Ticker · CUSIP 457985208
Holders (tracked)
8
Combined shares
2,778,412
Combined value
$34.51M
Last close
$11.14
Quarter
2025Q4
Price · 1Y$11.14-4.69 (-29.63%)H $17.35 · L $8.90 · Avg Vol 1.1M
Tracked holders · last 8 quarters
Flat over the last 8 quarters.
Price is -10.3% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
16 events
- +255,807 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2026-02-17−155,554 shares · 2025Q4Position
- Two Sigma Investments trimmed2026-02-17−166,102 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−75,995 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+2,618 shares · 2025Q4Position
- Wellington Management added2026-02-17+32,192 shares · 2025Q4Position
- AQR Capital Management trimmed2026-02-17−11,145 shares · 2025Q4Position
- Renaissance Technologies opened position2026-02-12+14,760 shares · 2025Q4Position
- Ken Fisher (Fisher Asset Mgmt) exited2026-02-09−47,198 shares · 2025Q4Position
- D.E. Shaw & Co. trimmed2025-11-14−43,153 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+57,881 shares · 2025Q3Position
- AQR Capital Management added2025-11-14+22,658 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−611,848 shares · 2025Q3Position
- Wellington Management trimmed2025-11-14−2,493 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+4,066 shares · 2025Q3Position
- Norges Bank (Norway SWF) trimmed2025-11-12−641,512 shares · 2024Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of IART…
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 |
|---|---|---|---|---|
| Ken Griffin (Citadel Advisors) | 2016Q1 | $12.41 | -10.3% | $2.8M |
| Izzy Englander (Millennium Mgmt) | 2016Q1 | $17.08 | -34.8% | $1.7M |
| AQR Capital Management | 2016Q1 | $24.78 | -55.0% | $1.3M |
| D.E. Shaw & Co. | 2016Q1 | $25.85 | -56.9% | $5.2M |
| Two Sigma Investments | 2016Q1 | $27.50 | -59.5% | $3.9M |
| T. Rowe Price | 2016Q1 | $36.85 | -69.8% | $703K |
| Wellington Management | 2016Q4 | $45.54 | -75.5% | $15.1M |
| Renaissance Technologies | 2016Q1 | $50.60 | -78.0% | $164K |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions2
- Ken Griffin (Citadel Advisors)+255,807$3.2M
- Renaissance Technologies+14,760$183K
Added to2
- Wellington Management+32,192$400K
- T. Rowe Price+2,618$33
Trimmed4
- Two Sigma Investments−166,102$2.1M
- D.E. Shaw & Co.−155,554$1.9M
- Izzy Englander (Millennium Mgmt)−75,995$944K
- AQR Capital Management−11,145$138K
Exited1
- Ken Fisher (Fisher Asset Mgmt)−47,198$676K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 14 | $43.12B |
| 2022Q2 | 13 | $34.47B |
| 2022Q3 | 14 | $680.0M |
| 2022Q4 | 17 | $907.6M |
| 2023Q1 | 16 | $830.1M |
| 2023Q2 | 18 | $562.7M |
| 2023Q3 | 12 | $413.7M |
| 2023Q4 | 14 | $421.8M |
| 2024Q1 | 15 | $454.4M |
| 2024Q2 | 15 | $549.1M |
| 2024Q3 | 13 | $91.2M |
| 2024Q4 | 11 | $48.6M |
| 2025Q1 | 11 | $96.7M |
| 2025Q2 | 9 | $46.6M |
| 2025Q3 | 8 | $42.2M |
| 2025Q4 | 8 | $34.5M |
Who owns IART
8 super-investors · 2025Q4
Tracked stake
2.78M
shares
Combined value
$35M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added2Trim4
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Wellington Management | 1.35M | $17M |
| 2 | D.E. Shaw & Co. | 469.6K | $6M |
| 3 | Two Sigma Investments | 353.3K | $4M |
| 4 | Ken Griffin Citadel Advisors | 255.8K | $3M |
| 5 | Izzy Englander Millennium Mgmt | 149.0K | $2M |
| 6 | AQR Capital Management | 119.5K | $1M |
| 7 | T. Rowe Price | 63.1K | $784K |
| 8 | Renaissance Technologies | 14.8K | $183K |
Recent moves
20 transactions
- +2,618 · 2025Q4
- +32,192 · 2025Q4
- TRIMD.E. Shaw & Co.−155,554 · 2025Q4
- −166,102 · 2025Q4
- −75,995 · 2025Q4
- +255,807 · 2025Q4
- −11,145 · 2025Q4
- +14,760 · 2025Q4
- −47,198 · 2025Q4
- +57,881 · 2025Q3
- −611,848 · 2025Q3
- +22,658 · 2025Q3
- +4,066 · 2025Q3
- TRIMD.E. Shaw & Co.−43,153 · 2025Q3
- −2,493 · 2025Q3
- −641,512 · 2024Q3
- +75,485 · 2025Q2
- +326,674 · 2025Q2
- +417,838 · 2025Q2
- +4,745 · 2025Q2
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