Community Financial System, Inc.
US ˙ NYSE ˙ US2036071064

SecurityCBU / Community Financial System, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership620,512 shares
Latest Disclosed Value $ 36,393,028
Northern Trust Corp reports 2.84% increase in ownership of CBU / Community Financial System, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 620,512 shares of Community Financial System, Inc. (US:CBU) valued at $36,393,029 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 603,397 shares of Community Financial System, Inc.. This represents a change in shares of 2.84% during the quarter. The current value of the position is $39,371,486 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)
2026-05-14 2026-03-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 620,512 17,115 2.84 36,393 5.00 0.0010
2026-02-17 2025-12-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 603,397 -39,193 -6.10 34,659 -8.02 0.0044
2025-11-14 2025-09-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 642,590 -5,397 -0.83 37,681 2.25 0.0048
2025-08-13 2025-06-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 647,987 -19,073 -2.86 36,851 -2.84 0.0051
2025-05-13 2025-03-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 667,060 -10,781 -1.59 37,929 -9.28 0.0056
2025-02-14 2024-12-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 677,841 145,172 27.25 41,809 35.16 0.0059
2024-11-13 2024-09-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 532,669 -6,669 -1.24 30,932 21.48 0.0051
2024-08-14 2024-06-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 539,338 -17,121 -3.08 25,462 -4.73 0.0043
2024-05-14 2024-03-31 13F COMMUNITY BK SYS COM 203607106 556,459 -13,061 -2.29 26,727 -9.94 0.0046
2024-02-13 2023-12-31 13F COMMUNITY BK SYS COM 203607106 569,520 -5,096 -0.89 29,678 22.36 0.0054
2023-11-13 2023-09-30 13F COMMUNITY BK SYS COM 203607106 574,616 -4,285 -0.74 24,255 -10.63 0.0047
2023-08-11 2023-06-30 13F COMMUNITY BK SYS COM 203607106 578,901 -5,369 -0.92 27,139 -11.51 0.0052
2023-05-15 2023-03-31 13F COMMUNITY BK SYS COM 203607106 584,270 -6,643 -1.12 30,668 -17.55 0.0061
2023-02-13 2022-12-31 13F COMMUNITY BK SYS COM 203607106 590,913 10,383 1.79 37,198 6.65 0.0078
2022-11-14 2022-09-30 13F COMMUNITY BK SYS COM 203607106 580,530 -2,385 -0.41 34,879 -5.44 0.0080
2022-08-12 2022-06-30 13F COMMUNITY BK SYS COM 203607106 582,915 -7,328 -1.24 36,886 -10.91 0.0079
2022-05-13 2022-03-31 13F COMMUNITY BK SYS COM 203607106 590,243 -16,411 -2.71 41,405 -8.36 0.0073
2022-02-08 2021-12-31 13F COMMUNITY BK SYS COM 203607106 606,654 1,081 0.18 45,183 9.05 0.0074
2021-11-15 2021-09-30 13F COMMUNITY BK SYS COM 203607106 605,573 -8,076 -1.32 41,432 -10.75 0.0073
2021-08-13 2021-06-30 13F COMMUNITY BK SYS COM 203607106 613,649 3,275 0.54 46,423 -0.86 0.0082
2021-05-12 2021-03-31 13F COMMUNITY BK SYS COM 203607106 610,374 -51,876 -7.83 46,828 13.48 0.0087
2021-02-11 2020-12-31 13F COMMUNITY BK SYS COM 203607106 662,250 -395,568 -37.39 41,265 -28.37 0.0080
2020-11-16 2020-09-30 13F COMMUNITY BK SYS COM 203607106 1,057,818 -13,223 -1.23 57,609 -5.67 0.0126
2020-08-14 2020-06-30 13F COMMUNITY BK SYS COM 203607106 1,071,041 -1,513 -0.14 61,071 -3.16 0.0145
