Cytokinetics Inc (CYTK) insider trading
Recent insider transactions reported to the SEC on Form 4 — directors and officers buying or selling their own company’s stock. Sourced directly from public SEC filings, latest filed Oct 13, 2026.
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- Filings shown
- 24
- Open-market buys
- 0
- Open-market sells
- 20
Counts cover the 24 most recent Form 4 filings Tradune holds for CYTK (filed Jul 7 – Oct 13, 2026); the score below covers only the trailing 90 days (0 buys, 16 sells). No completed check of CYTK's Form 4 list on SEC EDGAR is on record yet; the latest CYTK filing Tradune holds was filed Oct 13, 2026. This is not guaranteed to be the complete record — see CYTK's full Form 4 filing history on SEC EDGAR.
Open-market activity, last 90 days
Purchases (Form 4 code P) and sales (code S) on the 16 filings Tradune holds for CYTK filed Jul 23 – Oct 13, 2026. Grants, exercises, tax withholding and the other Form 4 transaction codes are left out.
17 open-market sales by Rule 10b5-1 checkbox
- On filings with the 10b5-1 box checked
- 17 sales· 191,426 sh
- checkbox disclosed
- On filings with the box not checked
- 0 sales· 0 sh
- not proof that no plan exists
- Not comparable
- 0 sales· 0 sh
- filed before Apr 1, 2023, or no checkbox value in the filing data
Counts are Form 4 lines as filed. The checkbox is one per filing, so every sale on a filing with the box checked is counted there even if only some of its transactions were under a plan; it records what the filer disclosed, and the three categories are not a judgement about why a sale was made.
| Insider | Buys | Sells | Shares bought | Shares sold | Value |
|---|---|---|---|---|---|
| Robert I. BlumPresident & CEO | 0 | 7 | — | 142,926 | −$10,011,585 |
| Fady Ibraham MalikEVP Research & Development | 0 | 5 | — | 17,500 | −$1,265,390 |
| Andrew CallosEVP, Chief Commercial Officer | 0 | 2 | — | 24,000 | −$1,820,720 |
| Robert E. LandryDirector | 0 | 2 | — | 2,000 | −$146,790 |
| B. Lynne ParshallDirector | 0 | 1 | — | 5,000 | −$357,400 |
Value = shares × the price reported on each Form 4 (+ purchases, − sales); every open-market line in this window disclosed a price.
Summarises ~90 days of public SEC Form 4 activity — more distinct buyers, officer involvement and net buying score higher. A description of filing activity, not a rating or buy signal. How this score is computed →
How to read this: an open-market purchase (Form 4 code P) is a buy at the market price with the insider’s own money, as opposed to a grant, award or option exercise; an open-market sale is code S. When two or more distinct insiders report open-market purchases in the same 90-day window, this site labels that a cluster — a definition, not a forecast; see insider cluster buying. “Held after” is Form 4 Table I column 5; “Change” = shares ÷ holdings before the trade (held after − shares for an acquisition, held after + shares for a disposition).
Insider Buying at CYTK
No open-market insider purchases (Form 4 code P) were reported for CYTK between Jul 7, 2026 and Oct 13, 2026. The filings below may include other transaction types — sales, grants, option exercises, and tax withholding — shown for completeness; they are not open-market purchases.
Recent Form 4 filings
Source: SEC EDGAR Form 4 · transaction codes explained
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 7,500 | $10.60 | 286,044 | +2.7% | Oct 12, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,500 | — | — | — | Oct 12, 2026 |
| Open-market sale 10b5-1 box checked | 7,500 | $62.88 | 278,544 | −2.6% | Oct 12, 2026 |
† change in this filer’s own reported holding line (Form 4 Table I, col. 5), not of total company ownership; small prior holdings produce large percentages, so under 100 shares the prior holding is shown instead.
“10b5-1 box checked” = the filer checked the Form 4 box stating that a transaction on the filing was made under a plan intended to satisfy Rule 10b5-1(c); “10b5-1 box not checked” = the box was left blank, which does not prove that no plan exists. The box applies to Form 4s filed from April 1, 2023; older filings, and boxes we could not read, carry no tag. What the 10b5-1 box means.
