22 tracked 13F filers disclose a position in PBLS as of the latest SEC 13F filings, a combined $741.8M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | ARCH Venture Management, LLC | $175.5M | 6.4M | ▲New +6.4M sh | Q2 2026 | |
| 2 | Alphabet Inc. | $134.6M | 4.9M | ▲New +4.9M sh | Q2 2026 | |
| 3 | REGENERON PHARMACEUTICALS, INC. | $114.0M | 4.2M | ▲New +4.2M sh | Q2 2026 | |
| 4 | Siren, L.L.C. | $81.9M | 3.0M | ▲New +3.0M sh | Q2 2026 | |
| 5 | Frazier Life Sciences Management, L.P. | $52.6M | 1.9M | ▲New +1.9M sh | Q2 2026 | |
| 6 | General Catalyst Group Management, LLC | $43.8M | 1.6M | ▲New +1.6M sh | Q2 2026 | |
| 7 | GENERAL ATLANTIC, L.P. | $42.1M | 1.5M | ▲New +1.5M sh | Q2 2026 | |
| 8 | Soleus Capital Management, L.P. | $40.1M | 1.5M | ▲New +1.5M sh | Q2 2026 | |
| 9 | Catalio Capital Management, LP | $22.6M | 824K | ▲New +824K sh | Q2 2026 | |
| 10 | Rock Springs Capital Management LP | $15.8M | 578K | ▲New +578K sh | Q2 2026 | |
| 11 | Bellevue Group AG | $13.7M | 500K | ▲New +500K sh | Q2 2026 | |
| 12 | GEODE CAPITAL MANAGEMENT, LLC | $2.7M | 99K | ▲New +99K sh | Q2 2026 | |
| 13 | WINTON GROUP Ltd | $955K | 35K | ▲New +35K sh | Q2 2026 | |
| 14 | Ghisallo Capital Management LLC | $547K | 20K | ▲New +20K sh | Q2 2026 | |
| 15 | Vanguard Personalized Indexing Management, LLC | $321K | 12K | ▲New +12K sh | Q2 2026 | |
| 16 | ExodusPoint Capital Management, LP | $265K | 10K | ▲New +10K sh | Q2 2026 | |
| 17 | Persistent Asset Partners Ltd | $113K | 4K | ▲New +4K sh | Q2 2026 | |
| 18 | China Universal Asset Management Co., Ltd. | $44K | 2K | ▲New +2K sh | Q2 2026 | |
| 19 | Rialto Wealth Management, LLC | $14K | 508 | ▲New +508 sh | Q2 2026 | |
| 20 | Bell Investment Advisors, Inc | $12K | 451 | ▲New +451 sh | Q2 2026 | |
| 21 | Physician Wealth Advisors, Inc. | $2K | 59 | ▲New +59 sh | Q2 2026 | |
| 22 | Cornerstone Financial Management LLC | $794 | 29 | ▲New +29 sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 17 funds opened a new position in PBLS, while 0 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| CYTOKINETICS INCCYTK | 11 funds | $219.9M |
| ERASCA INCERAS | 10 funds | $874.7M |
| REVOLUTION MEDICINES INCRVMD | 10 funds | $670.1M |
| AMAZON.COM INCAMZN | 9 funds | $741.4M |
| TREVI THERAPEUTICS INCTRVI | 9 funds | $249.4M |
| ORUKA THERAPEUTICS INCORKA | 9 funds | $203.1M |
| UNITEDHEALTH GROUP INCUNH | 9 funds | $139.3M |
| NVIDIA CORPNVDA | 8 funds | $417.4M |
| BRIDGEBIO PHARMA INCBBIO | 8 funds | $267.7M |
| TANGO THERAPEUTICS INCTNGX | 8 funds | $260.2M |
| UNITED THERAPEUTICS CORPUTHR | 8 funds | $237.6M |
| INSMED INCINSM | 8 funds | $208.3M |
Ranked by how many of PBLS's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| Jul 22, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 47K | $1.4M |
| Jul 21, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 22K | $607K |
| Jul 21, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 7K | $190K |
| Jul 21, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 38K | $1.1M |
| Jul 20, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 98K | $2.7M |
| Jul 20, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 33K | $914K |
| Jun 15, 2026 | SEBULSKY ALAN | Director | Buy (P) | 5K | $130K |
| Jun 15, 2026 | SEBULSKY ALAN | Director | Buy (P) | 4K | $110K |
| Jun 12, 2026 | SEBULSKY ALAN | Director | Buy (P) | 8K | $233K |
| Jun 11, 2026 | SEBULSKY ALAN | Director | Buy (P) | 13K | $250K |
| Jun 11, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 19.7M | $394.6M |
| Jun 11, 2026 | RA CAPITAL MANAGEMENT, L.P. | Director, 10% Owner | Buy (P) | 1.5M | $29.2M |
Connected entities for PBLS
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/PBLS/capital-change-brief"
Use Arkolith's capital_change_brief for PBLS. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for PBLS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.