Community Financial System, Inc.
US ˙ NYSE ˙ US2036071064

SecurityCBU / Community Financial System, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,818,395 shares
Latest Disclosed Value $ 106,646,641
Dimensional Fund Advisors Lp reports 1.14% increase in ownership of CBU / Community Financial System, Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 1,818,395 shares of Community Financial System, Inc. (US:CBU) valued at $106,648,867 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 1,797,967 shares of Community Financial System, Inc.. This represents a change in shares of 1.14% during the quarter. The current value of the position is $115,631,738 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)
2026-05-07 2026-03-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,818,395 20,428 1.14 106,647 3.26 0.0048
2026-02-12 2025-12-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,797,967 -18,081 -1.00 103,277 -3.02 0.0217
2025-11-12 2025-09-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,816,048 -9,774 -0.54 106,494 2.56 0.0229
2025-08-12 2025-06-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,825,822 29,138 1.62 103,837 1.64 0.0240
2025-05-13 2025-03-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,796,684 21,975 1.24 102,157 -6.68 0.0254
2025-02-13 2024-12-31 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,774,709 522 0.03 109,466 6.25 0.0263
2024-11-07 2024-09-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,774,187 3,539 0.20 103,024 23.25 0.0250
2024-08-09 2024-06-30 13F COMMUNITY FINANCIAL SYSTEM I COM 203607106 1,770,648 142,909 8.78 83,588 6.92 0.0218
2024-05-10 2024-03-31 13F COMMUNITY BK SYS COM 203607106 1,627,739 45,060 2.85 78,180 -5.21 0.0212
2024-02-07 2023-12-31 13F COMMUNITY BK SYS COM 203607106 1,582,679 91,165 6.11 82,475 31.00 0.0241
2023-11-09 2023-09-30 13F COMMUNITY BK SYS COM 203607106 1,491,514 36,983 2.54 62,958 -7.68 0.0206
2023-08-09 2023-06-30 13F COMMUNITY BK SYS COM 203607106 1,454,531 219,224 17.75 68,193 5.17 0.0217
2023-05-12 2023-03-31 13F COMMUNITY BK SYS COM 203607106 1,235,307 32,218 2.68 64,840 86,352.00 0.0218
2023-02-09 2022-12-31 13F COMMUNITY BK SYS COM 203607106 1,203,089 16,741 1.41 76 -99.89 0.0224
2022-11-10 2022-09-30 13F COMMUNITY BK SYS COM 203607106 1,186,348 2,644 0.22 71,277 -4.84 0.0274
2022-08-12 2022-06-30 13F COMMUNITY BK SYS COM 203607106 1,183,704 10,348 0.88 74,904 -9.00 0.0269
2022-05-13 2022-03-31 13F COMMUNITY BK SYS COM 203607106 1,173,356 42,368 3.75 82,312 -2.28 0.0254
2022-02-09 2021-12-31 13F COMMUNITY BK SYS COM 203607106 1,130,988 16,977 1.52 84,235 10.51 0.0255
2021-11-12 2021-09-30 13F COMMUNITY BK SYS COM 203607106 1,114,011 -6,274 -0.56 76,223 -10.06 0.0246
2021-08-12 2021-06-30 13F COMMUNITY BK SYS COM 203607106 1,120,285 -35,401 -3.06 84,749 -4.42 0.0268
2021-05-14 2021-03-31 13F COMMUNITY BK SYS COM 203607106 1,155,686 -135,222 -10.47 88,668 10.23 0.0293
2021-03-08 2020-12-31 13F/A-2 COMMUNITY BK SYS COM 203607106 1,290,908 -67,540 -4.97 80,436 8.73 0.0290
2021-02-11 2020-12-31 13F COMMUNITY BK SYS COM 203607106 1,290,908 -67,540 80,436 29,049.2078
