Pinnacle West Capital Corporation
DE ˙ DB ˙ US7234841010
85,88 € ↑0,88 (1,04%)
2026-06-05
DEL PRIS
SecurityDE:PWC / Pinnacle West Capital Corporation
InstitutionZimmer Partners, LP
Latest Disclosed Ownership500,055 shares
Latest Disclosed Value $ 50,380,541
Zimmer Partners, LP reports 266.46% increase in ownership of PWC / Pinnacle West Capital Corporation

On May 15, 2026 - Zimmer Partners, LP filed a 13F-HR form disclosing ownership of 500,055 shares of Pinnacle West Capital Corporation (DE:PWC) valued at $44,004,840 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 136,455 shares of Pinnacle West Capital Corporation. This represents a change in shares of 266.46% during the quarter. The current value of the position is $42,944,723 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)
2026-05-15 2026-03-31 13F PINNACLE WEST CAP COM 723484101 500,055 363,600 266.46 50,381 316.26 1.2120
2026-02-17 2025-12-31 13F PINNACLE WEST CAP COM 723484101 136,455 -12,177 -8.19 12,104 -9.18 0.3189
2025-11-14 2025-09-30 13F PINNACLE WEST CAP COM 723484101 148,632 -351,368 -70.27 13,326 -70.21 0.2878
2025-08-14 2025-06-30 13F PINNACLE WEST CAP COM 723484101 500,000 450,000 900.00 44,735 839.42 0.9731
2025-05-15 2025-03-31 13F PINNACLE WEST CAP COM 723484101 50,000 50,000 4,762 0.0898
2025-02-14 2024-12-31 13F PINNACLE WEST CAP COM 723484101 0 -2,899,676 -100.00 0 -100.00
2024-11-14 2024-09-30 13F PINNACLE WEST CAP COM 723484101 2,899,676 155,466 5.67 256,882 22.56 4.6855
2024-08-14 2024-06-30 13F PINNACLE WEST CAP COM 723484101 2,744,210 89,200 3.36 209,603 5.64 3.8646
2024-05-15 2024-03-31 13F PINNACLE WEST CAP COM 723484101 2,655,010 2,655,010 198,409 4.2399
2023-11-14 2023-09-30 13F PINNACLE WEST CAP COM 723484101 0 -91,000 -100.00 0 -100.00
2023-08-14 2023-06-30 13F PINNACLE WEST CAP COM 723484101 91,000 91,000 7,413 0.1746
2023-05-15 2023-03-31 13F PINNACLE WEST CAP COM 723484101 0 -719,383 -100.00 0 -100.00
2023-02-14 2022-12-31 13F PINNACLE WEST CAP COM 723484101 719,383 -508,117 -41.39 54,702 -30.92 1.1002
2022-11-14 2022-09-30 13F PINNACLE WEST CAP COM 723484101 1,227,500 1,027,500 513.75 79,186 441.48 1.7184
2022-08-15 2022-06-30 13F PINNACLE WEST CAP COM 723484101 200,000 200,000 14,624 0.3045
2021-05-17 2021-03-31 13F PINNACLE WEST CAP COM 723484101 0 -833,004 -100.00 0 -100.00
2021-02-16 2020-12-31 13F PINNACLE WEST CAP COM 723484101 833,004 -86,996 -9.46 66,599 -2.90 0.9776
2020-11-16 2020-09-30 13F PINNACLE WEST CAP COM 723484101 920,000 -2,163,470 -70.16 68,586 -69.65 1.0610
2020-08-14 2020-06-30 13F PINNACLE WEST CAP COM 723484101 3,083,470 670,907 27.81 225,988 23.59 3.0637
2020-05-15 2020-03-31 13F PINNACLE WEST CAP COM 723484101 2,412,563 1,537,563 175.72 182,848 132.37 4.0506
2020-02-14 2019-12-31 13F PINNACLE WEST CAP COM 723484101 875,000 833,200 1,993.30 78,689 1,839.11 1.0886
2019-11-14 2019-09-30 13F PINNACLE WEST CAP COM 723484101 41,800 41,800 4,058 0.0441
2019-05-15 2019-03-31 13F PINNACLE WEST CAP COM 723484101 0 -65,700 -100.00 0 -100.00
2019-02-14 2018-12-31 13F PINNACLE WEST CAP COM 723484101 65,700 -58,700 -47.19 5,598 -43.17 0.0772
2018-11-14 2018-09-30 13F PINNACLE WEST CAP COM 723484101 124,400 -550,000 -81.55 9,850 -81.87 0.1304
2018-08-14 2018-06-30 13F PINNACLE WEST CAP COM 723484101 674,400 300,000 80.13 54,330 81.85 0.7449
2018-05-15 2018-03-31 13F PINNACLE WEST CAP COM 723484101 374,400 61,900 19.81 29,877 12.24 0.5396
2018-02-14 2017-12-31 13F PINNACLE WEST CAP COM 723484101 312,500 312,500 26,619 0.6484
2017-02-14 2016-12-31 13F PINNACLE WEST CAP COM 723484101 0 -75,000 -100.00 0 -100.00
2016-11-14 2016-09-30 13F PINNACLE WEST CAP COM 723484101 75,000 75,000 0.00 5,699 0.1529
2016-02-16 2015-12-31 13F PINNACLE WEST CAP COM 723484101 0 -346,600 -100.00 0 -100.00
2015-11-16 2015-09-30 13F PINNACLE WEST CAP COM 723484101 346,600 271,800 363.37 22,231 422.47 1.6901
2015-08-14 2015-06-30 13F PINNACLE WEST CAP COM 723484101 74,800 74,800 -80.05 4,255 -79.54 0.2314
2013-11-14 2013-09-30 13F PINNACLE WEST CAP COM 723484101 0 -375,000 -100.00 0 -100.00
2013-08-14 2013-06-30 13F PINNACLE WEST CAP COM 723484101 375,000 375,000 20,801 3.9539
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.