Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in CGEM held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | MPM BioImpact LLC | 9.7M | $177.2M | +27.2% | 15.834% | 10.81% |
| 2 | Lynx1 Capital Management LP | 9.0M | $163.2M | 0.0% | 14.585% | 11.89% |
| 3 | BVF INC/IL | 5.8M | $104.7M | 0.0% | 9.357% | 2.68% |
| 4 | BlackRock, Inc. | 5.2M | $95.3M | +17.6% | 8.514% | 0.00% |
| 5 | STATE STREET CORP | 3.7M | $66.8M | +44.2% | 5.969% | 0.00% |
| 6 | Kynam Capital Management, LP | 3.1M | $56.7M | 0.0% | 5.067% | 3.13% |
| 7 | VANGUARD CAPITAL MANAGEMENT LLC | 2.6M | $47.6M | +5.3% | 4.253% | 0.00% |
| 8 | RTW INVESTMENTS, LP | 2.4M | $43.1M | +38.6% | 3.847% | 0.37% |
| 9 | Siren, L.L.C. | 1.9M | $34.5M | +58.7% | 3.081% | 0.70% |
| 10 | GEODE CAPITAL MANAGEMENT, LLC | 1.5M | $28.2M | +13.1% | 2.518% | 0.00% |
| 11 | Blue Owl Capital Holdings LP | 1.5M | $28.0M | -19.4% | 2.505% | 4.22% |
| 12 | Venrock Adviser, LLC | 1.4M | $25.1M | 0.0% | 2.245% | 0.76% |
| 13 | BOOTHBAY FUND MANAGEMENT, LLC | 1.1M | $19.7M | -2.7% | 1.761% | 0.26% |
| 14 | DIMENSIONAL FUND ADVISORS LP | 1.0M | $19.1M | +15.5% | 1.703% | 0.00% |
| 15 | GOLDMAN SACHS GROUP INC | 1.0M | $18.2M | +119.9% | 1.630% | 0.00% |
| 16 | Affinity Asset Advisors, LLC | 876K | $15.9M | +12.1% | 1.425% | 0.72% |
| 17 | VANGUARD PORTFOLIO MANAGEMENT LLC | 739K | $13.5M | +33.7% | 1.202% | 0.00% |
| 18 | BOONE CAPITAL MANAGEMENT LLC | 704K | $12.8M | β | 1.146% | 3.00% |
| 19 | Elmind Capital, LP | 690K | $12.6M | +30.2% | 1.123% | 3.16% |
| 20 | MORGAN STANLEY | 629K | $11.5M | +6.7% | 1.023% | 0.00% |
| 21 | TWIN FOCUS CAPITAL PARTNERS, LLC | 595K | $10.8M | 0.0% | 0.969% | 1.10% |
| 22 | AQR CAPITAL MANAGEMENT LLC | 581K | $10.6M | +61.1% | 0.946% | 0.00% |
| 23 | NORTHERN TRUST CORP | 571K | $10.4M | +27.1% | 0.929% | 0.00% |
| 24 | CITADEL ADVISORS LLC | 513K | $9.3M | +75.5% | 0.835% | 0.00% |
| 25 | BANK OF AMERICA CORP /DE/ | 510K | $9.3M | -1.2% | 0.830% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). β% of Fundβ shows how much of that investorβs total 13F portfolio is invested in CGEM β a direct measure of their conviction.
Filings activity in CGEM during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings Β· Ξ columns show change vs prior quarter
| Quarter | Inst. Holders | Ξ Holders | Ownership % | Ξ Ownership | Total 13F Value | Ξ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 182 | +6.4% | 116.89% | +4.96 pp | $1.24B | +37% |
| Q1 2026 | 171 | +12% | 111.93% | +1.50 pp | $903M | +38% |
| Q4 2025 | 153 | +8.5% | 110.43% | +2.09 pp | $654M | +81% |
| Q3 2025 | 141 | 2.1% | 108.34% | 2.95 pp | $361M | 23% |
| Q2 2025 | 144 | 2.7% | 111.29% | +0.83 pp | $468M | +1.0% |
| Q1 2025 | 148 | +1.4% | 110.46% | 2.10 pp | $464M | 39% |
| Q4 2024 | 146 | +7.4% | 112.56% | 2.00 pp | $761M | 28% |
| Q3 2024 | 136 | β | 114.56% | β | $1.06B | β |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Ξ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying CGEM stock.
Based on Q2 2026 13F filings, institutional ownership of Cullinan Therapeutics, Inc. stands at 116.9%, held across 182 reporting institutions.
MPM BioImpact LLC is the largest reported institutional holder of CGEM, with approximately 9,731,341 shares worth $0.18B as of Q2 2026.
Yes β 1 widely-followed marquee investor appear among the top 25 institutional holders of CGEM, including CITADEL ADVISORS LLC.
Our composite Smart Money Score for CGEM is 62 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
28 institutions opened new positions in CGEM during Q2 2026, while 18 fully exited. 123 added to existing positions and 26 trimmed.
CGEM institutional ownership rose by 4.96 percentage points quarter-over-quarter, with a net change of +11 holders.
The top 10 institutions account for 66.0% of all reported 13F value in CGEM, and the top 25 account for 84.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Cullinan Therapeutics, Inc. (CGEM) Institutional Ownership