RNA — ATRIUM THERAPEUTICS INC
Reported value held$1.25B
Funds holding (latest)44
SectorHealth Care
Funds holding (Q2 2026)29
Institutional value$53.79M · 5.47M sh
New / Add / Cut / Exit3 / 12 / 13 / 5
Top-5 / Top-10 concentration67.3% / 84.3%
Institutional holdings change
Reducing -2.4%
(-132.44K sh)
Institutional value change
Down -0.7%
As of Q2 2026, 29 SEC-registered investment managers reported holding RNA (ATRIUM THERAPEUTICS INC) in their latest 13F filings, with a combined reported value of $53.79M across 5.47M shares. That is -2.4% by share count (-132.44K shares) versus the previous quarter, while reported value moved -0.7%. Ownership is concentrated: the five largest holders account for 67.3% of reported value and the top ten for 84.3%.
Compared with the prior quarter, 3 opened new positions, 12 added to existing stakes, 13 trimmed, 5 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.
RNA is classified in the Health Care sector.
All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.
Q2 2026 — 29 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| BlackRock Inc history | 1.45M | $19.47M | 0.00% | Add |
| Geode Capital Management history | 386.93K | $5.21M | 0.00% | Add |
| Two Sigma Investments history | 345.48K | $4.65M | 0.00% | Add |
| Goldman Sachs Group history | 310.34K | $4.17M | 0.00% | Reduce |
| Millennium Management history | 200.56K | $2.70M | 0.00% | Add |
| AQR Capital Management history | 172.24K | $2.32M | 0.00% | New |
| Bank of America Corp history | 132.83K | $1.79M | 0.00% | Reduce |
| Charles Schwab Investment Management history | 130.22K | $1.75M | 0.00% | Add |
| Norges Bank Investment Management history | 126.58K | $1.70M | 0.00% | Reduce |
| Northern Trust Corp history | 119.78K | $1.61M | 0.00% | Add |
| Balyasny Asset Management history | 105.88K | $1.42M | 0.00% | Reduce |
| Fidelity International (FIL) history | 76.50K | $1.03M | 0.00% | Reduce |
| Citadel Advisors history | 67.64K | $909.75K | 0.00% | Reduce |
| Manulife Financial history | 62.85K | $845.37K | 0.00% | Add |
| Franklin Resources history | 56.70K | $762.60K | 0.00% | New |
| CPP Investments history | 41.97K | $564.50K | 0.00% | Hold |
| Morgan Stanley history | 41.94K | $564.12K | 0.00% | Reduce |
| BNY Mellon history | 39.25K | $527.94K | 0.00% | Reduce |
| Fidelity Management & Research (FMR) history | 33.53K | $451.00K | 0.00% | Add |
| UBS Group AG history | 19.57K | $263.24K | 0.00% | Reduce |
| Wells Fargo & Co history | 17.45K | $234.72K | 0.00% | Add |
| Renaissance Technologies history | 14.97K | $201.36K | 0.00% | New |
| Deutsche Bank AG history | 14.97K | $201.31K | 0.00% | Add |
| Invesco Ltd history | 14.17K | $190.64K | 0.00% | Add |
| JPMorgan Chase & Co history | 9.39K | $128.15K | 0.00% | Reduce |
| Citigroup Inc history | 6.68K | $89.91K | 0.00% | Add |
| T. Rowe Price Associates history | 1.47M | $19.81K | 0.00% | Reduce |
| Legal & General Investment Management America history | 1.42K | $19.13K | 0.00% | Reduce |
| PNC Financial Services history | 594 | $7.99K | 0.00% | Reduce |
Q1 2026 — 30 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| BlackRock Inc history | 1.21M | $16.11M | 0.00% | Reduce |
