Investor · PITTSBURGH, PA
Robert Langer
Open Robert in the network graph →Filings
380
SEC Form D
Connections
1,293
co-filers
Capital
$567.0M
across filings
Active
Mar 2009
to Oct 2025
Most-connected co-filers (1,293)
Peter B. Hutt · CAMBRIDGE, MA136 sharedLee Babiss · Cambridge, MA117 sharedPeder D. Prahl · London, United Kingdom114 sharedCarl Hansen · St Helier, Channel Islands, Y9114 sharedRobert Carpenter · Cambridge, MA99 sharedThomas W. Blumenthal · BOSTON, MA88 sharedSeth A. Klarman · BOSTON, MA88 sharedJoshua A. Greenhill · BOSTON, MA88 sharedJames F. Mooney Iii · BOSTON, MA88 sharedElaine F. Mann · BOSTON, MA88 sharedGregory A. Ciongoli · BOSTON, MA80 sharedCarsten D. Koppen · St Helier, Y980 sharedGeorge A. Rizk · BOSTON, MA80 sharedSteven G. Mandis · Bethesda, MD72 sharedFrederick A. Fogel · BOSTON, MA72 sharedLars Frankfelt · St Helier, Channel Islands, Y964 sharedNoubar Afeyan · CAMBRIDGE, MA54 sharedAllison Armstrong · Scotts Valley, CA50 sharedLynn Vojvodich · San Francisco, CA50 sharedPhilip Lawson · Tiburon, CA50 sharedJason F. Price · BOSTON, MA50 sharedMichael A. Sperling · BOSTON, MA50 sharedSyed Ali · San Francisco, CA50 sharedAlan Crane · MEDFORD, MA42 shared
Recent filings (380)
EpiBone, Inc.Oct 2025 · 9 co-filers$4.3MEpiBone, Inc.Oct 2025 · 9 co-filers$4.3MVitaKey Inc.Aug 2025 · 19 co-filers$43.5MVitaKey Inc.Aug 2025 · 19 co-filers$43.5MBG Co-Investment 2024, L.L.C.Mar 2025 · 33 co-filers$221.7MBAUPOST VALUE PARTNERS LP IIIMar 2025 · 33 co-filersBAUPOST LTD PARTNERSHIP 1983 B-1Mar 2025 · 33 co-filersBAUPOST LTD PARTNERSHIP 1983 A-1Mar 2025 · 33 co-filersBAUPOST VALUE PARTNERS LP IVMar 2025 · 33 co-filersBAUPOST LTD PARTNERSHIP 1983 C-1Mar 2025 · 33 co-filersBAUPOST VALUE PARTNERS LP 1Mar 2025 · 33 co-filersBAUPOST VALUE PARTNERS LP IIMar 2025 · 33 co-filers13D Activist Fund LPJan 2025 · 2 co-filersNoveome Biotherapeutics, Inc.Aug 2024 · 23 co-filers$51.3MBAUPOST VALUE PARTNERS LP IIMar 2024 · 37 co-filersBAUPOST VALUE PARTNERS LP IVMar 2024 · 37 co-filersBAUPOST LTD PARTNERSHIP 1983 B-1Mar 2024 · 37 co-filersBAUPOST LTD PARTNERSHIP 1983 A-1Mar 2024 · 37 co-filersBAUPOST VALUE PARTNERS LP 1Mar 2024 · 37 co-filersBAUPOST LTD PARTNERSHIP 1983 C-1Mar 2024 · 37 co-filersBAUPOST VALUE PARTNERS LP IIIMar 2024 · 37 co-filers13D Activist Fund LPJan 2024 · 2 co-filersOmnipulse Biosciences, Inc.Jan 2024 · 11 co-filers$12.5MOmnipulse Biosciences, Inc.Jan 2024 · 11 co-filers$12.5MLyndra Therapeutics, Inc.Dec 2023 · 29 co-filers$206.1M
Derived from public SEC Form D (Reg D) filings; entities resolved probabilistically. See Robert in the interactive graph →