Pfizer Inc.
CL ˙ SNSE ˙ US7170811035
SecurityCL:PFE / Pfizer Inc.
InstitutionProfessional Advisory Services Inc
Latest Disclosed Ownership23,392 shares
Latest Disclosed Value $ 657
Professional Advisory Services Inc ownership in PFE / Pfizer Inc.

On April 15, 2026 - Professional Advisory Services Inc filed a 13F-HR form disclosing ownership of 23,392 shares of Pfizer Inc. (CL:PFE) valued at $657 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 12, 2026 disclosing 23,392 shares of Pfizer Inc..

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)
2026-04-15 2026-03-31 13F PFIZER COM 717081103 23,392 0 0.00 1 0.0907
2026-01-12 2025-12-31 13F PFIZER COM 717081103 23,392 -800 -3.31 1 0.0754
2025-10-29 2025-09-30 13F PFIZER COM 717081103 24,192 -200 -0.82 1 0.0802
2025-07-11 2025-06-30 13F PFIZER COM 717081103 24,392 -206 -0.84 1 0.0802
2025-04-14 2025-03-31 13F PFIZER COM 717081103 24,598 -462 -1.84 1 0.0873
2025-01-15 2024-12-31 13F PFIZER COM 717081103 25,060 -300 -1.18 1 0.0918
2024-10-17 2024-09-30 13F PFIZER COM 717081103 25,360 -6 -0.02 1 0.0964
2024-07-10 2024-06-30 13F PFIZER COM 717081103 25,366 0 0.00 1 0.0970
2024-04-22 2024-03-31 13F PFIZER COM 717081103 25,366 206 0.82 1 0.0955
2024-01-10 2023-12-31 13F PFIZER COM 717081103 25,160 150 0.60 1 0.1035
2023-10-10 2023-09-30 13F PFIZER COM 717081103 25,010 -2,450 -8.92 1 -100.00 0.1365
2023-07-10 2023-06-30 13F PFIZER COM 717081103 27,460 -10 -0.04 1 0.00 0.1529
2023-04-11 2023-03-31 13F PFIZER COM 717081103 27,470 0 0.00 1 0.00 0.1747
2023-01-13 2022-12-31 13F PFIZER COM 717081103 27,470 -375 -1.35 1 -99.92 0.2291
2022-10-11 2022-09-30 13F PFIZER COM 717081103 27,845 -250 -0.89 1,218 -17.31 0.2116
2022-07-13 2022-06-30 13F PFIZER COM 717081103 28,095 100 0.36 1,473 1.66 0.2455
2022-04-18 2022-03-31 13F PFIZER COM 717081103 27,995 0 0.00 1,449 -12.34 0.2080
2022-01-19 2021-12-31 13F PFIZER COM 717081103 27,995 820 3.02 1,653 41.40 0.2248
2021-10-05 2021-09-30 13F PFIZER COM 717081103 27,175 245 0.91 1,169 10.81 0.1717
2021-08-20 2021-06-30 13F PFIZER COM 717081103 26,930 1,485 5.84 1,055 14.43 0.1532
2021-04-26 2021-03-31 13F PFIZER COM 717081103 25,445 100 0.39 922 -1.18 0.1412
2021-01-21 2020-12-31 13F PFIZER COM 717081103 25,345 -346 -1.35 933 -1.06 0.1500
2020-10-19 2020-09-30 13F PFIZER COM 717081103 25,691 746 2.99 943 15.56 0.1683
2020-07-24 2020-06-30 13F PFIZER COM 717081103 24,945 100 0.40 816 0.62 0.1570
2020-04-23 2020-03-31 13F PFIZER COM 717081103 24,845 -25 -0.10 811 -16.74 0.1882
2020-01-23 2019-12-31 13F PFIZER COM 717081103 24,870 0 0.00 974 8.95 0.1735
2019-10-28 2019-09-30 13F PFIZER COM 717081103 24,870 0 0.00 894 -16.99 0.1699
2019-07-30 2019-06-30 13F PFIZER COM 717081103 24,870 -25 -0.10 1,077 1.89 0.2088
2019-04-29 2019-03-31 13F PFIZER COM 717081103 24,895 -15 -0.06 1,057 -2.76 0.2123
2019-01-17 2018-12-31 13F PFIZER COM 717081103 24,910 0 0.00 1,087 -1.00 0.2421
2018-10-25 2018-09-30 13F PFIZER COM 717081103 24,910 -1,190 -4.56 1,098 15.95 0.2165
2018-07-25 2018-06-30 13F PFIZER COM 717081103 26,100 -695 -2.59 947 -0.42 0.1954
2018-04-24 2018-03-31 13F PFIZER COM 717081103 26,795 0 0.00 951 -2.06 0.2058
2018-01-19 2017-12-31 13F PFIZER COM 717081103 26,795 0 0.00 971 1.46 0.2048
2017-10-12 2017-09-30 13F PFIZER COM 717081103 26,795 0 0.00 957 6.33 0.2039
2017-07-13 2017-06-30 13F PFIZER COM 717081103 26,795 0 0.00 900 -1.85 0.1952
2017-04-19 2017-03-31 13F PFIZER COM 717081103 26,795 0 0.00 917 5.40 0.2030
2017-01-19 2016-12-31 13F PFIZER COM 717081103 26,795 -3,050 -10.22 870 -13.95 0.2023
2016-10-20 2016-09-30 13F PFIZER COM 717081103 29,845 1,268 4.44 1,011 0.50 0.2304
2016-07-15 2016-06-30 13F PFIZER COM 717081103 28,577 0 0.00 1,006 18.77 0.2302
2016-04-15 2016-03-31 13F PFIZER COM 717081103 28,577 0 0.00 847 -8.13 0.2003
2016-01-19 2015-12-31 13F PFIZER COM 717081103 28,577 -1,250 -4.19 922 -1.60 0.2200
2015-10-26 2015-09-30 13F PFIZER COM 717081103 29,827 0 0.00 937 -6.30 0.2351
2015-07-15 2015-06-30 13F PFIZER COM 717081103 29,827 0 0.00 1,000 -3.66 0.2396
2015-04-20 2015-03-31 13F PFIZER COM 717081103 29,827 0 0.00 1,038 11.73 0.2493
2015-01-22 2014-12-31 13F PFIZER COM 717081103 29,827 15 0.05 929 5.33 0.2165
2014-10-21 2014-09-30 13F PFIZER COM 717081103 29,812 0 0.00 882 -0.34 0.2133
2014-07-23 2014-06-30 13F PFIZER COM 717081103 29,812 0 0.00 885 -7.62 0.2148
2014-04-08 2014-03-31 13F PFIZER COM 717081103 29,812 0 0.00 958 4.93 0.2390
2014-02-10 2013-12-31 13F PFIZER COM 717081103 29,812 0 0.00 913 6.66 0.2373
2013-10-18 2013-09-30 13F PFIZER COM 717081103 29,812 0 0.00 856 2.51 0.2414
2013-07-29 2013-06-30 13F PFIZER COM 717081103 29,812 29,812 835 0.2494
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.