| Goldman Sachs Group history | 349.95K | $4.68M | 0.00% | Reduce |
| Farallon Capital Management history | 349.36K | $4.67M | 0.03% | New |
| Geode Capital Management history | 319.83K | $4.28M | 0.00% | Reduce |
| Balyasny Asset Management history | 235.12K | $3.14M | 0.00% | Reduce |
| Millennium Management history | 190.86K | $2.55M | 0.00% | Reduce |
| Two Sigma Investments history | 178.56K | $2.39M | 0.00% | New |
| Morgan Stanley history | 165.04K | $2.21M | 0.00% | Reduce |
| Janus Henderson Group history | 139.97K | $1.87M | 0.00% | Reduce |
| Bank of America Corp history | 136.25K | $1.82M | 0.00% | Reduce |
| Charles Schwab Investment Management history | 116.60K | $1.56M | 0.00% | Reduce |
| Citadel Advisors history | 109.94K | $1.47M | 0.00% | Reduce |
| Northern Trust Corp history | 98.58K | $1.32M | 0.00% | Reduce |
| Fidelity International (FIL) history | 78.50K | $1.05M | 0.00% | Reduce |
| Manulife Financial history | 62.38K | $834.01K | 0.00% | Add |
| UBS Group AG history | 49.81K | $666.01K | 0.00% | Reduce |
| BNY Mellon history | 43.70K | $584.23K | 0.00% | Reduce |
| CPP Investments history | 41.97K | $561.14K | 0.00% | New |
| JPMorgan Chase & Co history | 40.99K | $555.36K | 0.04% | Reduce |
| Marshall Wace history | 33.69K | $450.45K | 0.00% | Reduce |
| Fidelity Management & Research (FMR) history | 29.29K | $391.63K | 0.00% | Reduce |
| Point72 Asset Management history | 22.71K | $303.61K | 0.00% | New |
| PSP Investments history | 12.88K | $172.23K | 0.00% | Reduce |
| Wells Fargo & Co history | 11.42K | $152.63K | 0.00% | Reduce |
| Invesco Ltd history | 10.19K | $136.28K | 0.00% | Reduce |
| Deutsche Bank AG history | 10.02K | $133.95K | 0.00% | Reduce |
| Legal & General Investment Management America history | 5.66K | $75.63K | 0.00% | Reduce |
| T. Rowe Price Associates history | 1.55M | $20.77K | 0.00% | Add |
| PNC Financial Services history | 943 | $12.61K | 0.00% | Reduce |
| Citigroup Inc history | 638 | $8.53K | 0.00% | Reduce |
Q4 2025 — 37 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Vanguard Group history | 13.65M | $984.52M | 0.01% | Add |
| BlackRock Inc history | 12.85M | $926.93M | 0.02% | Add |
| Janus Henderson Group history | 6.94M | $500.56M | 0.22% | Reduce |
| Balyasny Asset Management history | 6.04M | $435.71M | 0.57% | New |
| Goldman Sachs Group history | 3.78M | $272.42M | 0.03% | Add |
| Geode Capital Management history | 3.12M | $225.14M | 0.01% | Add |
| Norges Bank Investment Management history | 3.05M | $219.74M | 0.02% | Add |
| Millennium Management history | 2.42M | $174.21M | 0.08% | Add |
| UBS Group AG history | 2.38M | $171.39M | 0.03% | Add |
| Citadel Advisors history | 2.09M | $150.56M | 0.02% | Add |
| Charles Schwab Investment Management history | 1.18M | $85.23M | 0.01% | Add |
| Fidelity International (FIL) history | 1.14M | $82.52M | 0.06% | New |
| Morgan Stanley history | 1.09M | $78.80M | 0.01% | Add |
| Northern Trust Corp history | 1.02M | $73.51M | 0.01% | Add |
| Casdin Capital history | 1.00M | $72.13M | 4.48% | Reduce |
