Five9, Inc.
MX ˙ BMV ˙ US3383071012
SecurityMX:FIVN / Five9, Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership20,827 shares
Latest Disclosed Value $ 417,553
Sei Investments Co reports 45.16% decrease in ownership of FIVN / Five9, Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 20,827 shares of Five9, Inc. (MX:FIVN) valued at $417,553 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 37,979 shares of Five9, Inc.. This represents a change in shares of -45.16% during the quarter.

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 FIVE9 COM 338307101 20,827 -17,152 -45.16 418 -54.62 0.0004
2025-11-13 2025-09-30 13F FIVE9 COM 338307101 37,979 -6,104 -13.85 919 -21.25 0.0010
2025-08-14 2025-06-30 13F FIVE9 COM 338307101 44,083 -6,892 -13.52 1,167 -15.68 0.0014
2025-05-14 2025-03-31 13F/A-1 FIVE9 COM 338307101 50,975 17,655 52.99 1,384 2.22 0.0018
2025-05-13 2025-03-31 13F FIVE9 COM 338307101 36,212 2,892 1,423 0.0015
2025-02-11 2024-12-31 13F FIVE9 COM 338307101 33,320 -51,854 -60.88 1,354 -44.64 0.0017
2024-11-12 2024-09-30 13F FIVE9 COM 338307101 85,174 -139,981 -62.17 2,447 -75.37 0.0032
2024-08-13 2024-06-30 13F FIVE9 COM 338307101 225,155 32,946 17.14 9,929 -16.83 0.0141
2024-05-07 2024-03-31 13F FIVE9 COM 338307101 192,209 9,816 5.38 11,938 -16.82 0.0175
2024-02-14 2023-12-31 13F FIVE9 COM 338307101 182,393 -68,200 -27.22 14,352 -10.92 0.0230
2023-11-14 2023-09-30 13F FIVE9 COM 338307101 250,593 -11,521 -4.40 16,113 -25.45 0.0290
2023-08-11 2023-06-30 13F FIVE9 COM 338307101 262,114 76,883 41.51 21,611 61.40 0.0377
2023-05-12 2023-03-31 13F FIVE9 COM 338307101 185,231 35,735 23.90 13,391 32.00 0.0249
2023-02-10 2022-12-31 13F FIVE9 COM 338307101 149,496 -140,057 -48.37 10,144 -53.27 0.0225
2022-11-14 2022-09-30 13F FIVE9 COM 338307101 289,553 21,081 7.85 21,710 -11.00 0.0484
2022-08-15 2022-06-30 13F FIVE9 COM 338307101 268,472 187,563 231.82 24,394 175.05 0.0527
2022-05-13 2022-03-31 13F FIVE9 COM 338307101 80,909 5,358 7.09 8,869 -14.25 0.0178
2022-02-14 2021-12-31 13F FIVE9 COM 338307101 75,551 54,989 267.43 10,343 223.42 0.0194
2021-11-12 2021-09-30 13F FIVE9 COM 338307101 20,562 -59,832 -74.42 3,198 -78.48 0.0067
2021-08-06 2021-06-30 13F FIVE9 COM 338307101 80,394 -7,366 -8.39 14,858 6.91 0.0329
2021-05-12 2021-03-31 13F FIVE9 COM 338307101 87,760 33,529 61.83 13,898 47.01 0.0350
2021-02-08 2020-12-31 13F FIVE9 COM 338307101 54,231 9,220 20.48 9,454 61.99 0.0244
2020-12-04 2020-09-30 13F/A-1 FIVE9 COM 338307101 45,011 298 0.67 5,836 17.71 0.0169
2020-11-06 2020-09-30 13F FIVE9 COM 338307101 45,115 402 5,849 14,083.0915
2020-08-17 2020-06-30 13F/A-1 FIVE9 COM 338307101 44,713 -13,743 -23.51 4,958 10.94 0.0154
2020-08-11 2020-06-30 13F FIVE9 COM 338307101 39,920 -18,536 3,188 8,647.6197
2020-05-14 2020-03-31 13F FIVE9 COM 338307101 58,456 18,260 45.43 4,469 69.67 0.0164
2020-02-06 2019-12-31 13F FIVE9 COM 338307101 40,196 20,384 102.89 2,634 146.63 0.0079
2019-11-12 2019-09-30 13F FIVE9 COM 338307101 19,812 4,155 26.54 1,068 32.67 0.0027
2019-08-14 2019-06-30 13F FIVE9 COM 338307101 15,657 -14,703 -48.43 805 -49.97 0.0026
2019-05-15 2019-03-31 13F FIVE9 COM 338307101 30,360 -4,640 -13.26 1,609 5.30 0.0054
2019-02-13 2018-12-31 13F FIVE9 COM 338307101 35,000 15,780 82.10 1,528 82.34 0.0054
2018-11-08 2018-09-30 13F FIVE9 COM 338307101 19,220 -39,040 -67.01 838 -58.39 0.0030
2018-08-03 2018-06-30 13F FIVE9 COM 338307101 58,260 36,659 169.71 2,014 212.73 0.0068
2018-05-11 2018-03-31 13F FIVE9 COM 338307101 21,601 2,864 15.29 644 38.20 0.0025
2018-02-08 2017-12-31 13F FIVE9 COM 338307101 18,737 -546 -2.83 466 1.08 0.0016
2017-11-06 2017-09-30 13F FIVE9 COM 338307101 19,283 5,961 44.75 461 60.63 0.0016
2017-07-31 2017-06-30 13F FIVE9 COM 338307101 13,322 3,871 40.96 287 83.97 0.0011
2017-05-05 2017-03-31 13F FIVE9 COM 338307101 9,451 -134,062 -93.41 156 -92.34 0.0007
2017-02-02 2016-12-31 13F FIVE9 COM 338307101 143,513 102,547 250.32 2,036 217.13 0.0099
2016-11-04 2016-09-30 13F FIVE9 COM 338307101 40,966 -52,508 -56.17 642 -42.27 0.0033
2016-08-11 2016-06-30 13F FIVE9 COM 338307101 93,474 93,474 1,112 0.0067
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.