IAM: Vogelstein R Jacob reports a conversion

By AlphaYouPublished Oct 19, 2026Form 4

Stocks in this disclosure

Reported activity

Vogelstein R Jacob

Reporting filer

Vogelstein R Jacob reports a conversion, not an open-market purchase or sale, in Iambic Therapeutics, Inc.. Form 4 filed Oct 19, 2026 lists 8 entries.

Disclosed: Oct 19, 2026

Reported details

8 entries

All validated entries in this disclosure
Security	Owner	Date	Code	Action	Quantity	Price	Following holdings	Reporting delay	Filed terms and references
Common Stock	Vogelstein R Jacob	2026-10-16	C	Conversion	1995749	Not stated (see footnotes)	1,995,749	3 days	Filed terms security Title: Common Stock transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 1995749 id: F1 id: F2 id: F3 transaction Acquired Disposed Code: A shares Owned Following Transaction: 1995749 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F4
Common Stock	Vogelstein R Jacob	2026-10-16	C	Conversion	1458290	Not stated (see footnotes)	1,458,290	3 days	Filed terms security Title: Common Stock transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 1458290 id: F5 transaction Acquired Disposed Code: A shares Owned Following Transaction: 1458290 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F6
Common Stock	Vogelstein R Jacob	2026-10-16	C	Conversion	742546	Not stated (see footnotes)	742,546	3 days	Filed terms security Title: Common Stock transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 742546 id: F7 transaction Acquired Disposed Code: A shares Owned Following Transaction: 742546 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F8
Series A Convertible Preferred Stock (derivative)	Vogelstein R Jacob	2026-10-16	C	Conversion	1141878	0	0	3 days	Filed terms security Title: Series A Convertible Preferred Stock id: F1 transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 1141878 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F1 id: F1 underlying Security Title: Common Stock underlying Security Shares: 1141878 shares Owned Following Transaction: 0 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F4
Series B Convertible Preferred Stock (derivative)	Vogelstein R Jacob	2026-10-16	C	Conversion	731187	0	0	3 days	Filed terms security Title: Series B Convertible Preferred Stock id: F2 transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 731187 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F2 id: F2 underlying Security Title: Common Stock underlying Security Shares: 731187 shares Owned Following Transaction: 0 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F4
Series B-3 Convertible Preferred Stock (derivative)	Vogelstein R Jacob	2026-10-16	C	Conversion	122684	0	0	3 days	Filed terms security Title: Series B-3 Convertible Preferred Stock id: F3 transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 122684 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F3 id: F3 underlying Security Title: Common Stock underlying Security Shares: 122684 shares Owned Following Transaction: 0 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F4
Series B-4 Convertible Preferred Stock (derivative)	Vogelstein R Jacob	2026-10-16	C	Conversion	1458290	0	0	3 days	Filed terms security Title: Series B-4 Convertible Preferred Stock id: F5 transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 1458290 transaction Price Per Share: 0 transaction Acquired Disposed Code: D id: F5 id: F5 underlying Security Title: Common Stock underlying Security Shares: 1458290 shares Owned Following Transaction: 0 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F6
Convertible Promissory Notes (derivative)	Vogelstein R Jacob	2026-10-16	C	Conversion	742546	0	0	3 days	Filed terms security Title: Convertible Promissory Notes id: F7 transaction Date: 2026-10-16 transaction Form Type: 4 transaction Code: C equity Swap Involved: 0 transaction Shares: 742546 transaction Price Per Share: 0 transaction Acquired Disposed Code: D exercise Date: 2026-10-16 expiration Date: 2028-08-14 underlying Security Title: Common Stock underlying Security Shares: 742546 shares Owned Following Transaction: 0 direct Or Indirect Ownership: I nature Of Ownership: See footnote id: F8

Common Stock

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 1995749
Price: Not stated (see footnotes)
Following holdings: 1,995,749
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1995749
id: F1
id: F2
id: F3
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 1995749
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Common Stock

