United States Biotechnology & Medical Research

Disc Medicine, Inc. (IRON)

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Disc Medicine experienced significant selling activity over the past ninety days, totaling approximately 1.9 million dollars in net value. Major shareholders, including Atlas Venture entities, alongside officer Kevin Bitterman, executed multiple planned divestments. These transactions occurred following the July earnings report, as the stock price maintained a moderate upward trend within its annual range.
Ticker: IRON Exchange: NMS
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• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
145.52
Quantity 82,545 -18.3%
Value US$1,052,111
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
328.81
Quantity 9,906 -3.5%
Value US$4,154,678
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
279.05
Quantity 40,010 -36.7%
Value US$652,083
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.95
Quantity 1,000 -0.4%
Value US$100,000
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.95
Quantity 1,000 -0.8%
Value US$100,000
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.95
Quantity 1,000 -0.9%
Value US$100,000
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.97
Quantity 1,000 -0.9%
Value US$100,000
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.97
Quantity 1,000 -1.6%
Value US$100,000
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.97
Quantity 1,000 -1.9%
Value US$100,000
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Sale
Price
70.11
Quantity 27,136 -100.0%
Value US$1,902,505
3.9
KEVIN J BITTERMAN Officer Officer
Transaction date
Proposed sale
Price
70.11
Quantity 27,136
Value US$1,902,505
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.96
Quantity 18 -0.1%
Value US$1,439
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.96
Quantity 759 -0.2%
Value US$60,690
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.96
Quantity 912 -0.3%
Value US$72,924
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.98
Quantity 54 -0.4%
Value US$4,319
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.98
Quantity 2,339 -0.7%
Value US$187,073
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.98
Quantity 2,810 -0.9%
Value US$224,744
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
80.98
Quantity 2 -0.0%
Value US$162
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
80.98
Quantity 9 -0.0%
Value US$729
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
80.98
Quantity 10 -0.0%
Value US$810
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
80.17
Quantity 511 -3.6%
Value US$40,967
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
80.17
Quantity 22,090 -6.5%
Value US$1,770,955
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
80.17
Quantity 26,542 -7.6%
Value US$2,127,872
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.95
Quantity 1 -0.0%
Value US$80
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.95
Quantity 58 -0.0%
Value US$4,637
3.9
Bitterman Kevin Non-Executive Director
Transaction date
Planned sale
Price
79.95
Quantity 70 -0.0%
Value US$5,596
2.5
Yu Jonathan Yen-Wen Chief Operating Officer Officer
Transaction date
Planned sale
Price
83.12
Quantity 8,796 -13.9%
Value US$731,092
2.5
Yu Jonathan Yen-Wen Chief Operating Officer Officer
Transaction date
Planned sale
Price
82.53
Quantity 300 -0.5%
Value US$24,760
2.4
Quisel John D Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
79.84
Quantity 11,888 -5.0%
Value US$949,162
2.4
Quisel John D Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
79.20
Quantity 12,712 -5.1%
Value US$1,006,729
2.4
Quisel John D Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
78.11
Quantity 8,400 -3.2%
Value US$656,091
2.4
JOHN QUISEL Director; Officer Executive Director
Transaction date
Proposed sale
Price
78.84
Quantity 33,000
Value US$2,601,720
2.5
Yu Jonathan Yen-Wen Chief Operating Officer Officer
Transaction date
Planned sale
Price
82.64
Quantity 804 -1.5%
Value US$66,445
1.6
Khara Rahul Chief Legal Officer Officer
Transaction date
Planned sale
Price
80.00
Quantity 5,000 -8.7%
Value US$400,000
1.6
RAHUL KHARA Officer Officer
Transaction date
Proposed sale
Price
78.91
Quantity 5,000
Value US$394,550
2.4
Quisel John D Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
76.05
Quantity 6,400 -2.8%
Value US$486,733
2.4
Quisel John D Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
74.95
Quantity 16,896 -6.8%
Value US$1,266,303
2.4
Quisel John D Chief Executive Officer Executive Director
Transaction date
Planned sale
Price
74.27
Quantity 9,704 -3.7%
Value US$720,744
2.4
JOHN QUISEL Director; Officer Executive Director
Transaction date
Proposed sale
Price
76.59
Quantity 33,000
Value US$2,527,470
2.5
Yu Jonathan Yen-Wen Chief Operating Officer Officer
Transaction date
Planned sale
Price
82.50
Quantity 100 -0.2%
Value US$8,250
2.5
JONATHAN YU Officer Officer
Transaction date
Proposed sale
Price
77.01
Quantity 10,000
Value US$770,100
1.6
Khara Rahul Chief Legal Officer Officer
Transaction date
Planned sale
Price
75.00
Quantity 1,649 -3.1%
Value US$123,675
1.6
Khara Rahul Chief Legal Officer Officer
Transaction date
Planned sale
Price
75.00
Quantity 851 -1.6%
Value US$63,825
2.5
Yu Jonathan Yen-Wen Chief Operating Officer Officer
Transaction date
Planned sale
Price
72.50
Quantity 300 -0.5%
Value US$21,750
1.6
RAHUL KHARA Officer Officer
Transaction date
Proposed sale
Price
70.16
Quantity 2,500
Value US$175,400
2.5
Yu Jonathan Yen-Wen Chief Operating Officer Officer
Transaction date
Planned sale
Price
72.66
Quantity 9,700 -15.2%
Value US$704,795
2.5
JONATHAN YU Officer Officer
Transaction date
Proposed sale
Price
70.79
Quantity 10,000
Value US$707,900
2.5
JONATHAN YU Officer Officer
Transaction date
Proposed sale
Price
70.79
Quantity 10,000
Value US$707,900
1.6
Khara Rahul Chief Legal Officer Officer
Transaction date
Planned sale
Price
71.62
Quantity 500 -0.9%
Value US$35,811
1.6
Khara Rahul Chief Legal Officer Officer
Transaction date
Planned sale
Price
70.73
Quantity 1,600 -2.9%
Value US$113,161
1.6
Khara Rahul Chief Legal Officer Officer
Transaction date
Planned sale
Price
69.94
Quantity 5,400 -9.0%
Value US$377,688
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-10-21 2026-10-21 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
82,545 -18.3%
145.52
US$1,052,111 		82,545 -18.3% 145.52 US$1,052,111
2026-10-21 2026-10-21 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
9,906 -3.5%
328.81
US$4,154,678 		9,906 -3.5% 328.81 US$4,154,678
2026-10-21 2026-10-21 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
40,010 -36.7%
279.05
US$652,083 		40,010 -36.7% 279.05 US$652,083
2026-10-21 2026-10-21 PrS Proposed sale
Atlas Venture Fund XII, LP

