Pfizer Inc.
US ˙ NYSE ˙ US7170811035

SecurityPFE / Pfizer Inc.
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Boothbay Fund Management, Llc ownership in PFE / Pfizer Inc.

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 0 shares of Pfizer Inc. (US:PFE) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 12,127 shares of Pfizer Inc.. The current value of the position is $0 USD.

Boothbay Fund Management, 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 and put 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)
2026-05-15 2026-03-31 13F PFIZER COM 717081103 0 -100.00 0
2026-02-17 2025-12-31 13F PFIZER COM 717081103 12,127 -42,063 -77.62 302 -78.19 0.0045
2025-11-14 2025-09-30 13F PFIZER COM 717081103 54,190 -32,822 -37.72 1,381 -34.57 0.0201
2025-08-14 2025-06-30 13F PFIZER COM 717081103 87,012 87,012 2,109 0.0410
2025-05-15 2025-03-31 13F PFIZER COM 717081103 0 -50,336 -100.00 0 -100.00
2025-02-14 2024-12-31 13F PFIZER COM 717081103 50,336 50,336 1,335 0.0329
2024-11-14 2024-09-30 13F PFIZER COM 717081103 0 -68,856 -100.00 0 -100.00
2024-08-14 2024-06-30 13F PFIZER COM 717081103 68,856 68,856 1,927 0.0456
2023-08-14 2023-06-30 13F PFIZER COM 717081103 0 -148,262 -100.00 0 -100.00
2023-05-15 2023-03-31 13F PFIZER COM 717081103 148,262 148,262 6,049 0.1241
2023-02-14 2022-12-31 13F PFIZER COM 717081103 0 -6,648 -100.00 0 -100.00
2022-11-14 2022-09-30 13F PFIZER COM 717081103 6,648 -4,697 -41.40 291 -51.09 0.0073
2022-08-15 2022-06-30 13F PFIZER COM 717081103 11,345 458 4.21 595 5.50 0.0157
2022-05-16 2022-03-31 13F PFIZER COM 717081103 10,887 -1,214,516 -99.11 564 -99.22 0.0131
2022-02-14 2021-12-31 13F PFIZER COM 717081103 1,225,403 1,225,403 72,360 1.7023
2021-05-17 2021-03-31 13F PFIZER COM 717081103 0 -7,816 -100.00 0 -100.00
2021-02-12 2020-12-31 13F PFIZER COM 717081103 7,816 7,816 288 0.0107
2017-08-14 2017-06-30 13F Pfizer COM 717081103 0 -13,374 -100.00 0 -100.00
2017-05-15 2017-03-31 13F Pfizer COM 717081103 13,374 3,638 37.37 458 -56.87 0.0854
2017-07-18 2016-12-31 13F/A-2 Pfizer COM 717081103 9,736 -296 -2.95 1,062 275.27 0.2418
2017-02-16 2016-12-31 13F/A-1 PFIZER COM 717081103 9,736 0 316 0.0780
2017-02-15 2016-12-31 13F PFIZER COM 717081103 9,736 316
2016-11-14 2016-09-30 13F Pfizer EQUITIES 717081103 10,032 1,990 24.75 0 -100.00 0.1057
2017-07-18 2016-06-30 13F/A-1 PFIZER COM 717081103 8,042 -10,431 -56.47 283 -48.36 0.1399
2016-08-15 2016-06-30 13F PFIZER COM 717081103 8,042 283
2017-07-18 2016-03-31 13F/A-4 Pfizer COM 717081103 18,473 18,473 548 0.4093
2016-05-16 2016-03-31 13F PFIZER COM 717081103 18,473 548
2017-07-18 2015-12-31 13F/A-3 PFIZER COM 717081103 0 -10,301 -100.00 0 -100.00
2016-06-09 2015-09-30 13F/A-1 PFIZER COM 717081103 10,301 -25,349 -71.11 324 45.95 0.3021
2015-11-16 2015-09-30 13F PFIZER COM 717081103 10,102 317
2017-07-18 2014-12-31 13F/A-3 PFIZER COM 717081103 35,650 35,650 222 0.2136
2016-06-09 2014-12-31 13F/A-1 PFIZER COM 717081103 7,130 -28,520 222 0.2162
2015-02-17 2014-12-31 13F PFIZER COM 717081103 7,130 222
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
(%)
2026-05-15 2026-03-31 13F PFIZER COM Call 0 -100.00 0 n/a n/a n/a
2026-02-17 2025-12-31 13F PFIZER COM Call 41,800 1,041 n/a n/a n/a
2024-11-14 2024-09-30 13F PFIZER COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2024-08-14 2024-06-30 13F PFIZER COM Call 62,800 1,757 n/a n/a n/a
2024-02-14 2023-12-31 13F PFIZER COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-11-14 2023-09-30 13F PFIZER COM Call 40,000 1,327 n/a n/a n/a
2023-05-15 2023-03-31 13F PFIZER COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2023-02-14 2022-12-31 13F PFIZER COM Call 250,700 2,042.74 12,846 2,408.79 n/a n/a n/a
2022-11-14 2022-09-30 13F PFIZER COM Call 11,700 105.26 512 71.24 n/a n/a n/a
2022-08-15 2022-06-30 13F PFIZER COM Call 5,700 -70.92 299 -70.54 n/a n/a n/a
2022-05-16 2022-03-31 13F PFIZER COM Call 19,600 -41.67 1,015 -48.84 n/a n/a n/a
2022-02-14 2021-12-31 13F PFIZER COM Call 33,600 1,984 n/a n/a n/a
2021-05-17 2021-03-31 13F PFIZER CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-02-12 2020-12-31 13F PFIZER CALL Call 324 172.27 1,193 173.00 n/a n/a n/a
2020-11-16 2020-09-30 13F PFIZER CALL Call 119 437 n/a n/a n/a
2018-08-14 2018-06-30 13F PFIZER CALL Call 0 -100.00 0 -100.00 n/a n/a n/a
2018-05-14 2018-03-31 13F PFIZER CALL Call 157 557 n/a n/a n/a
Disclosed Put 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
(%)
2024-11-14 2024-09-30 13F PFIZER COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-08-14 2024-06-30 13F PFIZER COM Put 94,600 2,647 n/a n/a n/a
2023-08-14 2023-06-30 13F PFIZER COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2023-05-15 2023-03-31 13F PFIZER COM Put 142,500 5,814 n/a n/a n/a
2023-02-14 2022-12-31 13F PFIZER COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F PFIZER COM Put 20,300 37.16 888 14.43 n/a n/a n/a
2022-08-15 2022-06-30 13F PFIZER COM Put 14,800 -48.25 776 -47.60 n/a n/a n/a
2022-05-16 2022-03-31 13F PFIZER COM Put 28,600 -97.86 1,481 -98.12 n/a n/a n/a
2022-02-14 2021-12-31 13F PFIZER COM Put 1,334,400 78,796 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.