Pacific Biosciences of California, Inc.
MX ˙ BMV ˙ US69404D1081
SecurityMX:PACB / Pacific Biosciences of California, Inc.
InstitutionBalyasny Asset Management Llc
Latest Disclosed Ownership260,538 shares
Latest Disclosed Value $ 343,910
Balyasny Asset Management Llc ownership in PACB / Pacific Biosciences of California, Inc.

On May 15, 2026 - Balyasny Asset Management Llc filed a 13F-HR form disclosing ownership of 260,538 shares of Pacific Biosciences of California, Inc. (MX:PACB) valued at $343,910 USD as of March 31, 2026. The entity filed a previous 13F-HR on August 14, 2024 disclosing 0 shares of Pacific Biosciences of California, Inc..

Balyasny Asset Management Llc has a history of taking positions in derivatives of the underlying security (PACB) 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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.

MX:PACB / Pacific Biosciences of California, 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 PACIFIC BIOSCIENCES CALIF IN COM 69404D108 260,538 260,538 344 0.0004
2024-08-14 2024-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -288,612 -100.00 0 -100.00
2024-05-13 2024-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 288,612 288,612 1,082 0.0019
2024-02-14 2023-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -326,770 -100.00 0 -100.00
2023-11-14 2023-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 326,770 326,770 2,729 0.0056
2023-05-15 2023-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -349,391 -100.00 0 -100.00
2023-02-14 2022-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 349,391 349,391 2,858 0.0078
2022-05-16 2022-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -26,309 -100.00 0 -100.00
2022-02-14 2021-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 26,309 26,309 538 0.0018
2020-11-16 2020-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -19,029 -100.00 0 -100.00
2020-08-14 2020-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 19,029 19,029 66 0.0006
2020-02-14 2019-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -651,043 -100.00 0 -100.00
2019-11-14 2019-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 651,043 -38,237 -5.55 3,359 -19.45 0.0231
2019-08-14 2019-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 689,280 -749,776 -52.10 4,170 -59.92 0.0267
2019-05-15 2019-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 1,439,056 1,402,467 3,833.03 10,404 3,739.11 0.0692
2019-02-14 2018-12-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 36,589 -436,767 -92.27 271 -89.42 0.0020
2018-11-14 2018-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 473,356 473,356 1,193.71 2,561 845.02 0.0116
2018-08-14 2018-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 0 -19,958 -100.00 0 -100.00
2018-05-15 2018-03-31 13F PACIFIC BIOSCIENCES CALIF IN COM 69404D108 19,958 662 3.43 41 -19.61 0.0002
2018-02-14 2017-12-31 13F Pacific Biosciences of California Common Stock 69404D108 19,296 -14,204 -42.40 51 -71.02 0.0002
2017-11-14 2017-09-30 13F Pacific Biosciences of California Common Stock 69404D108 33,500 33,500 73.61 176 245.10 0.0007
2016-08-15 2016-06-30 13F Pacific Biosciences of California Common Stock 69404D108 0 -11,100 -100.00 0 -100.00
2016-05-16 2016-03-31 13F Pacific Biosciences of California Common Stock 69404D108 11,100 -244,556 -95.66 94 -97.20 0.0006
2016-02-16 2015-12-31 13F Pacific Biosciences of California Common Stock 69404D108 255,656 255,656 3,357 0.0233
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
(%)
2022-11-15 2022-09-30 13F PACIFIC BIOSCIENCES CALIF IN COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F PACIFIC BIOSCIENCES CALIF IN COM Call 25,000 111 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.