Palo Alto Networks, Inc.
CH ˙ SWX ˙ US6974351057
SecurityCH:PANW / Palo Alto Networks, Inc.
InstitutionBlair William & Co/il
Latest Disclosed Ownership1,304,858 shares
Latest Disclosed Value $ 209,194,794
Blair William & Co/il reports 4.36% increase in ownership of PANW / Palo Alto Networks, Inc.

On May 8, 2026 - Blair William & Co/il filed a 13F-HR form disclosing ownership of 1,304,858 shares of Palo Alto Networks, Inc. (CH:PANW) valued at $209,194,794 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,250,372 shares of Palo Alto Networks, Inc.. This represents a change in shares of 4.36% during the quarter.

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 PALO ALTO NETWORKS COM 697435105 1,304,858 54,486 4.36 209,195 -9.17 0.5995
2026-02-17 2025-12-31 13F PALO ALTO NETWORKS COM 697435105 1,250,372 12,508 1.01 230,319 -8.62 0.6181
2025-11-12 2025-09-30 13F PALO ALTO NETWORKS COM 697435105 1,237,864 79,978 6.91 252,054 6.37 0.6709
2025-07-24 2025-06-30 13F PALO ALTO NETWORKS COM 697435105 1,157,886 -20,762 -1.76 236,950 17.81 0.6581
2025-05-09 2025-03-31 13F PALO ALTO NETWORKS COM 697435105 1,178,648 -125,379 -9.61 201,124 -15.24 0.6066
2025-02-12 2024-12-31 13F PALO ALTO NETWORKS COM 697435105 1,304,027 657,597 101.73 237,281 7.39 0.6902
2024-11-12 2024-09-30 13F PALO ALTO NETWORKS COM 697435105 646,430 19,629 3.13 220,950 3.98 0.6489
2024-08-12 2024-06-30 13F PALO ALTO NETWORKS COM 697435105 626,801 3,341 0.54 212,492 19.95 0.6554
2024-05-09 2024-03-31 13F PALO ALTO NETWORKS COM 697435105 623,460 739 0.12 177,144 -3.53 0.5564
2024-02-12 2023-12-31 13F PALO ALTO NETWORKS COM 697435105 622,721 -1,938 -0.31 183,628 25.39 0.6257
2023-11-09 2023-09-30 13F PALO ALTO NETWORKS COM 697435105 624,659 75,911 13.83 146,445 4.45 0.5616
2023-08-11 2023-06-30 13F PALO ALTO NETWORKS COM 697435105 548,748 -33,044 -5.68 140,210 20.66 0.5136
2023-05-12 2023-03-31 13F PALO ALTO NETWORKS COM 697435105 581,792 4,187 0.72 116,207 44.18 0.4642
2023-02-10 2022-12-31 13F PALO ALTO NETWORKS COM 697435105 577,605 144,432 33.34 80,599 13.60 0.3505
2022-11-09 2022-09-30 13F PALO ALTO NETWORKS COM 697435105 433,173 291,873 206.56 70,949 1.66 0.3259
2022-08-10 2022-06-30 13F PALO ALTO NETWORKS COM 697435105 141,300 -5,169 -3.53 69,793 -23.45 0.3096
2022-05-13 2022-03-31 13F PALO ALTO NETWORKS COM 697435105 146,469 35,874 32.44 91,178 48.08 0.3196
2022-02-14 2021-12-31 13F PALO ALTO NETWORKS COM 697435105 110,595 6,806 6.56 61,575 23.86 0.1931
2021-11-12 2021-09-30 13F PALO ALTO NETWORKS COM 697435105 103,789 1,258 1.23 49,715 30.68 0.1692
2021-08-12 2021-06-30 13F PALO ALTO NETWORKS COM 697435105 102,531 2,042 2.03 38,044 17.55 0.1318
2021-05-13 2021-03-31 13F PALO ALTO NETWORKS COM 697435105 100,489 8,932 9.76 32,363 -0.54 0.1221
2021-02-09 2020-12-31 13F PALO ALTO NETWORKS COM 697435105 91,557 2,325 2.61 32,538 48.98 0.1193
2020-11-06 2020-09-30 13F PALO ALTO NETWORKS COM 697435105 89,232 8,288 10.24 21,840 17.48 0.0926
