Pfizer Inc.
CL ˙ SNSE ˙ US7170811035
SecurityCL:PFE / Pfizer Inc.
InstitutionTower Bridge Advisors
Latest Disclosed Ownership41,109 shares
Latest Disclosed Value $ 1,154,341
Tower Bridge Advisors reports 17.95% decrease in ownership of PFE / Pfizer Inc.

On May 12, 2026 - Tower Bridge Advisors filed a 13F-HR form disclosing ownership of 41,109 shares of Pfizer Inc. (CL:PFE) valued at $1,154,341 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 50,100 shares of Pfizer Inc.. This represents a change in shares of -17.95% 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)
2026-05-12 2026-03-31 13F Pfizer Common 717081103 41,109 -8,991 -17.95 1,154 -7.46 0.0809
2026-02-13 2025-12-31 13F PFIZER COMMON 717081103 50,100 -6,000 -10.70 1,247 -12.74 0.1260
2025-11-12 2025-09-30 13F PFIZER COMMON 717081103 56,100 -813 -1.43 1,429 3.63 0.1428
2025-08-11 2025-06-30 13F PFIZER COMMON 717081103 56,913 -7,075 -11.06 1,380 -14.93 0.1483
2025-05-08 2025-03-31 13F PFIZER COMMON 717081103 63,988 -1,009 -1.55 1,621 -5.97 0.1812
2025-02-05 2024-12-31 13F PFIZER COMMON 717081103 64,997 1,296 2.03 1,724 -6.46 0.1836
2024-11-06 2024-09-30 13F PFIZER COMMON 717081103 63,701 -1,889 -2.88 1,844 0.44 0.1913
2024-07-24 2024-06-30 13F PFIZER COMMON 717081103 65,590 1,563 2.44 1,835 3.32 0.2040
2024-04-29 2024-03-31 13F PFIZER COMMON 717081103 64,027 -2,400 -3.61 1,777 -7.11 0.1808
2024-02-14 2023-12-31 13F PFIZER COMMON 717081103 66,427 -2,950 -4.25 1,912 -16.91 0.1645
2023-11-01 2023-09-30 13F PFIZER COMMON 717081103 69,377 3,799 5.79 2,301 -4.32 0.2130
2023-07-20 2023-06-30 13F PFIZER COM 717081103 65,578 -113,601 -63.40 2,405 -67.10 0.2205
2023-04-26 2023-03-31 13F PFIZER COMMON 717081103 179,179 -390 -0.22 7,311 -20.55 0.5986
2023-01-27 2022-12-31 13F PFIZER COMMON 717081103 179,569 0 0.00 9,201 17.11 0.7642
2022-11-14 2022-09-30 13F PFIZER COMMON 717081103 179,569 -2,499 -1.37 7,858 -17.68 0.6982
2022-07-21 2022-06-30 13F PFIZER COMMON 717081103 182,068 -5,476 -2.92 9,546 -1.69 0.7785
2022-05-05 2022-03-31 13F PFIZER COMMON 717081103 187,544 -2,228 -1.17 9,709 -13.36 0.6490
2022-02-09 2021-12-31 13F PFIZER COMMON 717081103 189,772 -800 -0.42 11,206 36.73 0.6881
2021-10-28 2021-09-30 13F PFIZER COMMON 717081103 190,572 -530 -0.28 8,197 9.53 0.5468
2021-08-10 2021-06-30 13F PFIZER COMMON 717081103 191,102 5,279 2.84 7,484 11.16 0.4988
2021-05-12 2021-03-31 13F PFIZER COMMON 717081103 185,823 -10,193 -5.20 6,732 -6.69 0.5068
2021-02-11 2020-12-31 13F PFIZER COMMON 717081103 196,016 27,237 16.14 7,215 16.48 0.5877
2020-11-13 2020-09-30 13F PFIZER COMMON 717081103 168,779 -1,105 -0.65 6,194 11.50 0.6328
