Vertex, Inc.
US ˙ NasdaqGM ˙ US92538J1060

SecurityVERX / Vertex, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership140,172 shares
Latest Disclosed Value $ 2,799,535
Sei Investments Co reports 62.25% decrease in ownership of VERX / Vertex, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 140,172 shares of Vertex, Inc. (US:VERX) valued at $2,799,235 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 371,323 shares of Vertex, Inc.. This represents a change in shares of -62.25% during the quarter. The current value of the position is $1,792,800 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)
2026-02-13 2025-12-31 13F VERTEX CL A 92538J106 140,172 -231,151 -62.25 2,800 -69.59 0.0028
2025-11-13 2025-09-30 13F VERTEX CL A 92538J106 371,323 43,235 13.18 9,205 -20.59 0.0099
2025-08-14 2025-06-30 13F VERTEX CL A 92538J106 328,088 188,991 135.87 11,593 138.03 0.0134
2025-05-14 2025-03-31 13F/A-1 VERTEX CL A 92538J106 139,097 52,813 61.21 4,871 5.82 0.0063
2025-05-13 2025-03-31 13F VERTEX CL A 92538J106 74,615 -11,669 3,469 0.0038
2025-02-11 2024-12-31 13F VERTEX CL A 92538J106 86,284 7,430 9.42 4,603 51.58 0.0059
2024-11-12 2024-09-30 13F VERTEX CL A 92538J106 78,854 -11,275 -12.51 3,037 -6.56 0.0039
2024-08-13 2024-06-30 13F VERTEX CL A 92538J106 90,129 45,493 101.92 3,249 129.29 0.0046
2024-05-07 2024-03-31 13F VERTEX CL A 92538J106 44,636 -6,050 -11.94 1,418 3.81 0.0021
2024-02-14 2023-12-31 13F VERTEX CL A 92538J106 50,686 33,206 189.97 1,366 238.71 0.0022
2023-11-14 2023-09-30 13F VERTEX CL A 92538J106 17,480 2,036 13.18 404 33.89 0.0007
2023-08-11 2023-06-30 13F VERTEX CL A 92538J106 15,444 -11,997 -43.72 301 -46.91 0.0005
2023-05-12 2023-03-31 13F VERTEX CL A 92538J106 27,441 12,917 88.94 568 170.00 0.0011
2023-02-10 2022-12-31 13F VERTEX CL A 92538J106 14,524 785 5.71 211 11.70 0.0005
2022-11-14 2022-09-30 13F VERTEX CL A 92538J106 13,739 814 6.30 188 28.77 0.0004
2022-08-15 2022-06-30 13F VERTEX CL A 92538J106 12,925 -853 -6.19 146 -30.48 0.0003
2022-05-13 2022-03-31 13F VERTEX CL A 92538J106 13,778 3,045 28.37 210 25.00 0.0004
2022-02-14 2021-12-31 13F VERTEX CL A 92538J106 10,733 175 1.66 168 -16.83 0.0003
2021-11-12 2021-09-30 13F VERTEX CL A 92538J106 10,558 10,558 202 0.0004
2021-08-06 2021-06-30 13F VERTEX CL A 92538J106 0 -16,915 -100.00 0 -100.00
2021-05-12 2021-03-31 13F VERTEX CL A 92538J106 16,915 -135 -0.79 372 -37.37 0.0009
2021-02-08 2020-12-31 13F VERTEX CL A 92538J106 17,050 5,610 49.04 594 125.86 0.0015
2020-12-04 2020-09-30 13F/A-1 VERTEX CL A 92538J106 11,440 11,440 263 0.0008
2020-11-06 2020-09-30 13F VERTEX CL A 92538J106 11,440 11,440 263
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.