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 1458290
Price: Not stated (see footnotes)
Following holdings: 1,458,290
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1458290
id: F5
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 1458290
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F6

Common Stock

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 742546
Price: Not stated (see footnotes)
Following holdings: 742,546
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Common Stock
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 742546
id: F7
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 742546
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F8

Series A Convertible Preferred Stock (derivative)

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 1141878
Price: 0
Following holdings: 0
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Series A Convertible Preferred Stock
id: F1
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1141878
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F1
id: F1
underlying Security Title: Common Stock
underlying Security Shares: 1141878
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Series B Convertible Preferred Stock (derivative)

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 731187
Price: 0
Following holdings: 0
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Series B Convertible Preferred Stock
id: F2
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 731187
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Common Stock
underlying Security Shares: 731187
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Series B-3 Convertible Preferred Stock (derivative)

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 122684
Price: 0
Following holdings: 0
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Series B-3 Convertible Preferred Stock
id: F3
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 122684
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Common Stock
underlying Security Shares: 122684
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Series B-4 Convertible Preferred Stock (derivative)

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 1458290
Price: 0
Following holdings: 0
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Series B-4 Convertible Preferred Stock
id: F5
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1458290
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F5
id: F5
underlying Security Title: Common Stock
underlying Security Shares: 1458290
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F6

Convertible Promissory Notes (derivative)

Owner: Vogelstein R Jacob
Date: 2026-10-16
Code: C
Action: Conversion
Quantity: 742546
Price: 0
Following holdings: 0
Reporting delay: 3 days
Filed terms and references: Filed terms
security Title: Convertible Promissory Notes
id: F7
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 742546
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
exercise Date: 2026-10-16
expiration Date: 2028-08-14
underlying Security Title: Common Stock
underlying Security Shares: 742546
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F8

Purchases, sales, grants and option exercises are different transactions. The reported code identifies the action; it does not establish a motive.

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.
Vogelstein R Jacob: Director.
F1: Each share of Series A Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.
F2: Each share of Series B Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.
F3: Each share of Series B-3 Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.
F4: The shares are held of record by Catalio Nexus Fund III, LP, or Catalio Nexus. Catalio Capital Management, LP, or Catalio Capital Mgmt, a registered investment advisor, is the investment manager for Catalio Nexus. As a managing partner of Catalio Capital Mgmt, the reporting person shares voting and dispositive power with respect to the shares held by Catalio Nexus. The reporting person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any.
F5: Each share of Series B-4 Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.
F6: The shares are held of record by Catalio Access Fund VIII, LLC, or Catalio Access. Catalio Capital Mgmt provides investment management services for Catalio Access. As a managing partner of Catalio Capital Mgmt, the reporting person shares voting and dispositive power with respect to the shares held by Catalio Access.The reporting person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any.
F7: The conversion price was equal to 85% of the Issuer's initial public offering price of $16.00 per share (reflecting a 15% discount).
F8: The shares are held of record by Catalio BH SPV, LLC, or Catalio SPV. Catalio Capital Mgmt is the investment manager for Catalio SPV. As a managing partner of Catalio Capital Mgmt, the reporting person shares voting and dispositive power with respect to the shares held by Catalio SPV. The reporting person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any.

Original sources

SEC ownership filing

Prepared automatically from public filing data. Report a correction.

