Vaxcyte, Inc.
US ˙ NasdaqGS ˙ US92243G1085

SecurityPCVX / Vaxcyte, Inc.
InstitutionBoothbay Fund Management, Llc
Latest Disclosed Ownership522,019 shares
Latest Disclosed Value $ 30,334,524
Boothbay Fund Management, Llc ownership in PCVX / Vaxcyte, Inc.

On May 15, 2026 - Boothbay Fund Management, Llc filed a 13F-HR form disclosing ownership of 522,019 shares of Vaxcyte, Inc. (US:PCVX) valued at $30,334,524 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 497,740 shares of Vaxcyte, Inc.. This represents a change in shares of 4.88% during the quarter. The current value of the position is $24,498,352 USD.

Boothbay Fund Management, Llc has a history of taking positions in derivatives of the underlying security (PCVX) in the form of stock options.

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.

PCVX / Vaxcyte, 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 VAXCYTE COM 92243G108 522,019 24,279 4.88 30,335 32.09 0.3931
2026-02-17 2025-12-31 13F VAXCYTE COM 92243G108 497,740 369,009 286.65 22,966 395.36 0.3426
2025-11-14 2025-09-30 13F VAXCYTE COM 92243G108 128,731 25,464 24.66 4,637 38.10 0.0674
2025-08-14 2025-06-30 13F VAXCYTE COM 92243G108 103,267 38,109 58.49 3,357 36.46 0.0652
2025-05-15 2025-03-31 13F VAXCYTE COM 92243G108 65,158 65,158 2,460 0.0648
2024-02-14 2023-12-31 13F VAXCYTE COM 92243G108 0 -27,919 -100.00 0 -100.00
2023-11-14 2023-09-30 13F VAXCYTE COM 92243G108 27,919 2,575 10.16 1,423 12.49 0.0338
2023-08-14 2023-06-30 13F VAXCYTE COM 92243G108 25,344 -15,333 -37.69 1,266 -16.99 0.0278
2023-05-15 2023-03-31 13F VAXCYTE COM 92243G108 40,677 -5,258 -11.45 1,525 -30.79 0.0313
2023-02-14 2022-12-31 13F VAXCYTE COM 92243G108 45,935 45,935 2,203 0.0510
2022-11-14 2022-09-30 13F VAXCYTE COM 92243G108 0 -22,733 -100.00 0 -100.00
2022-08-15 2022-06-30 13F VAXCYTE COM 92243G108 22,733 -7,636 -25.14 495 -32.47 0.0130
2022-05-16 2022-03-31 13F VAXCYTE COM 92243G108 30,369 689 2.32 733 3.82 0.0170
2022-02-14 2021-12-31 13F VAXCYTE COM 92243G108 29,680 0 0.00 706 -6.24 0.0166
2021-11-15 2021-09-30 13F VAXCYTE COM 92243G108 29,680 -19,441 -39.58 753 -31.92 0.0208
2021-08-17 2021-06-30 13F/A-1 VAXCYTE COM 92243G108 49,121 -5,810 -10.58 1,106 1.94 0.0355
2021-08-16 2021-06-30 13F VAXCYTE COM 92243G108 49,121 -5,810 1,106 0.0348
2021-05-17 2021-03-31 13F VAXCYTE COM 92243G108 54,931 25,719 88.04 1,085 39.82 0.0406
2021-02-12 2020-12-31 13F VAXCYTE COM 92243G108 29,212 29,212 776 0.0289
2020-11-16 2020-09-30 13F VAXCYTE COM 92243G108 0 -17,637 -100.00 0 -100.00
2020-08-14 2020-06-30 13F VAXCYTE COM 92243G108 17,637 17,637 558 0.0382
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
(%)
2026-05-15 2026-03-31 13F VAXCYTE COM Put 201,300 11,698 n/a n/a n/a
2025-02-14 2024-12-31 13F VAXCYTE COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2024-11-14 2024-09-30 13F VAXCYTE COM Put 3,600 411 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.