What is SEC Form 13F? Ultimate Guide to Institutional Equity Filings
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
CIK: 0001703031
Total reported value
$1.7B
$1.7B
24 檔
28.0%
In Q1 2025, Bain Capital Life Sciences Investors, LLC's U.S. equity holdings reached a combined market value of $1.7B, distributed across 24 disclosed stock positions.
Bain Capital Life Sciences Investors, LLC executed strategic sector rebalancing during Q1 2025, establishing 16 new positions while fully exiting 22 holdings and trimming 3 positions.
| # | Ticker | Issuer | Asset Subclass | Weight | Weight Change | Shares Change | 4Q Trend |
|---|---|---|---|---|---|---|---|
| 1 | NAMS | NewAmsterdam Pharma Company N.V. | Stock-Other | 32.46% | -13.42% | — | |
| 2 | NUVL | Nuvalent Inc-a | Stock-Other | 15.19% | — | — | |
| 3 | PHVS | Pharvaris N.V. | Stock-Other | 7.67% | -1.32% | — | |
| 4 | IRON | Disc Medicine Inc | Stock-Other | 7.22% | -0.20% | — | |
| 5 | DNTH | Dianthus Therapeutics Inc | Stock-Other | 7.22% | -0.64% | — | |
| 6 | SVRA | Savara Inc | Stock-Other | 7.21% | -2.22% | +20.84% | |
| 7 | SLDB | Solid Biosciences Inc | Stock-Other | 4.33% | -0.54% | +96.10% | |
| 8 | OLMA | Olema Pharmaceuticals Inc | Stock-Other | 3.81% | -4.78% | -8.38% | |
| 9 | RPID | Rapid Micro Biosystems Inc-a | Stock-Other | 3.29% | -0.86% | — | |
| 10 | CDTX | Cidara Therapeutics Inc | Stock-Other | 2.24% | — | — | |
| 11 | UPB | Upstream Bio Inc | Stock-Other | 2.08% | -0.45% | — | |
| 12 | ANNX | Annexon Inc | Stock-Other | 1.50% | -1.09% | — | |
| 13 | AVIR | Atea Pharmaceuticals Inc | Stock-Other | 1.10% | -0.58% | — | |
| 14 | KYTX | Kyverna Therapeutics Inc | Stock-Other | 0.96% | -0.89% | — | |
| 15 | ASNSUSD | X4 Pharmaceuticals Inc | Stock-Other | 0.59% | — | — | |
| 16 | CABA | Cabaletta Bio Inc | Stock-Other | 0.57% | +0.84% | — | |
| 17 | TNGX | Tango Therapeutics Inc | Stock-Other | 0.55% | — | — | |
| 18 | ✓ | Xilio Therapeutics Inc | Stock-Other | 0.49% | — | — | |
| 19 | ✓ | Mersana Therapeutics Inc | Stock-Other | 0.44% | — | — | |
| 20 | IPSC | Century Therapeutics Inc | Stock-Other | 0.38% | — | — | |
| 21 | CCCC | C4 Therapeutics Inc | Stock-Other | 0.26% | +0.29% | — | |
| 22 | IVVD | Invivyd Inc | Stock-Other | 0.16% | — | — | |
| 23 | NAUT | Nautilus Biotechnology Inc | Stock-Other | 0.14% | — | -39.03% | |
| 24 | ✓ | Newamsterdam Pharma Company | Stock-Other | 0.13% | -0.05% | — |
| # | Ticker | Issuer | Weight Change | Shares Change | Action |
|---|---|---|---|---|---|
| 1 | SVRA | Savara Inc | +5.9% | +20.84% | Add |
| 2 | PHVS | Pharvaris N.V. | +3.8% | — | Add |
| 3 | ASNSUSD | X4 Pharmaceuticals Inc | -0.3% | — | Add |
| 4 | NAUT | Nautilus Biotechnology Inc | -1.2% | -39.03% | Trim |
| 5 | ✓ | Mersana Therapeutics Inc | -2.9% | — | Add |
| 6 | ANNX | Annexon Inc | -3.3% | — | Add |
| 7 | CCCC | C4 Therapeutics Inc | -3.8% | — | Trim |
| 8 | AVIR | Atea Pharmaceuticals Inc | -6.8% | — | Trim |
| 9 | SWTXUSD | Springworks Therapeutics Inc | — | EXIT | Sold out |
| 10 | NAMS | NewAmsterdam Pharma Company N.V. | — | NEW | New buy |
| 11 | DVAX | Dynavax Technologies CORP | — | EXIT | Sold out |
| 12 | DRNAUSD | Dicerna Pharmaceuticals Inc | — | EXIT | Sold out |
| 13 | ARQT | Arcutis Biotherapeutics Inc | — | EXIT | Sold out |
| 14 | NUVL | Nuvalent Inc-a | — | NEW | New buy |
| 15 | IRON | Disc Medicine Inc | — | NEW | New buy |
| 16 | DNTH | Dianthus Therapeutics Inc | — | NEW | New buy |
| 17 | NRIX | Nurix Therapeutics Inc | — | EXIT | Sold out |
| 18 | CRNX | Crinetics Pharmaceuticals In | — | EXIT | Sold out |