2020-05-14 2020-03-31 13F COMMUNITY BK SYS COM 203607106 1,072,554 3,018 0.28 63,066 -16.88 0.0181
2020-02-14 2019-12-31 13F COMMUNITY BK SYS COM 203607106 1,069,536 -6,924 -0.64 75,873 14.26 0.0170
2019-11-13 2019-09-30 13F COMMUNITY BK SYS COM 203607106 1,076,460 23,949 2.28 66,406 -4.17 0.0159
2019-08-13 2019-06-30 13F COMMUNITY BK SYS COM 203607106 1,052,511 19,662 1.90 69,298 12.25 0.0164
2019-05-13 2019-03-31 13F COMMUNITY BK SYS COM 203607106 1,032,849 -3,855 -0.37 61,733 2.14 0.0152
2019-02-12 2018-12-31 13F COMMUNITY BK SYS COM 203607106 1,036,704 -229,949 -18.15 60,440 -21.86 0.0170
2018-11-14 2018-09-30 13F COMMUNITY BK SYS COM 203607106 1,266,653 -204,548 -13.90 77,353 -10.99 0.0189
2018-09-18 2018-06-30 13F/A-1 COMMUNITY BK SYS COM 203607106 1,471,201 15,214 1.04 86,904 11.44 0.0221
2018-08-14 2018-06-30 13F COMMUNITY BK SYS COM 203607106 1,474,455 18,468 87,097
2018-05-09 2018-03-31 13F COMMUNITY BK SYS COM 203607106 1,455,987 6,234 0.43 77,984 0.07 0.0203
2018-02-14 2017-12-31 13F COMMUNITY BK SYS COM 203607106 1,449,753 -14,634 -1.00 77,926 -3.69 0.0197
2017-11-13 2017-09-30 13F COMMUNITY BK SYS COM 203607106 1,464,387 4,642 0.32 80,908 -0.62 0.0211
2017-08-11 2017-06-30 13F COMMUNITY BK SYS COM 203607106 1,459,745 92,700 6.78 81,410 8.32 0.0228
2017-05-12 2017-03-31 13F COMMUNITY BK SYS COM 203607106 1,367,045 7,549 0.56 75,159 -10.53 0.0217
2017-02-13 2016-12-31 13F COMMUNITY BK SYS COM 203607106 1,359,496 21,871 1.64 84,004 30.54 0.0258
2016-11-09 2016-09-30 13F COMMUNITY BK SYS COM 203607106 1,337,625 14,407 1.09 64,353 18.36 0.0200
2016-08-12 2016-06-30 13F COMMUNITY BK SYS COM 203607106 1,323,218 13,089 1.00 54,371 8.64 0.0177
2016-08-19 2016-03-31 13F/A-1 COMMUNITY BK SYS COM 203607106 1,310,129 -17,674 -1.33 50,049 -5.63 0.0166
2016-05-13 2016-03-31 13F Community Bk Sys COMM 203607106 1,310,129 50,059
2016-02-12 2015-12-31 13F Community Bk Sys COMM 203607106 1,327,803 -18,767 -1.39 53,033 5.95 0.0176
2015-11-12 2015-09-30 13F Community Bk Sys COMM 203607106 1,346,570 69,435 5.44 50,053 3.76 0.0167
2015-08-13 2015-06-30 13F COMMUNITY BK SYS COM 203607106 1,277,135 -16,228 -1.25 48,237 5.39 0.0327
2015-08-13 2015-06-30 13F Community Bk Sys COMM 020360710 50,660 -1,242,703 1,913 0.0013
2015-05-14 2015-03-31 13F Community Bk Sys COMM 203607106 1,293,363 76,596 6.30 45,772 -1.34 0.0138
2015-02-12 2014-12-31 13F Community Bk Sys COM 203607106 1,216,767 -15,587 -1.26 46,396 12.08 0.0140
2014-11-13 2014-09-30 13F Community Bk Sys COMM 203607106 1,232,354 39,484 3.31 41,394 -4.14 0.0130
2014-08-14 2014-06-30 13F COMMUNITY BK SYS com 203607106 1,192,870 -56,778 -4.54 43,181 -11.44 0.0135
2014-05-14 2014-03-31 13F COMMUNITY BK SYS COMM 203607106 1,249,648 -7,642 -0.61 48,760 -2.26 0.0153
2014-02-21 2013-12-31 13F/A-1 COMMUNITY BK SYS COM 203607106 1,257,290 -6,019 -0.48 49,889 15.74 0.0160
2014-02-12 2013-12-31 13F COMMUNITY BK SYS COM 203607106 1,257,290 49,889
2013-11-13 2013-09-30 13F COMMUNITY BK SYS COM 203607106 1,263,309 27,156 2.20 43,104 13.03 0.0152
2013-08-09 2013-06-30 13F COMMUNITY BK SYS COM 203607106 1,236,153 1,236,153 38,136 0.0138
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.