Robert I. Blum - 28 Sep 2026 Form 4 Insider Report for CYTOKINETICS INC (CYTK)

Reporting relationship: President & CEO, Director
Issuer ticker: CYTK
Reported as of: 28 Sep 2026
Net transaction value: -$490,950
SEC form: 4
Accepted by SEC: 28 Sep 2026, 16:54:52 UTC
Prior SEC filing: 15 Sep 2026
Source filing: View source filing
Reporting owner signature: /s/ John O. Faurescu, attorney-in-fact for Mr. Blum

Key filing fact

Robert I. Blum filed Form 4 for CYTOKINETICS INC (CYTK) on 28 Sep 2026.

Key facts

This page summarizes Robert I. Blum's Form 4 filing for CYTOKINETICS INC (CYTK).
3 reported transactions and 1 derivative row are listed below.
Accepted by SEC: 28 Sep 2026, 16:54.

Change

Previous filing in this sequence was filed on 15 Sep 2026.
Current net transaction value: -$490,950.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001288859 Primary reporting owner

Blum Robert I

Relationship: President & CEO, Director
Address: 350 OYSTER POINT BLVD, SOUTH SAN FRANCISCO
Signature: /s/ John O. Faurescu, attorney-in-fact for Mr. Blum
Signature date: 28 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CYTK transaction

Common Stock

Options Exercise

Transaction value
Shares: +7,500
Change %: +2.7%
Price: $10.60^*
Shares after: 286,044
Date: 28 Sep 2026
Ownership: Direct

CYTK transaction

Common Stock

Sale

Transaction value: $490,950
Shares: -7,500
Change %: -2.6%
Price: $65.46
Shares after: 278,544
Date: 28 Sep 2026
Ownership: Direct

CYTK holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,083
Date: 28 Sep 2026
Ownership: by Trust 1. Beneficial Ownership disclaimed.
Footnotes: F1

CYTK holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 2,083
Date: 28 Sep 2026
Ownership: by Trust 2. Beneficial Ownership Disclaimed.
Footnotes: F2

CYTK holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 0
Date: 28 Sep 2026
Ownership: by Trust 3. Beneficial Ownership Disclaimed.

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CYTK transaction Derivative

Non-Qualified Stock Option (Right to Buy)

Options Exercise

Transaction value
Shares: -7,500
Change %: -4.8%
Price: $0.000000^*
Shares after: 149,245
Date: 28 Sep 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 7,500
Exercise price: $10.60

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 2 footnotes

Footnote F1

Shares held by The Bridget Blum 2003 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the Shares.

Footnote F2

Shares held by The Brittany Blum 2003 Irrevocable Trust, of which reporting person is a co-trustee. Reporting person disclaims any beneficial ownership interest in the Shares.