Pfizer Inc.
US ˙ NYSE ˙ US7170811035

SecurityPFE / Pfizer Inc.
InstitutionLevel Four Advisory Services, Llc
Latest Disclosed Ownership66,563 shares
Latest Disclosed Value $ 1,869,025
Level Four Advisory Services, Llc ownership in PFE / Pfizer Inc.

On May 14, 2026 - Level Four Advisory Services, Llc filed a 13F-HR form disclosing ownership of 66,563 shares of Pfizer Inc. (US:PFE) valued at $1,869,089 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 76,028 shares of Pfizer Inc.. This represents a change in shares of -12.45% during the quarter. The current value of the position is $1,686,706 USD.

Level Four Advisory Services, Llc has a history of taking positions in derivatives of the underlying security (PFE) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

PFE / Pfizer Inc. Historical Put/Call Ratio
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)
2026-05-14 2026-03-31 13F PFIZER COM 717081103 66,563 -9,465 -12.45 1,869 -1.27 0.0614
2026-02-13 2025-12-31 13F PFIZER COM 717081103 76,028 671 0.89 1,893 -1.41 0.0619
2025-11-12 2025-09-30 13F PFIZER COM 717081103 75,357 4,356 6.14 1,920 11.56 0.0657
2025-08-13 2025-06-30 13F PFIZER COM 717081103 71,001 -92,053 -56.46 1,721 -58.34 0.0634
2025-05-14 2025-03-31 13F PFIZER COM 717081103 163,054 8,190 5.29 4,132 0.56 0.1699
2025-02-12 2024-12-31 13F PFIZER COM 717081103 154,864 -9,265 -5.64 4,109 -11.54 0.1679
2024-11-14 2024-09-30 13F PFIZER COM 717081103 164,129 -56,218 -25.51 4,645 -24.67 0.1955
2024-08-09 2024-06-30 13F PFIZER COM 717081103 220,347 126,313 134.33 6,165 127.74 0.2779
2024-05-13 2024-03-31 13F PFIZER COM 717081103 94,034 276 0.29 2,707 0.30 0.1487
2024-02-08 2023-12-31 13F PFIZER COM 717081103 93,758 -36,197 -27.85 2,699 -37.38 0.1514
2023-11-13 2023-09-30 13F PFIZER COM 717081103 129,955 -23,616 -15.38 4,311 -23.47 0.2779
2023-07-10 2023-06-30 13F PFIZER COM 717081103 153,571 2,221 1.47 5,633 -8.79 0.3384
2023-06-05 2023-03-31 13F PFIZER COM 717081103 151,350 -2,958 -1.92 6,175 -21.89 0.4050
2023-02-13 2022-12-31 13F PFIZER COM 717081103 154,308 30,369 24.50 7,907 45.76 0.5869
2022-11-07 2022-09-30 13F PFIZER COM 717081103 123,939 2,603 2.15 5,424 -14.74 0.5272
2022-08-08 2022-06-30 13F PFIZER COM 717081103 121,336 6,570 5.72 6,362 7.09 0.6001
2022-05-10 2022-03-31 13F PFIZER COM 717081103 114,766 -5,729 -4.75 5,941 -16.50 0.4654
2022-02-11 2021-12-31 13F PFIZER COM 717081103 120,495 24,926 26.08 7,115 73.11 0.5425
2021-10-12 2021-09-30 13F PFIZER COM 717081103 95,569 -31,114 -24.56 4,110 -17.15 0.4274
2021-08-09 2021-06-30 13F PFIZER COM 717081103 126,683 8,696 7.37 4,961 16.05 0.3430
2021-05-10 2021-03-31 13F PFIZER COM 717081103 117,987 -3,144 -2.60 4,275 -4.13 0.3320
2021-02-10 2020-12-31 13F PFIZER COM 717081103 121,131 -3,785 -3.03 4,459 -2.73 0.3579
2020-11-02 2020-09-30 13F PFIZER COM 717081103 124,916 17,307 16.08 4,584 30.45 0.3531
2020-08-17 2020-06-30 13F/A-1 PFIZER COM 717081103 107,609 5,801 5.70 3,514 5.97 0.2718
2020-05-13 2020-03-31 13F PFIZER COM 717081103 101,808 -6,700 -6.17 3,316 -73.23 0.3977
2020-02-13 2019-12-31 13F PFIZER COM 717081103 108,508 9,989 10.14 12,389 250.07 0.4905
2019-11-12 2019-09-30 13F PFIZER COM 717081103 98,519 9,177 10.27 3,539 -8.53 0.3662
2019-08-14 2019-06-30 13F PFIZER COM 717081103 89,342 -1,545 -1.70 3,869 0.26 0.3906
2019-05-15 2019-03-31 13F PFIZER COM 717081103 90,887 -1,064 -1.16 3,859 -3.86 0.4250
2019-02-07 2018-12-31 13F PFIZER COM 717081103 91,951 -590 -0.64 4,014 -1.57 0.5005
2018-11-14 2018-09-30 13F PFIZER COM 717081103 92,541 -33,639 -26.66 4,078 -10.90 0.4407
2018-08-14 2018-06-30 13F PFIZER COM 717081103 126,180 -2,419 -1.88 4,577 0.28 0.3334
2018-05-14 2018-03-31 13F PFIZER COM 717081103 128,599 3,543 2.83 4,564 0.75 0.3539
2018-02-13 2017-12-31 13F PFIZER COM 717081103 125,056 3,985 3.29 4,530 4.81 0.3524
2018-04-03 2017-09-30 13F/A-1 PFIZER COM 717081103 121,071 23,506 24.09 4,322 29.56 0.3831
2017-11-15 2017-09-30 13F PFIZER COM 717081103 114,548 16,983 4,124
2017-09-20 2017-06-30 13F/A-1 PFIZER COM 717081103 97,565 -33,827 -25.75 3,336 -25.75 0.5136
2017-07-12 2017-06-30 13F PFIZER COM 717081103 97,565 3,336
2017-09-20 2017-03-31 13F/A-1 PFIZER COM 717081103 131,392 -879 -0.66 4,493 4.59 0.4577
2017-05-15 2017-03-31 13F PFIZER COM 717081103 131,392 -879 4,493
2017-02-14 2016-12-31 13F PFIZER COM 717081103 132,271 132,271 4,296 0.5484
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2023-06-05 2023-03-31 13F PFIZER COM Call 0 -100.00 0 n/a n/a n/a
2023-02-13 2022-12-31 13F PFIZER COM Call 1,700 0.00 0 n/a n/a n/a
2022-11-07 2022-09-30 13F PFIZER COM Call 1,700 0.00 0 -100.00 n/a n/a n/a
2022-08-08 2022-06-30 13F PFIZER COM Call 1,700 0.00 3 0.00 n/a n/a n/a
2022-05-10 2022-03-31 13F PFIZER COM Call 1,700 0.00 3 -72.73 n/a n/a n/a
2022-02-11 2021-12-31 13F PFIZER COM Call 1,700 11 n/a n/a n/a
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.