Explore more topics
Public ownership evidence

Disc Medicine, Inc. Common Stock (IRON) Ownership Disclosures

Read IRON insider transactions, institutional 13F filings and Congressional disclosures with report dates, public availability and original receipts.

As of 2026-11-07T14:03:26.246Z

Jump to a section

Read one actual disclosure before using it

Show the table · 1 row, 6 columns

Scroll sideways to compare all columns. Select a heading to sort.

2026-10-212026-10-21Bitterman KevinS266Not reported

First displayed source row from Recent Form 4 activity. The full bounded history and coverage notes remain below.

The displayed observation date is 2026-10-21 and its public availability date is 2026-10-21. Subtracting those calendar dates gives 0 days of disclosure lag. Historical public research can use the record from the availability date, rather than backdating knowledge to the observation date. The calendar-day difference does not assert an intraday publication time.

This row is code S: a sale. A purchase-following rule excludes this sale even if the reported dollar amount is large.

Open the linked original receipts to verify the row, then inspect a second record before drawing a pattern. This public filing observation supplies source evidence, not a completed copy-trading return.

SEC 0001591747-26-000009 ↗SEC 0001591747-26-000009 ↗SEC 0001591747-26-000009 ↗

Recent Form 4 activity

Inspect all 31 displayed rows: Recent Form 4 activity

Scroll sideways to compare all columns. Select a heading to sort.

2026-10-212026-10-21Bitterman KevinS266Not reported
2026-10-212026-10-21Bitterman KevinS11,470Not reported
2026-10-212026-10-21Bitterman KevinS13,783Not reported
2026-10-212026-10-20Bitterman KevinS55Not reported
2026-10-212026-10-20Bitterman KevinS2,388Not reported
2026-10-212026-10-20Bitterman KevinS2,869Not reported
2026-10-212026-10-19Bitterman KevinS115Not reported
2026-10-212026-10-19Bitterman KevinS4,942Not reported
2026-10-212026-10-19Bitterman KevinS5,937Not reported
2026-09-152026-09-11Bitterman KevinS27,136Not reported
2026-09-092026-09-04Bitterman KevinS18Not reported
2026-09-092026-09-04Bitterman KevinS759Not reported
2026-09-092026-09-04Bitterman KevinS912Not reported
2026-09-042026-09-03Bitterman KevinS54Not reported
2026-09-042026-09-03Bitterman KevinS2,339Not reported
2026-09-042026-09-03Bitterman KevinS2,810Not reported
2026-09-042026-09-02Bitterman KevinS2Not reported
2026-09-042026-09-02Bitterman KevinS9Not reported
2026-09-042026-09-02Bitterman KevinS10Not reported
2026-09-042026-09-02Bitterman KevinS511Not reported
2026-09-042026-09-02Bitterman KevinS22,090Not reported
2026-09-042026-09-02Bitterman KevinS26,542Not reported
2026-09-042026-09-01Bitterman KevinS1Not reported
2026-09-042026-09-01Bitterman KevinS58Not reported
2026-09-042026-09-01Bitterman KevinS70Not reported
2026-08-272026-08-25Yu Jonathan Yen-WenS8,796Not reported
2026-08-272026-08-24Yu Jonathan Yen-WenS300Not reported
2026-08-192026-08-17Quisel John DS11,888Not reported
2026-08-192026-08-17Quisel John DS12,712Not reported
2026-08-192026-08-17Quisel John DS8,400Not reported
2026-08-152026-08-12Yu Jonathan Yen-WenS804Not reported

90-day public availability window, up to 50 records.

Recent institutional filing receipts

Inspect all 50 displayed rows: Recent institutional filing receipts

These are raw ticker-matched positions in recent 13F receipts, including amendments. They are not deduplicated current ownership totals. Open the manager profile to inspect its effective filing book.

Scroll sideways to compare all columns. Select a heading to sort.

