,375 0.0003
2022-11-01 2022-09-30 13F TENABLE HLDGS COM 88025T102 333,473 -12,849 -3.71 11,605 -26.21 0.2664
2022-08-02 2022-06-30 13F TENABLE HLDGS COM 88025T102 346,322 -1,107 -0.32 15,726 -21.68 0.3429
2022-05-05 2022-03-31 13F TENABLE HLDGS COM 88025T102 347,429 -20,689 -5.62 20,078 -0.96 0.3554
2022-02-02 2021-12-31 13F TENABLE HLDGS COM 88025T102 368,118 -4,412 -1.18 20,272 17.94 0.3497
2021-10-19 2021-09-30 13F TENABLE HLDGS COM 88025T102 372,530 -12,430 -3.23 17,189 7.98 0.3169
2021-08-02 2021-06-30 13F TENABLE HLDGS COM 88025T102 384,960 4,194 1.10 15,918 15.53 0.2878
2021-05-12 2021-03-31 13F TENABLE HLDGS COM 88025T102 380,766 -228,212 -37.47 13,778 -56.71 0.2627
2021-01-26 2020-12-31 13F TENABLE HLDGS COM 88025T102 608,978 -42,301 -6.50 31,825 29.44 0.6462
2020-10-23 2020-09-30 13F TENABLE HLDGS COM 88025T102 651,279 30,540 4.92 24,586 32.87 0.5839
2020-08-14 2020-06-30 13F TENABLE HLDGS COM 88025T102 620,739 128,135 26.01 18,504 71.84 0.4563
2020-05-13 2020-03-31 13F TENABLE HLDGS COM 88025T102 492,604 140,089 39.74 10,768 27.49 0.3271
2020-02-03 2019-12-31 13F TENABLE HLDGS COM 88025T102 352,515 279,525 382.96 8,446 416.89 0.1850
2019-11-08 2019-09-30 13F TENABLE HLDGS COM 88025T102 72,990 72,990 1,634 0.0385
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.