| Soros Fund Management history | 840.98K | $60.66M | 0.79% | New |
| JPMorgan Chase & Co history | 820.99K | $59.22M | 0.01% | Reduce |
| Wellington Management Group history | 723.12K | $52.16M | 0.01% | Reduce |
| Bank of America Corp history | 706.66K | $50.97M | 0.00% | Reduce |
| Citigroup Inc history | 467.69K | $33.73M | 0.01% | Add |
| BNY Mellon history | 417.54K | $30.12M | 0.01% | Add |
| Marshall Wace history | 212.58K | $15.33M | 0.01% | Reduce |
| Wells Fargo & Co history | 210.60K | $15.19M | 0.00% | Reduce |
| Fidelity Management & Research (FMR) history | 183.23K | $13.22M | 0.00% | Reduce |
| Deutsche Bank AG history | 166.84K | $12.03M | 0.00% | Reduce |
| Legal & General Investment Management America history | 112.76K | $8.13M | 0.00% | Reduce |
| Invesco Ltd history | 109.14K | $7.87M | 0.00% | Reduce |
| PSP Investments history | 71.63K | $5.17M | 0.02% | New |
| Manulife Financial history | 60.05K | $4.33M | 0.00% | Reduce |
| Renaissance Technologies history | 45.10K | $3.25M | 0.01% | New |
| Franklin Resources history | 31.18K | $2.25M | 0.00% | Reduce |
| AQR Capital Management history | 14.15K | $1.02M | 0.00% | New |
| Prudential Financial history | 7.06K | $509.24K | 0.00% | Reduce |
| Principal Global Investors history | 6.67K | $480.96K | 0.00% | Reduce |
| PNC Financial Services history | 4.44K | $320.40K | 0.00% | Add |
| Amundi US history | 3.94K | $284.12K | 0.00% | New |
| T. Rowe Price Associates history | 142.89K | $10.31K | 0.00% | Reduce |
Q3 2025 — 30 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Fidelity Management & Research (FMR) history | 21.59M | $940.50M | 0.05% | Add |
| Janus Henderson Group history | 14.52M | $632.81M | 0.29% | Add |
| Vanguard Group history | 13.22M | $575.98M | 0.01% | Add |
| Wellington Management Group history | 10.07M | $438.54M | 0.08% | Add |
| BlackRock Inc history | 9.20M | $400.96M | 0.01% | Reduce |
| Geode Capital Management history | 2.86M | $124.55M | 0.01% | Hold |
| Casdin Capital history | 1.78M | $77.55M | 6.47% | Hold |
| Goldman Sachs Group history | 1.73M | $75.48M | 0.01% | Add |
| Bank of America Corp history | 1.73M | $75.17M | 0.01% | Reduce |
| UBS Group AG history | 1.32M | $57.33M | 0.01% | Add |
| Citadel Advisors history | 1.13M | $49.13M | 0.01% | Add |
| Charles Schwab Investment Management history | 1.12M | $48.96M | 0.01% | Add |
| Northern Trust Corp history | 975.06K | $42.48M | 0.01% | Reduce |
| JPMorgan Chase & Co history | 899.56K | $39.19M | 0.01% | Add |
| Morgan Stanley history | 691.51K | $30.13M | 0.00% | Add |
| Marshall Wace history | 639.58K | $27.87M | 0.03% | Add |
| BNY Mellon history | 381.83K | $16.64M | 0.00% | Hold |
| Wells Fargo & Co history | 307.39K | $13.39M | 0.00% | Add |
| Manulife Financial history | 265.81K | $11.58M | 0.01% | Add |
| Deutsche Bank AG history | 264.61K | $11.53M | 0.00% | Add |
| Invesco Ltd history | 188.36K | $8.21M | 0.00% | Reduce |
| Legal & General Investment Management America history | 121.81K | $5.31M | 0.00% | Add |
| Prudential Financial history | 84.86K | $3.70M | 0.00% | Reduce |
| Millennium Management history | 37.52K | $1.63M | 0.00% | Reduce |
