Back to INSM researchManagerReported valueSharesFiling period UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME$199M1.22M2026-03-31American Century Companies Inc$151M926K2026-03-31Swiss National Bank$102M626K2026-03-31Principal Financial Group Inc$91.3M856K2026-06-30Sumitomo Mitsui Trust Group, Inc.$82M501K2026-03-31Viking Global Investors$69.4M1.04M2024-06-30Dimensional Fund Advisors LP$65.5M401K2026-03-31Bridgewater Associates$48.3M296K2026-03-31Mitsubishi UFJ Asset Management Co., Ltd.$41.7M255K2026-03-31HSBC Holdings PLC$19M116K2026-03-31BNP Paribas Financial Markets$4.1M61.61K2024-06-30Legal & General Group Plc$3.4M135K2023-09-30Duquesne Family Office$189K1.15M2026-03-31
Institutional ownership
INSM in reported 13F portfolios
Reported long holdings only · filing data can be delayed up to 45 days after quarter-end.Managers13
Reported value$877M
Latest periodJun 2026
Frequently asked questions
Who owns INSM?
13 managers currently show reported long INSM positions in Insider Deck’s 13F sample, totaling about $877M.
How fresh is INSM ownership data?
13F filings are quarterly and can lag quarter-end by up to 45 days. Positions appear after SEC tables are processed and CUSIPs resolve to tickers.