Shareholder
1,000
79.48
US$100,000 		1,000 79.48 US$100,000
2026-10-21 2026-10-21 PrS Proposed sale
3.3
Atlas Venture Fund X, LP

Shareholder
1,000
79.48
US$100,000 		1,000 79.48 US$100,000
2026-10-21 2026-10-21 PrS Proposed sale
3.4
Atlas Venture Opportunity Fund II, LP

Shareholder
1,000
79.48
US$100,000 		1,000 79.48 US$100,000
2026-10-21 2026-10-21 PrS Proposed sale
Atlas Venture Opportunity Fund I, LP

Shareholder
1,000
79.48
US$100,000 		1,000 79.48 US$100,000
2026-10-21 2026-10-20 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1,000 -0.4%
79.95
US$100,000 		1,000 -0.4% 79.95 US$100,000
2026-10-21 2026-10-20 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1,000 -0.8%
79.95
US$100,000 		1,000 -0.8% 79.95 US$100,000
2026-10-21 2026-10-20 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1,000 -0.9%
79.95
US$100,000 		1,000 -0.9% 79.95 US$100,000
2026-10-20 2026-10-20 PrS Proposed sale
3.4
Atlas Venture Opportunity Fund II, LP

Shareholder
1,000
78.93
US$100,000 		1,000 78.93 US$100,000
2026-10-20 2026-10-20 PrS Proposed sale
Atlas Venture Opportunity Fund I, LP

Shareholder
1,000
78.93
US$100,000 		1,000 78.93 US$100,000
2026-10-20 2026-10-20 PrS Proposed sale
Atlas Venture Fund XII, LP

Shareholder
1,000
78.93
US$100,000 		1,000 78.93 US$100,000
2026-10-20 2026-10-20 PrS Proposed sale
3.3
Atlas Venture Fund X, LP

Shareholder
1,000
78.93
US$100,000 		1,000 78.93 US$100,000
2026-10-21 2026-10-19 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1,000 -0.9%
79.97
US$100,000 		1,000 -0.9% 79.97 US$100,000
2026-10-21 2026-10-19 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1,000 -1.6%
79.97
US$100,000 		1,000 -1.6% 79.97 US$100,000
2026-10-21 2026-10-19 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1,000 -1.9%
79.97
US$100,000 		1,000 -1.9% 79.97 US$100,000
2026-10-19 2026-10-19 PrS Proposed sale
3.4
Atlas Venture Opportunity Fund II, LP

Shareholder
1,000
56.84
US$100,000 		1,000 56.84 US$100,000
2026-10-19 2026-10-19 PrS Proposed sale
3.3
Atlas Venture Fund X, LP

Shareholder
1,000
56.84
US$100,000 		1,000 56.84 US$100,000
2026-10-19 2026-10-19 PrS Proposed sale
Atlas Venture Fund XII, LP

Shareholder
1,000
56.84
US$100,000 		1,000 56.84 US$100,000
2026-10-19 2026-10-19 PrS Proposed sale
Atlas Venture Opportunity Fund I, LP

