Entity type
Individual
Filer Snapshot
Russell C. Horowitz
CIK 0001054568. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.
Total filings
5
Latest filing
26 Jan 2023
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 MCHX. Each card links back to the PortfolioSavvy page where the filing evidence is closest.
Latest 13F portfolio
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No parsed 13F portfolio row yet.
Browse latest 13FLargest parsed holding
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Populates from the latest parsed 13F information table.
Open holding13D/G large stake
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No recent parsed 13D/G stake row for this CIK.
Browse 13D/GInsider / owner context
MCHX
16 Dec 2025
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Source: SEC Forms 3/4/5
View source filing
4 filed on 26 Jan 2023 for CIK 0001054568.
- Business address
- None, Seattle, WA, 98101
Filer intelligence
What SEC filings say about Russell C. Horowitz
A compact read of parsed XML filings. 13F, 13D/G, and Forms 3/4/5 are shown separately because they answer different ownership questions.
Quick read
- Forms 3/4/5 show insider context for MCHX.
SEC source mix
Counts show available parsed rows, not one combined ownership total.
Forms 3/4/5 insider context
MCHX
16 Dec 2025 · Chairman · 10% owner
Latest update
What changed recently for Russell C. Horowitz
Latest ownership report period: 16 Dec 2025. Open the source-backed page to inspect the fresh filing or facts context.
Update date
17 Dec 2025
Page type
Ownership filings
Latest period
16 Dec 2025
Ownership context was refreshed from SEC Forms 3/4/5 filed on 17 Dec 2025.
SEC filing record
CIK 0001054568 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
5
First seen
04 Oct 2021
Latest filing
26 Jan 2023
Entity
Individual
Observed form types
4
CIK-linked evidence first
Latest Filings
Showing the latest 5 of 5 SEC filings for Russell C. Horowitz.
4
4 filing
- Filing date
- 26 Jan 2023
- Reporting date
- 25 Jan 2023
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
4
4 filing
- Filing date
- 30 Dec 2022
- Reporting date
- 30 Dec 2022
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
4
4 filing
- Filing date
- 03 Oct 2022
- Reporting date
- 29 Sep 2022
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
4
4 filing
- Filing date
- 03 Jan 2022
- Reporting date
- 30 Dec 2021
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing
4
4 filing
- Filing date
- 04 Oct 2021
- Reporting date
- 01 Oct 2021
- SEC evidence
- Open document Open filing
- Next action
- Verify source filing