Bain Capital Life Sciences Investors, LLC

CIK 0001703031 · Q1 2026

13F Equity AUM

$1.1B

-15.1% QoQ

Positions

+1 QoQ

AUM Rank

#2,628

Top 21%

Skill Alpha (FF)

+6.1%/yr^ns

No Clear Edge

Rank #519 · Top 6%

vs S&P -11.2%/yr (unadj.)

Quarters Tracked

~8 years

Portfolio Concentration

Top 5: 69.5%Top 10: 86.7%Top 20: 100.0%

HTFL22.9%

NEWAMSTERDAM PHARMA COMPANY21.1%

OLMA10.1%

YB4P8.7%

PHVS6.8%

SLDB6.4%

XFOR3.0%

DNTH2.7%

ANNX2.6%

KYTX2.4%

Others (10)13.3%

HHI (Herfindahl-Hirschman Index) measures portfolio concentration. Low (<1500) = diversified, Moderate (1500-2500), High (>2500) = concentrated bets.

Sector Allocation

Healthcare78.2%

Unclassified21.8%

Portfolio weight by GICS sector based on latest 13F filing. Sectors below 2% are grouped as “Other.”

Position Sizing

Positions: 20Median: 2.38%Avg: 5.00%

0–0.5%

1(0.2%)

0.5–1%

3(2.0%)

1–3%

10(21.9%)

3–5%

0(0.0%)

5%+

6(75.9%)

Count of positions per weight bucket — (%) = combined portfolio weight

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Portfolio Overlap

Shared: 18Unique: 2vs 20 funds

0.2%Low

Fund positions

7,299

Consensus CUSIPs

Jaccard similarity of this fund’s portfolio vs the consensus of top 20 funds by AUM. Low (<15%) = contrarian, Moderate (15-40%), High (>40%) = follows the crowd.

Most Similar Funds

Top 9 benchmark funds with highest portfolio overlap (Jaccard similarity)

BlackRock, Inc.

0.4%

MORGAN STANLEY

0.3%

GEODE CAPITAL MANAGEMENT, LLC

0.5%

VANGUARD CAPITAL MANAGEMENT LLC

0.4%

STATE STREET CORP

0.4%

FMR LLC

0.4%

JPMORGAN CHASE & CO

0.2%

BANK OF AMERICA CORP /DE/

0.3%

VANGUARD PORTFOLIO MANAGEMENT LLC

0.4%

Jaccard similarity per fund: shared CUSIPs / (fund A + fund B − shared). Higher values indicate more similar portfolios.

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Position Changes This Quarter

New4Increased1Decreased7Exited3

New Positions

CNTA2.3%

+635K

ALKS1.9%

+610K

IRON0.8%

+141K

XILIO THERAPEUTICS I…0.5%

+664K

Increased

SLDB6.4%

+1.9M(+24%)

Decreased

HTFL22.9%

-2,000,000(-16%)

OLMA10.1%

-1,035,403(-12%)

UPB0.7%

-462,333(-35%)

DNTH2.7%

-381,122(-51%)

PHVS6.8%

-126,572(-5%)

AVIR1.1%

-125,000(-5%)

ANNX2.6%

-36,395(-1%)

Exited

MRSN

-346,545

TNGX

-653,493

XLO

-7,372,686

Quarter-over-quarter changes compared to prior 13F filing. New = first appearance; Exited = no longer held.

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Holdings

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