Tenable Holdings, Inc.
US ˙ NasdaqGS ˙ US88025T1025

SecurityTENB / Tenable Holdings, Inc.
InstitutionQuantbot Technologies LP
Latest Disclosed Ownership43,065 shares
Latest Disclosed Value $ 728,444
Quantbot Technologies LP reports 71.28% decrease in ownership of TENB / Tenable Holdings, Inc.

On May 13, 2026 - Quantbot Technologies LP filed a 13F-HR form disclosing ownership of 43,065 shares of Tenable Holdings, Inc. (US:TENB) valued at $728,444 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 149,934 shares of Tenable Holdings, Inc.. This represents a change in shares of -71.28% during the quarter. The current value of the position is $1,278,600 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)
2026-05-13 2026-03-31 13F TENABLE HOLDINGS COM 88025T102 43,065 -106,869 -71.28 728 -79.36 0.0298
2026-02-10 2025-12-31 13F TENABLE HOLDINGS COM 88025T102 149,934 -36,535 -19.59 3,528 -35.13 0.1174
2025-11-12 2025-09-30 13F TENABLE HOLDINGS COM 88025T102 186,469 -142,780 -43.37 5,437 -51.11 0.1480
2025-08-13 2025-06-30 13F TENABLE HOLDINGS COM 88025T102 329,249 290,889 758.31 11,122 729.38 0.2851
2025-05-13 2025-03-31 13F TENABLE HOLDINGS COM 88025T102 38,360 -57,522 -59.99 1,342 -64.48 0.0427
2025-02-11 2024-12-31 13F TENABLE HOLDINGS COM 88025T102 95,882 22,000 29.78 3,776 26.13 0.1380
2024-11-13 2024-09-30 13F TENABLE HOLDINGS COM 88025T102 73,882 15,056 25.59 2,994 16.78 0.1181
2024-08-09 2024-06-30 13F TENABLE HOLDINGS COM 88025T102 58,826 58,826 2,564 0.1241
2024-05-06 2024-03-31 13F TENABLE HOLDINGS COM 88025T102 0 -6,204 -100.00 0 -100.00
2024-02-14 2023-12-31 13F TENABLE HOLDINGS COM 88025T102 6,204 -17,737 -74.09 286 -73.41 0.0166
2023-11-07 2023-09-30 13F TENABLE HOLDINGS COM 88025T102 23,941 11,214 88.11 1,073 93.50 0.0721
2023-08-08 2023-06-30 13F TENABLE HOLDINGS COM 88025T102 12,727 12,727 554 0.0363
2023-02-13 2022-12-31 13F TENABLE HOLDINGS COM 88025T102 0 -16,907 -100.00 0 -100.00
2022-11-07 2022-09-30 13F TENABLE HOLDINGS COM 88025T102 16,907 1,528 9.94 588 -15.76 0.0444
2022-08-09 2022-06-30 13F TENABLE HOLDINGS COM 88025T102 15,379 2,360 18.13 698 -7.18 0.0642
2022-05-16 2022-03-31 13F TENABLE HOLDINGS COM 88025T102 13,019 3,229 32.98 752 39.52 0.0656
2022-02-11 2021-12-31 13F TENABLE HOLDINGS COM 88025T102 9,790 9,790 539 0.0437
2021-11-09 2021-09-30 13F TENABLE HOLDINGS COM 88025T102 0 -6,760 -100.00 0 -100.00
2021-08-12 2021-06-30 13F TENABLE HOLDINGS COM 88025T102 6,760 -67,891 -90.94 279 -89.67 0.0219
2021-05-14 2021-03-31 13F TENABLE HOLDINGS COM 88025T102 74,651 74,651 2,701 0.2571
2021-02-12 2020-12-31 13F TENABLE HOLDINGS COM 88025T102 0 -487 -100.00 0 -100.00
2020-11-16 2020-09-30 13F TENABLE HOLDINGS COM 88025T102 487 -11,190 -95.83 18 -94.83 0.0021
2020-08-13 2020-06-30 13F TENABLE HOLDINGS COM 88025T102 11,677 11,677 348 0.0460
2020-05-13 2020-03-31 13F TENABLE HOLDINGS COM 88025T102 0 -15,275 -100.00 0 -100.00
2020-02-10 2019-12-31 13F TENABLE HOLDINGS COM 88025T102 15,275 -20,361 -57.14 365 -54.20 0.0362
2019-11-12 2019-09-30 13F TENABLE HOLDINGS COM 88025T102 35,636 7,470 26.52 797 -0.75 0.0786
2019-08-13 2019-06-30 13F TENABLE HOLDINGS COM 88025T102 28,166 3,984 16.48 803 4.97 0.0803
2019-05-13 2019-03-31 13F TENABLE HOLDINGS COM 88025T102 24,182 11,282 87.46 765 167.48 0.0728
2019-02-13 2018-12-31 13F TENABLE HOLDINGS COM 88025T102 12,900 12,900 286 0.0280
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.