| 19 | SYRSEUR | Syros Pharmaceuticals Inc | — | EXIT | Sold out |
| 20 | SLDB | Solid Biosciences Inc | — | NEW | New buy |
| 21 | SLDB | Solid Biosciences Inc. | — | EXIT | Sold out |
| 22 | OLMA | Olema Pharmaceuticals Inc | — | NEW | New buy |
| 23 | MRNS* | Marinus Pharmaceuticals Inc | — | EXIT | Sold out |
| 24 | ✓ | Aptinyx Inc | — | EXIT | Sold out |
| 25 | KYMR | Kymera Therapeutics Inc | — | EXIT | Sold out |
| 26 | RPID | Rapid Micro Biosystems Inc-a | — | NEW | New buy |
| 27 | AGLEUSD | Aeglea Biotherapeutics Inc | — | EXIT | Sold out |
| 28 | ✓ | — | EXIT | Sold out | |
| 29 | CDTX | Cidara Therapeutics Inc | — | NEW | New buy |
| 30 | UPB | Upstream Bio Inc | — | NEW | New buy |
| 31 | ✓ | Bctg Acquisition CORP | — | EXIT | Sold out |
| 32 | ✓ | Research Alliance CORP Ii | — | EXIT | Sold out |
| 33 | ✓ | Arya Sciences Acqu CORP Iv | — | EXIT | Sold out |
| 34 | KYTX | Kyverna Therapeutics Inc | — | NEW | New buy |
| 35 | ✓ | Bcls Acquisition CORP | — | EXIT | Sold out |
| 36 | ✓ | Panacea Acquisition CORP Ii | — | EXIT | Sold out |
| 37 | ✓ | Omega Alpha Spac | — | EXIT | Sold out |
| 38 | CABA | Cabaletta Bio Inc | — | NEW | New buy |
| 39 | TNGX | Tango Therapeutics Inc | — | NEW | New buy |
| 40 | ✓ | Xilio Therapeutics Inc | — | NEW | New buy |
| 41 | ✓ | Frazier Lifesciences Acqu Co | — | EXIT | Sold out |
| 42 | ✓ | Jiya Acquisition CORP | — | EXIT | Sold out |
| 43 | ✓ | Moonlake Immunotherapeutics | — | EXIT | Sold out |
| 44 | IPSC | Century Therapeutics Inc | — | NEW | New buy |
| 45 | IVVD | Invivyd Inc | — | NEW | New buy |
| 46 | ✓ | Newamsterdam Pharma Company | — | NEW | New buy |
According to official SEC Form 13F filings, Bain Capital Life Sciences Investors, LLC reported a total U.S. public equity portfolio value of $1.7B across 24 disclosed positions in Q1 2025.
Expert Analysis & Guides for Tracking Wall Street Smart Money Movements
Learn how SEC Form 13F filings work, the $100M threshold, 45-day reporting lag, and how to track top hedge fund holdings.
In terms of portfolio concentration, the top 5 core holdings (including NAMS, NUVL, PHVS) accounted for 28.0% of total reported equity market value during Q1 2025.
Top New Position Initiated
NAMS
市值: $219.4M
Top Position Liquidated / Trimmed
SWTXUSD
前期市值: $480.6M
During Q1 2025, Bain Capital Life Sciences Investors, LLC's top holdings by market value included NAMS (32.5%)、NUVL (15.2%)、PHVS (7.7%). The largest single position, NAMS, represented 32.5% of total portfolio value.
In Q1 2025, Bain Capital Life Sciences Investors, LLC made 46 total portfolio adjustments, initiating 16 new buys, adding to 5 positions, trimming 3 holdings, and fully liquidating 22 stocks.
All holding records on this page are fetched directly from the U.S. Securities and Exchange Commission (SEC) EDGAR system (Form 13F-HR). AlphaSMO parses CUSIP identifiers and formats data into Schema.org-compliant datasets.
Understand SEC Form 4 insider disclosures for corporate officers, directors, and 10% owners to track executive transactions.
Understand Rule 144 restricted stock sale notices to spot planned insider liquidations before market sell pressure arrives.
Explore the 5% beneficial ownership threshold, 13D vs 13G filing differences, and recent SEC accelerated deadline rules.
Best practices for analyzing 13F quarterly changes without getting misled by stock splits, options, or market valuation drift.
Learn how AlphaSMO's flagship signal detects high-conviction stocks where 13F hedge funds and corporate insiders buy at the same time.