KPTIKaryopharm Therapeutics Inc.

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Market reactionShares fell 83% on Nov 2.

ChallengedLast material event Sep 11, 2026 · Updated Oct 25, 2026

Karyopharm's lenders extended their forbearance to November 1 while FDA decides whether to accept its sNDA for selinexor plus ruxolitinib in myelofibrosis; the company has warned it may not continue as a going concern

Karyopharm sells XPOVIO (selinexor), an oral cancer drug approved for multiple myeloma and a type of lymphoma, and has asked FDA to approve it with ruxolitinib for myelofibrosis.

Karyopharm wants to add myelofibrosis to XPOVIO (selinexor), its approved oral XPO1 inhibitor; Phase 3 SENTRY met its spleen co-primary endpoint but not the symptom endpoint. FDA said in writing that SVR35 is a reasonably likely surrogate for accelerated approval, and whether it accepts the August 31 sNDA is the next step. The company is in financial distress, operating under a lender forbearance extended to November 1 that a refusal to file, or liquidity below $10 million, would end.

Thesis checklist

1 risk needs attention

Select a row for evidence
FDA accepts the myelofibrosis sNDAAwaiting evidenceNext: FDA filing decision (fourth quarter of 2026).

Why it is in this state

The evidence, what would weaken it and the source filing

A financing or restructuring keeps the company operatingAt riskNext: Forbearance end date (November 1, 2026) or a transaction.

Why it is in this state

The evidence, what would weaken it and the source filing

XPOVIO revenue holdsSupportedNext: Q3 revenue.

Why it is in this state

The evidence, what would weaken it and the source filing

XPORT-MM-031 supports a new myeloma regimenAwaiting evidenceNext: Topline data (second half of 2026).

Why it is in this state

The evidence, what would weaken it and the source filing

Next decision point

FDA filing decision on the myelofibrosis sNDA

Tests: FDA accepts the myelofibrosis sNDA

Fourth quarter of 2026

Does FDA accept the sNDA for review, and with Priority Review?

Strong, inconclusive and weak outcomes

What to look for in the result and how each would move the checklist

Questions to investigate

History

Price and material events

Select an event marker to read the update below. Marker colors show Thesis status.

ChallengedCurrentFinancial
-0.6%Sep 11, 2026

Karyopharm's lenders extended their forbearance to November 1 while FDA decides whether to accept its sNDA for selinexor plus ruxolitinib in myelofibrosis; the company has warned it may not continue as a going concern

ChallengedRegulatory
-10.2%Aug 31, 2026

sNDA filed for selinexor plus ruxolitinib in myelofibrosis, but runway expires before FDA rules

ChallengedClinical
-72.6%Jul 30, 2026

Approved XPO1 inhibitor files for myelofibrosis on one co-primary met, one missed, with runway expiring at filing — approval path and survival both unresolved

ChallengedClinical
-13.8%May 14, 2026

SENTRY split readout — one co-primary met, one missed — leaves selinexor's myelofibrosis filing viable but approvability genuinely unresolved before cash runs out in Q3 2026

About this history: every entry shows when the Thesis moved and what it said. The reasoning behind each move (the evidence, the analysis and the source filing) and the earnings write-ups are part of a subscription.

Pipeline

Myelofibrosis
selinexor · 4 upcoming · 2 completed
Compendia listing of with ruxolitinib
H2 2026
sNDA Acceptance
Q4 2026
Regulatory Decision
TBD
Confirmatory Phase 3 Data: Long-termSENTRY
TBD
Multiple myeloma· anti-CD38 pre-treated
selinexor · 1 upcoming
Phase 3 Data: ToplineXPORT-MM-031
H1 2026H2 2026
Myelofibrosis· JAKi-naïve, moderate thrombocytopenia
selinexor · 1 upcoming
Phase 2 Data: ToplineSENTRY-2
H2 2026
Corporate
1 upcoming · 1 completed
Shareholder Consent Deadline for Preferred Stock Conversion Share Issuance
Mar 15, 2027
N/A
Corporate · 1 upcoming
Court approval of DIP financing and bidding procedures
TBD
Endometrial cancer· advanced or recurrent, TP53 wild-type
selinexor · 1 completed
Phase 3 Data: ToplineXPORT-EC-042
Jul 30, 2026
Myelofibrosis· JAKi-naïve
selinexor · 2 completed
Phase 3 Data: ToplineSENTRY
Reported Mar 24, 2026
Phase 3 Enrollment: CompletionSENTRY
Reported Aug 11, 2025

Dates, trials and completed outcomes are open to everyone. What each upcoming milestone hinges on is part of a subscription.

Quick answers

Is the Karyopharm Therapeutics (KPTI) investment thesis intact?
It is under pressure. Readouts currently rates the Karyopharm Therapeutics Thesis Challenged. Karyopharm's lenders extended their forbearance to November 1 while FDA decides whether to accept its sNDA for selinexor plus ruxolitinib in myelofibrosis; the company has warned it may not continue as a going concern.
What is the next catalyst for Karyopharm Therapeutics (KPTI)?
The next dated event is sNDA acceptance decision for Selinexor, expected Q4 2026, as stated by the company. Also ahead: Phase 3 topline results (XPORT-MM-031) for Selinexor, expected H2 2026.

Competitive landscape

11 peers tracked

For informational purposes only—not investment advice. Always conduct your own research before making investment decisions.

Financial snapshot

Dates and calculation details

Cash: Market-data provider estimate; measurement period unavailable.

Debt: Market-data provider estimate; a complete comparable filing balance is unavailable.

Quarterly burn: Estimated from trailing free cash flow; measurement period unavailable.

Net cash and estimated runway require verified matching measurement periods. Missing debt components are not assumed to be zero.

Runway: No underlying guidance available.