Filing Details

Accession Number:
0000950170-25-014583
Form Type:
13D Filing
Publication Date:
2025-02-04 19:00:00
Filed By:
Flagship V VentureLabs Rx Fund, L.P.
Company:
Omega Therapeutics Inc.
Filing Date:
2025-02-05
SEC Url:
13D Filing
Ownership Summary

Please notice the below summary table is generated without human intervention and may contain errors. Please refer to the complete filing displayed below for exact figures.

Name Sole Voting Power Shared Voting Power Sole Dispositive Power Shared Dispositive Power Aggregate Amount Owned Power Percent of Class
Flagship V VentureLabs Rx Fund, L.P. 0 1,088,470 0 1,088,470 1,088,470 2%
Flagship Ventures Fund V, L.P. 0 5,896,386 0 5,896,386 5,896,386 10.6%
Flagship Ventures Fund V General Partner LLC 0 6,984,856 0 6,984,856 6,984,856 12.6%
Flagship Pioneering Fund VI, L.P. 0 8,617,413 0 8,617,413 8,617,413 15.6%
Flagship Pioneering Fund VI General Partner LLC 0 8,617,413 0 8,617,413 8,617,413 15.6%
Nutritional Health LTP Fund, L.P. 0 970,588 0 970,588 970,588 1.8%
Nutritional Health LTP Fund General Partner LLC 0 970,588 0 970,588 970,588 1.8%
Flagship Pioneering Special Opportunities Fund II, L.P. 0 7,508,693 0 7,508,693 7,508,693 13.6%
Flagship Pioneering Special Opportunities Fund II General Partner LLC 0 7,508,693 0 7,508,693 7,508,693 13.6%
FPN, L.P. 0 1,617,646 0 1,617,646 1,617,646 2.9%
FPN General Partner LLC 0 1,617,646 0 1,617,646 1,617,646 2.9%
Flagship VentureLabs V, LLC 0 2,197,059 0 2,197,059 2,197,059 4%
Flagship VentureLabs V Manager LLC 0 2,197,059 0 2,197,059 2,197,059 4%
Flagship Pioneering Fund VII, L.P. 0 1,329,324 0 1,329,324 1,329,324 2.4%
Flagship Pioneering Fund VII General Partner LLC 0 1,329,324 0 1,329,324 1,329,324 2.4%
Flagship Pioneering, Inc. 0 22,240,723 0 22,240,723 22,240,723 40.2%
Noubar Afeyan 0 29,225,579 0 29,225,579 29,225,579 52.8%
Filing





If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. Checkbox not checked

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).






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SCHEDULE 13D

 
Flagship V VentureLabs Rx Fund, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Manager of General Partner
Date:02/05/2025
 
Flagship Ventures Fund V, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Manager of General Partner
Date:02/05/2025
 
Flagship Ventures Fund V General Partner LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager of General Partner
Date:02/05/2025
 
Flagship Pioneering Fund VI, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager of General Partner
Date:02/05/2025
 
Flagship Pioneering Fund VI General Partner LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager of General Partner
Date:02/05/2025
 
Nutritional Health LTP Fund, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager of General Partner
Date:02/05/2025
 
Nutritional Health LTP Fund General Partner LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager of General Partner
Date:02/05/2025
 
Flagship Pioneering Special Opportunities Fund II, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager of General Partner
Date:02/05/2025
 
Flagship Pioneering Special Opportunities Fund II General Partner LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Manager
Date:02/05/2025
 
FPN, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager
Date:02/05/2025
 
FPN General Partner LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager
Date:02/05/2025
 
Flagship VentureLabs V, LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager
Date:02/05/2025
 
Flagship VentureLabs V Manager LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager
Date:02/05/2025
 
Flagship Pioneering Fund VII, L.P.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager
Date:02/05/2025
 
Flagship Pioneering Fund VII General Partner LLC
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer of Manager
Date:02/05/2025
 
Flagship Pioneering, Inc.
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D., Chief Executive Officer
Date:02/05/2025
 
Noubar Afeyan
 
Signature:/s/ Noubar B. Afeyan, Ph.D.
Name/Title:Noubar B. Afeyan, Ph.D.
Date:02/05/2025