Pinnacle West Capital Corporation
US ˙ NYSE ˙ US7234841010

SecurityPNW / Pinnacle West Capital Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership146,727 shares
Latest Disclosed Value $ 13,012,575
Sei Investments Co ownership in PNW / Pinnacle West Capital Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 146,727 shares of Pinnacle West Capital Corporation (US:PNW) valued at $13,014,685 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 121,592 shares of Pinnacle West Capital Corporation. This represents a change in shares of 20.67% during the quarter. The current value of the position is $14,583,197 USD.

Sei Investments Co has a history of taking positions in derivatives of the underlying security (PNW) in the form of stock options.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

PNW / Pinnacle West Capital Corporation Historical Put/Call Ratio
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)
2026-02-13 2025-12-31 13F PINNACLE WEST CAP COM 723484101 146,727 25,135 20.67 13,013 19.31 0.0128
2025-11-13 2025-09-30 13F PINNACLE WEST CAP COM 723484101 121,592 -8,568 -6.58 10,906 -6.37 0.0117
2025-08-14 2025-06-30 13F PINNACLE WEST CAP COM 723484101 130,160 14,923 12.95 11,648 6.11 0.0135
2025-05-14 2025-03-31 13F/A-1 PINNACLE WEST CAP COM 723484101 115,237 -1,605 -1.37 10,977 10.85 0.0141
2025-05-13 2025-03-31 13F PINNACLE WEST CAP COM 723484101 120,937 4,095 10,707 0.0116
2025-02-11 2024-12-31 13F PINNACLE WEST CAP COM 723484101 116,842 25,226 27.53 9,904 22.03 0.0127
2024-11-12 2024-09-30 13F PINNACLE WEST CAP COM 723484101 91,616 -73,362 -44.47 8,116 -35.60 0.0105
2024-08-13 2024-06-30 13F PINNACLE WEST CAP COM 723484101 164,978 -63,577 -27.82 12,601 -26.23 0.0179
2024-05-07 2024-03-31 13F PINNACLE WEST CAP COM 723484101 228,555 30,924 15.65 17,080 20.30 0.0250
2024-02-14 2023-12-31 13F PINNACLE WEST CAP COM 723484101 197,631 5,176 2.69 14,197 0.12 0.0228
2023-11-14 2023-09-30 13F PINNACLE WEST CAP COM 723484101 192,455 -73 -0.04 14,181 -9.58 0.0255
2023-08-11 2023-06-30 13F PINNACLE WEST CAP COM 723484101 192,528 23,187 13.69 15,683 16.87 0.0274
2023-05-12 2023-03-31 13F PINNACLE WEST CAP COM 723484101 169,341 22,628 15.42 13,418 20.29 0.0249
2023-02-10 2022-12-31 13F PINNACLE WEST CAP COM 723484101 146,713 -51,193 -25.87 11,156 -12.63 0.0248
2022-11-14 2022-09-30 13F PINNACLE WEST CAP COM 723484101 197,906 15,343 8.40 12,767 -4.40 0.0285
2022-08-15 2022-06-30 13F PINNACLE WEST CAP COM 723484101 182,563 47,012 34.68 13,354 26.33 0.0288
2022-05-13 2022-03-31 13F PINNACLE WEST CAP COM 723484101 135,551 9,777 7.77 10,571 19.41 0.0212
2022-02-14 2021-12-31 13F PINNACLE WEST CAP COM 723484101 125,774 -45,052 -26.37 8,853 -28.54 0.0166
2021-11-12 2021-09-30 13F PINNACLE WEST CAP COM 723484101 170,826 -12,809 -6.98 12,389 -17.63 0.0260
2021-08-06 2021-06-30 13F PINNACLE WEST CAP COM 723484101 183,635 31,444 20.66 15,041 21.48 0.0334
2021-05-12 2021-03-31 13F PINNACLE WEST CAP COM 723484101 152,191 16,009 11.76 12,381 13.69 0.0312
2021-02-08 2020-12-31 13F PINNACLE WEST CAP COM 723484101 136,182 -46,605 -25.50 10,890 -20.11 0.0282
