Korro Bio insider Lynx1 Capital buys 6,684 shares

Korro Bio, Inc. reported insider purchases of common stock by entities associated with Lynx1 Capital Management LP and Weston Nichols.

Rhea-AI Filing Summary

Korro Bio, Inc. reported insider purchases of common stock by entities associated with Lynx1 Capital Management LP and Weston Nichols. On August 6, 2026, Lynx1 Master Fund LP purchased 5,222 shares at a weighted average price of $11.3998 per share, and on August 10, 2026 it purchased 1,462 shares at a weighted average price of $13.1869, for a total of 6,684 shares, all held indirectly. The investment manager and Mr. Nichols disclaim beneficial ownership except to the extent of any pecuniary interest.

Insider Trade Summary

Net Buyer: 6,684 shares

Net Buy 2 txns

Insider Lynx1 Capital Management LP, Nichols Weston

Role 10% Owner | 10% Owner

Bought 6,684 shs ($79K)

Type	Security	Shares	Price	Value
Purchase	Common stock, $0.001 par value per share F3, F1	1,462	$13.1869	$19K
Purchase	Common stock, $0.001 par value per share F2, F1	5,222	$11.3998	$60K

Holdings After Transaction: Common stock, $0.001 par value per share — 1,544,980 shares (Indirect, See footnote)

Footnotes (3)

1. F1. The securities to which this filing relates are held directly by Lynx1 Master Fund LP to which Lynx1 Capital Management LP (the "Investment Manager") serves as investment manager. Weston Nichols ("Mr. Nichols") is the sole member of Lynx1 Capital Management GP LLC, the general partner of the Investment Manager. Each of the Investment Manager and Mr. Nichols disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of his or its pecuniary interest therein, if any.
2. F2. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $11.39 to $11.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.
3. F3. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.11 to $13.50 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.

Key Figures

Shares purchased 6 Aug 2026: 5,222 shares Weighted average price 6 Aug 2026: $11.3998 per share Shares purchased 10 Aug 2026: 1,462 shares +2 more

5 metrics

Shares purchased 6 Aug 2026 5,222 shares Indirect open-market purchase of common stock

Weighted average price 6 Aug 2026 $11.3998 per share Price for 5,222-share purchase; trades ranged $11.39–$11.40

Shares purchased 10 Aug 2026 1,462 shares Indirect open-market purchase of common stock

Weighted average price 10 Aug 2026 $13.1869 per share Price for 1,462-share purchase; trades ranged $13.11–$13.50

Total shares purchased 6,684 shares Combined indirect purchases on August 6 and 10, 2026

Key Terms

weighted average price, beneficial ownership, pecuniary interest, Section 16

4 terms

weighted average price financial

"The price reported in Column 4 is a weighted average price."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

beneficial ownership financial

"disclaims beneficial ownership of the securities to which this filing relates"

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.

pecuniary interest financial

"except to the extent of his or its pecuniary interest therein, if any"

Section 16 regulatory

"for purposes of Section 16 of the Securities and Exchange Act of 1934"

Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did Korro Bio (KRRO) report in this Form 4?

The Form 4 reports that entities associated with Lynx1 Capital Management LP purchased a total of 6,684 shares of Korro Bio common stock in open-market transactions on August 6 and 10, 2026.

What prices were paid in the recent KRRO insider purchases?

The filing shows weighted average purchase prices of $11.3998 per share for 5,222 shares on August 6, 2026 and $13.1869 per share for 1,462 shares on August 10, 2026.

Who is the reporting owner in Korro Bio (KRRO)'s Form 4 filing?

The reporting owners are Lynx1 Capital Management LP and Weston Nichols, in connection with shares held directly by Lynx1 Master Fund LP, for which Lynx1 Capital Management LP serves as investment manager.

Are the KRRO shares held directly or indirectly by the reporting persons?

The reported 6,684 shares are held indirectly through Lynx1 Master Fund LP. The investment manager and Weston Nichols disclaim beneficial ownership except to the extent of any pecuniary interest.

How were the Korro Bio (KRRO) insider trade prices calculated?

For each trade date, the per-share price is a weighted average price. On August 6, 2026 trades ranged from $11.39 to $11.40, and on August 10, 2026 from $13.11 to $13.50, inclusive.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 08/13/2026 - 09:54 AM Accepted by SEC EDGAR 08/13/2026 - 09:54 AM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED 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^*

Lynx1 Capital Management LP

(Last) (First) (Middle)

D81 CALLE C

SUITE 301 PMB 1202

(Street)

DORADO PR 00646

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Korro Bio, Inc. [ KRRO ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/06/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

	Form filed by One Reporting Person
X	Form 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)
			Code	V	Amount	(A) or (D)	Price
Common stock, $0.001 par value per share	08/06/2026		P		5,222	A	$11.3998(2)	1,543,518	I	See footnote(1)
Common stock, $0.001 par value per share	08/10/2026		P		1,462	A	$13.1869(3)	1,544,980	I	See footnote(1)

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)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person^*

Lynx1 Capital Management LP

(Last) (First) (Middle)

D81 CALLE C

SUITE 301 PMB 1202

(Street)

DORADO PR 00646

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

1. Name and Address of Reporting Person^*

Nichols Weston

(Last) (First) (Middle)

D81 CALLE C

SUITE 301 PMB 1202

(Street)

DORADO PR 00646

(City) (State) (Zip)

UNITED STATES

(Country)

Relationship of Reporting Person(s) to Issuer

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

Explanation of Responses:

1. The securities to which this filing relates are held directly by Lynx1 Master Fund LP to which Lynx1 Capital Management LP (the "Investment Manager") serves as investment manager. Weston Nichols ("Mr. Nichols") is the sole member of Lynx1 Capital Management GP LLC, the general partner of the Investment Manager. Each of the Investment Manager and Mr. Nichols disclaims beneficial ownership of the securities to which this filing relates for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended, except to the extent of his or its pecuniary interest therein, if any.

2. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $11.39 to $11.40 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission (the "SEC"), upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.

3. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $13.11 to $13.50 inclusive. The Reporting Persons undertake to provide to the Issuer, any security holder of the Issuer, or the staff of the SEC, upon request, full information regarding the number of shares purchased at each separate price within the range set forth herein.

	Lynx1 Capital Management LP, By: Lynx1 Capital Management GP LLC, its general partner, By: /s/ Weston Nichols, Sole Member	08/13/2026
	/s/ Weston Nichols	08/13/2026
	** Signature of Reporting Person	Date
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)