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Institutional ownership intelligence
Schedule 13G/A

COLL Schedule 13G/A filing by Renaissance Technologies

Renaissance Technologies reported beneficial ownership of 1.5M shares, representing 4.53% of COLLEGIUM PHARMACEUTICAL, INC in this filing.

FiledMay 14, 2026
Ownership dateJan 8, 2026
Reported shares1.5M
Reported ownership4.53%
Ownership details

Voting and dispositive power reported in the filing

These figures describe the reporting filer’s disclosed voting and investment authority. They should be read together with the reported share count and percentage.

Sole voting power 1.5M
Shared voting power 0
Sole dispositive power 1.5M
Shared dispositive power 0
Compared with the prior filing

How the reported position changed

This compares the current filing with the previous tracked Schedule 13 filing from the same reporting CIK for COLL. A change between filings does not by itself establish when shares were bought or sold.

Previous filingNov 13, 2025
Reported share change-129,740
Ownership percentage change-0.53 pts
Previous filingThis filing
Reported shares1.6M1.5M
Reported ownership5.06%4.53%
Price context

Price dates alongside the ownership filing

Price data provides market context around the disclosure. It does not identify the filer’s actual transaction price.

Close near filing date$34.83as of May 14, 2026
Latest tracked price$35.74as of Aug 5, 2026
Source

Original filing and accession

Use the SEC filing as the primary source when you need the complete disclosure, footnotes, exhibits, or reporting-person details.

Reporting filer
Renaissance Technologies
CIK
CIK0001037389
Accession
0001037389-26-000035
Form
Schedule 13G/A
Read the filing in context

Understand what a Schedule 13 filing does—and does not—tell you.