Ticker · CUSIP 254604101

IRON

DISC MEDICINE INC
Healthcare·Biotechnology
···Share
Holders (tracked)
8
Combined shares
3,668,405
Combined value
$156.60M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
8112024Q12025Q4

SEC event timeline

19 events
  1. Franchi Jean M. · Chief Financial Officer
    2026-04-14
    Sold $433.2K @ $69.24
    Insider sell
  2. Franchi Jean M. · Chief Financial Officer
    2026-04-13
    Sold $27.6K @ $69.00
    Insider sell
  3. Savage William Jacob · Chief Medical Officer
    2026-04-13
    Sold $233.5K @ $66.12
    Insider sell
  4. Savage William Jacob · Chief Medical Officer
    2026-04-13
    Sold $147.0K @ $66.81
    Insider sell
  5. Ken Griffin (Citadel Advisors) added2026-02-17
    +50,001 shares · 2025Q4
    13F
  6. D.E. Shaw & Co. exited2026-02-17
    −24,900 shares · 2025Q4
    13F
  7. Izzy Englander (Millennium Mgmt) added2026-02-17
    +23,779 shares · 2025Q4
    13F
  8. T. Rowe Price added2026-02-17
    +371,576 shares · 2025Q4
    13F
  9. Wellington Management added2026-02-17
    +108,197 shares · 2025Q4
    13F
  10. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +66,125 shares · 2025Q4
    13F
  11. Steve Cohen (Point72) exited2026-02-17
    −9,226 shares · 2025Q4
    13F
  12. AQR Capital Management added2026-02-17
    +29 shares · 2025Q4
    13F
  13. Renaissance Technologies added2026-02-12
    +56,020 shares · 2025Q4
    13F
  14. AQR Capital Management added2025-11-14
    +329 shares · 2025Q3
    13F
  15. Izzy Englander (Millennium Mgmt) added2025-11-14
    +139,407 shares · 2025Q3
    13F
  16. Steve Cohen (Point72) opened position2025-11-14
    +9,226 shares · 2025Q3
    13F
  17. Wellington Management trimmed2025-11-14
    −22,013 shares · 2025Q3
    13F
  18. T. Rowe Price trimmed2025-11-14
    −189,196 shares · 2025Q3
    13F
  19. Renaissance Technologies trimmed2025-11-13
    −89,620 shares · 2025Q3
    13F

Insider activity

Last 30 days
Net (open-market)
−$841.3K
Buys
0 · $0
Sells
4 · $841.3K
Unique insiders
2
DateInsiderCodeSharesPriceValue
04-14Franchi Jean M.
Chief Financial Officer · Insider
S6,257$69.24$433.2K
04-13Franchi Jean M.
Chief Financial Officer · Insider
S400$69.00$27.6K
04-13Savage William Jacob
Chief Medical Officer · Insider
S3,531$66.12$233.5K
04-13Savage William Jacob
Chief Medical Officer · Insider
S2,200$66.81$147.0K
View full insider history for IRON →

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions1
Added to6
Trimmed0
—
Exited2

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q4
5
$1.5M
2023Q1
5
$4.6M
2023Q2
8
$61.1M
2023Q3
6
$49.4M
2023Q4
8
$64.6M
2024Q1
11
$130.1M
2024Q2
7
$193.6M
2024Q3
6
$148.0M
2024Q4
9
$51.2M
2025Q1
8
$145.3M
2025Q2
7
$84.8M
2025Q3
9
$111.1M
2025Q4
8
$156.6M

Who owns IRON

8 super-investors · 2025Q4
Tracked stake
3.67M
shares
Combined value
$157M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added7
#ManagerSharesValue
1Wellington Management1.52M$121M
2Izzy Englander
Millennium Mgmt
184.8K$15M
3Ken Griffin
Citadel Advisors
100.4K$8M
4Paul Tudor Jones
Tudor Investment
66.1K$5M
5Renaissance Technologies62.8K$5M
6Izzy Englander
Millennium Mgmt
24.0K$2M
7AQR Capital Management14.0K$1M
8T. Rowe Price1.70M$135K

Recent moves

20 transactions
Embed this chart
Paste this iframe anywhere to embed the live IRON chart.
<iframe src="https://openstocks.me/embed/stock/IRON" width="100%" height="480" frameborder="0" loading="lazy" title="IRON chart by OpenStocks" style="border:0;border-radius:12px;background:transparent"></iframe>
Preview: https://openstocks.me/embed/stock/IRON