Bain Capital Life Sciences Investors, LLC Historic Quarter Change: USA Stocks, New

Bain Capital Life Sciences Investors, LLC historic quarter change: USA Stocks, New

In share positions in stocks (listed in the US), over 10 quarters from 2023-12-31 to 2026-06-30, Bain Capital Life Sciences Investors, LLC opened 15 positions, added to 24, reduced 48 and sold out of 16.

Q2 2026: Stock KLRA; Country of operation United States; Class COMMON STOCK; Shares before 0.
Q2 2026: Stock COAG; Country of operation United States; Class COM SHS; Shares before 0.
Q1 2026: Stock ALKS; Country of operation —; Class SHS; Shares before 0.
Q1 2026: Stock IRON; Country of operation United States; Class COM; Shares before 0.

Each consecutive pair of Form 13F-HR filings compared (SEC CIK 1703031), 10 quarters: Q2 2026 (2026-03-31 to 2026-06-30, filed 2026-08-14); Q1 2026 (2025-12-31 to 2026-03-31, filed 2026-05-15); Q4 2025 (2025-09-30 to 2025-12-31, filed 2026-02-17); Q3 2025 (2025-06-30 to 2025-09-30, filed 2025-11-14); Q2 2025 (2025-03-31 to 2025-06-30, filed 2025-08-14); Q1 2025 (2024-12-31 to 2025-03-31, filed 2025-05-15); Q4 2024 (2024-09-30 to 2024-12-31, filed 2025-02-14); Q3 2024 (2024-06-30 to 2024-09-30, filed 2024-11-14); Q2 2024 (2024-03-31 to 2024-06-30, filed 2024-08-12); Q1 2024 (2023-12-31 to 2024-03-31, filed 2024-05-15). Rows for the same security, class and put/call are added together. Value change is the filed value at each quarter end, so it includes the price move. Only the filings held here are compared; the firm's 13F-HR filings go back to the quarter ended 2017-12-31.

Quarter	Stock	Country of operation	Class	Shares after	Share change	Value before	Value after	Value change	Filed
Q2 2026	KLRA KAILERA THERAPEUTICS INC	United States	COMMON STOCK	22,583,268	+22,583,268	$0	$497,509,394	+$497,509,394	2026-08-14
Q2 2026	COAG HEMAB THERAPEUTICS HOLDINGS INC	United States	COM SHS	1,650,000	+1,650,000	$0	$60,604,500	+$60,604,500	2026-08-14
Q1 2026	ALKS ALKERMES PLC		SHS	610,000	+610,000	$0	$21,569,600	+$21,569,600	2026-05-15
Q1 2026	IRON DISC MEDICINE INC	United States	COM	141,234	+141,234	$0	$9,030,502	+$9,030,502	2026-05-15
Q1 2026	XLO XILIO THERAPEUTICS INC	United States	COM	664,021	+664,021	$0	$5,584,417	+$5,584,417	2026-05-15
Q3 2025	HTFL HEARTFLOW INC	United States	COM	12,448,158	+12,448,158	$0	$419,004,998	+$419,004,998	2025-11-14
Q3 2025	MRSN MERSANA THERAPEUTICS INC	United States	COM	346,545	+346,545	$0	$2,689,189	+$2,689,189	2025-11-14
Q2 2025	XFOR X4 PHARMACEUTICALS INC	United States	COM NEW	563,859	+563,859	$0	$1,071,332	+$1,071,332	2025-08-14
Q4 2024	OLMA OLEMA PHARMACEUTICALS INC	United States	COM	7,470,214	+7,470,214	$0	$43,551,348	+$43,551,348	2025-02-14
Q4 2024	UPB UPSTREAM BIO INC	United States	COM	2,295,322	+2,295,322	$0	$37,735,094	+$37,735,094	2025-02-14
Q3 2024	CDTX CIDARA THERAPEUTICS INC	United States	COM NEW	703,080	+703,080	$0	$7,558,110	+$7,558,110	2024-11-14
Q2 2024	IPSC CENTURY THERAPEUTICS INC	United States	COM	5,410,361	+5,410,361	$0	$13,796,421	+$13,796,421	2024-08-12
Q1 2024	DNTH DIANTHUS THERAPEUTICS INC	United States	COM	2,992,028	+2,992,028	$0	$89,760,840	+$89,760,840	2024-05-15
Q1 2024	KYTX KYVERNA THERAPEUTICS INC	United States	COM	3,163,868	+3,163,868	$0	$78,590,481	+$78,590,481	2024-05-15
Q1 2024	NAMSW NEWAMSTERDAM PHARMA COMPANY		*W EXP 99/99/999	100,000	+100,000	$0	$1,104,000	+$1,104,000	2024-05-15

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