Security

Owner

Date

Code

Action

Quantity

Price

Following holdings

Reporting delay

Filed terms and references

Common Stock

Vogelstein R Jacob

2026-10-16

Conversion

1995749

Not stated (see footnotes)

1,995,749

3 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1995749
id: F1
id: F2
id: F3
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 1995749
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Common Stock

Vogelstein R Jacob

2026-10-16

Conversion

1458290

Not stated (see footnotes)

1,458,290

3 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1458290
id: F5
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 1458290
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F6

Common Stock

Vogelstein R Jacob

2026-10-16

Conversion

742546

Not stated (see footnotes)

742,546

3 days

Filed terms

security Title: Common Stock
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 742546
id: F7
transaction Acquired Disposed Code: A
shares Owned Following Transaction: 742546
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F8

Series A Convertible Preferred Stock (derivative)

Vogelstein R Jacob

2026-10-16

Conversion

1141878

3 days

Filed terms

security Title: Series A Convertible Preferred Stock
id: F1
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1141878
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F1
id: F1
underlying Security Title: Common Stock
underlying Security Shares: 1141878
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Series B Convertible Preferred Stock (derivative)

Vogelstein R Jacob

2026-10-16

Conversion

731187

3 days

Filed terms

security Title: Series B Convertible Preferred Stock
id: F2
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 731187
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F2
id: F2
underlying Security Title: Common Stock
underlying Security Shares: 731187
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Series B-3 Convertible Preferred Stock (derivative)

Vogelstein R Jacob

2026-10-16

Conversion

122684

3 days

Filed terms

security Title: Series B-3 Convertible Preferred Stock
id: F3
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 122684
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F3
id: F3
underlying Security Title: Common Stock
underlying Security Shares: 122684
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F4

Series B-4 Convertible Preferred Stock (derivative)

Vogelstein R Jacob

2026-10-16

Conversion

1458290

3 days

Filed terms

security Title: Series B-4 Convertible Preferred Stock
id: F5
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 1458290
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
id: F5
id: F5
underlying Security Title: Common Stock
underlying Security Shares: 1458290
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F6

Convertible Promissory Notes (derivative)

Vogelstein R Jacob

2026-10-16

Conversion

742546

3 days

Filed terms

security Title: Convertible Promissory Notes
id: F7
transaction Date: 2026-10-16
transaction Form Type: 4
transaction Code: C
equity Swap Involved: 0
transaction Shares: 742546
transaction Price Per Share: 0
transaction Acquired Disposed Code: D
exercise Date: 2026-10-16
expiration Date: 2028-08-14
underlying Security Title: Common Stock
underlying Security Shares: 742546
shares Owned Following Transaction: 0
direct Or Indirect Ownership: I
nature Of Ownership: See footnote
id: F8

Filing context

Quantities and prices are shown in the units filed. No trade value is inferred from their product.

Vogelstein R Jacob: Director.

F1: Each share of Series A Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F2: Each share of Series B Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F3: Each share of Series B-3 Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F4: The shares are held of record by Catalio Nexus Fund III, LP, or Catalio Nexus. Catalio Capital Management, LP, or Catalio Capital Mgmt, a registered investment advisor, is the investment manager for Catalio Nexus. As a managing partner of Catalio Capital Mgmt, the reporting person shares voting and dispositive power with respect to the shares held by Catalio Nexus. The reporting person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any.

F5: Each share of Series B-4 Convertible Preferred Stock automatically converted into Common Stock on a one-to-one basis immediately prior to the completion of the Issuer's initial public offering of Common Stock and had no expiration date.

F6: The shares are held of record by Catalio Access Fund VIII, LLC, or Catalio Access. Catalio Capital Mgmt provides investment management services for Catalio Access. As a managing partner of Catalio Capital Mgmt, the reporting person shares voting and dispositive power with respect to the shares held by Catalio Access.The reporting person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any.

F7: The conversion price was equal to 85% of the Issuer's initial public offering price of $16.00 per share (reflecting a 15% discount).

F8: The shares are held of record by Catalio BH SPV, LLC, or Catalio SPV. Catalio Capital Mgmt is the investment manager for Catalio SPV. As a managing partner of Catalio Capital Mgmt, the reporting person shares voting and dispositive power with respect to the shares held by Catalio SPV. The reporting person disclaims beneficial ownership of the securities reported herein for purposes of Section 16 of the Exchange Act, except to the extent of his pecuniary interest therein, if any.