First seen by DFX
Sep 13, 2026
date not stated
Bain Capital Life Sciences Investors, LLC: CANDIDATE_FAMILY_OFFICE -> NOT_FAMILY_OFFICE (Bain Capital Life Sciences is the life sciences investing arm of Bain Capital, an institutional private investment firm with outside fund commitments.)
First seen by DFX
Sep 12, 2026
date not stated
Bain Capital Life Sciences Investors, LLC files Form 13F (non_adviser_filer, $1,305,660,829 in 19 positions)
Bain Capital Life Sciences Investors, LLC reported $1,108,816,309 across 20 13(f) positions for the quarter ended 2026-03-31
Bain Capital Life Sciences Investors, LLC reduced Dianthus Therapeutics Inc 743,592 -> 362,470 shares ($30,643,426 -> $30,418,482)
Bain Capital Life Sciences Investors, LLC reduced Upstream Bio Inc 1,329,544 -> 867,211 shares ($36,097,120 -> $7,804,899)
Bain Capital Life Sciences Investors, LLC exited Mersana Therapeutics Inc (was $10,025,547, 346,545 shares)
Bain Capital Life Sciences Investors, LLC exited Tango Therapeutics Inc (was $5,789,948, 653,493 shares)
Bain Capital Life Sciences Investors, LLC exited Xilio Therapeutics Inc (was $4,719,994, 7,372,686 shares)
Bain Capital Life Sciences Investors, LLC opened a $21,569,600 position in Alkermes Plc (610,000 shares)
Bain Capital Life Sciences Investors, LLC opened a $25,222,200 position in Centessa Pharmaceuticals (635,000 shares)
Bain Capital Life Sciences Investors, LLC opened a $9,030,502 position in Disc Medicine Inc (141,234 shares)
Bain Capital Life Sciences Investors, LLC opened a $5,584,417 position in Xilio Therapeutics Inc (664,021 shares)
Bain Capital Life Sciences Investors, LLC reported $1,305,660,829 across 19 13(f) positions for the quarter ended 2025-12-31
Bain Capital Life Sciences Investors, LLC increased C4 Therapeutics Inc 1,111,910 -> 7,171,910 shares ($2,468,440 -> $13,698,348)
Bain Capital Life Sciences Investors, LLC increased X4 Pharmaceuticals Inc 2,436,588 -> 7,967,454 shares ($8,333,131 -> $31,869,816)
Bain Capital Life Sciences Investors, LLC increased Xilio Therapeutics Inc 4,566,817 -> 7,372,686 shares ($3,848,457 -> $4,719,994)
Bain Capital Life Sciences Investors, LLC reduced Dianthus Therapeutics Inc 1,315,892 -> 743,592 shares ($51,780,350 -> $30,643,426)
Bain Capital Life Sciences Investors, LLC reduced Newamsterdam Pharma Company 10,719,110 -> 7,306,566 shares ($304,851,488 -> $256,314,335)
Bain Capital Life Sciences Investors, LLC reduced Tango Therapeutics Inc 2,712,008 -> 653,493 shares ($22,780,867 -> $5,789,948)
Bain Capital Life Sciences Investors, LLC reduced Upstream Bio Inc 2,439,538 -> 1,329,544 shares ($45,887,710 -> $36,097,120)
Bain Capital Life Sciences Investors, LLC exited Cidara Therapeutics Inc (was $289,290,002, 3,020,990 shares)
Bain Capital Life Sciences Investors, LLC reported $1,506,676,329 across 21 13(f) positions for the quarter ended 2025-09-30
Bain Capital Life Sciences Investors, LLC increased X4 Pharmaceuticals Inc 563,859 -> 2,436,588 shares ($1,071,332 -> $8,333,131)
Bain Capital Life Sciences Investors, LLC reduced Century Therapeutics Inc 5,410,361 -> 3,538,609 shares ($3,022,769 -> $1,762,227)
Bain Capital Life Sciences Investors, LLC reduced Dianthus Therapeutics Inc 2,482,250 -> 1,315,892 shares ($46,244,318 -> $51,780,350)
Bain Capital Life Sciences Investors, LLC opened a $419,004,998 position in Heartflow Inc (12,448,158 shares)
Bain Capital Life Sciences Investors, LLC opened a $2,689,189 position in Mersana Therapeutics Inc (346,545 shares)
Bain Capital Life Sciences Investors, LLC exited Disc Medicine Inc (was $30,902,160, 583,500 shares)
Bain Capital Life Sciences Investors, LLC exited Mersana Therapeutics Inc (was $2,564,447, 8,663,673 shares)
Bain Capital Life Sciences Investors, LLC exited Nuvalent Inc (was $110,426,472, 1,447,267 shares)
Bain Capital Life Sciences Investors, LLC reported $799,265,446 across 23 13(f) positions for the quarter ended 2025-06-30
Bain Capital Life Sciences Investors, LLC exited X4 Pharmaceuticals Inc (was $3,998,891, 16,915,784 shares)
Bain Capital Life Sciences Investors, LLC increased Cabaletta Bio Inc 2,760,888 -> 9,677,125 shares ($3,823,830 -> $14,709,230)
Bain Capital Life Sciences Investors, LLC increased Cidara Therapeutics Inc 703,080 -> 2,500,680 shares ($15,144,343 -> $121,808,123)
Bain Capital Life Sciences Investors, LLC reduced Disc Medicine Inc 983,500 -> 583,500 shares ($48,820,940 -> $30,902,160)
Bain Capital Life Sciences Investors, LLC reported $675,912,941 across 24 13(f) positions for the quarter ended 2025-03-31
Bain Capital Life Sciences Investors, LLC increased Solid Biosciences Inc 4,034,582 -> 7,911,669 shares ($16,138,328 -> $29,273,175)
Bain Capital Life Sciences Investors, LLC reduced Nautilus Biotechnology Inc 1,759,000 -> 1,072,421 shares ($2,955,120 -> $923,354)
Bain Capital Life Sciences Investors, LLC reported $850,096,624 across 26 13(f) positions for the quarter ended 2024-12-31