Tenable Holdings, Inc.
US ˙ NasdaqGS ˙ US88025T1025

SecurityTENB / Tenable Holdings, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership87,661 shares
Latest Disclosed Value $ 1,482,786
Engineers Gate Manager LP reports 57.49% decrease in ownership of TENB / Tenable Holdings, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 87,661 shares of Tenable Holdings, Inc. (US:TENB) valued at $1,482,786 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 206,207 shares of Tenable Holdings, Inc.. This represents a change in shares of -57.49% during the quarter. The current value of the position is $2,602,655 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)
2026-05-15 2026-03-31 13F TENABLE HLDGS COM 88025T102 87,661 -118,546 -57.49 1,483 -69.46 0.0185
2026-02-17 2025-12-31 13F TENABLE HLDGS COM 88025T102 206,207 -70,087 -25.37 4,852 -39.77 0.0575
2025-11-14 2025-09-30 13F TENABLE HLDGS COM 88025T102 276,294 170,904 162.16 8,057 126.29 0.0922
2025-08-14 2025-06-30 13F TENABLE HLDGS COM 88025T102 105,390 4,789 4.76 3,560 1.17 0.0443
2025-05-15 2025-03-31 13F TENABLE HLDGS COM 88025T102 100,601 26,874 36.45 3,519 21.22 0.0593
2025-02-14 2024-12-31 13F TENABLE HLDGS COM 88025T102 73,727 48,275 189.67 2,903 181.57 0.0505
2024-11-14 2024-09-30 13F TENABLE HLDGS COM 88025T102 25,452 -1,186 -4.45 1,031 -11.12 0.0201
2024-08-14 2024-06-30 13F TENABLE HLDGS COM 88025T102 26,638 26,638 1,161 0.0262
2024-05-15 2024-03-31 13F TENABLE HLDGS COM 88025T102 0 -8,048 -100.00 0 -100.00
2024-02-14 2023-12-31 13F TENABLE HLDGS COM 88025T102 8,048 -16,370 -67.04 371 -66.15 0.0106
2023-11-14 2023-09-30 13F TENABLE HLDGS COM 88025T102 24,418 8,877 57.12 1,094 61.69 0.0404
2023-08-14 2023-06-30 13F TENABLE HLDGS COM 88025T102 15,541 15,541 677 0.0256
2023-05-15 2023-03-31 13F TENABLE HLDGS COM 88025T102 0 -19,045 -100.00 0 -100.00
2023-02-14 2022-12-31 13F TENABLE HLDGS COM 88025T102 19,045 -38,377 -66.83 727 -63.66 0.0436
2022-11-14 2022-09-30 13F TENABLE HLDGS COM 88025T102 57,422 -38,231 -39.97 1,998 -54.01 0.1243
2022-08-15 2022-06-30 13F TENABLE HLDGS COM 88025T102 95,653 79,876 506.28 4,344 376.32 0.1592
2022-05-16 2022-03-31 13F TENABLE HLDGS COM 88025T102 15,777 3,590 29.46 912 35.92 0.0357
2022-02-14 2021-12-31 13F TENABLE HLDGS COM 88025T102 12,187 4,270 53.93 671 83.84 0.0302
2021-11-15 2021-09-30 13F TENABLE HLDGS COM 88025T102 7,917 -41,722 -84.05 365 -82.22 0.0208
2021-08-16 2021-06-30 13F TENABLE HLDGS COM 88025T102 49,639 6,909 16.17 2,053 32.79 0.1320
2021-05-17 2021-03-31 13F TENABLE HLDGS COM 88025T102 42,730 -21,895 -33.88 1,546 -54.22 0.0766
2021-02-16 2020-12-31 13F TENABLE HLDGS COM 88025T102 64,625 -78,377 -54.81 3,377 -37.44 0.1464
2020-11-16 2020-09-30 13F TENABLE HLDGS COM 88025T102 143,002 73,344 105.29 5,398 159.89 0.2533
2020-08-17 2020-06-30 13F TENABLE HLDGS COM 88025T102 69,658 21,786 45.51 2,077 98.57 0.1057
2020-05-15 2020-03-31 13F TENABLE HLDGS COM 88025T102 47,872 -41,120 -46.21 1,046 -50.94 0.0753
2020-02-14 2019-12-31 13F TENABLE HLDGS COM 88025T102 88,992 26,259 41.86 2,132 51.85 0.0938
2019-11-14 2019-09-30 13F TENABLE HLDGS COM 88025T102 62,733 62,733 1,404 0.0713
2019-08-14 2019-06-30 13F TENABLE HLDGS COM 88025T102 0 -51,028 -100.00 0 -100.00
2019-05-15 2019-03-31 13F TENABLE HLDGS COM 88025T102 51,028 51,028 1,616 0.0979
2019-02-14 2018-12-31 13F TENABLE HLDGS COM 88025T102 0 -72,228 -100.00 0 -100.00
2018-11-01 2018-09-30 13F TENABLE HLDGS COM 88025T102 72,228 72,228 2,808 0.2157
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.