2020-08-12 2020-06-30 13F PALO ALTO NETWORKS COM 697435105 80,944 -4,495 -5.26 18,590 32.70 0.0886
2020-05-11 2020-03-31 13F PALO ALTO NETWORKS COM 697435105 85,439 -49,073 -36.48 14,009 -54.96 0.0876
2020-02-13 2019-12-31 13F PALO ALTO NETWORKS COM 697435105 134,512 4,111 3.15 31,106 17.03 0.1599
2019-11-12 2019-09-30 13F PALO ALTO NETWORKS COM 697435105 130,401 4,192 3.32 26,580 3.36 0.1532
2019-08-13 2019-06-30 13F PALO ALTO NETWORKS COM 697435105 126,209 35,391 38.97 25,716 16.58 0.1470
2019-05-14 2019-03-31 13F PALO ALTO NETWORKS COM 697435105 90,818 17,357 23.63 22,058 59.42 0.1345
2019-02-14 2018-12-31 13F PALO ALTO NETWORKS COM 697435105 73,461 -1,670 -2.22 13,836 -18.25 0.1010
2018-11-13 2018-09-30 13F PALO ALTO NETWORKS COM 697435105 75,131 -2,223 -2.87 16,924 6.48 0.1037
2018-08-13 2018-06-30 13F PALO ALTO NETWORKS COM 697435105 77,354 1,290 1.70 15,894 15.12 0.1081
2018-05-15 2018-03-31 13F PALO ALTO NETWORKS COM 697435105 76,064 6,580 9.47 13,807 37.10 0.0976
2018-02-14 2017-12-31 13F PALO ALTO NETWORKS COM 697435105 69,484 2,303 3.43 10,071 4.03 0.0684
2017-11-13 2017-09-30 13F PALO ALTO NETWORKS COM 697435105 67,181 -11,553 -14.67 9,681 -8.11 0.0726
2017-08-04 2017-06-30 13F PALO ALTO NETWORKS COM 697435105 78,734 -142,994 -64.49 10,535 -68.55 0.0791
2017-05-10 2017-03-31 13F PALO ALTO NETWORKS COM 697435105 221,728 5,506 2.55 33,498 23.89 0.2700
2017-02-14 2016-12-31 13F PALO ALTO NETWORKS INC COM COM 697435105 216,222 -165,866 -43.41 27,039 -55.58 0.2419
2016-11-14 2016-09-30 13F PALO ALTO NETWORKS COM 697435105 382,088 -3,323 -0.86 60,878 28.80 0.5381
2016-08-08 2016-06-30 13F PALO ALTO NETWORKS COM 697435105 385,411 -2,474 -0.64 47,267 -25.30 0.4407
2016-05-16 2016-03-31 13F PALO ALTO NETWORKS COM 697435105 387,885 55,619 16.74 63,280 8.12 0.5957
2016-02-16 2015-12-31 13F PALO ALTO NETWORKS COM 697435105 332,266 7,923 2.44 58,525 4.91 0.5495
2015-11-12 2015-09-30 13F PALO ALTO NETWORKS COM 697435105 324,343 93,789 40.68 55,787 38.51 0.4826
2015-08-03 2015-06-30 13F PALO ALTO NETWORKS COM 697435105 230,554 13,983 6.46 40,277 27.31 0.0602
2015-05-11 2015-03-31 13F PALO ALTO NETWORKS COM 697435105 216,571 216,571 0.00 31,636 0.0487
2015-02-05 2014-12-31 13F PALO ALTO NETWORKS COM 697435105 0 -143,734 -100.00 0 -100.00
2014-11-04 2014-09-30 13F PALO ALTO NETWORKS COM 697435105 143,734 32,240 28.92 14,100 50.83 0.0241
2014-08-01 2014-06-30 13F PALO ALTO NETWORKS INC COM COM 697435105 111,494 41,803 59.98 9,348 95.56 0.0153
2014-05-06 2014-03-31 13F PALO ALTO NETWORKS INC COM COM 697435105 69,691 25,651 58.24 4,780 88.93 0.0079
2014-02-11 2013-12-31 13F PALO ALTO NETWORKS INC COM COM 697435105 44,040 19,120 76.73 2,530 121.74 0.0042
2013-11-12 2013-09-30 13F PALO ALTO NETWORKS INC COM COM 697435105 24,920 18,120 266.47 1,141 298.95 0.0020
2013-08-07 2013-06-30 13F PALO ALTO NETWORKS INC COM COM 697435105 6,800 6,800 286 0.0006
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.