2020-07-22 2020-06-30 13F PFIZER COMMON 717081103 169,884 0 0.00 5,555 0.18 0.6229
2020-04-27 2020-03-31 13F PFIZER COMMON 717081103 169,884 -1,468 -0.86 5,545 -17.40 0.7279
2020-02-05 2019-12-31 13F PFIZER COMMON 717081103 171,352 -21,497 -11.15 6,714 -6.05 0.7092
2019-11-12 2019-09-30 13F PFIZER COMMON 717081103 192,849 -1,425 -0.73 7,145 -15.09 0.7823
2019-08-06 2019-06-30 13F PFIZER COMMON 717081103 194,274 31 0.02 8,416 2.01 0.9414
2019-04-30 2019-03-31 13F PFIZER COMMON 717081103 194,243 5,004 2.64 8,250 -0.13 0.9576
2019-02-07 2018-12-31 13F PFIZER COMMON 717081103 189,239 -10,905 -5.45 8,260 -6.35 1.0642
2018-10-23 2018-09-30 13F PFIZER COMMON 717081103 200,144 -985 -0.49 8,820 20.89 0.9215
2018-08-09 2018-06-30 13F PFIZER COMMON 717081103 201,129 -788 -0.39 7,297 1.81 0.8138
2018-05-02 2018-03-31 13F PFIZER COMMON 717081103 201,917 -5,739 -2.76 7,166 -4.72 0.7946
2018-01-30 2017-12-31 13F PFIZER COMMON 717081103 207,656 134 0.06 7,521 1.53 0.8067
2017-11-06 2017-09-30 13F PFIZER COMMON 717081103 207,522 -1,068 -0.51 7,409 5.74 0.8419
2017-07-26 2017-06-30 13F PFIZER COMMON 717081103 208,590 -9,832 -4.50 7,007 -6.24 0.8033
2017-05-02 2017-03-31 13F PFIZER COMMON 717081103 218,422 110 0.05 7,472 5.39 0.8724
2017-01-31 2016-12-31 13F PFIZER COMMON 717081103 218,312 -11,712 -5.09 7,091 -8.99 0.8594
2016-10-27 2016-09-30 13F PFIZER COMMON 717081103 230,024 -1,761 -0.76 7,791 -4.55 0.9486
2016-08-12 2016-06-30 13F PFIZER COMMON 717081103 231,785 -472 -0.20 8,161 18.55 1.0167
2016-05-12 2016-03-31 13F PFIZER COMMON 717081103 232,257 -225 -0.10 6,884 -8.26 0.8598
2016-02-02 2015-12-31 13F PFIZER COMMON 717081103 232,482 1,760 0.76 7,505 3.56 0.9776
2015-11-13 2015-09-30 13F/A-1 PFIZER COMMON 717081103 230,722 775 0.34 7,247 -6.02 0.9973
2015-11-12 2015-09-30 13F PFIZER COMMON 717081103 229,947 7,710
2015-08-13 2015-06-30 13F PFIZER COMMON 717081103 229,947 382 0.17 7,710 -3.46 0.9753
2015-05-14 2015-03-31 13F PFIZER COMMON 717081103 229,565 1,767 0.78 7,987 12.56 1.0118
2015-02-19 2014-12-31 13F PFIZER COMMON 717081103 227,798 1,723 0.76 7,096 6.13 0.8725
2014-11-12 2014-09-30 13F PFIZER COMMON 717081103 226,075 -1,200 -0.53 6,685 -0.89 0.8432
2014-08-26 2014-06-30 13F PFIZER COMMON 717081103 227,275 0 0.00 6,746 -7.60 0.8318
2014-05-08 2014-03-31 13F PFIZER COMMON 717081103 227,275 727 0.32 7,300 5.20 0.9380
2014-02-10 2013-12-31 13F PFIZER COMMON 717081103 226,548 2,680 1.20 6,939 7.92 0.9109
2013-11-05 2013-09-30 13F PFIZER COMMON 717081103 223,868 -1,281 -0.57 6,431 1.97 0.9225
2013-07-24 2013-06-30 13F PFIZER COMMON 717081103 225,149 225,149 6,306 0.9348
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.