Five9, Inc.
MX ˙ BMV ˙ US3383071012
SecurityMX:FIVN / Five9, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership100,398 shares
Latest Disclosed Value $ 1,523,027
Rhumbline Advisers reports 1.37% increase in ownership of FIVN / Five9, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 100,398 shares of Five9, Inc. (MX:FIVN) valued at $1,523,027 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 99,041 shares of Five9, Inc.. This represents a change in shares of 1.37% 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)
2026-05-12 2026-03-31 13F FIVE9 INC COM COM 338307101 100,398 1,357 1.37 1,523 -23.27 0.0013
2026-02-13 2025-12-31 13F FIVE9 INC COM COM 338307101 99,041 -13,739 -12.18 1,986 -27.26 0.0016
2025-11-06 2025-09-30 13F FIVE9 INC COM COM 338307101 112,780 -3,850 -3.30 2,729 -11.63 0.0022
2025-08-12 2025-06-30 13F FIVE9 INC COM COM 338307101 116,630 33,369 40.08 3,088 36.64 0.0026
2025-05-29 2025-03-31 13F/A-1 FIVE9 INC COM COM 338307101 83,261 -6,200 -6.93 2,260 -37.83 0.0021
2025-04-08 2025-03-31 13F FIVE9 INC COM COM 338307101 83,261 -6,200 2,260 0.0021
2025-05-29 2024-12-31 13F/A-1 FIVE9 INC COM COM 338307101 89,461 -577 -0.64 3,636 40.56 0.0033
2025-01-30 2024-12-31 13F FIVE9 INC COM COM 338307101 89,461 -577 3,636 0.0033
2024-11-12 2024-09-30 13F FIVE9 INC COM COM 338307101 90,038 4,038 4.70 2,587 -31.80 0.0023
2024-08-01 2024-06-30 13F FIVE9 INC COM COM 338307101 86,000 673 0.79 3,793 -28.44 0.0036
2024-05-09 2024-03-31 13F FIVE9 INC COM COM 338307101 85,327 -8,432 -8.99 5,300 -28.17 0.0051
2024-02-08 2023-12-31 13F FIVE9 INC COM COM 338307101 93,759 -280 -0.30 7,378 22.01 0.0077
2023-11-09 2023-09-30 13F FIVE9 INC COM COM 338307101 94,039 -2,246 -2.33 6,047 -23.83 0.0070
2023-08-08 2023-06-30 13F FIVE9 INC COM COM 338307101 96,285 12,965 15.56 7,939 132,200.00 0.0089
2023-05-11 2023-03-31 13F FIVE9 INC COM COM 338307101 83,320 5,633 7.25 6 -99.89 0.0074
2023-02-14 2022-12-31 13F FIVE9 INC COM COM 338307101 77,687 5,245 7.24 5,272 -2.95 0.0071
2022-11-10 2022-09-30 13F FIVE9 INC COM COM 338307101 72,442 3,671 5.34 5,432 -13.34 0.0081
2022-08-11 2022-06-30 13F FIVE9 INC COM COM 338307101 68,771 8,022 13.21 6,268 -6.55 0.0091
2022-05-12 2022-03-31 13F FIVE9 INC COM COM 338307101 60,749 -5,411 -8.18 6,707 -26.18 0.0086
2022-02-10 2021-12-31 13F FIVE9 INC COM COM 338307101 66,160 3,725 5.97 9,085 -8.90 0.0111
2021-11-12 2021-09-30 13F FIVE9 INC COM COM 338307101 62,435 -863 -1.36 9,973 -14.09 0.0135
2021-08-05 2021-06-30 13F FIVE9 INC COM COM 338307101 63,298 -193 -0.30 11,608 16.95 0.0152
2021-05-06 2021-03-31 13F FIVE9 INC COM COM 338307101 63,491 -3,510 -5.24 9,926 -15.05 0.0135
2021-02-10 2020-12-31 13F FIVE9 INC COM COM 338307101 67,001 -1,317 -1.93 11,685 31.90 0.0161
2020-11-12 2020-09-30 13F FIVE9 INC COM COM 338307101 68,318 -3,468 -4.83 8,859 11.50 0.0139
2020-08-13 2020-06-30 13F FIVE9 INC COM COM 338307101 71,786 -11,550 -13.86 7,945 24.69 0.0133
2020-05-06 2020-03-31 13F FIVE9 INC COM COM 338307101 83,336 693 0.84 6,372 17.56 0.0134
2020-02-05 2019-12-31 13F FIVE9 INC COM COM 338307101 82,643 2,964 3.72 5,420 26.58 0.0091
2019-10-23 2019-09-30 13F FIVE9 INC COM COM 338307101 79,679 240 0.30 4,282 5.11 0.0078
2019-08-14 2019-06-30 13F FIVE9 INC COM COM 338307101 79,439 3,545 4.67 4,074 1.62 0.0076
2019-05-01 2019-03-31 13F FIVE9 INC COM COM 338307101 75,894 -740 -0.97 4,009 19.67 0.0078
2019-01-31 2018-12-31 13F FIVE9 INC COM COM 338307101 76,634 25,080 48.65 3,350 48.76 0.0073
2018-11-07 2018-09-30 13F FIVE9 INC COM COM 338307101 51,554 -3,335 -6.08 2,252 18.65 0.0043
2018-08-06 2018-06-30 13F FIVE9 INC COM COM 338307101 54,889 5,426 10.97 1,898 28.77 0.0038
2018-05-02 2018-03-31 13F FIVE9 INC COM COM 338307101 49,463 5 0.01 1,474 19.74 0.0031
2018-02-09 2017-12-31 13F FIVE9 INC COM COM 338307101 49,458 -9,156 -15.62 1,231 -12.13 0.0025
2017-11-06 2017-09-30 13F FIVE9 INC COM COM 338307101 58,614 735 1.27 1,401 12.44 0.0030
2017-08-02 2017-06-30 13F FIVE9 INC COM COM 338307101 57,879 21,991 61.28 1,246 110.83 0.0028
2017-05-02 2017-03-31 13F FIVE9 INC COM COM 338307101 35,888 677 1.92 591 18.20 0.0014
2017-01-27 2016-12-31 13F FIVE9 INC COM COM 338307101 35,211 4,408 14.31 500 3.52 0.0013
2016-11-08 2016-09-30 13F FIVE9 INC COM COM 338307101 30,803 1,200 4.05 483 37.22 0.0013
2016-08-11 2016-06-30 13F FIVE9 INC COM COM 338307101 29,603 7,563 34.31 352 79.59 0.0010
2016-05-02 2016-03-31 13F FIVE9 COM 338307101 22,040 100 0.46 196 2.62 0.0006
2016-02-03 2015-12-31 13F FIVE9 COM 338307101 21,940 2,295 11.68 191 161.64 0.0006
2015-11-04 2015-09-30 13F FIVE9 COM 338307101 19,645 875 4.66 73 -25.51 0.0002
2015-08-04 2015-06-30 13F FIVE9 COM 338307101 18,770 7,535 67.07 98 58.06 0.0003
2015-05-12 2015-03-31 13F FIVE9 COM 338307101 11,235 11,235 62 0.0002
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.