NBT BANCORP INC

Ticker: NBTB CUSIP: 628778102 Class: COM

CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM's Holding History (CIK: 0001081019)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 50,257 Value ($000) $2,087 Avg Close $41.57 Range $39.20 - $44.67

Q3 2025

Shares 48,912 Value ($000) $2,043 Avg Close $42.90 Range $40.08 - $45.28

Q2 2025

Shares 43,842 Value ($000) $1,822 Avg Close $41.63 Range $37.31 - $45.56

Q1 2025

Shares 43,069 Value ($000) $1,848 Avg Close $46.21 Range $42.24 - $49.18

Q4 2024

Shares 44,025 Value ($000) $2,103 Avg Close $47.59 Range $42.16 - $52.44

Q3 2024

Shares 44,524 Value ($000) $1,969 Avg Close $45.13 Range $37.34 - $50.84

Q2 2024

Shares 45,936 Value ($000) $1,773 Avg Close $36.15 Range $32.93 - $39.08

Q1 2024

Shares 46,957 Value ($000) $1,722 Avg Close $36.19 Range $32.79 - $42.87

Q4 2023

Shares 49,484 Value ($000) $2,074 Avg Close $36.13 Range $30.36 - $43.77

Q3 2023

Shares 51,870 Value ($000) $1,644 Avg Close $34.24 Range $30.31 - $38.11

Q2 2023

Shares 50,476 Value ($000) $1,608 Avg Close $33.45 Range $27.53 - $37.28

Q1 2023

Shares 53,193 Value ($000) $1,793 Avg Close $39.21 Range $33.00 - $45.02

Q4 2022

Shares 53,973 Value ($000) $2,344 Avg Close $44.11 Range $38.13 - $48.68

Q3 2022

Shares 53,368 Value ($000) $2,025 Avg Close $39.49 Range $36.80 - $42.63

Q2 2022

Shares 54,800 Value ($000) $2,060 Avg Close $36.25 Range $34.58 - $38.64

Q1 2022

Shares 54,775 Value ($000) $1,979 Avg Close $38.86 Range $35.98 - $42.33

Q4 2021

Shares 59,443 Value ($000) $2,290 Avg Close $37.32 Range $35.57 - $38.97

Q3 2021

Shares 58,675 Value ($000) $2,119 Avg Close $35.10 Range $32.66 - $37.65

Q2 2021

Shares 58,298 Value ($000) $2,097 Avg Close $38.65 Range $35.84 - $41.07

Q1 2021

Shares 64,111 Value ($000) $2,558 Avg Close $36.78 Range $31.02 - $42.79

Q4 2020

Shares 64,111 Value ($000) $2,058 Avg Close $29.94 Range $26.10 - $33.03

Q3 2020

Shares 64,893 Value ($000) $1,740 Avg Close $29.66 Range $26.31 - $33.02

Q2 2020

Shares 64,893 Value ($000) $1,996 Avg Close $31.14 Range $26.32 - $35.92

Q1 2020

Shares 64,893 Value ($000) $2,102 Avg Close $36.63 Range $27.54 - $41.27

Q4 2019

Shares 65,215 Value ($000) $2,645 Avg Close $39.21 Range $35.44 - $41.50

Q3 2019

Shares 66,532 Value ($000) $2,434 Avg Close $36.62 Range $34.12 - $39.20

Q2 2019

Shares 65,737 Value ($000) $2,466 Avg Close $37.17 Range $35.63 - $39.28

Q1 2019

Shares 65,267 Value ($000) $2,350 Avg Close $36.89 Range $34.09 - $39.58

Q4 2018

Shares 66,718 Value ($000) $2,308 Avg Close $36.73 Range $30.36 - $39.25

Q3 2018

Shares 65,214 Value ($000) $2,503 Avg Close $39.84 Range $37.85 - $41.88

Q2 2018

Shares 65,237 Value ($000) $2,489 Avg Close $37.72 Range $34.60 - $40.24

Q1 2018

Shares 65,014 Value ($000) $2,307 Avg Close $36.65 Range $34.05 - $38.77

Q4 2017

Shares 67,294 Value ($000) $2,476 Avg Close $37.72 Range $35.18 - $40.47

Q3 2017

Shares 68,236 Value ($000) $2,506 Avg Close $34.92 Range $31.28 - $38.03

Q2 2017

Shares 75,594 Value ($000) $2,793 Avg Close $37.13 Range $34.80 - $40.85

Q1 2017

Shares 83,541 Value ($000) $3,097 Avg Close $40.32 Range $35.96 - $42.56

Q4 2016

Shares 87,441 Value ($000) $3,662 Avg Close $37.18 Range $32.26 - $42.49

Q3 2016

Shares 89,841 Value ($000) $2,953 Avg Close $30.96 Range $27.31 - $33.04

Q2 2016

Shares 88,941 Value ($000) $2,546 Avg Close $28.12 Range $25.67 - $29.55

Q1 2016