| Franklin Resources history | 32.58K | $1.42M | 0.00% | Reduce |
| Citigroup Inc history | 29.73K | $1.30M | 0.00% | Reduce |
| D. E. Shaw & Co history | 11.58K | $504.41K | 0.00% | Reduce |
| T. Rowe Price Associates history | 9.79M | $426.44K | 0.05% | Reduce |
| Principal Global Investors history | 7.74K | $337.41K | 0.00% | Reduce |
| PNC Financial Services history | 1.95K | $85.14K | 0.00% | Add |
Q2 2025 — 31 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Fidelity Management & Research (FMR) history | 16.19M | $459.68M | 0.03% | Add |
| Janus Henderson Group history | 10.78M | $306.06M | 0.15% | Reduce |
| BlackRock Inc history | 9.34M | $265.17M | 0.01% | Reduce |
| Wellington Management Group history | 9.25M | $262.69M | 0.05% | Reduce |
| Vanguard Group history | 9.25M | $262.65M | 0.00% | Hold |
| Geode Capital Management history | 2.85M | $80.89M | 0.01% | Add |
| Bank of America Corp history | 1.84M | $52.24M | 0.00% | Add |
| Casdin Capital history | 1.77M | $50.41M | 4.59% | Reduce |
| Goldman Sachs Group history | 1.15M | $32.53M | 0.01% | Add |
| Charles Schwab Investment Management history | 1.05M | $29.77M | 0.01% | Add |
| Northern Trust Corp history | 997.05K | $28.32M | 0.00% | Reduce |
| Norges Bank Investment Management history | 995.12K | $28.26M | 0.00% | Add |
| UBS Group AG history | 596.55K | $16.94M | 0.00% | Hold |
| JPMorgan Chase & Co history | 580.27K | $16.48M | 0.00% | Add |
| Morgan Stanley history | 445.88K | $12.66M | 0.00% | Reduce |
| BNY Mellon history | 383.16K | $10.88M | 0.00% | Add |
| Citigroup Inc history | 289.85K | $8.23M | 0.00% | Reduce |
| Manulife Financial history | 263.33K | $7.48M | 0.01% | Hold |
| Wells Fargo & Co history | 255.60K | $7.26M | 0.00% | Add |
| Millennium Management history | 251.99K | $7.16M | 0.00% | Add |
| Invesco Ltd history | 243.06K | $6.90M | 0.00% | Reduce |
| Deutsche Bank AG history | 241.00K | $6.84M | 0.00% | Add |
| D. E. Shaw & Co history | 237.40K | $6.74M | 0.01% | New |
| Citadel Advisors history | 118.82K | $3.37M | 0.00% | Add |
| Prudential Financial history | 113.00K | $3.21M | 0.00% | Reduce |
| Legal & General Investment Management America history | 103.12K | $2.93M | 0.00% | Add |
| Marshall Wace history | 60.22K | $1.71M | 0.00% | Reduce |
| Franklin Resources history | 37.43K | $1.06M | 0.00% | Reduce |
| T. Rowe Price Associates history | 10.81M | $306.97K | 0.04% | Reduce |
| Principal Global Investors history | 8.12K | $230.50K | 0.00% | Reduce |
| PNC Financial Services history | 1.48K | $41.92K | 0.00% | Add |
Q1 2025 — 32 funds
| Fund | Shares | Value | Portfolio Weight | Change |
|---|---|---|---|---|
| Fidelity Management & Research (FMR) history | 15.62M | $460.96M | 0.03% | Reduce |
| Janus Henderson Group history | 11.43M | $361.13M | 0.20% | Add |
| BlackRock Inc history | 9.92M | $292.76M | 0.01% | Hold |
| Wellington Management Group history | 9.68M | $285.89M | 0.06% | Add |
| Vanguard Group history | 9.24M | $272.86M | 0.01% | Reduce |
| Geode Capital Management history | 2.76M | $81.35M | 0.01% | Reduce |
| Casdin Capital history | 2.04M | $60.37M | 4.93% | Hold |
