Filer Snapshot

Rex S. Jackson

CIK 0001249803. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Individual

Total filings

22

Latest filing

25 Sep 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 CHPT. 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 25 Sep 2023 for CIK 0001249803.

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Ownership signals CIK-linked ownership evidence from parsed SEC filings. 1 signal
Parsed SEC ownership signals

Parsed SEC ownership coverage

These bars compare filing-backed value available in each disclosure family. Read them as separate lenses, not as one combined ownership total.

Forms 3/4/5 positions$1.65M

Reporting-owner positions with enough filing detail to estimate value.

Forms 3/4/5 position value

3/4/5
$1.65M

Estimated from parsed Forms 3/4/5 when filings include enough share and price data.

Largest linked holdings

Largest issuer positions linked to this CIK across parsed 13F, 13D/G, and Forms 3/4/5 records.

CHPT
How to read these SEC ownership signals
  • Read each filing family separately: 13F portfolios, 13D/G large stakes, and Forms 3/4/5 owner positions answer different SEC disclosure questions.
  • Open the linked research path when you need the filing, CIK, issuer, or CUSIP trail behind a value.
At a glance Names, identifiers, and filing context for this profile. 1 identity field
Business address
C/O Symyx Technologies, Inc., 3100 Central Expressway, Santa Clara, CA, 95051

Filer intelligence

What SEC filings say about Rex S. Jackson

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 CHPT worth $1.65M.

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 3 rows

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

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Forms 3/4/5 insider context

CHPT

21 Sep 2023 · Chief Financial Officer

$1.65M
Issuer page Owner page

NKLR

09 Oct 2025

Issuer page Owner page

EMKR

09 Apr 2024

Issuer page Owner page

Latest update

What changed recently for Rex S. Jackson

Ownership report updated

Latest ownership report period: 09 Oct 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

10 Oct 2025

Page type

Ownership filings

Latest period

09 Oct 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 10 Oct 2025.

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SEC filing record

CIK 0001249803 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
22
First seen
04 Jun 2021
Latest filing
25 Sep 2023
Entity
Individual

Observed form types

4 4/A

CIK-linked evidence first

Rex S. Jackson SEC filings Rex S. Jackson owner filings Open SEC filing index

Latest Filings

Showing the latest 12 of 22 SEC filings for Rex S. Jackson.

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4

4 filing

Filing date
25 Sep 2023
Reporting date
21 Sep 2023
SEC evidence
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4

4 filing

Filing date
23 Jun 2023
Reporting date
21 Jun 2023
SEC evidence
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4

4 filing

Filing date
23 Mar 2023
Reporting date
21 Mar 2023
SEC evidence
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4

4 filing

Filing date
22 Mar 2023
Reporting date
21 Mar 2023
SEC evidence
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4

4 filing

Filing date
13 Mar 2023
Reporting date
09 Mar 2023
SEC evidence
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4

4 filing

Filing date
23 Dec 2022
Reporting date
21 Dec 2022
SEC evidence
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4/A

4/A filing

Filing date
14 Nov 2022
Reporting date
10 Nov 2022
SEC evidence
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4

4 filing

Filing date
23 Sep 2022
Reporting date
21 Sep 2022
SEC evidence
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4

4 filing

Filing date
13 Sep 2022
Reporting date
09 Sep 2022
SEC evidence
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4

4 filing

Filing date
24 Jun 2022
Reporting date
22 Jun 2022
SEC evidence
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4

4 filing

Filing date
03 Jun 2022
Reporting date
01 Jun 2022
SEC evidence
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4

4 filing

Filing date
19 May 2022
Reporting date
17 May 2022
SEC evidence
Open document Open filing
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