2020-11-12 2020-09-30 13F COMMUNITY BK SYS COM 203607106 1,358,448 -11,145 -0.81 73,978 -5.27 0.0314
2020-08-13 2020-06-30 13F COMMUNITY BK SYS COM 203607106 1,369,593 -64,423 -4.49 78,090 -7.39 0.0343
2020-05-14 2020-03-31 13F COMMUNITY BK SYS COM 203607106 1,434,016 -98,285 -6.41 84,319 -22.43 0.0439
2020-02-14 2019-12-31 13F COMMUNITY BK SYS COM 203607106 1,532,301 -218,307 -12.47 108,702 0.65 0.0396
2019-11-12 2019-09-30 13F COMMUNITY BK SYS COM 203607106 1,750,608 -112,742 -6.05 107,996 -11.97 0.0420
2019-08-13 2019-06-30 13F COMMUNITY BK SYS COM 203607106 1,863,350 -81,476 -4.19 122,681 5.54 0.0476
2019-08-12 2019-03-31 13F/A-2 COMMUNITY BK SYS COM 203607106 1,944,826 -11,800 -0.60 116,244 1.90 0.0463
2019-05-10 2019-03-31 13F COMMUNITY BK SYS COM 203607106 1,944,826 -11,800 116,244
2019-02-26 2018-12-31 13F/A-1 COMMUNITY BK SYS COM 203607106 1,956,626 14,872 0.77 114,071 -3.80 0.0517
2019-02-13 2018-12-31 13F COMMUNITY BK SYS COM 203607106 1,956,626 14,872 114,071
2018-11-13 2018-09-30 13F COMMUNITY BK SYS COM 203607106 1,941,754 -39,094 -1.97 118,582 1.34 0.0451
2018-08-10 2018-06-30 13F COMMUNITY BK SYS COM 203607106 1,980,848 -24,266 -1.21 117,010 8.95 0.0466
2018-05-11 2018-03-31 13F COMMUNITY BK SYS COM 203607106 2,005,114 17,552 0.88 107,394 0.53 0.0448
2018-02-12 2017-12-31 13F COMMUNITY BK SYS COM 203607106 1,987,562 90,909 4.79 106,833 1.95 0.0443
2017-11-13 2017-09-30 13F COMMUNITY BK SYS COM 203607106 1,896,653 21,213 1.13 104,789 0.19 0.0458
2017-08-11 2017-06-30 13F COMMUNITY BK SYS COM 203607106 1,875,440 -44,531 -2.32 104,595 -0.92 0.0483
2017-05-12 2017-03-31 13F COMMUNITY BK SYS COM 203607106 1,919,971 -38,529 -1.97 105,561 -12.77 0.0505
2017-02-09 2016-12-31 13F COMMUNITY BK SYS COM 203607106 1,958,500 29,715 1.54 121,016 30.42 0.0604
2016-11-10 2016-09-30 13F COMMUNITY BK SYS COM 203607106 1,928,785 19,689 1.03 92,792 18.29 0.0502
2016-08-09 2016-06-30 13F COMMUNITY BK SYS COM 203607106 1,909,096 108,621 6.03 78,443 14.02 0.0451
2016-05-13 2016-03-31 13F COMMUNITY BK SYS COM 203607106 1,800,475 47,585 2.71 68,797 -1.74 0.0412
2016-02-10 2015-12-31 13F COMMUNITY BK SYS COM 203607106 1,752,890 80,788 4.83 70,012 12.65 0.0436
2015-11-13 2015-09-30 13F COMMUNITY BK SYS COM 203607106 1,672,102 71,025 4.44 62,152 2.78 0.0408
2015-08-14 2015-06-30 13F COMMUNITY BK SYS COM 203607106 1,601,077 46,161 2.97 60,473 9.89 0.0370
2015-05-14 2015-03-31 13F COMMUNITY BK SYS COM 203607106 1,554,916 103,387 7.12 55,028 -0.58 0.0347
2015-02-06 2014-12-31 13F COMMUNITY BK SYS COM 203607106 1,451,529 62,274 4.48 55,348 18.60 0.0364
2014-11-13 2014-09-30 13F COMMUNITY BK SYS COM 203607106 1,389,255 75,693 5.76 46,666 -1.86 0.0331
2014-08-08 2014-06-30 13F COMMUNITY BK SYS COM 203607106 1,313,562 33,535 2.62 47,551 -4.79 0.0331
2014-05-14 2014-03-31 13F COMMUNITY BK SYS COM 203607106 1,280,027 23,372 1.86 49,945 0.16 0.0373
2014-02-12 2013-12-31 13F COMMUNITY BK SYS COM 203607106 1,256,655 34,113 2.79 49,864 19.54 0.0389
2013-11-13 2013-09-30 13F COMMUNITY BK SYS COM 203607106 1,222,542 -9,297 -0.75 41,712 9.76 0.0361
2013-08-15 2013-06-30 13F COMMUNITY BK SYS COM 203607106 1,231,839 1,231,839 38,002 0.0358
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.