Security record · archived quarter
SION
Sionna Therapeutics, Inc. · Healthcare · Biotechnology
54Tracked holders
+1Δ holders
14.59MShares held
$579.96MReported value
+6New positions
−5Exits
Momentum inputs (comparable managers):
holder breadth +1.9% ·
share flow +9.6% ·
net new positions +1.9%
· formula
Broad accumulation: rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Viking Global Investors ✦ | 3.20M | 0.0% | $128.09M | 0.4% | Held | 5 | SEC ↗ |
| 2 | Jennison Associates Llc | 1.45M | +30.1% | $58.18M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | JPMorgan Chase ✦ | 1.47M | +18.9% | $53.71M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 4 | BlackRock ✦ (passive) | 1.30M | +0.3% | $51.95M | 0.0% | ▲ Add | 4 | SEC ↗ ×9 |
| 5 | Citadel Advisors ✦ | 1.17M | +7.3% | $46.78M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 6 | Vanguard Capital Management Llc | 1.03M | n/a | $41.27M | 0.0% | n/c | 1 | SEC ↗ |
| 7 | T. Rowe Price ✦ | 756.38K | -9.0% | $30.32M | 0.0% | ▼ Trim | 5 | SEC ↗ ×2 |
| 8 | State Street Global Advisors ✦ (passive) | 756.23K | +9.1% | $30.32M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 9 | Aberdeen Group plc | 564.17K | -32.8% | $22.62M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 10 | Geode Capital Management ✦ (passive) | 389.87K | +2.6% | $15.63M | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 11 | Goldman Sachs Group ✦ | 263.17K | +625.6% | $10.55M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 12 | Ensign Peak Advisors, Inc | 255.64K | +220.1% | $10.25M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 13 | Franklin Resources Inc | 175.48K | 0.0% | $7.04M | 0.0% | Held | 2 | SEC ↗ |
| 14 | Adage Capital Partners ✦ | 150.00K | New | $6.01M | 0.0% | New | 1 | SEC ↗ |
| 15 | UBS Group AG | 147.64K | +65.6% | $5.92M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | Millennium Management ✦ | 140.64K | +74.6% | $5.64M | 0.0% | ▲ Add | 5 | SEC ↗ |
| 17 | Point72 Asset Management ✦ | 136.55K | New | $5.47M | 0.0% | New | 1 | SEC ↗ |
| 18 | Alyeska Investment Group, L.P. | 136.22K | 0.0% | $5.46M | 0.0% | Held | 2 | SEC ↗ |
| 19 | Morgan Stanley ✦ | 133.02K | +166.7% | $5.33M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 20 | Charles Schwab Investment… | 120.25K | -2.8% | $4.82M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 21 | Northern Trust Corp | 116.78K | +4.2% | $4.68M | 0.0% | ▲ Add | 2 | SEC ↗ ×3 |
| 22 | Td Asset Management Inc | 83.00K | -26.8% | $3.33M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 23 | Ameriprise Financial Inc | 81.97K | -19.4% | $3.29M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 81.39K | +21096.6% | $3.26M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 25 | Manufacturers Life Insurance… | 64.46K | -7.2% | $2.58M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 26 | Bank Of America Corp /De/ | 50.87K | +16.8% | $2.04M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 27 | Russell Investments Group, Ltd. | 48.42K | +120.7% | $1.94M | 0.0% | ▲ Add | 2 | SEC ↗ ×4 |
| 28 | Wellington Management ✦ | 46.08K | +20.2% | $1.85M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 29 | Qube Research & Technologies Ltd | 42.24K | New | $1.69M | 0.0% | New | 1 | SEC ↗ |
| 30 | Bnp Paribas Financial Markets | 40.57K | +1692.0% | $1.63M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | Bank of New York Mellon Corp | 33.78K | -3.9% | $1.35M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 32 | Nuveen, LLC | 23.73K | 0.0% | $951,496 | 0.0% | Held | 2 | SEC ↗ ×2 |
| 33 | Barclays Plc | 18.39K | -61.8% | $737,056 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 34 | Rhumbline Advisers | 18.31K | +3.5% | $733,958 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Citigroup Inc | 18.06K | +248.3% | $723,945 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 36 | Alliancebernstein L.P. | 16.41K | +5.1% | $675,107 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 37 | Squarepoint Ops LLC | 15.22K | -7.0% | $610,050 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 38 | Deutsche Bank Ag\ | 13.25K | +32.1% | $531,153 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 39 | Invesco Ltd. | 10.79K | -90.3% | $432,451 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 40 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 9.19K | +3.0% | $362,944 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 41 | Susquehanna International Group, Llp | 7.31K | New | $293,058 | 0.0% | New | 1 | SEC ↗ |
| 42 | Wells Fargo & Company/Mn | 5.89K | -66.4% | $236,291 | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 43 | Two Sigma Investments ✦ | 5.50K | -14.1% | $220,495 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 44 | New York State Common Retirement… | 5.30K | 0.0% | $212,477 | 0.0% | Held | 2 | SEC ↗ |
| 45 | Mirae Asset Global Investments Co.… | 2.33K | +7.3% | $93,330 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | Legal & General Group Plc | 1.43K | -14.9% | $57,352 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 47 | California State Teachers… | 868 | -12.2% | $34,798 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 48 | Zurcher Kantonalbank (Zurich… | 371 | New | $14,873 | 0.0% | New | 1 | SEC ↗ |
| 49 | Rockefeller Capital Management L.P. | 241 | +402.1% | $9,661 | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 50 | UBS AM, a distinct business unit of… | 116 | New | $4,650 | 0.0% | New | 1 | SEC ↗ |
| 51 | Cwm, Llc | 67 | -16.2% | $2,686 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 52 | Us Bancorp \De\ | 51 | -21.5% | $2,045 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 53 | Royal Bank Of Canada | 30 | -93.9% | $1,000 | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 54 | Pnc Financial Services Group, Inc. | 16 | +220.0% | $641 | 0.0% | ▲ Add | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value: the conviction measure. ✦ = curated manager.
New buyers
| Adage Capital Partners | $6.01M | 0.0% |
| Point72 Asset Management | $5.47M | 0.0% |
| Qube Research & Technologies… | $1.69M | 0.0% |
| Susquehanna International… | $293,058 | 0.0% |
| Zurcher Kantonalbank (Zurich… | $14,873 | 0.0% |
| UBS AM, a distinct business… | $4,650 | 0.0% |
Exited
| American Century Companies Inc | $254,245 | was 0.0% |
| D. E. Shaw & Co. | $236,226 | was 0.0% |
| ProShare Advisors LLC | $201,710 | was 0.0% |
| Balyasny Asset Management L.P. | $57,843 | was 0.0% |
| Daiwa Securities Group Inc. | $6,000 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 121 holders, 43.94M shares, $1.73B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold: shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 17
RA CAPITAL MANAGEMENT, L.P.
Director, 10% owner · 3.42M sh · $21.58M
Sep 17
RA CAPITAL MANAGEMENT, L.P.
Director, 10% owner · 33.80K sh · $252,148
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Sep 21
SC 13D/A: RA CAPITAL MANAGEMENT, L.P.
14.3% of class · View original SEC filing ↗
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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