| Bank of America Corp history | 1.57M | $46.48M | 0.00% | Add |
| Charles Schwab Investment Management history | 1.02M | $30.22M | 0.01% | Reduce |
| Northern Trust Corp history | 1.02M | $30.07M | 0.00% | Reduce |
| Goldman Sachs Group history | 784.70K | $23.16M | 0.00% | Add |
| UBS Group AG history | 598.00K | $17.65M | 0.00% | Add |
| Morgan Stanley history | 525.70K | $15.52M | 0.00% | Reduce |
| Marshall Wace history | 455.19K | $13.44M | 0.02% | Add |
| JPMorgan Chase & Co history | 440.80K | $13.01M | 0.00% | Reduce |
| Citigroup Inc history | 377.28K | $11.14M | 0.01% | Add |
| BNY Mellon history | 366.59K | $10.82M | 0.00% | Add |
| Invesco Ltd history | 288.14K | $8.51M | 0.00% | Add |
| Manulife Financial history | 264.51K | $7.81M | 0.01% | Hold |
| Wells Fargo & Co history | 220.79K | $6.52M | 0.00% | Add |
| Deutsche Bank AG history | 184.62K | $5.45M | 0.00% | Reduce |
| Prudential Financial history | 156.63K | $4.62M | 0.01% | Add |
| Legal & General Investment Management America history | 99.25K | $2.93M | 0.00% | Reduce |
| Citadel Advisors history | 86.88K | $2.56M | 0.00% | Reduce |
| Franklin Resources history | 66.89K | $1.97M | 0.00% | Add |
| Millennium Management history | 32.05K | $946.06K | 0.00% | Add |
| Two Sigma Investments history | 28.00K | $826.56K | 0.00% | Reduce |
| T. Rowe Price Associates history | 11.34M | $334.70K | 0.04% | Add |
| AQR Capital Management history | 10.79K | $318.37K | 0.00% | Reduce |
| Principal Global Investors history | 9.07K | $267.75K | 0.00% | Reduce |
| PNC Financial Services history | 377 | $11.13K | 0.00% | Reduce |
| Amundi US history | 52 | $1.46K | 0.00% | Add |
New Positions (Q2 2026)
- AQR Capital Management 172.24K sh · $2.32M
- Franklin Resources 56.70K sh · $762.60K
- Renaissance Technologies 14.97K sh · $201.36K
Fully Exited (vs previous quarter)
- Farallon Capital Management sold 349.36K sh · $4.67M
- Janus Henderson Group sold 139.97K sh · $1.87M
- Marshall Wace sold 33.69K sh · $450.45K
- Point72 Asset Management sold 22.71K sh · $303.61K
- PSP Investments sold 12.88K sh · $172.23K
Fund Position History — shares by quarter (top 20 funds)
| Fund | Q2 2026 | Q1 2026 | Q4 2025 | Q3 2025 | Q2 2025 | Q1 2025 | Q4 2024 | Q3 2024 | Q2 2024 | Q1 2024 | Q4 2023 | Q3 2023 | Q2 2023 | Q1 2023 | Q4 2022 | Q3 2022 | Q2 2022 | Q1 2022 | Q4 2021 | Q3 2021 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BlackRock Inc | 1.45M | 1.21M | 12.85M | 9.20M | 9.34M | 9.92M | 9.93M | 9.73M | — | — | — | — | — | — | — | — | — | — | — | — |
| Geode Capital Management | 386.93K | 319.83K | 3.12M | 2.86M | 2.85M | 2.76M | 2.81M | 2.59M | 2.26M | 1.60M | 1.55M | 1.44M | 1.44M | 1.30M | 1.12M | 939.62K | 848.70K | 737.10K | 714.24K | 1.59M |
| Two Sigma Investments | 345.48K | 178.56K | — | — | — | 28.00K | 132.56K | 130.09K | 225.75K | 247.30K | 667.53K | 563.34K | 514.82K | 328.49K | 106.90K | 20.41K | — | — | — | 13.90K |
| Goldman Sachs Group | 310.34K | 349.95K | 3.78M | 1.73M | 1.15M | 784.70K | 763.05K | 874.75K | 544.05K | 515.28K | 353.64K | 475.91K | 555.84K | 1.01M | 1.12M | 618.90K | 183.28K | 121.89K | 110.23K | 1.61M |
