Pfizer Inc.
CL ˙ SNSE ˙ US7170811035
SecurityCL:PFE / Pfizer Inc.
InstitutionPort Capital LLC
Latest Disclosed Ownership8,859 shares
Latest Disclosed Value $ 248,761
Port Capital LLC ownership in PFE / Pfizer Inc.

On May 15, 2026 - Port Capital LLC filed a 13F-HR form disclosing ownership of 8,859 shares of Pfizer Inc. (CL:PFE) valued at $248,761 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 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)
2026-05-15 2026-03-31 13F PFIZER COM 717081103 8,859 8,859 249 0.0111
2026-02-17 2025-12-31 13F PFIZER COM 717081103 0 -9,219 -100.00 0 -100.00
2025-11-14 2025-09-30 13F PFIZER COM 717081103 9,219 342 3.85 235 9.30 0.0098
2025-08-14 2025-06-30 13F PFIZER COM 717081103 8,877 -800 -8.27 215 -12.24 0.0091
2025-05-15 2025-03-31 13F PFIZER COM 717081103 9,677 -162 -1.65 245 -6.13 0.0111
2025-02-14 2024-12-31 13F PFIZER COM 717081103 9,839 1,881 23.64 261 13.48 0.0119
2024-11-14 2024-09-30 13F PFIZER COM 717081103 7,958 -1,428 -15.21 230 -12.55 0.0103
2024-08-14 2024-06-30 13F PFIZER INC COM COM 717081103 9,386 -109 -1.15 263 0.00 0.0132
2024-05-15 2024-03-31 13F PFIZER INC COM COM 717081103 9,495 153 1.64 263 -2.23 0.0132
2024-02-15 2023-12-31 13F PFIZER INC COM COM 717081103 9,342 310 3.43 269 -10.33 0.0150
2023-11-14 2023-09-30 13F PFIZER INC COM COM 717081103 9,032 73 0.81 300 -8.81 0.0187
2023-08-14 2023-06-30 13F PFIZER INC COM COM 717081103 8,959 229 2.62 329 -7.58 0.0198
2023-05-15 2023-03-31 13F PFIZER INC COM COM 717081103 8,730 -1,405 -13.86 356 -31.41 0.0231
2023-02-15 2022-12-31 13F PFIZER INC COM COM 717081103 10,135 -524 -4.92 519 11.37 0.0375
2022-11-14 2022-09-30 13F PFIZER INC COM COM 717081103 10,659 668 6.69 466 -11.07 0.0378
2022-08-15 2022-06-30 13F PFIZER INC COM COM 717081103 9,991 -302 -2.93 524 -1.69 0.0410
2022-05-16 2022-03-31 13F PFIZER INC COM COM 717081103 10,293 164 1.62 533 -10.87 0.0369
2022-02-14 2021-12-31 13F PFIZER INC COM COM 717081103 10,129 -193 -1.87 598 34.68 0.0368
2021-11-15 2021-09-30 13F PFIZER INC COM COM 717081103 10,322 -147 -1.40 444 8.29 0.0224
2021-08-16 2021-06-30 13F PFIZER INC COM COM 717081103 10,469 81 0.78 410 9.04 0.0213
2021-05-17 2021-03-31 13F PFIZER INC COM COM 717081103 10,388 -2,585 -19.93 376 -21.34 0.0213
2021-02-16 2020-12-31 13F PFIZER INC COM COM 717081103 12,973 173 1.35 478 1.70 0.0325
2020-11-16 2020-09-30 13F PFIZER INC COM COM 717081103 12,800 -101 -0.78 470 11.37 0.0405
2020-08-17 2020-06-30 13F/A-1 PFIZER INC COM COM 717081103 12,901 212 1.67 422 1.93 0.0407
2020-08-14 2020-06-30 13F PFIZER INC COM COM 717081103 12,901 212 422 48,913.6419
2020-05-15 2020-03-31 13F PFIZER INC COM COM 717081103 12,689 -40 -0.31 414 -17.03 0.0576
2020-02-14 2019-12-31 13F PFIZER INC COM COM 717081103 12,729 0 0.00 499 9.19 0.0551
2019-11-14 2019-09-30 13F PFIZER INC COM COM 717081103 12,729 -267 -2.05 457 -18.83 0.0522
2019-08-14 2019-06-30 13F PFIZER INC COM COM 717081103 12,996 -2,420 -15.70 563 -14.05 0.0664
2019-05-15 2019-03-31 13F PFIZER INC COM COM 717081103 15,416 34 0.22 655 -2.38 0.0857
2019-02-13 2018-12-31 13F PFIZER COM 717081103 15,382 -62 -0.40 671 -1.47 0.1020
2018-11-14 2018-09-30 13F PFIZER INC COM COM 717081103 15,444 15,444 681 0.0825
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.