Filer Snapshot

Robert Arthur Harrington

CIK 0001923988. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity Type

Individual

Total Filings

30

Latest Filing

27 May 2026

Industry

n/a

Filing-backed research brief

Start with the SEC data that changes for this CIK

Latest signal: Forms 3/4/5 owner position for CYTK. Each card links back to the PortfolioSavvy page where the filing evidence is closest.

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Largest parsed holding

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Populates from the latest parsed 13F information table.

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13D/G large stake

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Source: SEC Forms 3/4/5

4 filed on 27 May 2026 for CIK 0001923988.

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Identity
Business address
C/O Cytokinetics, Incorporated, 350 Oyster Point Blvd., South San Francisco, CA, 94080
SEC ownership signals
Filing-backed coverage

Insider holdings value

$1.44M

Parsed Forms 3/4/5 holdings where value can be estimated.

Top ownership positions
CYTK

Filer intelligence

What SEC filings say about Robert Arthur Harrington

A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.

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Quick read

  • Forms 3/4/5 show insider context for CYTK worth $1.44M.

SEC source mix

Counts show available parsed rows, not one combined ownership total.

XML parsed
13F portfolio No rows yet

Quarterly institutional portfolio holdings.

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13D/G stakes No rows yet

Beneficial ownership and large-stake disclosures.

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Forms 3/4/5 1 rows

Officer, director, and 10% owner holdings or transactions.

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Forms 3/4/5 insider context

CYTK

27 May 2026

$1.44M
Issuer page Owner page

Latest update

What changed recently for Robert Arthur Harrington

Ownership report updated

Latest ownership report period: 27 May 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

27 May 2026

Page type

Ownership filings

Latest period

27 May 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 27 May 2026.

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SEC filing record

CIK 0001923988 filing coverage

Start with this filing record, then use the linked ownership pages when parsed 13F, 13D/G, Forms 3/4/5, or facts data exists for this CIK.

SEC filings
30
First seen
18 Apr 2022
Latest filing
27 May 2026
Entity
Individual

Observed form types

4 144 3

Primary evidence

Open SEC filing index Robert Arthur Harrington SEC filings Robert Arthur Harrington owner filings

Latest Filings

Showing the latest 12 of 30 SEC filings for Robert Arthur Harrington.

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4 File 000-50633

PRIMARY DOCUMENT

Filing date
27 May 2026
Reporting date
27 May 2026
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
15 Apr 2026
Reporting date
15 Apr 2026
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
16 Jan 2026
Reporting date
15 Jan 2026
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
02 Dec 2025
Reporting date
01 Dec 2025
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
16 Oct 2025
Reporting date
15 Oct 2025
SEC evidence
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144

144 filing

Filing date
02 Sep 2025
Reporting date
Not listed
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
02 Sep 2025
Reporting date
02 Sep 2025
SEC evidence
Open document Open filing
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
16 Jul 2025
Reporting date
15 Jul 2025
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
19 May 2025
Reporting date
14 May 2025
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
16 Apr 2025
Reporting date
15 Apr 2025
SEC evidence
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4 File 000-50633

PRIMARY DOCUMENT

Filing date
04 Apr 2025
Reporting date
03 Apr 2025
SEC evidence
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144

144 filing

Filing date
04 Mar 2025
Reporting date
Not listed
SEC evidence
Open document Open filing
Next action
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