Filer Snapshot

Barbara Kosacz SEC EDGAR Filings

SEC filings, ownership reports, and insider transactions for CIK 0001763316.

Entity Type

Individual

Total Filings

29

Latest Filing

13 Apr 2026

Industry

n/a

Save this filer page for the next filing cycle

Keep this page in your research queue, then return to compare new filings with prior context.

Save and revisit

Save this filer page

Create a free account to keep this page in your watchlists. After verification, we will save it automatically and open your saved research list.

Create free account and save this filer Already have an account? Sign in and save it

Best next steps

Start with the latest filings table, then open the strongest context page for this filer.

  • Use the filings table to verify the newest submission, form type, and report period.
  • Open the deeper context page only when this filer actually has insider or ownership signal.
Go to latest filings table Open reporting owner context
Source: SEC Forms 3/4/5

4 filed on 13 Apr 2026 for CIK 0001763316.

View Source Filing
Business address
2200 Powell Street, Suite 310, Emeryville, CA, 94608
Top holdings (ownership)
KRON, XOMA, and CERO

Key facts

  • Barbara Kosacz is an SEC filer tracked under CIK 0001763316.
  • 29 filings are listed on this profile.
  • Common form coverage includes 4, 3.

Change

  • Latest filing: 4 filed on 13 Apr 2026.
  • Report period: 09 Apr 2026.

Research use

  • You can quote filing dates and form types directly from the SEC record on this page.
  • Use this profile before deeper ownership or insider analysis to confirm filing history context.

Evidence

Source: SEC Forms 3/4/5

4 filed on 13 Apr 2026 for CIK 0001763316.

View Source Filing

Return Loop

Why revisit this filer page

A newly filed 4 can change the filing history, ownership context, or next research path for Barbara Kosacz.

Latest source-backed update
4 filed 13 Apr 2026
Why come back
Revisit after a new SEC filing appears to compare the updated record with prior filings.
  • Latest filing on record: 4 filed 13 Apr 2026.
  • Save this filer if you want a stable place to return after the next filing cycle.
  • Open the latest filing table or ownership context to verify what changed.

Filer freshness comes from SEC EDGAR submission history and related source-backed ownership or portfolio filings when available.

Jump to save and follow actions Open latest filings table

Latest update

What changed recently for Barbara Kosacz

Ownership report updated

Latest ownership report period: 09 Apr 2026. Open the source-backed page to inspect the fresh filing or facts context.

Update date

13 Apr 2026

Page type

Ownership filings

Latest period

09 Apr 2026

Ownership context was refreshed from SEC Forms 3/4/5 filed on 13 Apr 2026.

Open ownership filings Browse recent public updates

Filer Overview

Barbara Kosacz has filed 29 SEC EDGAR filings since 03 Jan 2019. Common forms include 4, 3.

Barbara Kosacz SEC filings Barbara Kosacz owner filings

Latest Filings

Recent SEC filings for Barbara Kosacz with direct links to document and filing folders.

4 File 001-39503

4 filing

Filing date
13 Apr 2026
Reporting date
09 Apr 2026
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39503

4 filing

Filing date
03 Jun 2025
Reporting date
30 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39801

PRIMARY DOCUMENT

Filing date
23 May 2025
Reporting date
21 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39801

PRIMARY DOCUMENT

Filing date
23 May 2025
Reporting date
21 May 2025
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39503

4 filing

Filing date
24 May 2024
Reporting date
24 May 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39801

PRIMARY DOCUMENT

Filing date
17 May 2024
Reporting date
15 May 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-40877

4 filing

Filing date
16 Feb 2024
Reporting date
14 Feb 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39592

FORM 4 SUBMISSION

Filing date
05 Jan 2024
Reporting date
04 Jan 2024
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39503

FORM 4 SUBMISSION

Filing date
22 May 2023
Reporting date
19 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39801

PRIMARY DOCUMENT

Filing date
19 May 2023
Reporting date
17 May 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39592

FORM 4 SUBMISSION

Filing date
17 Feb 2023
Reporting date
15 Feb 2023
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39592

FORM 4 SUBMISSION

Filing date
27 Jul 2022
Reporting date
25 Jul 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39503

FORM 4 SUBMISSION

Filing date
27 May 2022
Reporting date
20 May 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39801

PRIMARY DOCUMENT

Filing date
20 May 2022
Reporting date
18 May 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39592

FORM 4 SUBMISSION

Filing date
17 Feb 2022
Reporting date
15 Feb 2022
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-40877

FORM 4 SUBMISSION

Filing date
12 Oct 2021
Reporting date
08 Oct 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
3 File 001-40877

FORM 3 SUBMISSION

Filing date
05 Oct 2021
Reporting date
05 Oct 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39801

PRIMARY DOCUMENT

Filing date
21 May 2021
Reporting date
19 May 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39503

FORM 4 SUBMISSION

Filing date
08 Mar 2021
Reporting date
04 Mar 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
3 File 001-39503

FORM 3 SUBMISSION

Filing date
08 Mar 2021
Reporting date
04 Mar 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39866

FORM 4 SUBMISSION

Filing date
14 Jan 2021
Reporting date
12 Jan 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
3 File 001-39866

FORM 3 SUBMISSION

Filing date
07 Jan 2021
Reporting date
07 Jan 2021
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39592

FORM 4 SUBMISSION

Filing date
11 Dec 2020
Reporting date
09 Dec 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 001-39592

FORM 4 SUBMISSION

Filing date
16 Oct 2020
Reporting date
14 Oct 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
3 File 001-39592

FORM 3 SUBMISSION

Filing date
08 Oct 2020
Reporting date
08 Oct 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 000-14710

PRIMARY DOCUMENT

Filing date
27 May 2020
Reporting date
20 May 2020
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 000-14710

PRIMARY DOCUMENT

Filing date
20 May 2019
Reporting date
16 May 2019
SEC evidence
Open document Open filing
Next action
Verify source filing
4 File 000-14710

PRIMARY DOCUMENT

Filing date
03 Jan 2019
Reporting date
01 Jan 2019
SEC evidence
Open document Open filing
Next action
Verify source filing
3 File 000-14710

PRIMARY DOCUMENT

Filing date
03 Jan 2019
Reporting date
01 Jan 2019
SEC evidence
Open document Open filing
Next action
Verify source filing

About this filer

Barbara Kosacz files with the SEC under CIK 0001763316. This page aggregates EDGAR filings and related ownership activity.

FAQ

What is a CIK?
A Central Index Key (CIK) is a unique identifier assigned by the SEC to each filer.
Why are some filings missing?
New filings appear as the SEC updates EDGAR, and older records can vary by availability.
How often is this page updated?
Updates follow new EDGAR submissions and periodic data refreshes.
We use cookies and similar technologies to provide certain features, enhance the user experience and, if you allow them, measure engagement and deliver advertising. Analytics and marketing storage stay off until you grant consent. By clicking on "Agree and continue", you declare your consent to the use of the selected optional cookies. Here you can make detailed settings or revoke your consent (in part if necessary) with effect for the future. For further information, please refer to our Privacy Policy .