STOCK TITAN

ARCH XIII converts Kardigan (NASDAQ: KARD) preferred stock into 13.8M common shares

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Kardigan, Inc. reported that investment entity ARCH Venture Fund XIII, L.P. converted its preferred equity into common stock in connection with Kardigan’s initial public offering. On June 17, 2026, all Series A, Series B, and Series B-1 Preferred Stock automatically converted into common shares on a 1.5928-for-1 basis upon effectiveness of Kardigan’s Form S-1, with no cash paid. Following these conversions, ARCH Venture Fund XIII, L.P. indirectly holds 13,792,035 shares of Common Stock. The filing notes that related ARCH entities and investment committee members may be deemed beneficial owners but disclaim beneficial ownership beyond any pecuniary interest.

Positive

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Negative

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Insider ARCH Venture Partners XIII, LLC, ARCH Venture Partners XIII, L.P., ARCH Venture Fund XIII, L.P., CRANDELL KEITH, NELSEN ROBERT, Burow Kristina, GILLIS STEVEN
Role null | null | null | null | null | null | null
Type Security Shares Price Value
Conversion Series A Preferred Stock 5,148,587 $0.00 --
Conversion Series B Preferred Stock 1,204,000 $0.00 --
Conversion Series B-1 Preferred Stock 2,306,401 $0.00 --
Conversion Common Stock 13,792,035 $0.00 --
Holdings After Transaction: Series A Preferred Stock — 0 shares (Indirect, By ARCH Venture Fund XIII, L.P.); Series B Preferred Stock — 0 shares (Indirect, By ARCH Venture Fund XIII, L.P.); Series B-1 Preferred Stock — 0 shares (Indirect, By ARCH Venture Fund XIII, L.P.); Common Stock — 13,792,035 shares (Indirect, By: ARCH Venture Fund XIII, L.P.)
Footnotes (1)
  1. Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date. These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.
Common shares held 13,792,035 shares Indirectly held by ARCH Venture Fund XIII, L.P. after conversions
Series A Preferred converted 5,148,587 shares Series A Preferred Stock converted into common on June 17, 2026
Series B Preferred converted 1,204,000 shares Series B Preferred Stock converted into common on June 17, 2026
Series B-1 Preferred converted 2,306,401 shares Series B-1 Preferred Stock converted into common on June 17, 2026
Underlying common from Series A 8,200,669 shares Common stock received upon Series A Preferred conversion
Underlying common from Series B 1,917,731 shares Common stock received upon Series B Preferred conversion
Underlying common from Series B-1 3,673,635 shares Common stock received upon Series B-1 Preferred conversion
Conversion ratio 1.5928-for-1 Preferred Stock to common stock conversion ratio at IPO effectiveness
Conversion of derivative security financial
"transaction_code_description: Conversion of derivative security"
Preferred Stock financial
"Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock"
Preferred stock is a type of ownership in a company that typically offers investors higher and more consistent dividend payments than common stock. Unlike regular shares, preferred stock usually doesn’t come with voting rights but provides a priority claim on the company’s assets and profits, making it a more stable and predictable investment option. This makes preferred stock attractive to those seeking steady income with lower risk.
initial public offering financial
"upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering"
An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.
Form S-1 regulatory
"upon the effectiveness of the Issuer's registration statement on Form S-1"
A Form S-1 is the registration filing a company submits to the U.S. Securities and Exchange Commission when it plans to offer stock to the public, most commonly for an initial public offering. Think of it as the company’s full disclosure packet or blueprint: it contains audited financials, business description, management background, risk factors and details of the offering, giving investors the information needed to judge the company’s financial health and potential risks before buying shares.
beneficial ownership financial
"disclaims beneficial ownership except to the extent of their pecuniary interest"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
ARCH Venture Partners XIII, LLC

(Last)(First)(Middle)
C/O ARCH VENTURE PARTNERS
8755 W. HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Kardigan, Inc. [ KARD ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirectorX10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/17/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/17/2026C13,792,035A(1)13,792,035IBy: ARCH Venture Fund XIII, L.P.(2)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Series A Preferred Stock(1)06/17/2026C5,148,587 (1) (1)Common Stock8,200,669(1)0IBy ARCH Venture Fund XIII, L.P.(2)
Series B Preferred Stock(1)06/17/2026C1,204,000 (1) (1)Common Stock1,917,731(1)0IBy ARCH Venture Fund XIII, L.P.(2)
Series B-1 Preferred Stock(1)06/17/2026C2,306,401 (1) (1)Common Stock3,673,635(1)0IBy ARCH Venture Fund XIII, L.P.(2)
1. Name and Address of Reporting Person*
ARCH Venture Partners XIII, LLC

(Last)(First)(Middle)
C/O ARCH VENTURE PARTNERS
8755 W. HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
XDirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
ARCH Venture Partners XIII, L.P.

