Latest filingSep 03, 2026Most recent Form 4
IRON
Disc Medicine, Inc.
NasdaqHealthcarePharmaceutical Preparations
Insider activity for last month from 08/04 to 09/04. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$773M17 sells
Net open-market-$773M3 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period23transactions
- S · Open-market sells · dominant17 · 74%
- M · Option exercise6 · 26%
Activity by reported role
A joint filing can contribute to multiple roles23transactions
- Director · dominant12 · 52%
- COO6 · 26%
- Chief executive officer5 · 22%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (2)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeBitterman KevinCommon Stock · Indirect · See footnote
312,989Sep 03, 2026
Quisel John DCommon Stock · Direct
259,064Aug 17, 2026
Yu Jonathan Yen-WenCommon Stock · Direct
63,120Aug 25, 2026
Yu Jonathan Yen-WenStock Option (Right to Buy) · Direct
13,847Aug 25, 2026
Quisel John DStock Option (Right to Buy) · Direct
91,586Aug 17, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 04 → Sep 04
LessMore
Top insiders
By absolute net value across the selected period- BK-$4.4M
- QD-$2.6M
Recent filing activity
Most recent 12 transactions · color = transaction codeFiling detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
IRON transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 54 | -$431k | S | — | 0.0% | 09/03 | 09/03 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 2.33k | -$18.7M | S | — | 0.0% | 09/03 | 09/03 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 2.81k | -$22.4M | S | — | 0.0% | 09/03 | 09/03 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 2 | -$16.1k | S | — | 0.0% | 09/03 | 09/02 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 9 | -$72.8k | S | — | 0.0% | 09/03 | 09/02 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 10 | -$80.9k | S | — | 0.0% | 09/03 | 09/02 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 511 | -$4.09M | S | — | 0.0% | 09/03 | 09/02 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 22.0k | -$177M | S | — | 0.0% | 09/03 | 09/02 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 26.5k | -$212M | S | — | 0.0% | 09/03 | 09/02 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 1 | -$7.99k | S | — | 0.0% | 09/03 | 09/01 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 58 | -$463k | S | — | 0.0% | 09/03 | 09/01 |
| IRON | Bitterman Kevin | DIR | sale10b5-1 | 70 | -$559k | S | — | 0.0% | 09/03 | 09/01 |
| IRON | Quisel John D | CEO | sale10b5-1 | 11.8k | -$94.9M | S | −1.9% | 08/18 | 08/17 | |
| IRON | Quisel John D | CEO | sale10b5-1 | 12.7k | -$100M | S | −1.9% | 08/18 | 08/17 | |
| IRON | Quisel John D | CEO | sale10b5-1 | 8.40k | -$65.6M | S | −1.9% | 08/18 | 08/17 |
Disc Medicine, Inc. Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at Disc Medicine, Inc.?
Bitterman Kevin, Yu Jonathan Yen-Wen, Quisel John D.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Bitterman Kevin reported a sale on Sep 03, 2026 valued at $431k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $7,735,778.54. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.