Among active 13F managers last quarter, 10 opened and 12 added, while 9 reduced; the largest holder to move was Siren, L.L.C. (+14%). No open-market insider trades in the last 180 days.
Funds lean in and no leg opposes.
60 tracked 13F filers disclose a position in SLN as of the latest SEC 13F filings, a combined $186.9M 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 | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Siren, L.L.C. | 3.3M | $36.4M | ▲+14% Added · +400K sh | Q2 2026 | |
| 2 | TCG Crossover Management, LLC | 3.0M | $33.3M | —Held | Q2 2026 | |
| 3 | Redmile Group, LLC | 2.2M | $23.8M | —Held | Q2 2026 | |
| 4 | Nantahala Capital Management, LLC | 1.3M | $14.8M | ▼−37% Reduced · −800K sh | Q2 2026 | |
| 5 | Citadel Advisors LLC | 1.3M | $14.6M | ▲+7.7% Added · +95K sh | Q2 2026 | |
| 6 | Millennium Management LLC | 1.1M | $5.7M | ▲+63% Added · +415K sh | Q1 2026 | |
| 7 | Nextech Invest Ltd. | 952K | $10.5M | —Held | Q2 2026 | |
| 8 | Ikarian Capital, LLC | 831K | Withheld | ▼−4.0% Reduced · −35K sh | Q2 2026 | |
| 9 | Tetragon Partners GP Ltd | 764K | $8.4M | ▲+21% Added · +134K sh | Q2 2026 | |
| 10 | Soleus Capital Management, L.P. | 630K | $6.9M | ▲New +630K sh | Q2 2026 | |
| 11 | 5AM Venture Management, LLC | 476K | $5.2M | —Held | Q2 2026 | |
| 12 | Great Point Partners LLC | 450K | $4.9M | ▼−56% Reduced · −570K sh | Q2 2026 | |
| 13 | Schonfeld Strategic Advisors LLC | 269K | $3.0M | ▲New +269K sh | Q2 2026 | |
| 14 | UBS Group AG | 247K | $1.3M | ▲+19% Added · +39K sh | Q1 2026 | |
| 15 | BlackRock, Inc. | 220K | $2.4M | ▲+7.4% Added · +15K sh | Q2 2026 | |
| 16 | Bank Of Montreal | 203K | $1.1M | ▲+26% Added · +42K sh | Q1 2026 | |
| 17 | Boothbay Fund Management, LLC | 198K | $2.2M | ▼−5.1% Reduced · −11K sh | Q2 2026 | |
| 18 | ADAR1 Capital Management, LLC | 172K | $907K | ▲+628% Added · +149K sh | Q1 2026 | |
| 19 | Marshall Wace, LLP | 170K | $894K | ▲+8.9% Added · +14K sh | Q1 2026 | |
| 20 | Caption Management, LLC | 162K | $1.8M | ▲New +162K sh | Q2 2026 | |
| 21 | BNP Paribas Financial Markets | 148K | $778K | ▲12× Added · +136K sh | Q1 2026 | |
| 22 | HSBC Holdings PLC | 123K | $640K | ▼−29% Reduced · −50K sh | Q1 2026 | |
| 23 | Quadrature Capital Ltd | 118K | $1.3M | ▲Added Added · +118K sh | Q2 2026 | |
| 24 | Susquehanna International Group, LLP | 115K | $608K | ▲+584% Added · +98K sh | Q1 2026 | |
| 25 | XTX Topco Ltd | 106K | $559K | ▲+805% Added · +94K sh | Q1 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. 2 value rows are withheld because the reported units disagree with same-security peers; share counts are unchanged.
Last quarter, 10 funds opened a new position in SLN and 12 added to an existing one, while 9 reduced. 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 | Their position there |
|---|---|---|
| Cogent Biosciences IncCOGT | 26 funds | $506.8M |
| Annexon IncANNX | 26 funds | $170.4M |
| Insmed IncINSM | 25 funds | $686.6M |
| Nvidia CorpNVDA | 24 funds | $14.9B |
| Eli Lilly & CoLLY | 24 funds | $3.6B |
| Lam Research CorpLRCX | 24 funds | $2.4B |
| Cytokinetics IncCYTK | 24 funds | $315.3M |
| Acadia Pharmaceuticals IncACAD | 24 funds | $153.3M |
| Mineralys Therapeutics IncMLYS | 24 funds | $116.4M |
| Amazon.com IncAMZN | 23 funds | $10.3B |
| Revolution Medicines IncRVMD | 23 funds | $2.2B |
| Intel CorpINTC | 23 funds | $2.1B |
Ranked by how many of SLN's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in SLN.
No open-market insider transactions on file yet. Grants, gifts, and exercises live on the full insider page.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 22 | 14 | – |
Insiders Form 4 open-market | 0 | 0 | $0 |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
Connected entities for SLN
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/SLN/capital-change-brief"
Use Arkolith's capital_change_brief for SLN. 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 SLN. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.