Pfizer Inc.
US ˙ NYSE ˙ US7170811035

SecurityPFE / Pfizer Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership36,422,799 shares
Latest Disclosed Value $ 1,022,606,022
Dimensional Fund Advisors Lp reports 0.81% increase in ownership of PFE / Pfizer Inc.

On May 7, 2026 - Dimensional Fund Advisors Lp filed a 13F-HR form disclosing ownership of 36,422,799 shares of Pfizer Inc. (US:PFE) valued at $1,022,752,196 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 36,129,770 shares of Pfizer Inc.. This represents a change in shares of 0.81% during the quarter. The current value of the position is $922,953,727 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)
2026-05-07 2026-03-31 13F PFIZER COM 717081103 36,422,799 293,029 0.81 1,022,606 13.67 0.0458
2026-02-12 2025-12-31 13F PFIZER COM 717081103 36,129,770 -205,761 -0.57 899,665 -2.75 0.1887
2025-11-12 2025-09-30 13F PFIZER COM 717081103 36,335,531 1,579,117 4.54 925,109 9.81 0.1985
2025-08-12 2025-06-30 13F PFIZER COM 717081103 34,756,414 5,430,166 18.52 842,485 13.38 0.1951
2025-05-13 2025-03-31 13F PFIZER COM 717081103 29,326,248 61,970 0.21 743,036 -4.29 0.1847
2025-02-13 2024-12-31 13F PFIZER COM 717081103 29,264,278 -4,126,655 -12.36 776,346 -19.66 0.1865
2024-11-07 2024-09-30 13F PFIZER COM 717081103 33,390,933 72,077 0.22 966,384 3.66 0.2344
2024-08-09 2024-06-30 13F PFIZER COM 717081103 33,318,856 -2,370,984 -6.64 932,250 -5.87 0.2435
2024-05-10 2024-03-31 13F PFIZER COM 717081103 35,689,840 -6,284,547 -14.97 990,393 -18.04 0.2681
2024-02-07 2023-12-31 13F PFIZER COM 717081103 41,974,387 -3,264,945 -7.22 1,208,444 -19.45 0.3529
2023-11-09 2023-09-30 13F PFIZER COM 717081103 45,239,332 -1,763,101 -3.75 1,500,232 -12.97 0.4920
2023-08-09 2023-06-30 13F PFIZER COM 717081103 47,002,433 3,357,154 7.69 1,723,873 -3.19 0.5494
2023-05-12 2023-03-31 13F PFIZER COM 717081103 43,645,279 1,540,360 3.66 1,780,597 82,449.70 0.5998
2023-02-09 2022-12-31 13F PFIZER COM 717081103 42,104,919 862,505 2.09 2,157 -99.88 0.6374
2022-11-10 2022-09-30 13F PFIZER COM 717081103 41,242,414 1,009,399 2.51 1,804,896 -14.42 0.6929
2022-08-12 2022-06-30 13F PFIZER COM 717081103 40,233,015 1,331,272 3.42 2,108,947 4.71 0.7565
2022-05-13 2022-03-31 13F PFIZER COM 717081103 38,901,743 -312,657 -0.80 2,014,119 -13.01 0.6204
2022-02-09 2021-12-31 13F PFIZER COM 717081103 39,214,400 -340,280 -0.86 2,315,394 36.08 0.7000
2021-11-12 2021-09-30 13F PFIZER COM 717081103 39,554,680 -288,314 -0.72 1,701,448 9.05 0.5481
2021-08-12 2021-06-30 13F PFIZER COM 717081103 39,842,994 -19,302 -0.05 1,560,236 8.04 0.4940
2021-05-14 2021-03-31 13F PFIZER COM 717081103 39,862,296 -976,056 -2.39 1,444,187 -3.93 0.4777
2021-03-08 2020-12-31 13F/A-2 PFIZER COM 717081103 40,838,352 -1,696,187 -3.99 1,503,241 -3.69 0.5428
2021-02-11 2020-12-31 13F PFIZER COM 717081103 40,838,352 -1,696,187 1,503,241 542,890.7476
2020-11-12 2020-09-30 13F PFIZER COM 717081103 42,534,539 -5,722,209 -11.86 1,560,809 -1.09 0.6619
