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SIONNA THER (SION)
NASDAQ
$42.10+$3.27 (+8.42%)
Price as of Jun 23, 2026 5:19 PM EDT- $1.8BMarket Cap
- 175.39%1-Year Change
- BiotechnologyIndustry
SIONNA THER (SION)
$42.10+$3.27 (+8.42%)
Top Holders
Institutional
Mutual Funds
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
RA CAPITAL MANAGEMENT, L.P. | 21.94% | 9.9M | 0 (0.00%) | Mar 31, 2026 |
TPG GP A, LLC | 14.39% | 6.5M | -250,000 (-3.85%) | Mar 31, 2026 |
ORBIMED ADVISORS LLC | 7.82% | 3.5M | -30,953 (-0.88%) | Mar 31, 2026 |
VIKING GLOBAL INVESTORS LP | 7.08% | 3.2M | 0 (0.00%) | Mar 31, 2026 |
ATLAS VENTURE LIFE SCIENCE ADVISORS, LLC | 6.63% | 3.0M | 0 (0.00%) | Mar 31, 2026 |
ENAVATE SCIENCES GP, LLC | 5.49% | 2.5M | 0 (0.00%) | Mar 31, 2026 |
JPMORGAN CHASE & CO | 3.24% | 1.5M | +233,195 (+15.92%) | Mar 31, 2026 |
Holder | Ownership %
| Shares Held | Change (Shares, %) | Report Date |
|---|---|---|---|---|
VANGUARD INDEX FUNDS | 2.22% | 1.0M | +52,914 (+5.28%) | Mar 31, 2026 |
iSHARES TRUST | 1.73% | 783,163 | -1,659 (-0.21%) | Mar 31, 2026 |
MUTUAL FUND SERIES TRUST | 1.44% | 649,342 | +7,577 (+1.17%) | Mar 31, 2026 |
PRUDENTIAL SECTOR FUNDS, INC. | 1.23% | 553,942 | 0 (0.00%) | Nov 28, 2025 |
JPMORGAN TRUST II | 1.22% | 551,829 | -109,924 (-19.92%) | Mar 31, 2026 |
T. Rowe Price Health Sciences Fund, Inc. | 1.21% | 547,443 | -85,568 (-15.63%) | Mar 31, 2026 |
SPDR SERIES TRUST | 0.92% | 416,630 | +7,550 (+1.81%) | Mar 31, 2026 |
Current Ownership Distribution
- Institutions214.1M (84.43%)
- Mutual Funds29.2M (11.52%)
- Insiders10.3M (4.05%)
- Other0 (0.00%)
Insider Transactions
- 4.05% (10.3M)Current InsiderOwnership (%, shares)
- 1Number of InsiderBuying (last 12 months)
- $105.9MAmount of InsiderBuying (last 12 months)
- 8Number of InsiderSelling (last 12 months)
- $6.9BAmount of InsiderSelling (last 12 months)
Insider Name & Title | Type | Date
| Transaction Value | Shares | Share Price | Shares After Transactions |
|---|---|---|---|---|---|---|
Resnick Joshua | Award | Jun 17, 2026 | $0.00 | 17,340 | $0.00 | 17,340 |
Thompson Peter A. | Award | Jun 17, 2026 | $0.00 | 17,340 | $0.00 | 17,340 |
Fleming Harold Edward | Award | Jun 17, 2026 | $0.00 | 17,340 | $0.00 | 17,340 |
Stelzer Laurie | Award | Jun 17, 2026 | $0.00 | 17,340 | $0.00 | 17,340 |
Ruddy Marcella K. | Award | Jun 17, 2026 | $0.00 | 17,340 | $0.00 | 17,340 |
Fitzpatrick Jennifer Chief Legal Officer | Exempt | Mar 05, 2026 | $0.00 | 10,250 | $0.00 | 50,935 |
Fitzpatrick Jennifer Chief Legal Officer | Exempt | Mar 05, 2026 | $62,627.50 | 10,250 | $6.11 | 10,250 |
Fitzpatrick Jennifer Chief Legal Officer | Sell | Mar 05, 2026 | $347,018.88 | 10,250 | $33.86 | 0 |
TPG GP A, LLC | Sell | Jan 22, 2026 | $10.0M | 250,000 | $40.00 | 6.5M |
Beer Caroline Stark Chief Business Officer | Award | Jan 02, 2026 | $0.00 | 139,340 | $0.00 | 139,340 |
Fitzpatrick Jennifer Chief Legal Officer | Award | Jan 02, 2026 | $0.00 | 103,140 | $0.00 | 103,140 |
Thompson Peter A. | Sell | Dec 24, 2025 | $1.5M | 33,356 | $44.55 | 3.6M |
Thompson Peter A. | Sell | Dec 19, 2025 | $38,928.75 | 875 | $44.49 | 3.6M |
Thompson Peter A. | Sell | Dec 18, 2025 | $4,449.00 | 100 | $44.49 | 3.6M |
Thompson Peter A. | Sell | Dec 17, 2025 | $40,050.00 | 900 | $44.50 | 3.6M |
ORBIMED ADVISORS LLC | Sell | Nov 26, 2025 | $71,184.00 | 1,600 | $44.49 | 3.6M |
ORBIMED ADVISORS LLC | Sell | Nov 25, 2025 | $530,294.00 | 11,890 | $44.60 | 3.6M |
ORBIMED ADVISORS LLC | Sell | Nov 24, 2025 | $4.2M | 94,583 | $44.54 | 3.6M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 21, 2025 | $47,795.00 | 1,210 | $39.50 | 6.9M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 21, 2025 | $391,998.00 | 9,924 | $39.50 | 650,307 |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 21, 2025 | $254,380.00 | 6,440 | $39.50 | 2.2M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 21, 2025 | $300,555.50 | 7,609 | $39.50 | 159,033 |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $5,983.50 | 150 | $39.89 | 6.9M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $49,264.15 | 1,235 | $39.89 | 661,019 |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $31,951.89 | 801 | $39.89 | 2.2M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $37,775.83 | 947 | $39.89 | 167,246 |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $3,888.00 | 96 | $40.50 | 6.9M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $31,914.00 | 788 | $40.50 | 660,231 |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $20,736.00 | 512 | $40.50 | 2.2M |
RA CAPITAL MANAGEMENT, LLC | Sell | Nov 20, 2025 | $24,462.00 | 604 | $40.50 | 166,642 |