캘리포니아주 퍼시픽 바이오사이언시스(Pacific Biosciences of California, Inc.)
MX ˙ BMV ˙ US69404D1081
SecurityMX:PACB / Pacific Biosciences of California, Inc.
InstitutionProShare Advisors LLC
Latest Disclosed Ownership53,535 shares
Latest Disclosed Value $ 70,666
ProShare Advisors LLC reports 16.09% decrease in ownership of PACB / Pacific Biosciences of California, Inc.

On April 24, 2026 - ProShare Advisors LLC filed a 13F-HR form disclosing ownership of 53,535 shares of Pacific Biosciences of California, Inc. (MX:PACB) valued at $70,666 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 63,799 shares of Pacific Biosciences of California, Inc.. This represents a change in shares of -16.09% during the quarter.

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)
2026-04-24 2026-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 53,535 -10,264 -16.09 71 -41.18 0.0001
2026-02-06 2025-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 63,799 5,883 10.16 119 60.81 0.0002
2025-11-06 2025-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 57,916 -9,912 -14.61 74 -11.90 0.0002
2025-08-07 2025-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 67,828 -3,744 -5.23 84 0.00 0.0002
2025-05-08 2025-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 71,572 -18,436 -20.48 84 -48.78 0.0002
2025-02-14 2024-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 90,008 22,215 32.77 165 42.61 0.0004
2024-11-14 2024-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 67,793 17,216 34.04 115 66.67 0.0003
2024-08-13 2024-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 50,577 -13,493 -21.06 69 -71.25 0.0002
2024-05-08 2024-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 64,070 5,300 9.02 240 -58.33 0.0006
2024-02-14 2023-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 58,770 9,023 18.14 577 38.80 0.0018
2023-11-13 2023-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 49,747 84 0.17 415 -37.12 0.0013
2023-08-10 2023-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 49,663 1,445 3.00 661 18.28 0.0019
2023-05-26 2023-03-31 13F/A-1 PACIFIC BIOSCIENCES CALIF IN COM 69404D108 48,218 437 0.91 558 43.08 0.0017
2023-05-12 2023-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 48,218 437 558 0.0018
2023-02-02 2022-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 47,781 3,968 9.06 391 53.54 0.0014
2022-11-07 2022-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 43,813 -2,716 -5.84 254 23.30 0.0010
2022-08-01 2022-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 46,529 -17,843 -27.72 206 -64.85 0.0007
2022-05-10 2022-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 64,372 -14,651 -18.54 586 -63.78 0.0013
2022-02-08 2021-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 79,023 6,876 9.53 1,618 -12.21 0.0032
2021-11-12 2021-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 72,147 -13,949 -16.20 1,843 -38.79 0.0052
2021-08-13 2021-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 86,096 10,662 14.13 3,011 19.82 0.0088
2021-05-14 2021-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 75,434 7,367 10.82 2,513 42.30 0.0079
2021-02-09 2020-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 68,067 19,125 39.08 1,766 265.63 0.0066
2020-11-13 2020-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 48,942 4,547 10.24 483 215.69 0.0022
2020-08-03 2020-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 44,395 14,983 50.94 153 70.00 0.0008
2020-05-15 2020-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 29,412 -22,977 -43.86 90 -66.54 0.0006
2020-02-12 2019-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 52,389 -5,231 -9.08 269 -9.43 0.0012
2019-11-12 2019-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 57,620 -1,584 -2.68 297 -17.04 0.0017
2019-08-13 2019-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 59,204 -7,106 -10.72 358 -25.26 0.0021
2019-05-15 2019-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 66,310 1,420 2.19 479 -0.21 0.0029
2019-02-14 2018-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 64,890 -3,819 -5.56 480 29.03 0.0034
2018-11-14 2018-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 68,709 -2,757 -3.86 372 46.46 0.0025
2018-08-13 2018-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 71,466 -3,716 -4.94 254 64.94 0.0017
2018-05-14 2018-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 75,182 -2,831 -3.63 154 -25.24 0.0010
2018-02-14 2017-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 78,013 5,784 8.01 206 -45.65 0.0014
2017-11-13 2017-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 72,229 16,798 30.30 379 92.39 0.0035
2017-08-11 2017-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 55,431 -3,263 -5.56 197 -34.98 0.0020
2017-05-12 2017-03-31 13F/A-2 PACIFIC BIOSCIENCES CALIF IN COM 69404D108 58,694 -15,413 -20.80 303 7.45 0.0032
2017-05-08 2017-03-31 13F/A-1 PACIFIC BIOSCIENCES CALIF IN COM 69404D108 58,694 0 303 0.0032
2017-04-25 2017-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 58,694 303
2017-02-13 2016-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 74,107 8,300 12.61 282 -52.20 0.0031
2016-11-10 2016-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 65,807 -8,399 -11.32 590 13.03 0.0082
2016-08-12 2016-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 74,206 7,057 10.51 522 -8.58 0.0067
2016-05-06 2016-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 67,149 -3,625 -5.12 571 -38.54 0.0079
2016-02-05 2015-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 70,774 7,814 12.41 929 303.91 0.0113
2015-11-06 2015-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 62,960 -4,262 -6.34 230 -40.57 0.0032
2015-08-11 2015-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 67,222 -3,451 -4.88 387 -6.30 0.0054
2015-05-08 2015-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 70,673 70,673 5.13 413 6.72 0.0049
2015-01-30 2014-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -59,237 -100.00 0 -100.00
2014-11-06 2014-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 59,237 -11,589 -16.36 291 -33.56 0.0039
2014-08-08 2014-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 70,826 -28,272 -28.53 438 -17.36 0.0057
2014-05-07 2014-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 99,098 66,400 203.07 530 209.94 0.0066
2014-02-04 2013-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 32,698 -20,595 -38.64 171 -42.03 0.0025
2013-11-07 2013-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 53,293 15,523 41.10 295 210.53 0.0070
2013-07-25 2013-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 37,770 37,770 95 0.0019
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.