2020-12-04 2020-09-30 13F/A-1 PINNACLE WEST CAP COM 723484101 182,787 22,888 14.31 13,632 17.56 0.0395
2020-11-06 2020-09-30 13F PINNACLE WEST CAP COM 723484101 184,850 24,951 13,786 33,193.6228
2020-08-17 2020-06-30 13F/A-1 PINNACLE WEST CAP COM 723484101 159,899 4,179 2.68 11,596 -2.28 0.0360
2020-08-11 2020-06-30 13F PINNACLE WEST CAP COM 723484101 103,715 -52,005 9,063 24,583.8699
2020-05-14 2020-03-31 13F PINNACLE WEST CAP COM 723484101 155,720 3,782 2.49 11,867 -13.39 0.0436
2020-02-06 2019-12-31 13F PINNACLE WEST CAP COM 723484101 151,938 -15,089 -9.03 13,701 -15.30 0.0409
2019-11-12 2019-09-30 13F PINNACLE WEST CAP COM 723484101 167,027 12,208 7.89 16,175 10.93 0.0414
2019-08-14 2019-06-30 13F PINNACLE WEST CAP COM 723484101 154,819 39,515 34.27 14,581 32.06 0.0476
2019-05-15 2019-03-31 13F PINNACLE WEST CAP COM 723484101 115,304 1,093 0.96 11,041 20.32 0.0371
2019-02-13 2018-12-31 13F PINNACLE WEST CAP COM 723484101 114,211 -10,403 -8.35 9,176 -6.93 0.0327
2018-11-08 2018-09-30 13F PINNACLE WEST CAP COM 723484101 124,614 8,041 6.90 9,859 4.98 0.0357
2018-08-03 2018-06-30 13F PINNACLE WEST CAP COM 723484101 116,573 -79,106 -40.43 9,391 -39.86 0.0319
2018-05-11 2018-03-31 13F PINNACLE WEST CAP COM 723484101 195,679 -1,097 -0.56 15,616 -6.84 0.0599
2018-02-08 2017-12-31 13F PINNACLE WEST CAP COM 723484101 196,776 3,964 2.06 16,762 2.82 0.0582
2017-11-06 2017-09-30 13F PINNACLE WEST CAP COM 723484101 192,812 -21,363 -9.97 16,303 -10.62 0.0579
2017-07-31 2017-06-30 13F PINNACLE WEST CAP COM 723484101 214,175 55,000 34.55 18,240 37.43 0.0727
2017-05-05 2017-03-31 13F PINNACLE WEST CAP COM 723484101 159,175 75,207 89.57 13,272 102.56 0.0582
2017-02-02 2016-12-31 13F PINNACLE WEST CAP COM 723484101 83,968 -3,324 -3.81 6,552 -1.24 0.0317
2016-11-04 2016-09-30 13F PINNACLE WEST CAP COM 723484101 87,292 -2,039 -2.28 6,634 -8.38 0.0337
2016-08-11 2016-06-30 13F PINNACLE WEST CAP COM 723484101 89,331 13,071 17.14 7,241 26.50 0.0434
2016-05-10 2016-03-31 13F/A-1 PINNACLE WEST CAP COM 723484101 76,260 -7,003 -8.41 5,724 6.61 0.0356
2016-02-03 2015-12-31 13F PINNACLE WEST CAP COM 723484101 83,263 74,639 865.48 5,369 870.89 0.0327
2015-11-02 2015-09-30 13F/A-1 PINNACLE WEST CAP COM 723484101 8,624 -39,634 -82.13 553 -79.86 0.0051
2015-10-30 2015-09-30 13F PINNACLE WEST CAP COM 723484101 8,624 555
2015-08-07 2015-06-30 13F/A-1 PINNACLE FINL PARTNERS PUT 723484101 0 -37,167 -100.00 0 -100.00
2015-08-07 2015-06-30 13F/A-1 PINNACLE WEST CAP COM 723484101 48,258 11,091 29.84 2,746 15.96 0.0248
2015-08-04 2015-06-30 13F PINNACLE WEST CAP COM 723484101 48,258 11,091 2,746 0.0248
2015-05-14 2015-03-31 13F/A-1 PINNACLE WEST CAP COM 723484101 37,167 15,083 68.30 2,368 56.61 0.0206
2015-05-01 2015-03-31 13F PINNACLE FINL PARTNERS PUT 723484101 37,167 37,167 2,368 0.0206
2015-02-10 2014-12-31 13F PINNACLE WEST CAP COM 723484101 22,084 22,084 1,512 0.0134
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2015-08-07 2015-06-30 13F/A PINNACLE FINL PARTNERS PUT 0 -100.00 0 -100.00 n/a n/a n/a
2015-05-01 2015-03-31 13F PINNACLE FINL PARTNERS PUT 37,167 2,368 n/a n/a n/a
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.