Shares 93,605 Value ($000) $2,523 Avg Close $25.99 Range $23.81 - $27.50

Q4 2015

Shares 81,643 Value ($000) $2,276 Avg Close $28.46 Range $25.58 - $30.53

Q3 2015

Shares 80,353 Value ($000) $2,165 Avg Close $26.48 Range $24.91 - $27.72

Q2 2015

Shares 80,453 Value ($000) $2,105 Avg Close $25.14 Range $23.75 - $26.89

Q1 2015

Shares 79,700 Value ($000) $1,997 Avg Close $24.35 Range $22.97 - $26.46

Q4 2014

Shares 81,000 Value ($000) $2,128 Avg Close $24.68 Range $22.22 - $26.88

Q3 2014

Shares 80,655 Value ($000) $1,816 Avg Close $23.68 Range $22.50 - $24.81

Q2 2014

Shares 79,797 Value ($000) $1,917 Avg Close $23.32 Range $21.67 - $25.18

Q1 2014

Shares 79,597 Value ($000) $1,947 Avg Close $24.19 Range $22.35 - $25.81

Q4 2013

Shares 79,297 Value ($000) $2,054 Avg Close $24.54 Range $22.09 - $26.59

Q3 2013

Shares 78,797 Value ($000) $1,811 Avg Close $22.35 Range $21.06 - $23.25

Q2 2013

Shares 76,318 Value ($000) $1,616 Avg Close $20.54 Range $19.45 - $22.23

Q1 2013

Shares 76,302 Value ($000) $1,690 Avg Close $21.13 Range $20.15 - $22.37

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	50,257	$2,087	$41.57	$39.20 - $44.67
Q3 2025	48,912	$2,043	$42.90	$40.08 - $45.28
Q2 2025	43,842	$1,822	$41.63	$37.31 - $45.56
Q1 2025	43,069	$1,848	$46.21	$42.24 - $49.18
Q4 2024	44,025	$2,103	$47.59	$42.16 - $52.44
Q3 2024	44,524	$1,969	$45.13	$37.34 - $50.84
Q2 2024	45,936	$1,773	$36.15	$32.93 - $39.08
Q1 2024	46,957	$1,722	$36.19	$32.79 - $42.87
Q4 2023	49,484	$2,074	$36.13	$30.36 - $43.77
Q3 2023	51,870	$1,644	$34.24	$30.31 - $38.11
Q2 2023	50,476	$1,608	$33.45	$27.53 - $37.28
Q1 2023	53,193	$1,793	$39.21	$33.00 - $45.02
Q4 2022	53,973	$2,344	$44.11	$38.13 - $48.68
Q3 2022	53,368	$2,025	$39.49	$36.80 - $42.63
Q2 2022	54,800	$2,060	$36.25	$34.58 - $38.64
Q1 2022	54,775	$1,979	$38.86	$35.98 - $42.33
Q4 2021	59,443	$2,290	$37.32	$35.57 - $38.97
Q3 2021	58,675	$2,119	$35.10	$32.66 - $37.65
Q2 2021	58,298	$2,097	$38.65	$35.84 - $41.07
Q1 2021	64,111	$2,558	$36.78	$31.02 - $42.79
Q4 2020	64,111	$2,058	$29.94	$26.10 - $33.03
Q3 2020	64,893	$1,740	$29.66	$26.31 - $33.02
Q2 2020	64,893	$1,996	$31.14	$26.32 - $35.92
Q1 2020	64,893	$2,102	$36.63	$27.54 - $41.27
Q4 2019	65,215	$2,645	$39.21	$35.44 - $41.50
Q3 2019	66,532	$2,434	$36.62	$34.12 - $39.20
Q2 2019	65,737	$2,466	$37.17	$35.63 - $39.28
Q1 2019	65,267	$2,350	$36.89	$34.09 - $39.58
Q4 2018	66,718	$2,308	$36.73	$30.36 - $39.25
Q3 2018	65,214	$2,503	$39.84	$37.85 - $41.88
Q2 2018	65,237	$2,489	$37.72	$34.60 - $40.24
Q1 2018	65,014	$2,307	$36.65	$34.05 - $38.77
Q4 2017	67,294	$2,476	$37.72	$35.18 - $40.47
Q3 2017	68,236	$2,506	$34.92	$31.28 - $38.03
Q2 2017	75,594	$2,793	$37.13	$34.80 - $40.85
Q1 2017	83,541	$3,097	$40.32	$35.96 - $42.56
Q4 2016	87,441	$3,662	$37.18	$32.26 - $42.49
Q3 2016	89,841	$2,953	$30.96	$27.31 - $33.04
Q2 2016	88,941	$2,546	$28.12	$25.67 - $29.55
Q1 2016	93,605	$2,523	$25.99	$23.81 - $27.50
Q4 2015	81,643	$2,276	$28.46	$25.58 - $30.53
Q3 2015	80,353	$2,165	$26.48	$24.91 - $27.72
Q2 2015	80,453	$2,105	$25.14	$23.75 - $26.89
Q1 2015	79,700	$1,997	$24.35	$22.97 - $26.46
Q4 2014	81,000	$2,128	$24.68	$22.22 - $26.88
Q3 2014	80,655	$1,816	$23.68	$22.50 - $24.81
Q2 2014	79,797	$1,917	$23.32	$21.67 - $25.18
Q1 2014	79,597	$1,947	$24.19	$22.35 - $25.81
Q4 2013	79,297	$2,054	$24.54	$22.09 - $26.59
Q3 2013	78,797	$1,811	$22.35	$21.06 - $23.25
Q2 2013	76,318	$1,616	$20.54	$19.45 - $22.23
Q1 2013	76,302	$1,690	$21.13	$20.15 - $22.37