Ticker · CUSIP 462222100
Holders (tracked)
18
Combined shares
15,908,591
Combined value
$1.26B
Last close
$75.71
Quarter
2025Q4
Price · 1Y$75.71+47.31 (+166.58%)H $86.50 · L $28.40 · Avg Vol 2.2M
Tracked holders · last 8 quarters
+4 vs previous quarter over the last 8.
Price is -4.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
29 events
- +3,661 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+11,947 shares · 2025Q4Position
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−267,429 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−298,135 shares · 2025Q4Position
- Two Sigma Investments added2026-02-17+1,082,703 shares · 2025Q4Position
- Ron Baron (Baron Capital / BAMCO) added2026-02-17+11,000 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−686,308 shares · 2025Q4Position
- Steve Cohen (Point72) opened position2026-02-17+28,200 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+258,155 shares · 2025Q4Position
- Wellington Management trimmed2026-02-17−328,486 shares · 2025Q4Position
- Ray Dalio (Bridgewater Associates) added2026-02-13+24,128 shares · 2025Q4Position
- Renaissance Technologies trimmed2026-02-12−263,107 shares · 2025Q4Position
- Cathie Wood (ARK Invest) trimmed2026-02-11−208,247 shares · 2025Q4Position
- Norges Bank (Norway SWF) opened position2026-02-10+320,160 shares · 2025Q4Position
- Ken Fisher (Fisher Asset Mgmt) added2026-02-09+135,405 shares · 2025Q4Position
- D.E. Shaw & Co. opened position2025-11-14+630,938 shares · 2025Q3Position
- AQR Capital Management opened position2025-11-14+6,815 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−1,869,957 shares · 2025Q3Position
- Steve Cohen (Point72) exited2025-11-14−292,647 shares · 2025Q3Position
- Two Sigma Investments trimmed2025-11-14−212,424 shares · 2025Q3Position
- T. Rowe Price trimmed2025-11-14−396,388 shares · 2025Q3Position
- Wellington Management added2025-11-14+243,035 shares · 2025Q3Position
- +25,000 shares · 2025Q3Position
- +43,578 shares · 2025Q3Position
- Renaissance Technologies added2025-11-13+216,000 shares · 2025Q3Position
- Norges Bank (Norway SWF) exited2025-11-13−450,254 shares · 2025Q3Position
- +6,210 shares · 2025Q3Position
- Norges Bank (Norway SWF) added2025-11-12+1,007,820 shares · 2024Q3Position
- Cathie Wood (ARK Invest) trimmed2025-11-12−269,103 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of IONS…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| Paul Tudor Jones (Tudor Investment) | 2016Q2 | $35.07 | +115.9% | $277K |
| Steve Cohen (Point72) | 2016Q1 | $39.14 | +93.4% | $1.1M |
| Steve Cohen (Point72) | 2016Q1 | $39.14 | +93.4% | $1.1M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $39.33 | +92.5% | $7.1M |
| Wellington Management | 2016Q1 | $43.55 | +73.8% | $474.0M |
| Cathie Wood (ARK Invest) | 2016Q4 | $45.67 | +65.8% | $32.0M |
| Renaissance Technologies | 2016Q1 | $51.84 | +46.0% | $16.9M |
| T. Rowe Price | 2016Q1 | $52.64 | +43.8% | $226.2M |
| Two Sigma Investments | 2017Q2 | $55.09 | +37.4% | $201.3M |
| D.E. Shaw & Co. | 2016Q1 | $64.57 | +17.3% | $25.2M |
| Ray Dalio (Bridgewater Associates) | 2021Q2 | $66.50 | +13.9% | $5.1M |
| Ron Baron (Baron Capital / BAMCO) | 2025Q3 | $69.60 | +8.8% | $2.7M |