| Millennium Management | 200.56K | 190.86K | 2.42M | 37.52K | 251.99K | 32.05K | 23.94K | 18.54K | 125.38K | 168.59K | 340.62K | 740.50K | 45.14K | — | 750.45K | 38.91K | — | — | 19.05K | 684.14K |
| AQR Capital Management | 172.24K | — | 14.15K | — | — | 10.79K | 13.06K | 24.95K | 12.04K | — | — | — | — | — | — | — | — | — | — | 11.89K |
| Bank of America Corp | 132.83K | 136.25K | 706.66K | 1.73M | 1.84M | 1.57M | 178.59K | 1.34M | 191.27K | 181.67K | 260.61K | 360.21K | 686.52K | 406.49K | 244.36K | 68.59K | 54.50K | 42.65K | 89.11K | 309.70K |
| Charles Schwab Investment Management | 130.22K | 116.60K | 1.18M | 1.12M | 1.05M | 1.02M | 1.03M | 990.18K | 793.12K | 548.43K | 545.77K | 515.10K | 531.64K | 488.60K | 463.82K | 377.12K | 337.48K | 299.80K | 291.34K | 496.46K |
| Norges Bank Investment Management | 126.58K | — | 3.05M | — | 995.12K | — | 724.79K | — | — | — | — | — | — | — | 85.10K | — | — | — | — | — |
| Northern Trust Corp | 119.78K | 98.58K | 1.02M | 975.06K | 997.05K | 1.02M | 1.08M | 971.13K | 760.07K | 671.33K | 662.87K | 640.34K | 651.50K | 601.41K | 527.86K | 480.91K | 456.91K | 373.39K | 379.24K | 1.13M |
| Balyasny Asset Management | 105.88K | 235.12K | 6.04M | — | — | — | 137.06K | 160.81K | — | 51.05K | 1.22M | 2.02M | 1.99M | 751.91K | 648.83K | 57.21K | 186.70K | — | — | 922.10K |
| Fidelity International (FIL) | 76.50K | 78.50K | 1.14M | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Citadel Advisors | 67.64K | 109.94K | 2.09M | 1.13M | 118.82K | 86.88K | 502.18K | 61.00K | 233.38K | 134.13K | 509.96K | 250.15K | 377.65K | 124.12K | 63.92K | 112.90K | 217.26K | 119.20K | — | 986.50K |
| Manulife Financial | 62.85K | 62.38K | 60.05K | 265.81K | 263.33K | 264.51K | 264.31K | 257.46K | 272.76K | 230.13K | 158.61K | 142.26K | 142.94K | 135.94K | 135.09K | 91.47K | 91.95K | 82.12K | 19.74K | 69.39K |
| Franklin Resources | 56.70K | — | 31.18K | 32.58K | 37.43K | 66.89K | 63.40K | 73.05K | 22.14K | — | — | 344.33K | 344.21K | 529.73K | 350.06K | — | — | — | — | 803.34K |
| CPP Investments | 41.97K | 41.97K | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Morgan Stanley | 41.94K | 165.04K | 1.09M | 691.51K | 445.88K | 525.70K | 1.21M | 611.24K | 1.25M | 1.54M | 1.49M | 1.16M | 1.10M | 1.25M | 1.02M | 80.58K | 134.23K | 109.37K | 74.82K | 1.52M |
| BNY Mellon | 39.25K | 43.70K | 417.54K | 381.83K | 383.16K | 366.59K | 363.02K | 303.72K | 363.95K | 248.28K | 258.65K | 252.03K | 254.43K | 231.65K | 196.09K | 175.80K | 156.75K | 136.62K | 135.90K | 424.70K |
| Fidelity Management & Research (FMR) | 33.53K | 29.29K | 183.23K | 21.59M | 16.19M | 15.62M | 16.51M | 16.85M | 16.16M | 14.24M | 10.40M | 11.11M | 10.62M | 5.42M | 4.93M | 3.47M | 3.81M | 3.81M | 3.78M | 3.83M |
| UBS Group AG | 19.57K | 49.81K | 2.38M | 1.32M | 596.55K | 598.00K | 205.91K | 177.88K | 104.38K | 195.45K | 194.35K | 115.96K | 183.07K | 81.23K | 164.99K | 27.82K | 41.08K | 90.87K | 82.23K | 39.04K |
▲ Bought Low (fund opened/added, stock rose ≥5% next quarter) ▼ Sold High (fund reduced, stock fell ≥5% next quarter)
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