Pfizer Inc.
CL ˙ SNSE ˙ US7170811035
SecurityCL:PFE / Pfizer Inc.
InstitutionAdirondack Trust Co
Latest Disclosed Ownership25,833 shares
Latest Disclosed Value $ 725,111
Adirondack Trust Co reports 5.21% decrease in ownership of PFE / Pfizer Inc.

On April 3, 2026 - Adirondack Trust Co filed a 13F-HR form disclosing ownership of 25,833 shares of Pfizer Inc. (CL:PFE) valued at $725,111 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 8, 2026 disclosing 27,252 shares of Pfizer Inc.. This represents a change in shares of -5.21% 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)
2026-04-03 2026-03-31 13F PFIZER HEALTHCARE 717081103 25,833 -1,419 -5.21 725 6.93 0.1430
2026-01-08 2025-12-31 13F PFIZER HEALTHCARE 717081103 27,252 -1,726 -5.96 678 -8.13 0.2231
2025-10-20 2025-09-30 13F PFIZER HEALTHCARE 717081103 28,978 -4,165 -12.57 738 -8.09 0.2475
2025-07-11 2025-06-30 13F PFIZER HEALTHCARE 717081103 33,143 -4,573 -12.12 803 -15.92 0.2916
2025-04-03 2025-03-31 13F PFIZER HEALTHCARE 717081103 37,716 -4,089 -9.78 956 -13.81 0.3735
2025-01-17 2024-12-31 13F PFIZER HEALTHCARE 717081103 41,805 -12,187 -22.57 1,109 -29.02 0.4233
2024-10-08 2024-09-30 13F PFIZER HEALTHCARE 717081103 53,992 -1,275 -2.31 1,562 1.04 0.6016
2024-07-09 2024-06-30 13F PFIZER HEALTHCARE 717081103 55,267 -189 -0.34 1,546 0.46 0.6312
2024-04-09 2024-03-31 13F PFIZER HEALTHCARE 717081103 55,456 -165 -0.30 1,539 4.20 0.6441
2024-03-29 2023-12-31 13F PFIZER HEALTHCARE 717081103 55,621 -1,714 -2.99 1,477 -22.36 0.6381
2023-10-31 2023-09-30 13F PFIZER HEALTHCARE 717081103 57,335 1,067 1.90 1,901 -6.26 0.9488
2023-08-09 2023-06-30 13F PFIZER HEALTHCARE 717081103 56,268 -153 -0.27 2,029 -11.86 0.9482
2023-04-28 2023-03-31 13F PFIZER HEALTHCARE 717081103 56,421 119 0.21 2,301 -20.21 1.1656
2023-01-13 2022-12-31 13F PFIZER HEALTHCARE 717081103 56,302 -5,403 -8.76 2,885 6.81 1.4924
2022-10-13 2022-09-30 13F PFIZER HEALTHCARE 717081103 61,705 416 0.68 2,700 -15.97 1.5089
2022-07-06 2022-06-30 13F PFIZER HEALTHCARE 717081103 61,289 17,413 39.69 3,213 41.48 1.7226
2022-04-05 2022-03-31 13F PFIZER HEALTHCARE 717081103 43,876 3,119 7.65 2,271 -5.61 1.0747
2022-01-13 2021-12-31 13F PFIZER HEALTHCARE 717081103 40,757 620 1.54 2,406 37.02 1.1476
2021-11-16 2021-09-30 13F PFIZER HEALTHCARE 717081103 40,137 3,231 8.75 1,756 21.61 0.8352
2021-07-15 2021-06-30 13F PFIZER HEALTHCARE 717081103 36,906 447 1.23 1,444 9.39 0.7284
2021-04-16 2021-03-31 13F PFIZER HEALTHCARE 717081103 36,459 3,390 10.25 1,320 11.20 0.7028
2021-02-12 2020-12-31 13F PFIZER HEALTHCARE 717081103 33,069 2,390 7.79 1,187 5.51 0.7136
