Pfizer Inc.
US ˙ NYSE ˙ US7170811035

SecurityPFE / Pfizer Inc.
InstitutionBoston Trust Walden Corp
Latest Disclosed Ownership68,379 shares
Latest Disclosed Value $ 1,920,082
Boston Trust Walden Corp reports 3.29% decrease in ownership of PFE / Pfizer Inc.

On April 24, 2026 - Boston Trust Walden Corp filed a 13F-HR form disclosing ownership of 68,379 shares of Pfizer Inc. (US:PFE) valued at $1,920,082 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 28, 2026 disclosing 70,704 shares of Pfizer Inc.. This represents a change in shares of -3.29% during the quarter. The current value of the position is $1,732,724 USD.

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)
2026-04-24 2026-03-31 13F PFIZER COMMON STOCK 717081103 68,379 -2,325 -3.29 1,920 9.09 0.0094
2026-01-28 2025-12-31 13F PFIZER COMMON STOCK 717081103 70,704 -225 -0.32 1,761 -2.60 0.0133
2025-10-17 2025-09-30 13F PFIZER COMMON STOCK 717081103 70,929 -33 -0.05 1,807 5.06 0.0133
2025-07-28 2025-06-30 13F PFIZER COMMON STOCK 717081103 70,962 -1,900 -2.61 1,720 -6.83 0.0123
2025-04-21 2025-03-31 13F PFIZER COMMON STOCK 717081103 72,862 1,821 2.56 1,846 -2.02 0.0135
2025-01-24 2024-12-31 13F PFIZER COMMON STOCK 717081103 71,041 -280 -0.39 1,885 -8.72 0.0132
2024-10-24 2024-09-30 13F PFIZER COMMON STOCK 717081103 71,321 -1,261 -1.74 2,064 1.67 0.0144
2024-07-19 2024-06-30 13F PFIZER COMMON STOCK 717081103 72,582 -2,997 -3.97 2,031 -3.20 0.0151
2024-04-22 2024-03-31 13F PFIZER COMMON STOCK 717081103 75,579 -4,820 -6.00 2,097 -9.38 0.0150
2024-01-24 2023-12-31 13F PFIZER COMMON STOCK 717081103 80,399 -3,751 -4.46 2,315 -17.09 0.0175
2023-10-18 2023-09-30 13F PFIZER COMMON STOCK 717081103 84,150 -1,847 -2.15 2,791 -11.51 0.0234
2023-07-24 2023-06-30 13F PFIZER COMMON STOCK 717081103 85,997 1,303 1.54 3,154 -8.71 0.0259
2023-04-19 2023-03-31 13F PFIZER COMMON STOCK 717081103 84,694 -4,295 -4.83 3,456 -24.22 0.0298
2023-01-20 2022-12-31 13F PFIZER COMMON STOCK 717081103 88,989 0 0.00 4,560 17.08 0.0401
2022-10-19 2022-09-30 13F PFIZER COMMON STOCK 717081103 88,989 1,445 1.65 3,894 -15.16 0.0386
2022-07-22 2022-06-30 13F PFIZER COMMON STOCK 717081103 87,544 1,741 2.03 4,590 3.33 0.0434
2022-04-20 2022-03-31 13F PFIZER COMMON STOCK 717081103 85,803 -3,768 -4.21 4,442 -16.01 0.0367
2022-01-21 2021-12-31 13F PFIZER COMMON STOCK 717081103 89,571 5,143 6.09 5,289 45.66 0.0425
2021-10-25 2021-09-30 13F PFIZER COMMON STOCK 717081103 84,428 -1,646 -1.91 3,631 7.71 0.0322
2021-07-22 2021-06-30 13F PFIZER COMMON STOCK 717081103 86,074 -267 -0.31 3,371 7.77 0.0300
2021-04-21 2021-03-31 13F PFIZER COMMON STOCK 717081103 86,341 -275 -0.32 3,128 -1.88 0.0303
2021-01-15 2020-12-31 13F PFIZER COMMON STOCK 717081103 86,616 1,080 1.26 3,188 1.56 0.0340
2020-10-14 2020-09-30 13F PFIZER COMMON STOCK 717081103 85,536 -690 -0.80 3,139 11.31 0.0391