| AQR Capital Management | 2016Q1 | $70.55 | +7.3% | $1.4M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $78.38 | -3.4% | $5.2M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $78.38 | -3.4% | $5.2M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $78.38 | -3.4% | $5.2M |
| Ken Fisher (Fisher Asset Mgmt) | 2025Q3 | $78.51 | -3.6% | $10.7M |
| Norges Bank (Norway SWF) | 2016Q1 | $3949.51 | -98.1% | $24.2M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions3
- Norges Bank (Norway SWF)+320,160$25.3M
- Steve Cohen (Point72)+28,200$2.2M
- Paul Tudor Jones (Tudor Investment)+3,661$290K
Added to6
- Two Sigma Investments+1,082,703$85.7M
- Ken Fisher (Fisher Asset Mgmt)+135,405$10.7M
- Ray Dalio (Bridgewater Associates)+24,128$1.9M
- AQR Capital Management+11,947$941K
- Ron Baron (Baron Capital / BAMCO)+11,000$870K
- T. Rowe Price+258,155$20K
Trimmed6
- Izzy Englander (Millennium Mgmt)−686,308$54.3M
- Wellington Management−328,486$26.0M
- D.E. Shaw & Co.−298,135$23.6M
- Ken Griffin (Citadel Advisors)−267,429$21.2M
- Renaissance Technologies−263,107$20.8M
- Cathie Wood (ARK Invest)−208,247$16.5M
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 13 | $30.27B |
| 2022Q2 | 15 | $42.55B |
| 2022Q3 | 14 | $923.1M |
| 2022Q4 | 15 | $754.6M |
| 2023Q1 | 14 | $649.7M |
| 2023Q2 | 15 | $815.9M |
| 2023Q3 | 13 | $860.7M |
| 2023Q4 | 13 | $1.00B |
| 2024Q1 | 13 | $1.05B |
| 2024Q2 | 15 | $1.24B |
| 2024Q3 | 13 | $746.5M |
| 2024Q4 | 12 | $376.6M |
| 2025Q1 | 12 | $575.8M |
| 2025Q2 | 12 | $690.4M |
| 2025Q3 | 14 | $1.05B |
| 2025Q4 | 18 | $1.26B |
Who owns IONS
18 super-investors · 2025Q4
Tracked stake
15.91M
shares
Combined value
$1.26B
% of shares outstanding
—
shares-out unknown
Quarter action mix
New4Added6Trim8
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 6.26M | $495M |
| 2 | T. Rowe Price | 2.99M | $236M |
| 3 | Two Sigma Investments | 2.66M | $210M |
| 4 | Ken Griffin Citadel Advisors | 2.13M | $169M |
| 5 | Cathie Wood ARK Invest | 423.0K | $33M |
| 6 | D.E. Shaw & Co. | 332.8K | $26M |
| 7 | Norges Bank Norway SWF | 320.2K | $25M |
| 8 | Renaissance Technologies | 223.6K | $18M |
| 9 | Ken Fisher Fisher Asset Mgmt | 141.6K | $11M |
| 10 | Ken Griffin Citadel Advisors | 109.4K | $9M |
| 11 | Izzy Englander Millennium Mgmt | 93.3K | $7M |
| 12 | Ken Griffin Citadel Advisors | 69.0K | $5M |
| 13 | Ray Dalio Bridgewater Associates | 67.7K | $5M |
| 14 | Ron Baron Baron Capital / BAMCO | 36.0K | $3M |
| 15 | AQR Capital Management | 18.8K | $1M |
| 16 | Steve Cohen Point72 | 14.1K | $1M |
| 17 | Steve Cohen Point72 | 14.1K | $1M |
| 18 | Paul Tudor Jones Tudor Investment | 3.7K | $290K |
Recent moves
20 transactions
- −267,429 · 2025Q4
- +3,661 · 2025Q4
- +11,000 · 2025Q4
- TRIMD.E. Shaw & Co.−298,135 · 2025Q4
- −686,308 · 2025Q4
- +11,947 · 2025Q4
- +28,200 · 2025Q4
- +258,155 · 2025Q4
- +1,082,703 · 2025Q4
- −328,486 · 2025Q4
- +24,128 · 2025Q4
- −263,107 · 2025Q4
- −208,247 · 2025Q4
- +320,160 · 2025Q4
- +135,405 · 2025Q4
- −1,869,957 · 2025Q3
- −292,647 · 2025Q3
- −212,424 · 2025Q3
- +630,938 · 2025Q3
- TRIMT. Rowe Price−396,388 · 2025Q3
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