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,500 | $61.38 | 153,902 | −2.2% | Oct 6, 2026 |
| Option exercise | 3,500 | $7.80 | 157,402 | +2.3% | Oct 6, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 3,500 | — | — | — | Oct 6, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,500 | — | — | — | Sep 28, 2026 |
| Option exercise | 7,500 | $10.60 | 286,044 | +2.7% | Sep 28, 2026 |
| Open-market sale 10b5-1 box checked | 7,500 | $65.46 | 278,544 | −2.6% | Sep 28, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Non-Qualified Stock Option (Right to Buy) | 3,500 | — | — | — | Sep 22, 2026 |
| Option exercise | 3,500 | $7.80 | 157,402 | +2.3% | Sep 22, 2026 |
| Open-market sale 10b5-1 box checked | 3,500 | $68.29 | 153,902 | −2.2% | Sep 22, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,000 | $72.13 | 8,184 | −11% | Sep 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 97,926 | $69.33 | 0 (indirect) | −100% | Sep 15, 2026 |
| Gift | 1,350 | — | 376,470 | −0.4% | Sep 14, 2026 |
| Gift | 97,926 | — | 278,544 | −26% | Sep 14, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,500 | — | — | — | Sep 14, 2026 |
| Open-market sale 10b5-1 box checked | 7,500 | $73.44 | 377,820 | −1.9% | Sep 14, 2026 |
| Option exercise | 7,500 | $10.60 | 385,320 | +2.0% | Sep 14, 2026 |
| Gift | 97,926 | — | 97,926 (indirect) | — | Sep 14, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 1,000 | $74.66 | 9,184 | −9.8% | Sep 11, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,500 | $75.46 | 153,902 | −2.2% | Sep 8, 2026 |
| Option exercise | 3,500 | $7.80 | 157,402 | +2.3% | Sep 8, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 3,500 | — | — | — | Sep 8, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 5,000 | $71.48 | 10,784 | −32% | Sep 1, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 10,000 | $23.26 | 68,555 | +17% | Aug 31, 2026 |
| Open-market sale 10b5-1 box checked | 10,000 | $70.24 | 58,555 | −15% | Aug 31, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 10,000 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 7,500 | $70.24 | 377,820 | −1.9% | Aug 31, 2026 |
| Option exercise | 7,500 | $10.60 | 385,320 | +2.0% | Aug 31, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,500 | — | — | — | Aug 31, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 3,500 | $7.80 | 157,402 | +2.3% | Aug 18, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 3,500 | — | — | — | Aug 18, 2026 |
| Open-market sale 10b5-1 box checked | 3,500 | $75.82 | 153,902 | −2.2% | Aug 18, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 7,500 | $76.76 | 377,820 | −1.9% | Aug 10, 2026 |
| Option exercise | 7,500 | $10.60 | 385,320 | +2.0% | Aug 10, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,500 | — | — | — | Aug 10, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise | 14,000 | $23.26 | 72,555 | +24% | Jul 30, 2026 |
| Open-market sale 10b5-1 box checked | 14,000 | $79.88 | 58,555 | −19% | Jul 30, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 14,000 | — | — | — | Jul 30, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,500 | — | — | — | Jul 27, 2026 |
| Option exercise | 7,500 | $10.60 | 385,320 | +2.0% | Jul 27, 2026 |
| Open-market sale 10b5-1 box checked | 7,500 | $80.87 | 377,820 | −1.9% | Jul 27, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 3,500 | $80.59 | 153,902 | −2.2% | Jul 21, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 3,500 | — | — | — | Jul 21, 2026 |
| Option exercise | 3,500 | $7.80 | 157,402 | +2.3% | Jul 21, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 75 | $82.62 | 33,992 | +0.2% | Jul 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 75 | $82.62 | 35,563 | +0.2% | Jul 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 151 | $82.62 | 10,434 | +1.5% | Jul 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 272 | $82.62 | 78,360 | +0.3% | Jul 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 151 | $82.62 | 21,932 | +0.7% | Jul 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Grant / award | 151 | $82.62 | 3,390 | +4.7% | Jul 15, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Open-market sale 10b5-1 box checked | 10 | $82.02 | 377,820 | −0.0% | Jul 13, 2026 |
| Option exercise | 7,490 | $10.60 | 385,310 | +2.0% | Jul 13, 2026 |
| Open-market sale 10b5-1 box checked | 7,490 | $82.02 | 377,820 | −1.9% | Jul 13, 2026 |
| Option exercise Non-Qualified Stock Option (Right to Buy) | 7,490 | — | — | — | Jul 13, 2026 |
| Transaction | Shares | Price | Held after | Change† | Date |
|---|---|---|---|---|---|
| Option exercise Non-Qualified Stock Option (Right to Buy) | 3,500 | — | — | — | Jul 7, 2026 |
| Open-market sale 10b5-1 box checked | 3,500 | $86.62 | 153,902 | −2.2% | Jul 7, 2026 |
| Option exercise | 3,500 | $7.80 | 157,402 | +2.3% | Jul 7, 2026 |
Insider filings reported around the same time
Other companies whose most recent Form 4 was filed closest to CYTK's (Oct 13, 2026).
Frequently asked about CYTK insider activity
How many insiders bought CYTK stock in these Form 4 filings?
No open-market purchases (Form 4 code P) of CYTK shares were reported by Cytokinetics Inc insiders between Jul 7, 2026 and Oct 13, 2026. The 24 filings shown on this page cover other transaction types — sales, grants, option exercises, and tax withholding.
Who filed the most recent Form 4 for CYTK?
The most recent Form 4 on this page was filed by Robert I. Blum (President & CEO) on Oct 13, 2026, reporting 3 transactions. The original document is linked from the filing list above on SEC EDGAR. Amended filings (Form 4/A) may later revise reported figures.
What was the largest open-market CYTK insider sale shown?
The largest open-market sale among the filings shown was 97,926 CYTK shares at $69.33 (about $6,789,210) by Robert I. Blum (President & CEO) on Sep 15, 2026. Value is shares × the price reported on the Form 4; that Form 4 has the Rule 10b5-1 box checked.
New to Form 4s? The transaction codes, the 90-day window and the 0–100 score are defined on the insider-activity score methodology page.
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Track CYTK insider filings free →This score summarizes SEC Form 4 filing activity over the trailing 90 days. It is descriptive, not predictive — not a rating, recommendation, or investment advice. Data: SEC EDGAR (public domain), as filed; amendments may revise figures. Tradune is not a registered investment adviser.
Data as filed; amended filings (Form 4/A) may revise figures. Sales may occur under prearranged Rule 10b5-1 trading plans.