RA CAPITAL MANAGEMENT, L.P. - 22 Jun 2026 Form 3 Insider Report for Solid Biosciences Inc. (SLDB)

Reporting relationship
10%+ Owner
Issuer ticker
SLDB
Reported as of
22 Jun 2026
Net transaction value
$0
Source evidence Original filing metadata and source links for verification. 5 source fields
SEC form
3
Accepted by SEC
24 Jun 2026, 18:50:25 UTC
Prior SEC filing
22 Jun 2026
Next SEC filing
26 Jun 2026
Source filing
View source filing
Reporting owner 1 detail
Reporting owner signature
/s/ Peter Kolchinsky, Manager of RA Capital Management, L.P.

Key filing fact

RA CAPITAL MANAGEMENT, L.P. filed Form 3 for Solid Biosciences Inc. (SLDB) on 24 Jun 2026.

Key facts

  • This page summarizes RA CAPITAL MANAGEMENT, L.P.'s Form 3 filing for Solid Biosciences Inc. (SLDB).
  • 0 reported transactions and 4 derivative rows are listed below.
  • Accepted by SEC: 24 Jun 2026, 18:50.

Change

  • Previous filing in this sequence was filed on 22 Jun 2026.
  • Current net transaction value: $0.

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

Official SEC source

Ownership activity is grounded in SEC Form 3 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
24 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
24 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
24 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
24 Jun 2026

Reported non-derivative transactions

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

SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,897,896
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,897,896
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,897,896
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
11,897,896
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F2
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
109,661
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F3
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
109,661
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F3
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
109,661
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F3
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
109,661
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F3
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
28,569
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F4
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
28,569
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F4
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
28,569
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F4
SLDB holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
28,569
Date
22 Jun 2026
Ownership
See footnotes
Footnotes
F1, F4

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SLDB holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
22 Jun 2026
Ownership
See footnotes
Underlying class
Common Stock
Underlying amount
8,178,412
Exercise price
$0.001000
Footnotes
F1, F2, F5
SLDB holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
22 Jun 2026
Ownership
See footnotes
Underlying class
Common Stock
Underlying amount
8,178,412
Exercise price
$0.001000
Footnotes
F1, F2, F5
SLDB holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
22 Jun 2026
Ownership
See footnotes
Underlying class
Common Stock
Underlying amount
8,178,412
Exercise price
$0.001000
Footnotes
F1, F2, F5
SLDB holding Derivative

Pre-Funded Warrants (Right to Buy)

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after
Date
22 Jun 2026
Ownership
See footnotes
Underlying class
Common Stock
Underlying amount
8,178,412
Exercise price
$0.001000
Footnotes
F1, F2, F5
* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

RA Capital Management, L.P. (the "Adviser") is the investment manager for RA Capital Healthcare Fund, L.P. (the "Fund"), RA Capital Nexus Fund, L.P. (the "Nexus Fund"), and a separately managed account (the "Account"). 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. Each of the Adviser, the Adviser GP, the Fund, Dr. Kolchinsky and Mr. Shah disclaims beneficial ownership of any of the reported securities, except to the extent of its or his respective pecuniary interest therein.

Footnote F2

Held directly by the Fund.

Footnote F3

Held directly by the Nexus Fund.

Footnote F4

Held directly by the Account.

Footnote F5

The Pre-Funded Warrants have no expiration date and are exercisable immediately. Notwithstanding the foregoing, the Fund shall not be entitled to exercise the Pre-Funded Warrants to the extent that it would cause the aggregate number of shares of Common Stock beneficially owned by the Fund, together with its Attribution Parties (as defined in the Pre-Funded Warrants), to exceed 9.99% of the total number of issued and outstanding shares of Common Stock of the Issuer following such exercise.

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