캘리포니아주 퍼시픽 바이오사이언시스(Pacific Biosciences of California, Inc.)
MX ˙ BMV ˙ US69404D1081
SecurityMX:PACB / Pacific Biosciences of California, Inc.
InstitutionArrowMark Colorado Holdings LLC
Latest Disclosed Ownership468,382 shares
Latest Disclosed Value $ 618,264
ArrowMark Colorado Holdings LLC ownership in PACB / Pacific Biosciences of California, Inc.

On May 15, 2026 - ArrowMark Colorado Holdings LLC filed a 13F-HR form disclosing ownership of 468,382 shares of Pacific Biosciences of California, Inc. (MX:PACB) valued at $618,264 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 468,382 shares of Pacific Biosciences of California, Inc.. This represents a change in shares of 0.00% 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)
2026-05-15 2026-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 618 -29.37 0.0164
2026-02-17 2025-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 876 46.08 0.0193
2025-11-14 2025-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 600 3.28 0.0111
2025-08-14 2025-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 581 5.07 0.0105
2025-05-15 2025-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 553 -35.59 0.0090
2025-02-14 2024-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 857 7.66 0.0115
2024-11-14 2024-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 796 24.18 0.0102
2024-08-14 2024-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 0 0.00 642 -63.50 0.0077
2024-05-15 2024-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 468,382 235,196 100.86 1,756 -23.22 0.0197
2024-02-14 2023-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 233,186 0 0.00 2,288 17.46 0.0252
2023-11-14 2023-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 233,186 233,186 1,947 0.0237
2020-08-14 2020-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -2,816,791 -100.00 0 -100.00
2020-05-15 2020-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 2,816,791 -920,271 -24.63 8,619 -55.13 0.1132
2020-02-14 2019-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,737,062 273,897 7.91 19,208 7.49 0.1708
2019-11-14 2019-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,463,165 58,301 1.71 17,870 -13.25 0.1783
2019-08-14 2019-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,404,864 21,580 0.64 20,599 -15.79 0.1980
2019-05-15 2019-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,383,284 -79,008 -2.28 24,461 -4.53 0.2305
2019-02-14 2018-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,462,292 -297,194 -7.91 25,621 25.97 0.2690
2018-11-14 2018-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,759,486 -748,308 -16.60 20,339 27.09 0.1703
2018-08-14 2018-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 4,507,794 -258,618 -5.43 16,003 63.78 0.1469
2018-05-15 2018-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 4,766,412 868,102 22.27 9,771 -5.06 0.0976
2018-02-14 2017-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,898,310 795,699 25.65 10,292 -36.82 0.1042
2017-11-14 2017-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,102,611 -331,776 -9.66 16,289 33.23 0.1851
2017-08-14 2017-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 3,434,387 1,153,374 50.56 12,226 3.67 0.1514
2017-05-15 2017-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 2,281,013 809,459 55.01 11,793 110.89 0.1609
2017-02-14 2016-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 1,471,554 536,594 57.39 5,592 -33.25 0.0884
2016-11-14 2016-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 934,960 607,552 185.56 8,377 263.74 0.1523
2016-08-15 2016-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 327,408 104,486 46.87 2,303 21.53 0.0466
2016-05-16 2016-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 222,922 55,964 33.52 1,895 -13.55 0.0421
2016-02-16 2015-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 166,958 166,958 2,192 0.0599
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.