2020-08-13 2020-06-30 13F PFIZER COM 717081103 48,256,748 -465,362 -0.96 1,577,971 -0.77 0.6936
2020-05-14 2020-03-31 13F PFIZER COM 717081103 48,722,110 80,756 0.17 1,590,262 -16.55 0.8285
2020-02-14 2019-12-31 13F PFIZER COM 717081103 48,641,354 284,797 0.59 1,905,730 9.68 0.6945
2019-11-12 2019-09-30 13F PFIZER COM 717081103 48,356,557 10,788 0.02 1,737,506 -17.04 0.6752
2019-08-13 2019-06-30 13F PFIZER COM 717081103 48,345,769 -2,303,704 -4.55 2,094,370 -2.64 0.8132
2019-08-12 2019-03-31 13F/A-2 PFIZER COM 717081103 50,649,473 -1,425,559 -2.74 2,151,054 -5.36 0.8567
2019-05-10 2019-03-31 13F PFIZER COM 717081103 50,649,473 26,852,983 2,151,054
2019-02-26 2018-12-31 13F/A-1 PFIZER COM 717081103 52,075,032 -1,261,733 -2.37 2,272,888 -3.30 1.0296
2019-02-13 2018-12-31 13F PFIZER COM 717081103 52,075,032 27,502,440 2,272,888
2018-11-13 2018-09-30 13F PFIZER COM 717081103 53,336,765 -896,893 -1.65 2,350,472 19.46 0.8947
2018-08-10 2018-06-30 13F PFIZER COM 717081103 54,233,658 7,059,171 14.96 1,967,651 17.53 0.7844
2018-05-11 2018-03-31 13F PFIZER COM 717081103 47,174,487 4,998,981 11.85 1,674,223 9.60 0.6978
2018-02-12 2017-12-31 13F PFIZER COM 717081103 42,175,506 -861,892 -2.00 1,527,631 -0.57 0.6333
2017-11-13 2017-09-30 13F PFIZER COM 717081103 43,037,398 -1,249,146 -2.82 1,536,410 3.28 0.6714
2017-08-11 2017-06-30 13F PFIZER COM 717081103 44,286,544 2,028,313 4.80 1,487,617 2.90 0.6868
2017-05-12 2017-03-31 13F PFIZER COM 717081103 42,258,231 2,203,543 5.50 1,445,675 11.12 0.6909
2017-02-09 2016-12-31 13F PFIZER COM 717081103 40,054,688 -518,209 -1.28 1,300,992 -5.32 0.6498
2016-11-10 2016-09-30 13F PFIZER COM 717081103 40,572,897 -116,013 -0.29 1,374,075 -4.09 0.7427
2016-08-09 2016-06-30 13F PFIZER COM 717081103 40,688,910 -2,032,667 -4.76 1,432,627 13.13 0.8243
2016-05-13 2016-03-31 13F PFIZER COM 717081103 42,721,577 -525,980 -1.22 1,266,397 -9.30 0.7580
2016-02-10 2015-12-31 13F PFIZER COM 717081103 43,247,557 -1,348,054 -3.02 1,396,177 -0.32 0.8702
2015-11-13 2015-09-30 13F PFIZER COM 717081103 44,595,611 -688,717 -1.52 1,400,712 -7.75 0.9194
2015-08-14 2015-06-30 13F PFIZER COM 717081103 45,284,328 3,887,935 9.39 1,518,458 5.44 0.9298
2015-05-14 2015-03-31 13F PFIZER COM 717081103 41,396,393 -2,920,684 -6.59 1,440,181 4.32 0.9094
2015-02-06 2014-12-31 13F PFIZER COM 717081103 44,317,077 -340,610 -0.76 1,380,603 4.54 0.9067
2014-11-13 2014-09-30 13F PFIZER COM 717081103 44,657,687 1,680,745 3.91 1,320,669 3.54 0.9358
2014-08-08 2014-06-30 13F PFIZER COM 717081103 42,976,942 8,078,399 23.15 1,275,518 13.79 0.8866
2014-05-14 2014-03-31 13F PFIZER COM 717081103 34,898,543 6,394,657 22.43 1,120,975 28.39 0.8376
2014-02-12 2013-12-31 13F PFIZER COM 717081103 28,503,886 430,987 1.54 873,101 8.33 0.6804
2013-11-13 2013-09-30 13F PFIZER COM 717081103 28,072,899 3,958,606 16.42 805,969 19.32 0.6976
2013-08-15 2013-06-30 13F PFIZER COM 717081103 24,114,293 24,114,293 675,447 0.6361
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.