Ticker · CUSIP 254604101
Holders (tracked)
8
Combined shares
3,668,405
Combined value
$291.31M
Last close
$71.77
Quarter
2025Q4
Price · 1Y$71.77+29.60 (+70.21%)H $94.11 · L $42.06 · Avg Vol 504K
Insider sellPosition opened
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is -9.6% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
19 events
- Franchi Jean M. · Chief Financial Officer2026-04-14Sold $433.2K @ $69.24Insider sell
- Franchi Jean M. · Chief Financial Officer2026-04-13Sold $27.6K @ $69.00Insider sell
- Savage William Jacob · Chief Medical Officer2026-04-13Sold $233.5K @ $66.12Insider sell
- Savage William Jacob · Chief Medical Officer2026-04-13Sold $147.0K @ $66.81Insider sell
- Ken Griffin (Citadel Advisors) added2026-02-17+50,001 shares · 2025Q4Position
- D.E. Shaw & Co. exited2026-02-17−24,900 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) added2026-02-17+23,779 shares · 2025Q4Position
- T. Rowe Price added2026-02-17+371,576 shares · 2025Q4Position
- Wellington Management added2026-02-17+108,197 shares · 2025Q4Position
- +66,125 shares · 2025Q4Position
- Steve Cohen (Point72) exited2026-02-17−9,226 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+29 shares · 2025Q4Position
- Renaissance Technologies added2026-02-12+56,020 shares · 2025Q4Position
- AQR Capital Management added2025-11-14+329 shares · 2025Q3Position
- Izzy Englander (Millennium Mgmt) added2025-11-14+139,407 shares · 2025Q3Position
- Steve Cohen (Point72) opened position2025-11-14+9,226 shares · 2025Q3Position
- Wellington Management trimmed2025-11-14−22,013 shares · 2025Q3Position
- T. Rowe Price trimmed2025-11-14−189,196 shares · 2025Q3Position
- Renaissance Technologies trimmed2025-11-13−89,620 shares · 2025Q3Position
Insider activity
Last 30 days
Net (open-market)
−$841.3K
Buys
0 · $0
Sells
4 · $841.3K
Unique insiders
2
| Date | Insider | Code | Shares | Price | Value |
|---|---|---|---|---|---|
| 04-14 | Franchi Jean M. Chief Financial Officer · Insider | S | 6,257 | $69.24 | $433.2K |
| 04-13 | Franchi Jean M. Chief Financial Officer · Insider | S | 400 | $69.00 | $27.6K |
| 04-13 | Savage William Jacob Chief Medical Officer · Insider | S | 3,531 | $66.12 | $233.5K |
| 04-13 | Savage William Jacob Chief Medical Officer · Insider | S | 2,200 | $66.81 | $147.0K |
Follow-the-investor returns
If you'd copied each holder of IRON…
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 |
|---|---|---|---|---|
| Wellington Management | 2023Q2 | $52.83 | +35.9% | $109.0M |
| AQR Capital Management | 2025Q2 | $53.32 | +34.6% | $1.0M |
| T. Rowe Price | 2023Q2 | $59.36 | +20.9% | $121.9M |
| Ken Griffin (Citadel Advisors) | 2022Q4 | $72.22 | -0.6% | $7.2M |
| Paul Tudor Jones (Tudor Investment) | 2023Q2 | $72.65 | -1.2% | $4.7M |
| Renaissance Technologies | 2022Q4 | $76.78 | -6.5% | $4.5M |
| Izzy Englander (Millennium Mgmt) | 2022Q4 | $77.48 | -7.4% | $13.3M |
| Izzy Englander (Millennium Mgmt) | 2022Q4 | $77.48 | -7.4% | $13.3M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Paul Tudor Jones (Tudor Investment)+66,125$5.3M
Added to6
- Wellington Management+108,197$8.6M
- Renaissance Technologies+56,020$4.4M
- Ken Griffin (Citadel Advisors)+50,001$4.0M
- Izzy Englander (Millennium Mgmt)+23,779$1.9M
- T. Rowe Price+371,576$30K
- AQR Capital Management+29$2K
Trimmed0
—
Exited2
- D.E. Shaw & Co.−24,900$1.6M
- Steve Cohen (Point72)−9,226$610K
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q4 | 5 | $2.1M |
| 2023Q1 | 5 | $5.4M |
| 2023Q2 | 8 | $73.1M |
| 2023Q3 | 6 | $75.5M |
| 2023Q4 | 8 | $101.5M |
| 2024Q1 | 11 | $189.4M |
| 2024Q2 | 7 | $244.1M |
| 2024Q3 | 6 | $203.6M |
| 2024Q4 | 9 | $139.6M |
| 2025Q1 | 8 | $212.7M |
| 2025Q2 | 7 | $165.0M |
| 2025Q3 | 9 | $198.7M |
| 2025Q4 | 8 | $291.3M |
Who owns IRON
8 super-investors · 2025Q4
Tracked stake
3.67M
shares
Combined value
$291M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added7
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | T. Rowe Price | 1.70M | $135M |
| 2 | Wellington Management | 1.52M | $121M |
| 3 | Izzy Englander Millennium Mgmt | 184.8K | $15M |
| 4 | Ken Griffin Citadel Advisors | 100.4K | $8M |
| 5 | Paul Tudor Jones Tudor Investment | 66.1K | $5M |
| 6 | Renaissance Technologies | 62.8K | $5M |
| 7 | Izzy Englander Millennium Mgmt | 24.0K | $2M |
| 8 | AQR Capital Management | 14.0K | $1M |
Recent moves
20 transactions
- +23,779 · 2025Q4
- +29 · 2025Q4
- +108,197 · 2025Q4
- +371,576 · 2025Q4
- +66,125 · 2025Q4
- SOLDD.E. Shaw & Co.−24,900 · 2025Q4
- +50,001 · 2025Q4
- −9,226 · 2025Q4
- +56,020 · 2025Q4
- −22,013 · 2025Q3
- +9,226 · 2025Q3
- +329 · 2025Q3
- +139,407 · 2025Q3
- TRIMT. Rowe Price−189,196 · 2025Q3
- −89,620 · 2025Q3
- +157,371 · 2025Q2
- −86,906 · 2025Q2
- SOLDD.E. Shaw & Co.−219,603 · 2025Q2
- −911,409 · 2025Q2
- +13,649 · 2025Q2
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