2020-07-23 2020-06-30 13F PFIZER COMMON STOCK 717081103 86,226 -325 -0.38 2,820 -0.18 0.0381
2020-04-24 2020-03-31 13F/A-1 PFIZER COMMON STOCK 717081103 86,551 -5,399 -5.87 2,825 -21.59 0.0450
2020-04-21 2020-03-31 13F PFIZER COMMON STOCK 717081103 86,551 -5,399 2,825 25,050.1313
2020-01-10 2019-12-31 13F PFIZER COMMON STOCK 717081103 91,950 90 0.10 3,603 9.15 0.0419
2019-10-21 2019-09-30 13F PFIZER COMMON STOCK 717081103 91,860 -1,604 -1.72 3,301 -18.47 0.0415
2019-07-25 2019-06-30 13F PFIZER COMMON STOCK 717081103 93,464 204 0.22 4,049 2.22 0.0527
2019-04-16 2019-03-31 13F PFIZER COMMON STOCK 717081103 93,260 -2,871 -2.99 3,961 -5.60 0.0539
2019-01-17 2018-12-31 13F PFIZER COMMON STOCK 717081103 96,131 -710 -0.73 4,196 -1.69 0.0668
2018-10-23 2018-09-30 13F PFIZER COMMON STOCK 717081103 96,841 33 0.03 4,268 21.53 0.0588
2018-07-25 2018-06-30 13F PFIZER COMMON STOCK 717081103 96,808 -1,125 -1.15 3,512 1.04 0.0515
2018-04-13 2018-03-31 13F PFIZER COMMON STOCK 717081103 97,933 4,141 4.42 3,476 2.33 0.0527
2018-01-29 2017-12-31 13F PFIZER COMMON STOCK 717081103 93,792 1,459 1.58 3,397 3.06 0.0498
2017-10-13 2017-09-30 13F PFIZER COMMON STOCK 717081103 92,333 90 0.10 3,296 6.39 0.0513
2017-07-19 2017-06-30 13F PFIZER COMMON STOCK 717081103 92,243 2,646 2.95 3,098 1.08 0.0498
2017-04-24 2017-03-31 13F PFIZER COMMON STOCK 717081103 89,597 1,450 1.64 3,065 7.06 0.0478
2017-02-07 2016-12-31 13F/A-1 PFIZER COMMON STOCK 717081103 88,147 257 0.29 2,863 -3.83 0.0451
2017-02-01 2016-12-31 13F PFIZER COMMON STOCK 717081103 88,147 2,863
2016-10-17 2016-09-30 13F PFIZER COMMON STOCK 717081103 87,890 -543 -0.61 2,977 -4.40 0.0491
2016-08-09 2016-06-30 13F PFIZER COMMON STOCK 717081103 88,433 55 0.06 3,114 18.85 0.0532
2016-04-19 2016-03-31 13F PFIZER COMMON STOCK 717081103 88,378 -650 -0.73 2,620 -8.84 0.0456
2016-01-21 2015-12-31 13F PFIZER COMMON STOCK 717081103 89,028 -3,443 -3.72 2,874 -1.07 0.0533
2015-10-29 2015-09-30 13F PFIZER COMMON STOCK 717081103 92,471 3,698 4.17 2,905 -2.42 0.0485
2015-07-17 2015-06-30 13F PFIZER COMMON STOCK 717081103 88,773 510 0.58 2,977 -3.06 0.0454
2015-04-15 2015-03-31 13F PFIZER COMMON STOCK 717081103 88,263 88,263 0.00 3,071 0.0456
2015-01-28 2014-12-31 13F PFIZER COMMON STOCK 717081103 0 -87,679 -100.00 0 -100.00
2014-10-23 2014-09-30 13F PFIZER COMMON STOCK 717081103 87,679 -167 -0.19 2,593 -0.54 0.0400
2014-08-01 2014-06-30 13F PFIZER COMMON STOCK 717081103 87,846 0 0.00 2,607 -7.62 0.0379
2014-04-11 2014-03-31 13F PFIZER COMMON STOCK 717081103 87,846 -13,657 -13.45 2,822 -9.23 0.0419
2014-02-11 2013-12-31 13F PFIZER COMMON STOCK 717081103 101,503 -315 -0.31 3,109 6.29 0.0454
2013-11-15 2013-09-30 13F PFIZER COMMON STOCK 717081103 101,818 11,814 13.13 2,925 16.03 0.0448
2013-08-08 2013-06-30 13F PFIZER COMMON STOCK 717081103 90,004 90,004 2,521 0.0407
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.