(Last)(First)(Middle)
8755 W. HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
ARCH Venture Fund XIII, L.P.

(Last)(First)(Middle)
8755 W. HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
CRANDELL KEITH

(Last)(First)(Middle)
8755 W. HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
NELSEN ROBERT

(Last)(First)(Middle)
8755 W. HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Burow Kristina

(Last)(First)(Middle)
8755 W. HIGGINS ROAD,SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
GILLIS STEVEN

(Last)(First)(Middle)
8755 WEST HIGGINS ROAD, SUITE 1025

(Street)
CHICAGO ILLINOIS 60631

(City)(State)(Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
1. Each share of Series A Preferred Stock, Series B Preferred Stock and Series B-1 Preferred Stock (collectively, the "Preferred Stock") automatically converted into the number of shares shown in Column 7 on a 1.5928 for 1 basis upon the effectiveness of the Issuer's registration statement on Form S-1 relating to its initial public offering on June 17, 2026 and without payment of consideration. The Preferred Stock had no expiration date.
2. These securities are directly held by ARCH Venture Fund XIII, L.P. ("ARCH XIII"). ARCH Venture Partners XIII, L.P. ("AVP XIII LP") is the general partner of ARCH XIII. ARCH Venture Partners XIII, LLC ("AVP XIII LLC") is the general partner of AVP XIII LP. Paul Berns, Kristina M. Burow, Keith Crandell, Steven Gillis and Robert Nelsen are members of the investment committee of AVP XIII LLC (the "AVP XIII LLC Committee Members"). Mr. Berns serves on the board of directors of the Issuer. Each of AVP XIII LP and AVP XIII LLC may be deemed to beneficially own the shares held by ARCH XIII, and each of the AVP XIII LLC Committee Members may be deemed to share the power to direct the disposition and vote of the shares held by ARCH XIII. Each of AVP XIII LP, AVP XIII LLC and the AVP XIII LLC Committee Members disclaims beneficial ownership except to the extent of their pecuniary interest therein, if any.
ARCH Venture Partners XIII, LLC, By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director06/22/2026
ARCH Venture Partners XIII, L.P., By: ARCH Venture Partners XIII, LLC, its General Partner, By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director06/22/2026
ARCH Venture Fund XIII, L.P., By: ARCH Venture Partners XIII, L.P., its General Partner, By: ARCH Venture Partners XIII, LLC, its General Partner, By: /s/ Mark McDonnell, as Attorney-in-Fact for Keith Crandell, Managing Director06/22/2026
Keith Crandell, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact06/22/2026
Robert Nelsen, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact06/22/2026
Kristina Burow, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact06/22/2026
Steven Gillis, Managing Director, By: /s/ Mark McDonnell, as Attorney-in-Fact06/22/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did ARCH Venture Fund XIII report for Kardigan, Inc. (KARD)?

ARCH Venture Fund XIII, L.P. reported converting its preferred stock in Kardigan into common shares. All Series A, Series B, and Series B-1 Preferred Stock automatically converted to common on June 17, 2026 in connection with Kardigan’s IPO, leaving ARCH XIII holding 13,792,035 common shares.

How many Kardigan (KARD) common shares does ARCH Venture Fund XIII hold after this Form 4?

After the reported conversions, ARCH Venture Fund XIII, L.P. indirectly holds 13,792,035 Kardigan common shares. These shares resulted from automatic conversion of Series A, Series B, and Series B-1 Preferred Stock at IPO effectiveness, rather than from open-market purchases or sales.

What preferred stock classes in Kardigan (KARD) were converted by ARCH Venture Fund XIII?

ARCH Venture Fund XIII, L.P. converted Kardigan’s Series A, Series B, and Series B-1 Preferred Stock into common stock. The conversion was automatic at IPO effectiveness, using a 1.5928-for-1 ratio for each preferred share, consolidating its position into common equity with no cash consideration.

Was cash paid for ARCH Venture Fund XIII’s conversion of Kardigan (KARD) preferred stock?

No cash was paid for the conversion of Kardigan preferred stock held by ARCH Venture Fund XIII, L.P. The footnote explains each preferred share automatically converted into common shares upon Kardigan’s Form S-1 effectiveness, on a 1.5928-for-1 basis, without payment of consideration.

Who is considered to beneficially own the Kardigan (KARD) shares held by ARCH XIII?

The securities are directly held by ARCH Venture Fund XIII, L.P., with its general partners ARCH Venture Partners XIII, L.P. and ARCH Venture Partners XIII, LLC. Certain committee members may be deemed to share voting and disposition power but disclaim beneficial ownership beyond any pecuniary interest.