Cornerstone Financial Management LLC2026-06-302026-08-2911$805None
Cornerstone Financial Management LLC2026-03-312026-08-2911$703None
Cornerstone Financial Management LLC2025-12-312026-08-2911$874None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-2539,360$2,878,790None
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM2026-06-302026-08-252,878,790$39,360,000None
Assenagon Asset Management S.A.2026-06-302026-08-22384,158$28,097,316None
Palo Alto Investors LP2026-06-302026-08-20416,646$30,473,488None
Palo Alto Investors LP2026-06-302026-08-19416,646$30,473,488None
Ensign Peak Advisors, Inc2026-03-312026-08-19191,487$12,243,679None
Ensign Peak Advisors, Inc2025-12-312026-08-19177,050$14,059,541None
Ensign Peak Advisors, Inc2025-09-302026-08-19177,050$11,699,464None
Palo Alto Investors LP2026-06-302026-08-18416,646$30,473,488None
CAPSTONE INVESTMENT ADVISORS, LLC2026-06-302026-08-183,355$245,385None
TORONTO DOMINION BANK2026-06-302026-08-15198$14,482None
SummitTX Capital, L.P.2026-06-302026-08-156,309$461,440None
Squadron Capital Management LLC2026-06-302026-08-1530,000$2,194,200Call
SEI INVESTMENTS CO2026-06-302026-08-1512,633$923,978None
SEI INVESTMENTS CO2026-06-302026-08-1514$1,030None
JPL Wealth Management, LLC2026-06-302026-08-1517$1,244None
Rafferty Asset Management, LLC2026-06-302026-08-1526,566$1,943,037None
Susquehanna Portfolio Strategies, LLC2026-06-302026-08-155,808$424,797None
Checkpoint Capital L.P.2026-06-302026-08-15240,125$17,562,743None
Vestal Point Capital, LP2026-06-302026-08-151,550,000$113,367,000None
Quarry LP2026-06-302026-08-1518$1,317None
Saturn V Capital Management LP2026-06-302026-08-15524,730$38,378,752None
Catalio Capital Management, LP2026-06-302026-08-15159,384$11,657,346None
Frazier Life Sciences Management, L.P.2026-06-302026-08-151,354,852$99,093,875None
Octagon Capital Advisors LP2026-06-302026-08-15270,000$19,747,800None
XTX Topco Ltd2026-06-302026-08-1556,710$4,147,769None
CHARLES SCHWAB INVESTMENT MANAGEMENT INC2026-06-302026-08-15257,382$18,824,919None
Sixth Street Partners Management Company, L.P.2026-06-302026-08-15257,382$18,824,919None
ExodusPoint Capital Management, LP2026-06-302026-08-1551,623$3,775,706None
Qube Research & Technologies Ltd2026-06-302026-08-1512,758$933,120None
Caption Management, LLC2026-06-302026-08-15150,000$10,971,000Call
OSAIC HOLDINGS, INC.2026-06-302026-08-1549$3,584None
OSAIC HOLDINGS, INC.2026-06-302026-08-15219$16,018None
Squarepoint Ops LLC2026-06-302026-08-1575,872$5,549,278None
Man Group plc2026-06-302026-08-1514,925$1,091,615None
Trexquant Investment LP2026-06-302026-08-15107,699$7,877,105None
MetLife Investment Management, LLC2026-06-302026-08-1516,588$1,213,246None
Engineers Gate Manager LP2026-06-302026-08-1519,552$1,430,033None
JANE STREET GROUP, LLC2026-06-302026-08-1515,969$1,167,973None
JANE STREET GROUP, LLC2026-06-302026-08-1542$3,072None
JANE STREET GROUP, LLC2026-06-302026-08-157,200$526,608Put
JANE STREET GROUP, LLC2026-06-302026-08-159,100$665,574Call
EVENTIDE ASSET MANAGEMENT, LLC2026-06-302026-08-15395,651$28,938,480None
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-154,000$292,560Put
BOOTHBAY FUND MANAGEMENT, LLC2026-06-302026-08-154,000$292,560Call
SPHERA FUNDS MANAGEMENT LTD.2026-06-302026-08-1563,538$4,647,169None
Legal & General Group Plc2026-06-302026-08-1511,462$838,331None

90-day public filing window, up to 50 source positions.

Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗Cornerstone Financial Management LLC ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM ↗Assenagon Asset Management S.A. ↗Palo Alto Investors LP ↗Palo Alto Investors LP ↗Ensign Peak Advisors, Inc ↗Ensign Peak Advisors, Inc ↗

Recent Congressional disclosures

No matching Congressional transactions were returned in this source preview.

Show the table · 0 rows, 5 columns

Scroll sideways to compare all columns. Select a heading to sort.

No records are available for this view.

Bounded public source preview, up to 25 disclosed events.

How to read the disclosure dates

The tables report different things: insider transactions, institutional positions and Congressional transaction ranges. Read each table with its source dates and units. They cannot be added into a combined ownership percentage.

  1. Company insiders

    SEC Form 4 purchases, sales and awards report transactions and their public filing availability.

  2. Institutional managers

    13F reports disclose delayed quarter-end positions. They are not a record of trades between quarters.

  3. Congressional filers

    Periodic transaction reports disclose transaction dates and amount brackets. Public filing dates determine what researchers could know.

Institutional source directory ↗Congressional source directory ↗

Read the transaction codes

Awards use transaction code A, purchases P and sales S. An acquisition from an award is not the same as an open-market purchase. Joint filers may share a transaction. Use original receipts and availability dates to interpret the events.