Karyopharm Therapeutics

KPTI on Nasdaq. Market value $15m.

Watch this stockFree. We tell you when something changes.

Should I look at this?

Look carefully before going further

Why it could be worth it

Nothing stands out yet.

Read the warning sign in its own filings

This is not advice.

Compare with another stock

Who owns it

None of the long-term investors we follow own it. 97 funds in all.

Jun '25
Dec '25
Jun '26
Largest holders overall

From 13F filings for the quarter ended 30 June 2026.

Big holders and activists

11 investors own more than 5%.

  • at least 9.9%0.0 pts
    (filed with 3 related holders)
    Since 30 June 2026
  • at least 8.6%0.0 pts
    (filed with 1 related holder)
    Since 31 March 2026
  • Affinity Healthcare Fund, LP
    Passive investor
    7.8%
    Since 3 April 2025
  • Adage Capital Management, L.P.
    Passive investor
    at least 6.8%−1.3 pts
    (filed with 2 related holders)
    Since 30 June 2026
  • 6.6%−5.2 pts
    Since 31 May 2026
  • at least 6.3%+1.2 pts
    (filed with 1 related holder)
    Since 30 June 2026
  • Anders Hove
    Passive investor
    at least 5.7%0.0 pts
    (filed with 4 related holders)
    Since 22 September 2026
  • Integrated Core Strategies (US) LLC
    Passive investor
    at least 5.7%+3.4 pts
    (filed with 3 related holders)
    Since 31 August 2026
  • BlackRock, Inc.
    Passive investor
    5.6%
    Since 30 June 2026
  • J. Wood Capital Advisors LLC
    Passive investor
    at least 5.0%
    (filed with 1 related holder)
    Since 14 October 2025
  • Opaleye Management Inc.
    Passive investor
    at least 2.7%−6.8 pts
    (filed with 2 related holders)
    Since 31 March 2026
  • Sold down below 5%
    Since 30 September 2025
  • JPMORGAN CHASE & CO.
    Passive investor
    Sold down below 5%
    Since 30 September 2025
  • The Vanguard Group
    Passive investor
    Sold down below 5%
    Since 30 September 2025
  • Commodore Capital LP
    Passive investor
    Sold down below 5%
    Since 30 June 2026
  • Ikarian Capital, LLC
    Passive investor
    Sold down below 5%
    Since 31 March 2026

From Schedule 13D and 13G filings: anyone owning more than 5% must file one.

What insiders did

No insider bought shares on the open market in the last 12 months. 7 sold $349,774.

  • Abate Kristin
    Chief Accounting Officer
    Sold
    Date
    1 October 2026
    Shares
    378
    Price
    $1.19
    Value
    $450
  • Abate Kristin
    Chief Accounting Officer
    Sold
    Date
    1 September 2026
    Shares
    19
    Price
    $2.02
    Value
    $38
  • Poulton Stuart
    EVP, Chief Development Officer
    Sold
    Date
    28 July 2026
    Shares
    189
    Price
    $7.10
    Value
    $1,342
  • Poulton Stuart
    EVP, Chief Development Officer
    Sold
    Date
    14 May 2026
    Shares
    403
    Price
    $9.50
    Value
    $3,829
  • Rangwala Reshma
    EVP & Chief Medical Officer
    Sold
    Date
    14 May 2026
    Shares
    408
    Price
    $9.50
    Value
    $3,876
  • Cheng Sohanya Roshan
    EVP & Chief Commercial Officer
    Sold
    Date
    14 May 2026
    Shares
    324
    Price
    $9.50
    Value
    $3,078
  • Abate Kristin
    Chief Accounting Officer
    Sold
    Date
    14 May 2026
    Shares
    53
    Price
    $9.50
    Value
    $504
  • Paulson Richard A.
    President and CEO, Director
    Sold
    Date
    14 May 2026
    Shares
    2,203
    Price
    $9.50
    Value
    $20,929
  • Mano Michael
    EVP, CLO&Secretary
    Sold
    Date
    14 May 2026
    Shares
    266
    Price
    $9.50
    Value
    $2,527
  • Rangwala Reshma
    EVP & Chief Medical Officer
    Sold
    Date
    21 April 2026
    Shares
    449
    Price
    $8.94
    Value
    $4,014

From Form 4 filings: insiders must report trades in their own company's shares within two days.

Warning signs in its filings

Problems the company itself reported to the SEC, in its own words.

1 serious warning sign in Karyopharm Therapeutics’ filings.

We look for five warning signs: doubt it can keep going, weak checks on its own accounts, a notice that its past accounts can't be relied on, a change of auditor, and one customer bringing in a big share of sales. We don't check lawsuits, investigations or debt yet.

We checked the auditor's report, internal controls, restatement notices, auditor changes and big customers in the 10-K filed 13 Feb 2026, plus the 10-Q filed 13 Aug 2026 and 12 later 8-Ks.

  • Doubt it can keep going

    Serious

    The company or its auditor warned it may not have enough money to last the next year.

    “Based on our current business plan and current capital resources, combined with the uncertainty regarding the availability of additional funding or other strategic alternatives and considering our debt service obligations and financial covenant to maintain minimum liquidity, we have concluded that there is substantial doubt regarding our ability to continue as a going concern within one year after the date the accompanying condensed consolidated financial statements are issued.”
    Show the full paragraph
    We have historically financed our operations primarily through a combination of proceeds from (i) product revenue sales; (ii) public and private placements of equity securities; (iii) the issuance of convertible debt; (iv) a term loan; (v) our deferred royalty obligation; (vi) at the market offerings; and (vii) business development activities. As of June 30, 2026, we had $ 65.1 million of cash, cash equivalents, and investments and an accumulated deficit of $ 1.8 billion. We have incurred significant operating losses since our inception and we anticipate that we will continue to incur significant operating losses to support our continued operations and maintain our research and development programs, including as we continue to develop and seek regulatory approval of selinexor for myelofibrosis. As a result, our continued operations are dependent on our ability to raise additional funding or enter into other strategic alternatives and marketing XPOVIO in its currently approved indications. Based on our current business plan and current capital resources, combined with the uncertainty regarding the availability of additional funding or other strategic alternatives and considering our debt service obligations and financial covenant to maintain minimum liquidity, we have concluded that there is substantial doubt regarding our ability to continue as a going concern within one year after the date the accompanying condensed consolidated financial statements are issued.

    From the 10-Q filed 13 August 2026, Part I, Item 1. Financial Statements. Read it in the filing

A 10-K is the yearly report every US company files with the SEC. An 8-K is a short notice of a big event.

The deep dive

Everything above is arithmetic on public filings. The deep dive reads the last ten years of annual reports, the proxy statements, and the earnings calls, then argues the case the way Buffett, Klarman, and Hohn would, and checks every claim against the source.

  • What the business is worth, as a range, and the margin of safety at today’s price
  • Prices to start buying, buy, and buy hard
  • The three things that would make this a mistake
  • Every number footnoted to the filing it came from
Create a free account to run it

Your first deep dive is free.

What a finished deep dive looks like

Not advice. Numbers on this page come from SEC filings and are updated each night; prices are updated again after the US market closes. The five-year figures are rounded.