NBT Bancorp Inc.
US ˙ NasdaqGS ˙ US6287781024

SecurityNBTB / NBT Bancorp Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership15,029 shares
Latest Disclosed Value $ 640
Amalgamated Bank reports 1.03% decrease in ownership of NBTB / NBT Bancorp Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 15,029 shares of NBT Bancorp Inc. (US:NBTB) valued at $639,935 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 15,186 shares of NBT Bancorp Inc.. The current value of the position is $673,149 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)
2026-05-08 2026-03-31 13F NBT BANCORP COM 628778102 15,029 -157 -1.03 1 0.0049
2026-02-05 2025-12-31 13F NBT BANCORP COM 628778102 15,186 193 1.29 1 0.0046
2025-10-29 2025-09-30 13F NBT BANCORP COM 628778102 14,993 282 1.92 1 0.0045
2025-08-04 2025-06-30 13F NBT BANCORP COM 628778102 14,711 1,254 9.32 1 0.0047
2025-04-25 2025-03-31 13F N B T BANCORP COM 628778102 13,457 -382 -2.76 1 0.0049
2025-02-04 2024-12-31 13F N B T BANCORP COM 628778102 13,839 0 0.00 1 0.0054
2024-10-30 2024-09-30 13F N B T BANCORP COM 628778102 13,839 -522 -3.63 1 0.0050
2024-08-12 2024-06-30 13F N B T BANCORP COM 628778102 14,361 -332 -2.26 1 0.0047
2024-04-23 2024-03-31 13F N B T BANCORP COM 628778102 14,693 -2,731 -15.67 1 0.0046
2024-02-06 2023-12-31 13F N B T BANCORP COM 628778102 17,424 -870 -4.76 1 0.0058
2023-11-08 2023-09-30 13F N B T BANCORP COM 628778102 18,294 1,163 6.79 1 0.0049
2023-08-11 2023-06-30 13F N B T BANCORP COM 628778102 17,131 -770 -4.30 1 0.0044
2023-05-02 2023-03-31 13F N B T BANCORP COM 628778102 17,901 -1,564 -8.03 1 0.0051
2023-02-10 2022-12-31 13F N B T BANCORP COM 628778102 19,465 209 1.09 1 -100.00 0.0075
2022-11-09 2022-09-30 13F N B T BANCORP COM 628778102 19,256 122 0.64 731 1.67 0.0071
2022-08-15 2022-06-30 13F N B T BANCORP COM 628778102 19,134 -180 -0.93 719 3.01 0.0067
2022-08-25 2022-03-31 13F/A-1 N B T BANCORP COM 628778102 19,314 -983 -4.84 698 -10.74 0.0054
2022-06-30 2022-03-31 13F N B T BANCORP COM 628778102 19,314 -983 698 0.0055
2022-02-15 2021-12-31 13F/A-1 N B T BANCORP COM 628778102 20,297 -186 -0.91 782 5.68 0.0058
2022-02-15 2021-12-31 13F N B T BANCORP COM 628778102 20,297 -186 782 0.0058
2021-10-29 2021-09-30 13F N B T BANCORP COM 628778102 20,483 -858 -4.02 740 -3.65 0.0062
2021-08-16 2021-06-30 13F N B T BANCORP COM 628778102 21,341 21,341 768 0.0062
2020-08-10 2020-06-30 13F N B T BANCORP COM 628778102 0 -6,951 -100.00 0 -100.00
2020-05-13 2020-03-31 13F N B T BANCORP COM 628778102 6,951 -142 -2.00 225 -21.87 0.0055
2020-02-13 2019-12-31 13F N B T BANCORP COM 628778102 7,093 540 8.24 288 20.00 0.0053
2019-11-13 2019-09-30 13F N B T BANCORP COM 628778102 6,553 -159 -2.37 240 -4.76 0.0050
2019-08-14 2019-06-30 13F N B T BANCORP COM 628778102 6,712 450 7.19 252 12.00 0.0059
2019-05-15 2019-03-31 13F N B T BANCORP COM 628778102 6,262 209 3.45 225 7.66 0.0055
2019-02-15 2018-12-31 13F N B T BANCORP COM 628778102 6,053 -119 -1.93 209 -11.81 0.0059
2018-11-14 2018-09-30 13F N B T BANCORP COM 628778102 6,172 -58 -0.93 237 -0.42 0.0059
2018-07-18 2018-06-30 13F N B T BANCORP COM 628778102 6,230 165 2.72 238 10.70 0.0058
2018-05-22 2018-03-31 13F N B T BANCORP COM 628778102 6,065 -94 -1.53 215 -5.29 0.0057
2018-02-13 2017-12-31 13F N B T BANCORP COM 628778102 6,159 412 7.17 227 7.58 0.0061
2017-11-09 2017-09-30 13F N B T BANCORP COM 628778102 5,747 -67 -1.15 211 -1.86 0.0066
2017-08-10 2017-06-30 13F N B T BANCORP COM 628778102 5,814 66 1.15 215 0.94 0.0070
2017-05-12 2017-03-31 13F N B T BANCORP COM 628778102 5,748 -2 -0.03 213 -11.62 0.0106
2017-02-14 2016-12-31 13F N B T BANCORP COM 628778102 5,750 5,750 241 0.0109
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.