Form 4 - Statement of changes in beneficial ownership of securities:
SEC Accession No. 0001415889-25-022457
Filing Date
2025-08-20
Accepted
2025-08-20 16:34:29
Documents
1
Period of Report
2025-08-18

Document Format Files

Seq Description Document Type Size
1 form4-08202025_080825.html 4  
1 form4-08202025_080825.xml 4 12106
  Complete submission text file 0001415889-25-022457.txt   16746
Mailing Address 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116
Business Address 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 6178241094
SUMMIT PARTNERS L P (Reporting) CIK: 0000830588 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-40478 | Film No.: 251237264

Mailing Address 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116
Business Address 222 BERKELEY STREET 18TH FLOOR BOSTON MA 02116 617-824-1000
Summit Partners Growth Equity Fund IX-A, L.P. (Reporting) CIK: 0001634415 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-40478 | Film No.: 251237263

Mailing Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116
Business Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 617-824-1000
Summit Partners Growth Equity Fund IX-B, L.P. (Reporting) CIK: 0001634426 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-40478 | Film No.: 251237262

Mailing Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116
Business Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 (617) 824-1100
SUMMIT INVESTORS GE IX/VC IV, LLC (Reporting) CIK: 0001654074 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-40478 | Film No.: 251237261

Mailing Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116
Business Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 617-824-1000
Summit Partners Entrepreneur Advisors Fund II, L.P. (Reporting) CIK: 0001660981 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-40478 | Film No.: 251237259

Mailing Address 4800 N. SCOTTSDALE ROAD SUITE 2500 SCOTTSDALE AZ 85251
Business Address 4800 N. SCOTTSDALE ROAD SUITE 2500 SCOTTSDALE AZ 85251 602-767-2100
LifeStance Health Group, Inc. (Issuer) CIK: 0001845257 (see all company filings)

EIN.: 000000000 | State of Incorp.: DE | Fiscal Year End: 1231
SIC: 8000 Services-Health Services
(CF Office: 08 Industrial Applications and Services)

Mailing Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116
Business Address 222 BERKELEY STREET, 18TH FLOOR BOSTON MA 02116 (617) 824-1000
SUMMIT INVESTORS GE IX/VC IV (UK), L.P. (Reporting) CIK: 0001846709 (see all company filings)

State of Incorp.: E9 | Fiscal Year End: 1231
Type: 4 | Act: 34 | File No.: 001-40478 | Film No.: 251237260