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PACB

Pacific Biosciences of California, Inc.

Nasdaq · usd

$2.25+0.14 (+6.63%)
At close · 15-minute delayed
$2.22-0.03 (-1.27%)
As of 4:13:04 PM EDT on Oct 26, 2026 · After hours

Pacific Biosciences of California, Inc. (PACB) trades at $2.25 (+6.63%) as of 4:13:04 PM EDT on Oct 26, 2026, +38.89% over the past month. Market cap is $655.85M, with 3.0 days to cover in short interest.

Stock performance

How Pacific Biosciences of California, Inc. (PACB) stock has performed from one day to one year, with its 52-week range.

+5.78%
+$0.12 over 1D
$2.10$2.16$2.22$2.284:00 AM9:20 AM11:35 AM1:55 PM4:10 PM$2.22
1D
+6.64%
1W
+22.28%
1M
+38.89%
YTD
+20.32%
1Y
+7.66%
52-wk range
$1.07 – $3.44

Key statistics

Today's trading snapshot for PACB: day range, open, previous close, volume and market cap.

Day range
$2.08 – $2.31
Open
$2.12
Prev close
$2.11
Volume
9.56M
Market cap
$655.85M
Shares out
310.83M

Valuation and profitability ratios: P/E, P/S, ROE

Valuation and profitability ratios for Pacific Biosciences of California, Inc.: P/E, P/S, P/B, ROE and more.

P/E
—
P/S
4.12
P/B
-19.75
P/FCF
—
ROE
395.6%
ROA
-17.5%
Debt/Equity
-19.40
Div yield
0.00%

As of Oct 23, 2026

8-K filings

Material corporate events Pacific Biosciences of California, Inc. has disclosed to the SEC on Form 8-K.

  • Ceo appointmentAug 5, 2026

    On July 30, 2026, the Board appointed Mark Van Oene, age 54, as the Company's President and Chief Executive Officer and as a member of the Board, effective August 5, 2026 (the "Effective Date"). In connection with his appointment as Chief Executive Officer, the Company and Mr. Van Oene entered into an employment agreement (the "Employment Agreement"). The terms of the Employment Agreement provide that Mr. Van Oene will receive an annual base salary of $743,000, effective August 16, 2026.

  • Director departureJul 9, 2026

    On July 8, 2026, Christopher M. Smith, a member of the board of directors (the "Board") of Pacific Biosciences of California, Inc. (the "Company"), notified the Company of his resignation from the Board, effective immediately.

  • Equity compensation grantJun 4, 2026

    the board of directors (the "Board") of Pacific Biosciences of California, Inc. (the "Company"), at the recommendation of the compensation committee of the Board, approved an amendment (the "Amendment") to the Company's 2020 Equity Incentive Plan (the "2020 Plan"), subject to stockholder approval, to reserve an additional 16,000,000 shares of the Company's common stock (the "Additional Shares") for issuance pursuant to the 2020 Plan.

  • On March 2, 2026, Michele Farmer notified Pacific Biosciences of California, Inc. (the "Company") that she is voluntarily resigning as Chief Accounting Officer of the Company effective on March 21, 2026, to pursue another opportunity. Ms. Farmer's departure is not in connection with any known disagreement with the Company on any matter relating to its operations, policies, or practices.

  • Director appointmentMar 5, 2026

    the Board of Directors (the "Board") of Pacific Biosciences of California, Inc. (the "Company"), upon the recommendation of its Corporate Governance and Nominating Committee, increased the size of the Board to ten directors and appointed Christopher Gibson, Ph.D. to serve as a Class I director effective as of the Effective Date, with an initial term expiring at the Company's 2026 annual meeting of stockholders. As of the Effective Date, the Board also appointed Dr. Gibson as a member of the Company's Science and Technology Committee.

PACB short interest

How heavily PACB is shorted: shares short, days to cover and average daily volume.

Days to cover
3.0
Short interest
47.22M
Avg volume
15.91M

As of · reported to FINRA twice monthly.

PACB news

The latest news and headlines about Pacific Biosciences of California, Inc. (PACB).

Frequently asked questions

What is the Pacific Biosciences of California, Inc. (PACB) stock price today?

Pacific Biosciences of California, Inc. (PACB) is trading at $2.25 (+6.63% on the day) as of 4:13:04 PM EDT on Oct 26, 2026. Prices are delayed at least 15 minutes; real-time quotes are available from the Massive API.

What is Pacific Biosciences of California, Inc.?

Pacific Biosciences of California Inc is a biotechnology company focused on designing, developing, and manufacturing sequencing solutions that enable scientists and clinical researchers to improve their understanding of the genome and ultimately, resolve genetically complex…

What is the short interest in PACB?

As of Sep 30, 2026, PACB has 47.22M shares short and 3.0 days to cover.

What exchange is PACB listed on?

Pacific Biosciences of California, Inc. (PACB) trades on Nasdaq in USD, in the LABORATORY ANALYTICAL INSTRUMENTS industry.

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