AVISTA CORP

Ticker: AVA CUSIP: 05379B107 Class: Common Stock

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

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

Q4 2025

Shares 76,893 Value ($000) $2,963 Avg Close $38.78 Range $36.05 - $41.60

Q3 2025

Shares 78,718 Value ($000) $2,976 Avg Close $36.47 Range $34.98 - $37.71

Q2 2025

Shares 78,714 Value ($000) $2,987 Avg Close $38.22 Range $35.57 - $41.49

Q1 2025

Shares 78,335 Value ($000) $3,280 Avg Close $36.27 Range $33.08 - $40.42

Q4 2024

Shares 73,548 Value ($000) $2,694 Avg Close $35.43 Range $33.54 - $37.30

Q3 2024

Shares 73,972 Value ($000) $2,866 Avg Close $35.26 Range $31.03 - $37.17

Q2 2024

Shares 76,400 Value ($000) $2,644 Avg Close $32.90 Range $30.23 - $35.65

Q1 2024

Shares 77,411 Value ($000) $2,711 Avg Close $30.96 Range $28.83 - $33.10

Q4 2023

Shares 80,774 Value ($000) $2,887 Avg Close $30.40 Range $27.22 - $33.43

Q3 2023

Shares 83,643 Value ($000) $2,708 Avg Close $31.62 Range $28.30 - $35.30

Q2 2023

Shares 91,363 Value ($000) $3,588 Avg Close $37.05 Range $33.57 - $39.26

Q1 2023

Shares 92,267 Value ($000) $3,917 Avg Close $35.81 Range $33.61 - $38.95

Q4 2022

Shares 92,956 Value ($000) $4,122 Avg Close $34.22 Range $30.37 - $38.57

Q3 2022

Shares 90,943 Value ($000) $3,369 Avg Close $35.39 Range $31.48 - $38.26

Q2 2022

Shares 91,634 Value ($000) $3,987 Avg Close $35.99 Range $32.85 - $38.84

Q1 2022

Shares 90,451 Value ($000) $4,084 Avg Close $36.52 Range $34.56 - $39.09

Q4 2021

Shares 97,413 Value ($000) $4,139 Avg Close $32.99 Range $30.79 - $35.25

Q3 2021

Shares 94,215 Value ($000) $3,686 Avg Close $34.00 Range $31.82 - $35.77

Q2 2021

Shares 95,579 Value ($000) $4,078 Avg Close $36.84 Range $34.08 - $39.14

Q1 2021

Shares 103,708 Value ($000) $4,952 Avg Close $32.79 Range $29.04 - $39.34

Q4 2020

Shares 104,020 Value ($000) $4,175 Avg Close $28.86 Range $25.27 - $32.25

Q3 2020

Shares 101,783 Value ($000) $3,473 Avg Close $28.20 Range $25.81 - $29.90

Q2 2020

Shares 101,216 Value ($000) $3,683 Avg Close $30.48 Range $25.82 - $35.07

Q1 2020

Shares 101,216 Value ($000) $4,301 Avg Close $36.73 Range $24.60 - $40.62

Q4 2019

Shares 101,718 Value ($000) $4,892 Avg Close $36.05 Range $34.67 - $37.62

Q3 2019

Shares 102,281 Value ($000) $4,954 Avg Close $34.88 Range $32.92 - $37.21

Q2 2019

Shares 101,059 Value ($000) $4,507 Avg Close $31.69 Range $29.92 - $33.70

Q1 2019

Shares 100,398 Value ($000) $4,078 Avg Close $30.30 Range $29.30 - $31.80

Q4 2018

Shares 102,823 Value ($000) $4,368 Avg Close $36.19 Range $30.77 - $38.41

Q3 2018

Shares 100,316 Value ($000) $5,072 Avg Close $37.08 Range $35.90 - $38.29

Q2 2018

Shares 100,352 Value ($000) $5,285 Avg Close $37.64 Range $36.23 - $38.27

Q1 2018

Shares 98,088 Value ($000) $5,027 Avg Close $36.12 Range $34.13 - $37.40

Q4 2017

Shares 101,527 Value ($000) $5,228 Avg Close $36.82 Range $36.30 - $37.16

Q3 2017

Shares 103,125 Value ($000) $5,339 Avg Close $35.25 Range $28.98 - $37.15

Q2 2017

Shares 114,052 Value ($000) $4,843 Avg Close $29.21 Range $26.74 - $31.26

Q1 2017

Shares 124,730 Value ($000) $4,871 Avg Close $27.19 Range $26.10 - $28.15

Q4 2016

Shares 130,630 Value ($000) $5,224 Avg Close $27.83 Range $26.71 - $29.71

Q3 2016

Shares 134,230 Value ($000) $5,609 Avg Close $28.97 Range $27.56 - $30.72

Q2 2016

Shares 133,030 Value ($000) $5,960 Avg Close $27.70 Range $25.92 - $30.44

Q1 2016

