Pfizer Inc.
CL ˙ SNSE ˙ US7170811035
SecurityCL:PFE / Pfizer Inc.
InstitutionBaxter Bros Inc
Latest Disclosed Ownership54,137 shares
Latest Disclosed Value $ 1,520,167
Baxter Bros Inc reports 0.55% decrease in ownership of PFE / Pfizer Inc.

On April 28, 2026 - Baxter Bros Inc filed a 13F-HR form disclosing ownership of 54,137 shares of Pfizer Inc. (CL:PFE) valued at $1,520,167 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 54,437 shares of Pfizer Inc.. This represents a change in shares of -0.55% 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)
2026-04-28 2026-03-31 13F PFIZER COM 717081103 54,137 -300 -0.55 1,520 12.18 0.1876
2026-01-26 2025-12-31 13F PFIZER COM 717081103 54,437 0 0.00 1,355 -2.31 0.1569
2025-10-14 2025-09-30 13F PFIZER COM 717081103 54,437 -1,151 -2.07 1,387 2.97 0.1603
2025-07-24 2025-06-30 13F PFIZER COM 717081103 55,588 -3,957 -6.65 1,347 -10.68 0.1648
2025-04-09 2025-03-31 13F PFIZER COM 717081103 59,545 -2,965 -4.74 1,509 -9.05 0.1987
2025-02-12 2024-12-31 13F PFIZER COM 717081103 62,510 -1,409 -2.20 1,658 -10.33 0.2169
2024-10-29 2024-09-30 13F PFIZER COM 717081103 63,919 -756 -1.17 1,850 2.21 0.2405
2024-07-15 2024-06-30 13F PFIZER COM 717081103 64,675 -1,081 -1.64 1,810 -0.82 0.2369
2024-04-29 2024-03-31 13F PFIZER COM 717081103 65,756 -372 -0.56 1,825 -4.15 0.2340
2024-05-17 2023-12-31 13F/A-1 PFIZER COM 717081103 66,128 -12,215 -15.59 1,904 -26.75 0.2637
2024-02-06 2023-12-31 13F Pfizer COM 717081103 66,128 -12,215 1,904 0.2691
2024-05-17 2023-09-30 13F/A-1 PFIZER COM 717081103 78,343 -3,625 -4.42 2,599 -13.57 0.3945
2023-10-23 2023-09-30 13F Pfizer COM 717081103 78,343 -3,625 2,599 0.3995
2023-08-14 2023-06-30 13F Pfizer COM 717081103 81,968 1,278 1.58 3,007 -8.69 0.4472
2023-05-15 2023-03-31 13F Pfizer COM 717081103 80,690 3,185 4.11 3,292 -17.10 0.5176
2023-02-01 2022-12-31 13F Pfizer COM 717081103 77,505 -439 -0.56 3,971 16.42 0.6529
2022-11-14 2022-09-30 13F Pfizer COM 717081103 77,944 47,584 156.73 3,411 114.26 0.6045
2022-07-25 2022-06-30 13F Pfizer COM 717081103 30,360 309 1.03 1,592 2.31 0.2857
2022-04-20 2022-03-31 13F Pfizer COM 717081103 30,051 -1,064 -3.42 1,556 -15.30 0.2337
2022-01-14 2021-12-31 13F Pfizer COM 717081103 31,115 -104 -0.33 1,837 36.78 0.2662
2021-10-25 2021-09-30 13F Pfizer COM 717081103 31,219 711 2.33 1,343 12.38 0.2150
2021-08-11 2021-06-30 13F Pfizer COM 717081103 30,508 5,173 20.42 1,195 30.17 0.1893
2021-04-23 2021-03-31 13F Pfizer COM 717081103 25,335 2,788 12.37 918 10.60 0.1577
2021-01-25 2020-12-31 13F Pfizer COM 717081103 22,547 2,981 15.24 830 15.60 0.1572
2020-11-05 2020-09-30 13F Pfizer COM 717081103 19,566 2,112 12.10 718 25.74 0.1553
2020-07-31 2020-06-30 13F Pfizer COM 717081103 17,454 84 0.48 571 0.71 0.1340
2020-04-17 2020-03-31 13F Pfizer COM 717081103 17,370 42 0.24 567 -16.49 0.1469
2020-01-10 2019-12-31 13F/A-20 Pfizer COM 717081103 17,328 9 0.05 679 9.16 0.1413
2020-01-09 2019-12-31 13F Pfizer COM 717081103 20,188 2,869 629 223,582.4376
2019-10-21 2019-09-30 13F Pfizer COM 717081103 17,319 109 0.63 622 -16.62 0.1408
2019-07-29 2019-06-30 13F Pfizer COM 717081103 17,210 -496 -2.80 746 -0.80 0.1704
2019-04-22 2019-03-31 13F Pfizer COM 717081103 17,706 -32 -0.18 752 -2.84 0.1757
2019-01-22 2018-12-31 13F Pfizer COM 717081103 17,738 2,336 15.17 774 13.99 0.2100
2018-10-11 2018-09-30 13F Pfizer COM 717081103 15,402 -1,556 -9.18 679 10.41 0.1630
2018-07-17 2018-06-30 13F Pfizer COM 717081103 16,958 -4,946 -22.58 615 -20.85 0.1653
2018-05-16 2018-03-31 13F Pfizer COM 717081103 21,904 8,356 61.68 777 58.25 0.2119
2018-02-01 2017-12-31 13F Pfizer COM 717081103 13,548 -11,205 -45.27 491 -44.46 0.1345
2017-10-16 2017-09-30 13F Pfizer COM 717081103 24,753 6 0.02 884 6.38 0.2540
2017-08-01 2017-06-30 13F Pfizer COM 717081103 24,747 6 0.02 831 -1.77 0.2502
2017-04-24 2017-03-31 13F Pfizer COM 717081103 24,741 3,558 16.80 846 22.97 0.2646
2017-01-19 2016-12-31 13F Pfizer COM 717081103 21,183 446 2.15 688 -1.99 0.2215
2016-10-20 2016-09-30 13F Pfizer COM 717081103 20,737 6 0.03 702 -3.84 0.2373
2016-07-07 2016-06-30 13F Pfizer COM 717081103 20,731 -1,427 -6.44 730 2.10 0.2553
2016-02-08 2015-12-31 13F Pfizer COM 717081103 22,158 45 0.20 715 -3.51 0.2649
2015-10-05 2015-09-30 13F Pfizer COM 717081103 22,113 0 0.00 741 0.00 0.2721
2015-07-07 2015-06-30 13F Pfizer COM 717081103 22,113 1,238 5.93 741 2.07 0.2718
2015-04-16 2015-03-31 13F Pfizer COM 717081103 20,875 687 3.40 726 15.42 0.2641
2015-01-22 2014-12-31 13F Pfizer COM 717081103 20,188 349 1.76 629 7.16 0.2276
2014-11-04 2014-09-30 13F Pfizer COM 717081103 19,839 2,416 13.87 587 13.54 0.2284
2014-07-11 2014-06-30 13F Pfizer COM 717081103 17,423 3 0.02 517 -7.68 0.2129
2014-04-08 2014-03-31 13F Pfizer COM 717081103 17,420 2 0.01 560 4.87 0.2542
2014-02-10 2013-12-31 13F Pfizer COM 717081103 17,418 -664 -3.67 534 2.89 0.2501
2013-10-28 2013-09-30 13F Pfizer COM 717081103 18,082 18,082 519 0.2837
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.