2020-10-05 2020-09-30 13F PFIZER HEALTHCARE 717081103 30,679 -90 -0.29 1,125 -4.90 0.7378
2020-08-19 2020-06-30 13F PFIZER HEALTHCARE 717081103 30,769 5,001 19.41 1,183 40.67 0.7827
2020-04-23 2020-03-31 13F PFIZER HEALTHCARE 717081103 25,768 964 3.89 841 -8.88 0.6865
2020-02-11 2019-12-31 13F PFIZER HEALTHCARE 717081103 24,804 825 3.44 923 7.20 0.6055
2019-10-09 2019-09-30 13F PFIZER HEALTHCARE 717081103 23,979 100 0.42 861 -16.73 0.6046
2019-07-15 2019-06-30 13F PFIZER HEALTHCARE 717081103 23,879 3,882 19.41 1,034 27.34 0.7215
2019-05-13 2019-03-31 13F PFIZER HEALTHCARE 717081103 19,997 398 2.03 812 -5.14 0.5572
2019-01-18 2018-12-31 13F PFIZER HEALTHCARE 717081103 19,599 119 0.61 856 -0.23 0.6629
2018-10-22 2018-09-30 13F PFIZER HEALTHCARE 717081103 19,480 0 0.00 858 21.53 0.5786
2018-07-26 2018-06-30 13F PFIZER HEALTHCARE 717081103 19,480 60 0.31 706 -0.70 0.4980
2018-05-03 2018-03-31 13F PFIZER HEALTHCARE 717081103 19,420 -1,411 -6.77 711 -5.83 0.5062
2018-01-10 2017-12-31 13F PFIZER HEALTHCARE 717081103 20,831 -975 -4.47 755 -3.08 0.5481
2017-10-12 2017-09-30 13F PFIZER HEALTHCARE 717081103 21,806 380 1.77 779 8.34 0.6116
2017-08-02 2017-06-30 13F PFIZER HEALTHCARE 717081103 21,426 -1,178 -5.21 719 -6.99 0.5789
2017-04-12 2017-03-31 13F PFIZER HEALTHCARE 717081103 22,604 5 0.02 773 5.46 0.5399
2017-01-17 2016-12-31 13F PFIZER HEALTHCARE 717081103 22,599 224 1.00 733 -3.17 0.5108
2016-10-21 2016-09-30 13F PFIZER HEALTHCARE 717081103 22,375 1,540 7.39 757 3.27 0.5447
2016-07-13 2016-06-30 13F PFIZER HEALTHCARE 717081103 20,835 -514 -2.41 733 15.80 0.5217
2016-04-12 2016-03-31 13F PFIZER HEALTHCARE 717081103 21,349 855 4.17 633 1.28 0.4696
2016-02-08 2015-12-31 13F PFIZER HEALTHCARE 717081103 20,494 562 2.82 625 -0.16 0.4945
2015-10-19 2015-09-30 13F PFIZER HEALTHCARE 717081103 19,932 -170 -0.85 626 -7.12 0.5045
2015-07-30 2015-06-30 13F PFIZER HEALTHCARE 717081103 20,102 -712 -3.42 674 -6.91 0.5023
2015-04-07 2015-03-31 13F PFIZER HEALTHCARE 717081103 20,814 20,814 0.00 724 0.5412
2015-01-27 2014-12-31 13F PFIZER HEALTHCARE 717081103 0 -21,129 -100.00 0 -100.00
2014-10-28 2014-09-30 13F PFIZER HEALTHCARE 717081103 21,129 2,383 12.71 625 12.41 0.4740
2014-07-23 2014-06-30 13F PFIZER HEALTHCARE 717081103 18,746 735 4.08 556 -3.81 0.4250
2014-04-17 2014-03-31 13F PFIZER HEALTHCARE 717081103 18,011 -374 -2.03 578 2.66 0.4609
2014-01-07 2013-12-31 13F PFIZER HEALTHCARE 717081103 18,385 244 1.35 563 8.06 0.4562
2013-10-04 2013-09-30 13F PFIZER HEALTHCARE 717081103 18,141 -390 -2.10 521 0.39 0.4586
2013-08-14 2013-06-30 13F PFIZER HEALTHCARE 717081103 18,531 18,531 519 0.4720
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.