Shares 132,354 Value ($000) $5,397 Avg Close $25.24 Range $22.90 - $27.82

Q4 2015

Shares 115,444 Value ($000) $4,083 Avg Close $22.74 Range $21.53 - $25.21

Q3 2015

Shares 113,535 Value ($000) $3,775 Avg Close $20.96 Range $19.68 - $22.33

Q2 2015

Shares 113,735 Value ($000) $3,486 Avg Close $20.96 Range $19.69 - $22.33

Q1 2015

Shares 110,100 Value ($000) $3,763 Avg Close $22.48 Range $20.78 - $24.58

Q4 2014

Shares 111,900 Value ($000) $3,956 Avg Close $21.73 Range $19.40 - $23.96

Q3 2014

Shares 111,125 Value ($000) $3,393 Avg Close $20.15 Range $19.08 - $21.13

Q2 2014

Shares 109,894 Value ($000) $3,684 Avg Close $19.80 Range $18.69 - $21.12

Q1 2014

Shares 108,894 Value ($000) $3,338 Avg Close $18.00 Range $17.07 - $19.19

Q4 2013

Shares 108,494 Value ($000) $3,058 Avg Close $16.79 Range $15.77 - $17.52

Q3 2013

Shares 107,794 Value ($000) $2,846 Avg Close $16.58 Range $15.56 - $17.59

Q2 2013

Shares 104,415 Value ($000) $2,821 Avg Close $16.44 Range $15.47 - $17.44

Q1 2013

Shares 102,046 Value ($000) $2,796 Avg Close $15.28 Range $14.20 - $16.38

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	76,893	$2,963	$38.78	$36.05 - $41.60
Q3 2025	78,718	$2,976	$36.47	$34.98 - $37.71
Q2 2025	78,714	$2,987	$38.22	$35.57 - $41.49
Q1 2025	78,335	$3,280	$36.27	$33.08 - $40.42
Q4 2024	73,548	$2,694	$35.43	$33.54 - $37.30
Q3 2024	73,972	$2,866	$35.26	$31.03 - $37.17
Q2 2024	76,400	$2,644	$32.90	$30.23 - $35.65
Q1 2024	77,411	$2,711	$30.96	$28.83 - $33.10
Q4 2023	80,774	$2,887	$30.40	$27.22 - $33.43
Q3 2023	83,643	$2,708	$31.62	$28.30 - $35.30
Q2 2023	91,363	$3,588	$37.05	$33.57 - $39.26
Q1 2023	92,267	$3,917	$35.81	$33.61 - $38.95
Q4 2022	92,956	$4,122	$34.22	$30.37 - $38.57
Q3 2022	90,943	$3,369	$35.39	$31.48 - $38.26
Q2 2022	91,634	$3,987	$35.99	$32.85 - $38.84
Q1 2022	90,451	$4,084	$36.52	$34.56 - $39.09
Q4 2021	97,413	$4,139	$32.99	$30.79 - $35.25
Q3 2021	94,215	$3,686	$34.00	$31.82 - $35.77
Q2 2021	95,579	$4,078	$36.84	$34.08 - $39.14
Q1 2021	103,708	$4,952	$32.79	$29.04 - $39.34
Q4 2020	104,020	$4,175	$28.86	$25.27 - $32.25
Q3 2020	101,783	$3,473	$28.20	$25.81 - $29.90
Q2 2020	101,216	$3,683	$30.48	$25.82 - $35.07
Q1 2020	101,216	$4,301	$36.73	$24.60 - $40.62
Q4 2019	101,718	$4,892	$36.05	$34.67 - $37.62
Q3 2019	102,281	$4,954	$34.88	$32.92 - $37.21
Q2 2019	101,059	$4,507	$31.69	$29.92 - $33.70
Q1 2019	100,398	$4,078	$30.30	$29.30 - $31.80
Q4 2018	102,823	$4,368	$36.19	$30.77 - $38.41
Q3 2018	100,316	$5,072	$37.08	$35.90 - $38.29
Q2 2018	100,352	$5,285	$37.64	$36.23 - $38.27
Q1 2018	98,088	$5,027	$36.12	$34.13 - $37.40
Q4 2017	101,527	$5,228	$36.82	$36.30 - $37.16
Q3 2017	103,125	$5,339	$35.25	$28.98 - $37.15
Q2 2017	114,052	$4,843	$29.21	$26.74 - $31.26
Q1 2017	124,730	$4,871	$27.19	$26.10 - $28.15
Q4 2016	130,630	$5,224	$27.83	$26.71 - $29.71
Q3 2016	134,230	$5,609	$28.97	$27.56 - $30.72
Q2 2016	133,030	$5,960	$27.70	$25.92 - $30.44
Q1 2016	132,354	$5,397	$25.24	$22.90 - $27.82
Q4 2015	115,444	$4,083	$22.74	$21.53 - $25.21
Q3 2015	113,535	$3,775	$20.96	$19.68 - $22.33
Q2 2015	113,735	$3,486	$20.96	$19.69 - $22.33
Q1 2015	110,100	$3,763	$22.48	$20.78 - $24.58
Q4 2014	111,900	$3,956	$21.73	$19.40 - $23.96
Q3 2014	111,125	$3,393	$20.15	$19.08 - $21.13
Q2 2014	109,894	$3,684	$19.80	$18.69 - $21.12
Q1 2014	108,894	$3,338	$18.00	$17.07 - $19.19
Q4 2013	108,494	$3,058	$16.79	$15.77 - $17.52
Q3 2013	107,794	$2,846	$16.58	$15.56 - $17.59
Q2 2013	104,415	$2,821	$16.44	$15.47 - $17.44
Q1 2013	102,046	$2,796	$15.28	$14.20 - $16.38