Filer Snapshot

William D. Clark

CIK 0001355415. SEC filing timeline plus parsed ownership intelligence from 13F, 13D/G, and Forms 3/4/5 where available.

Entity type

Individual

Total filings

8

Latest filing

03 Jun 2022

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 GNCA. 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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No recent parsed 13D/G stake row for this CIK.

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Source: SEC Forms 3/4/5

4 filed on 03 Jun 2022 for CIK 0001355415.

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Ownership signals 1 signal
Ownership signals

SEC value by filing type

Compare filing types separately; 13F, 13D/G, and Forms 3/4/5 are different evidence sources.

Forms 3/4/5 positions$385.5K

Reporting-owner positions with enough data to estimate value.

Estimated Forms 3/4/5 position value

$385.5K

Estimated only when owner filings include enough share and price data.

Largest linked SEC positions

Largest issuer positions found across parsed 13F, 13D/G, and Forms 3/4/5 data.

GNCA IBIO
How to read these SEC values
  • Read each filing type on its own: 13F portfolios, 13D/G large stakes, and Forms 3/4/5 owner positions answer different questions.
  • Open the linked research paths when you need to verify the exact SEC filing behind a value.
Identity 1 identity field
Business address
C/O Genocea Biosciences, Inc., 100 Acorn Park Drive 5 Th Floor, Cambridge, MA, 02140

Filer intelligence

What SEC filings say about William D. Clark

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 GNCA worth $380.5K.

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

GNCA

02 Jun 2022 · President and CEO

$380.5K
Issuer page Owner page

IBIO

20 Nov 2025

$5K
Issuer page Owner page

ALDX

17 Apr 2025

Issuer page Owner page

Latest update

What changed recently for William D. Clark

Ownership report updated

Latest ownership report period: 20 Nov 2025. Open the source-backed page to inspect the fresh filing or facts context.

Update date

24 Nov 2025

Page type

Ownership filings

Latest period

20 Nov 2025

Ownership context was refreshed from SEC Forms 3/4/5 filed on 24 Nov 2025.

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SEC filing record

CIK 0001355415 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
8
First seen
25 Aug 2021
Latest filing
03 Jun 2022
Entity
Individual

Observed form types

3 4 5

CIK-linked evidence first

William D. Clark SEC filings William D. Clark owner filings Open SEC filing index

Latest Filings

Showing the latest 8 of 8 SEC filings for William D. Clark.

4

4 filing

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

4 filing

Filing date
02 Jun 2022
Reporting date
31 May 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
05 Apr 2022
Reporting date
04 Apr 2022
SEC evidence
Open document Open filing
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4

4 filing

Filing date
17 Mar 2022
Reporting date
15 Mar 2022
SEC evidence
Open document Open filing
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5

5 filing

Filing date
16 Mar 2022
Reporting date
31 Dec 2021
SEC evidence
Open document Open filing
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4

4 filing

Filing date
13 Dec 2021
Reporting date
09 Dec 2021
SEC evidence
Open document Open filing
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4

4 filing

Filing date
25 Aug 2021
Reporting date
23 Aug 2021
SEC evidence
Open document Open filing
Next action
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3

3 filing

Filing date
25 Aug 2021
Reporting date
23 Aug 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
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