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Form 3 - Initial statement of beneficial ownership of securities:
SEC Accession No. 0001104659-18-045601
Filing Date
2018-07-17
Accepted
2018-07-17 20:49:43
Documents
1
Period of Report
2018-07-17

Document Format Files

Seq Description Document Type Size
1 3 a3.html 3  
1 3 a3.xml 3 26615
  Complete submission text file 0001104659-18-045601.txt   32026
Mailing Address 1 SUNSET RIDGE LEXINGTON MA 02173
Business Address
AFEYAN NOUBAR (Reporting) CIK: 0001222012 (see all company filings)

Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957566

Mailing Address
Business Address
KANIA EDWIN M JR (Reporting) CIK: 0001255927 (see all company filings)

Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957565

Mailing Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02142
Business Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02142 617-868-1888
Flagship Ventures Fund IV, L.P. (Reporting) CIK: 0001503559 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957571

Mailing Address 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142
Business Address 55 CAMBRIDGE PARKWAY, SUITE 800E CAMBRIDGE MA 02142 617-868-1888
Flagship Ventures Fund IV General Partner LLC (Reporting) CIK: 0001508051 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957573

Mailing Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02142
Business Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02142 617-868-1888
Flagship Ventures Fund IV-Rx, L.P. (Reporting) CIK: 0001590973 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957570

Mailing Address ONE MEMORIAL DRIVE, 7TH FLOOR CAMBRIDGE MA 02142
Business Address ONE MEMORIAL DRIVE, 7TH FLOOR CAMBRIDGE MA 02142 617-868-1888
Flagship Ventures Fund V, L.P. (Reporting) CIK: 0001627639 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957569

Mailing Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02143
Business Address 55 CAMBRIDGE PARKWAY, 8TH FLOOR CAMBRIDGE MA 02143 617-868-1888
Flagship VentureLabs IV, LLC (Reporting) CIK: 0001642578 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957572

Mailing Address ONE MEMORIAL DRIVE 7TH FLOOR CAMBRIDGE MA 02142
Business Address ONE MEMORIAL DRIVE 7TH FLOOR CAMBRIDGE MA 02142 617-868-1888
Flagship Ventures Opportunities Fund I, L.P. (Reporting) CIK: 0001677345 (see all company filings)

State of Incorp.: DE | Fiscal Year End: 1231
Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957567

Mailing Address 325 VASSAR STREET, SUITE 1A CAMBRIDGE MA 02139
Business Address 325 VASSAR STREET, SUITE 1A CAMBRIDGE MA 02139 617-679-9600
Rubius Therapeutics, Inc. (Issuer) CIK: 0001709401 (see all company filings)

IRS No.: 042688109 | State of Incorp.: DE | Fiscal Year End: 1231
SIC: 2836 Biological Products, (No Diagnostic Substances)

Mailing Address 55 CAMBRIDGE PARKWAY SUITE 800E CAMBRIDGE MA 02142
Business Address 55 CAMBRIDGE PARKWAY SUITE 800E CAMBRIDGE MA 02142 617-868-1888
Flagship V VentureLabs Rx Fund, L.P. (Reporting) CIK: 0001724939 (see all company filings)

Type: 3 | Act: 34 | File No.: 001-38586 | Film No.: 18957568