RA CAPITAL MANAGEMENT, L.P. - 15 Jun 2026 Form 4 Insider Report for Hemab Therapeutics Holdings, Inc. (COAG)

Reporting relationship
10%+ Owner
Issuer ticker
COAG
Reported as of
15 Jun 2026
Net transaction value
+$1,689,818
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
4
Accepted by SEC
17 Jun 2026, 18:24:22 UTC
Prior SEC filing
16 Jun 2026
Next SEC filing
22 Jun 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Peter Kolchinsky, Manager of RA Capital Management, L.P.
Filing notes and source

Key filing fact

RA CAPITAL MANAGEMENT, L.P. filed Form 4 for Hemab Therapeutics Holdings, Inc. (COAG) on 17 Jun 2026.

Key facts

  • This page summarizes RA CAPITAL MANAGEMENT, L.P.'s Form 4 filing for Hemab Therapeutics Holdings, Inc. (COAG).
  • 2 reported transactions and 0 derivative rows are listed below.
  • Accepted by SEC: 17 Jun 2026, 18:24.

Change

  • Previous filing in this sequence was filed on 16 Jun 2026.
  • Current net transaction value: +$1,689,818.

Research use

  • This tells you what this filing adds before you inspect full transaction and derivative tables.
  • You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (4)

CIK 0001346824 Primary reporting owner

RA CAPITAL MANAGEMENT, L.P.

Relationship
10%+ Owner
Address
200 BERKELEY STREET, 18TH FLOOR, BOSTON
Signature
/s/ Peter Kolchinsky, Manager of RA Capital Management, L.P.
Signature date
17 Jun 2026
CIK 0001315082

RA Capital Healthcare Fund LP

Relationship
10%+ Owner
Address
C/O RA CAPITAL MANAGEMENT, L.P., 200 BERKELEY STREET, 18TH FLOOR, BOSTON
Signature
/s/ Peter Kolchinsky, Manager of RA Capital Healthcare Fund GP, LLC the General Partner of RA Capital Healthcare Fund, L.P.
Signature date
17 Jun 2026
CIK 0001384859

Kolchinsky Peter

Relationship
10%+ Owner
Address
C/O RA CAPITAL MANAGEMENT, L.P., 200 BERKELEY STREET, 18TH FLOOR, BOSTON
Signature
/s/ Peter Kolchinsky, individually
Signature date
17 Jun 2026
CIK 0001619841

Shah Rajeev M.

Relationship
10%+ Owner
Address
C/O RA CAPITAL MANAGEMENT, L.P., 200 BERKELEY STREET, 18TH FLOOR, BOSTON
Signature
/s/ Rajeev Shah, individually
Signature date
17 Jun 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

COAG transaction

Common Stock

Purchase

Transaction value
$152,974
Shares
+6,146
Change %
+0.1%
Price
$24.89
Shares after
6,383,114
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2, F3
COAG transaction

Common Stock

Purchase

Transaction value
$152,974
Shares
+6,146
Change %
+0.1%
Price
$24.89
Shares after
6,383,114
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2, F3
COAG transaction

Common Stock

Purchase

Transaction value
$152,974
Shares
+6,146
Change %
+0.1%
Price
$24.89
Shares after
6,383,114
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2, F3
COAG transaction

Common Stock

Purchase

Transaction value
$152,974
Shares
+6,146
Change %
+0.1%
Price
$24.89
Shares after
6,383,114
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2, F3
COAG transaction

Common Stock

Purchase

Transaction value
$1,536,845
Shares
+61,523
Change %
+0.96%
Price
$24.98
Shares after
6,444,637
Date
16 Jun 2026
Ownership
See footnotes
Footnotes
F2, F3, F4
COAG transaction

Common Stock

Purchase

Transaction value
$1,536,845
Shares
+61,523
Change %
+0.96%
Price
$24.98
Shares after
6,444,637
Date
16 Jun 2026
Ownership
See footnotes
Footnotes
F2, F3, F4
COAG transaction

Common Stock

Purchase

Transaction value
$1,536,845
Shares
+61,523
Change %
+0.96%
Price
$24.98
Shares after
6,444,637
Date
16 Jun 2026
Ownership
See footnotes
Footnotes
F2, F3, F4
COAG transaction

Common Stock

Purchase

Transaction value
$1,536,845
Shares
+61,523
Change %
+0.96%
Price
$24.98
Shares after
6,444,637
Date
16 Jun 2026
Ownership
See footnotes
Footnotes
F2, F3, F4
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,009,052
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F5
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,009,052
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F5
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,009,052
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F5
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
1,009,052
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F5
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
354,938
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F6
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
354,938
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F6
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
354,938
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F6
COAG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
354,938
Date
15 Jun 2026
Ownership
See footnotes
Footnotes
F2, F6
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $24.55 to $25.00 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, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

Footnote F2

RA Capital Management, L.P. (the "Adviser") is the investment manager for RA Capital Healthcare Fund, L.P. (the "Fund"), RA Capital Nexus II Fund, L.P. (the "Nexus Fund II") and RA Capital Nexus IV Fund, L.P. (the "Nexus Fund IV"). The general partner of the Adviser is RA Capital Management GP, LLC (the "Adviser GP"), of which Dr. Peter Kolchinsky and Mr. Rajeev Shah are the managing members. The Adviser, the Adviser GP, the Fund, Dr. Kolchinsky and Mr. Shah disclaim beneficial ownership of any of the reported securities, except to the extent of their pecuniary interest therein.

Footnote F3

Held directly by the Fund.

Footnote F4

The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $24.65 to $25.00 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, upon request, full information regarding the number of shares purchased at each separate price within the range set forth in this footnote.

Footnote F5

Held directly by Nexus Fund II.

Footnote F6

Held directly by Nexus Fund IV.

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. Manage preferences to update or revoke optional consent for future visits. For more information, see our Privacy Policy .