Bain Capital Life Sciences Investors, LLC

Ten-percent owner · RPID, HTFL, KLRA, SLDB, OLMA, NAMS

As of 2026-09-16, Bain Capital Life Sciences Investors, LLC has 65 Form 4 transactions on record across 6 companies — 35 in the trailing 12 months.

Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.

Reconstructed holdings

Direct: $0Indirect: $801.5M$801.5Mas of 2026-09-16
  • Direct $0
  • Indirect $801.5M
HTFLindirect8,448,158 sh$408.0M
KLRAindirect21,020,768 sh$267.0M
SLDBindirect6,444,170 sh$56.2M
NAMSindirect1,632,653 sh$34.6M
OLMAindirect3,500,000 sh$34.1M
RPIDindirect1,463,000 sh$1.6M

Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.

Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.

Trades by company

HTFL · 19 trades
2026-04-30: Sale, 892,533 sh ($26.0M)2026-04-30: Sale, 56,224 sh ($1.7M)2026-04-29: Sale, 797,133 sh ($23.4M)2026-04-28: Sale, 254,110 sh ($7.8M)2026-02-04: Sale, 2,000,000 sh ($56.1M)2025-08-11: Conversion, 433,924 sh ($6.6M)2025-08-11: Conversion, 35,081,564 sh ($0)2025-08-11: Conversion2025-08-11: Conversion2025-08-11: Conversion, 12,014,234 sh2025-08-11: Conversion, 12,014,234 sh2025-08-11: Conversion2025-08-11: Conversion, 12,014,234 sh2025-08-11: Conversion2025-08-11: Conversion, 12,014,234 sh2025-08-11: Conversion2025-08-11: Conversion, 12,014,234 sh2025-08-11: Conversion2025-08-11: Conversion, 12,014,234 sh
RPID · 15 trades
2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh2026-05-20: Purchase, 1,463,000 sh
KLRA · 15 trades
2026-04-20: Purchase, 1,562,500 sh ($25.0M)2026-04-20: Conversion, 4,145,768 sh ($0)2026-04-20: Conversion, 16,875,000 sh ($0)2026-04-20: Conversion, 16,875,000 sh2026-04-20: Conversion, 16,875,000 sh2026-04-20: Conversion, 4,145,768 sh2026-04-20: Conversion, 16,875,000 sh2026-04-20: Conversion, 16,875,000 sh2026-04-20: Conversion, 4,145,768 sh2026-04-20: Conversion, 4,145,768 sh2026-04-20: Conversion, 4,145,768 sh2026-04-20: Conversion, 16,875,000 sh2026-04-20: Conversion, 4,145,768 sh2026-04-20: Conversion, 4,145,768 sh2026-04-20: Conversion, 16,875,000 sh
OLMA · 13 trades
2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-10: Other acquisition, 3,500,000 sh2025-01-08: Purchase, 300,000 sh ($1.7M)
SLDB · 2 trades
2025-02-19: Purchase, 6,444,170 sh ($26.0M)2025-02-19: Purchase, 1,000,000 sh ($4.0M)
NAMS · 1 trade
2024-12-13: Purchase, 1,632,653 sh ($40.0M)

Filing ledger

DateCompanyActionShares @ priceValueOwnership ΔOwned afterFiling
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-05-20RPIDPurchase1,463,000—ownership Δ n/a1,463,000Form 4
2026-04-30HTFLSale892,533 @ $29.18$26.0M−9.5% of holding8,504,382Form 4
2026-04-30HTFLSale56,224 @ $30.05$1.7M−0.7% of holding8,448,158Form 4
2026-04-29HTFLSale797,133 @ $29.37$23.4M−7.8% of holding9,396,915Form 4
2026-04-28HTFLSale254,110 @ $30.51$7.8M−2.4% of holding10,194,048Form 4
2026-04-20KLRAPurchase1,562,500 @ $16.00$25.0M+7.4% of holding22,583,268Form 4
2026-02-04HTFLSale2,000,000 @ $28.05$56.1M−16.1% of holding10,448,158Form 4
2025-02-19SLDBPurchase6,444,170 @ $4.03$26.0Mownership Δ n/a6,444,170Form 4
2025-02-19SLDBPurchase1,000,000 @ $4.03$4.0M+24.8% of holding5,034,582Form 4
2025-01-08OLMAPurchase300,000 @ $5.76$1.7M+4.0% of holding7,800,000Form 4
2024-12-13NAMSPurchase1,632,653 @ $24.50$40.0Mownership Δ n/a1,632,653Form 4
40 award / exercise / gift records — not counted as purchases
DateCompanyActionSharesOwned afterFiling
2026-04-20KLRAConversion4,145,7680Form 4
2026-04-20KLRAConversion16,875,0000Form 4
2026-04-20KLRAConversion16,875,00016,875,000Form 4
2026-04-20KLRAConversion16,875,00016,875,000Form 4
2026-04-20KLRAConversion4,145,76821,020,768Form 4
2026-04-20KLRAConversion16,875,00016,875,000Form 4
2026-04-20KLRAConversion16,875,00016,875,000Form 4
2026-04-20KLRAConversion4,145,76821,020,768Form 4
2026-04-20KLRAConversion4,145,76821,020,768Form 4
2026-04-20KLRAConversion4,145,76821,020,768Form 4
2026-04-20KLRAConversion16,875,00016,875,000Form 4
2026-04-20KLRAConversion4,145,76821,020,768Form 4
2026-04-20KLRAConversion4,145,76821,020,768Form 4
2026-04-20KLRAConversion16,875,00016,875,000Form 4
2025-08-11HTFLConversion433,92412,448,158Form 4
2025-08-11HTFLConversion35,081,5640Form 4
2025-08-11HTFLConversion—0Form 4
2025-08-11HTFLConversion—0Form 4
2025-08-11HTFLConversion12,014,23412,014,234Form 4
2025-08-11HTFLConversion12,014,23412,014,234Form 4
2025-08-11HTFLConversion—0Form 4
2025-08-11HTFLConversion12,014,23412,014,234Form 4
2025-08-11HTFLConversion—0Form 4
2025-08-11HTFLConversion12,014,23412,014,234Form 4
2025-08-11HTFLConversion—0Form 4
2025-08-11HTFLConversion12,014,23412,014,234Form 4
2025-08-11HTFLConversion—0Form 4
2025-08-11HTFLConversion12,014,23412,014,234Form 4
2025-01-10OLMAOther acquisition3,500,0004,300,000Form 4
2025-01-10OLMAOther acquisition3,500,0004,300,000Form 4
2025-01-10OLMAOther acquisition3,500,0004,300,000Form 4
2025-01-10OLMAOther acquisition3,500,0003,500,000Form 4
2025-01-10OLMAOther acquisition3,500,0003,500,000Form 4
2025-01-10OLMAOther acquisition3,500,0004,300,000Form 4
2025-01-10OLMAOther acquisition3,500,0003,500,000Form 4
2025-01-10OLMAOther acquisition3,500,0003,500,000Form 4
2025-01-10OLMAOther acquisition3,500,0004,300,000Form 4
2025-01-10OLMAOther acquisition3,500,0003,500,000Form 4
2025-01-10OLMAOther acquisition3,500,0004,300,000Form 4
2025-01-10OLMAOther acquisition3,500,0003,500,000Form 4

Source: SEC Form 4 filings. Each row links to its original filing.

Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.