Five9, Inc.
MX ˙ BMV ˙ US3383071012
SecurityMX:FIVN / Five9, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership714,481 shares
Latest Disclosed Value $ 10,838,677
Northern Trust Corp reports 0.26% increase in ownership of FIVN / Five9, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 714,481 shares of Five9, Inc. (MX:FIVN) valued at $10,838,677 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 712,632 shares of Five9, Inc.. This represents a change in shares of 0.26% 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)
2026-05-14 2026-03-31 13F FIVE9 COM 338307101 714,481 1,849 0.26 10,839 -24.15 0.0003
2026-02-17 2025-12-31 13F FIVE9 COM 338307101 712,632 -26,634 -3.60 14,288 -20.13 0.0004
2025-11-14 2025-09-30 13F FIVE9 COM 338307101 739,266 3,733 0.51 17,890 -8.14 0.0023
2025-08-13 2025-06-30 13F FIVE9 COM 338307101 735,533 285,523 63.45 19,477 59.42 0.0027
2025-05-13 2025-03-31 13F FIVE9 COM 338307101 450,010 -19,846 -4.22 12,218 -36.02 0.0018
2025-02-14 2024-12-31 13F FIVE9 COM 338307101 469,856 69,142 17.25 19,095 65.86 0.0027
2024-11-13 2024-09-30 13F FIVE9 COM 338307101 400,714 -13,422 -3.24 11,513 -36.97 0.0019
2024-08-14 2024-06-30 13F FIVE9 COM 338307101 414,136 7,147 1.76 18,263 -27.75 0.0031
2024-05-14 2024-03-31 13F FIVE9 COM 338307101 406,989 -276 -0.07 25,278 -21.12 0.0044
2024-02-13 2023-12-31 13F FIVE9 COM 338307101 407,265 5,511 1.37 32,048 24.06 0.0058
2023-11-13 2023-09-30 13F FIVE9 COM 338307101 401,754 -120,605 -23.09 25,833 -40.02 0.0050
2023-08-11 2023-06-30 13F FIVE9 COM 338307101 522,359 15,717 3.10 43,068 17.59 0.0083
2023-05-15 2023-03-31 13F FIVE9 COM 338307101 506,642 22,018 4.54 36,625 11.37 0.0073
2023-02-13 2022-12-31 13F FIVE9 COM 338307101 484,624 134,928 38.58 32,887 25.42 0.0069
2022-11-14 2022-09-30 13F FIVE9 COM 338307101 349,696 120 0.03 26,221 -17.70 0.0060
2022-08-12 2022-06-30 13F FIVE9 COM 338307101 349,576 12,927 3.84 31,860 -14.28 0.0068
2022-05-13 2022-03-31 13F FIVE9 COM 338307101 336,649 -6,328 -1.85 37,166 -21.08 0.0065
2022-02-08 2021-12-31 13F FIVE9 COM 338307101 342,977 19,822 6.13 47,096 -8.77 0.0077
2021-11-15 2021-09-30 13F FIVE9 COM 338307101 323,155 -52,454 -13.97 51,621 -25.06 0.0091
2021-08-13 2021-06-30 13F FIVE9 COM 338307101 375,609 -622 -0.17 68,882 17.11 0.0121
2021-05-12 2021-03-31 13F FIVE9 COM 338307101 376,231 -3,538 -0.93 58,816 -11.20 0.0109
2021-02-11 2020-12-31 13F FIVE9 COM 338307101 379,769 -584 -0.15 66,232 34.28 0.0129
2020-11-16 2020-09-30 13F FIVE9 COM 338307101 380,353 -85,739 -18.40 49,324 -4.38 0.0108
2020-08-14 2020-06-30 13F FIVE9 COM 338307101 466,092 -458,821 -49.61 51,582 -27.06 0.0122
2020-05-14 2020-03-31 13F FIVE9 COM 338307101 924,913 22,162 2.45 70,720 19.45 0.0203
2020-02-14 2019-12-31 13F FIVE9 COM 338307101 902,751 -30,090 -3.23 59,203 18.10 0.0133
2019-11-13 2019-09-30 13F FIVE9 COM 338307101 932,841 48,674 5.51 50,130 10.54 0.0120
2019-08-13 2019-06-30 13F FIVE9 COM 338307101 884,167 28,862 3.37 45,349 0.36 0.0108
2019-05-13 2019-03-31 13F FIVE9 COM 338307101 855,305 14,876 1.77 45,186 22.98 0.0112
2019-02-12 2018-12-31 13F FIVE9 COM 338307101 840,429 7,512 0.90 36,744 0.98 0.0103
2018-11-14 2018-09-30 13F FIVE9 COM 338307101 832,917 64,406 8.38 36,389 36.97 0.0089
2018-09-18 2018-06-30 13F/A-1 FIVE9 COM 338307101 768,511 55,501 7.78 26,568 25.08 0.0067
2018-08-14 2018-06-30 13F FIVE9 COM 338307101 771,856 58,846 26,683
2018-05-09 2018-03-31 13F FIVE9 COM 338307101 713,010 15,012 2.15 21,240 22.30 0.0055
2018-02-14 2017-12-31 13F FIVE9 COM 338307101 697,998 2,972 0.43 17,367 4.55 0.0044
2017-11-13 2017-09-30 13F FIVE9 COM 338307101 695,026 24,447 3.65 16,611 15.10 0.0043
2017-08-11 2017-06-30 13F FIVE9 COM 338307101 670,579 193,100 40.44 14,432 83.66 0.0040
2017-05-12 2017-03-31 13F FIVE9 COM 338307101 477,479 63,371 15.30 7,858 33.75 0.0023
2017-02-13 2016-12-31 13F FIVE9 COM 338307101 414,108 -70,041 -14.47 5,875 -22.61 0.0018
2016-11-09 2016-09-30 13F FIVE9 COM 338307101 484,149 86,825 21.85 7,591 60.59 0.0024
2016-08-12 2016-06-30 13F FIVE9 COM 338307101 397,324 94,105 31.04 4,727 91.14 0.0015
2016-08-19 2016-03-31 13F/A-1 FIVE9 COM 338307101 303,219 55,586 22.45 2,473 14.76 0.0008
2016-05-13 2016-03-31 13F Five9 COMM 338307101 303,219 2,695
2016-02-12 2015-12-31 13F FIVE9 COM 338307101 247,633 -2,424 -0.97 2,155 132.97 0.0007
2015-11-12 2015-09-30 13F FIVE9 COM 338307101 250,057 121,299 94.21 925 37.44 0.0003
2015-08-13 2015-06-30 13F FIVE9 COM 338307101 128,758 5,442 4.41 673 -1.75 0.0005
2015-05-14 2015-03-31 13F FIVE9 COM 338307101 123,316 0 0.00 685 23.87 0.0002
2015-02-12 2014-12-31 13F FIVE9 COM 338307101 123,316 -2,299 -1.83 553 -32.64 0.0002
2014-11-13 2014-09-30 13F FIVE9 COM 338307101 125,615 86,333 219.78 821 190.11 0.0003
2014-08-14 2014-06-30 13F FIVE9 COM 338307101 39,282 39,282 283 0.0001
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.