Shareholder
1,000
56.84
US$100,000 		1,000 56.84 US$100,000
2026-09-15 2026-09-11 S Sale
3.9
Bitterman Kevin
Non-Executive Director
27,136 -100.0%
70.11
US$1,902,505 		27,136 -100.0% 70.11 US$1,902,505
2026-09-11 2026-09-11 PrS Proposed sale
3.9
KEVIN J BITTERMAN

Officer

Officer
27,136
70.11
US$1,902,505 		27,136 70.11 US$1,902,505
2026-09-09 2026-09-04 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
18 -0.1%
79.96
US$1,439 		18 -0.1% 79.96 US$1,439
2026-09-09 2026-09-04 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
759 -0.2%
79.96
US$60,690 		759 -0.2% 79.96 US$60,690
2026-09-09 2026-09-04 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
912 -0.3%
79.96
US$72,924 		912 -0.3% 79.96 US$72,924
2026-09-04 2026-09-04 PrS Proposed sale
3.4
Atlas Venture Opportunity Fund II, LP

Shareholder
759
79.37
US$60,242 		759 79.37 US$60,242
2026-09-04 2026-09-04 PrS Proposed sale
Atlas Venture Fund XII, LP

Shareholder
18
79.37
US$1,429 		18 79.37 US$1,429
2026-09-04 2026-09-04 PrS Proposed sale
Atlas Venture Opportunity Fund I, LP

Shareholder
912
79.37
US$72,385 		912 79.37 US$72,385
2026-09-04 2026-09-04 PrS Proposed sale
3.3
Atlas Venture Fund X, LP

Shareholder
2,212
79.37
US$175,566 		2,212 79.37 US$175,566
2026-09-03 2026-09-03 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
54 -0.4%
79.98
US$4,319 		54 -0.4% 79.98 US$4,319
2026-09-03 2026-09-03 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
2,339 -0.7%
79.98
US$187,073 		2,339 -0.7% 79.98 US$187,073
2026-09-03 2026-09-03 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
2,810 -0.9%
79.98
US$224,744 		2,810 -0.9% 79.98 US$224,744
2026-09-03 2026-09-03 PrS Proposed sale
3.3
Atlas Venture Fund X, LP

Shareholder
6,822
80.05
US$546,101 		6,822 80.05 US$546,101
2026-09-03 2026-09-03 PrS Proposed sale
Atlas Venture Fund XII, LP

Shareholder
54
80.05
US$4,323 		54 80.05 US$4,323
2026-09-03 2026-09-03 PrS Proposed sale
3.4
Atlas Venture Opportunity Fund II, LP

Shareholder
2,339
80.05
US$187,237 		2,339 80.05 US$187,237
2026-09-03 2026-09-03 PrS Proposed sale
Atlas Venture Opportunity Fund I, LP

Shareholder
2,810
80.05
US$224,940 		2,810 80.05 US$224,940
2026-09-03 2026-09-02 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
2 -0.0%
80.98
US$162 		2 -0.0% 80.98 US$162
2026-09-03 2026-09-02 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
9 -0.0%
80.98
US$729 		9 -0.0% 80.98 US$729
2026-09-03 2026-09-02 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
10 -0.0%
80.98
US$810 		10 -0.0% 80.98 US$810
2026-09-03 2026-09-02 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
511 -3.6%
80.17
US$40,967 		511 -3.6% 80.17 US$40,967
2026-09-03 2026-09-02 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
22,090 -6.5%
80.17
US$1,770,955 		22,090 -6.5% 80.17 US$1,770,955
2026-09-03 2026-09-02 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
26,542 -7.6%
80.17
US$2,127,872 		26,542 -7.6% 80.17 US$2,127,872
2026-09-02 2026-09-02 PrS Proposed sale
3.3
Atlas Venture Fund X, LP

Shareholder
64,460
78.67
US$5,071,068 		64,460 78.67 US$5,071,068
2026-09-02 2026-09-02 PrS Proposed sale
3.4
Atlas Venture Opportunity Fund II, LP

Shareholder
22,099
78.67
US$1,738,528 		22,099 78.67 US$1,738,528
2026-09-02 2026-09-02 PrS Proposed sale
Atlas Venture Fund XII, LP

Shareholder
513
78.67
US$40,358 		513 78.67 US$40,358
2026-09-02 2026-09-02 PrS Proposed sale
Atlas Venture Opportunity Fund I, LP

Shareholder
26,552
78.67
US$2,088,846 		26,552 78.67 US$2,088,846
2026-09-03 2026-09-01 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
1 -0.0%
79.95
US$80 		1 -0.0% 79.95 US$80
2026-09-03 2026-09-01 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
58 -0.0%
79.95
US$4,637 		58 -0.0% 79.95 US$4,637
2026-09-03 2026-09-01 PlS Planned sale
3.9
Bitterman Kevin
Non-Executive Director
70 -0.0%
79.95
US$5,596 		70 -0.0% 79.95 US$5,596
2026-08-26 2026-08-25 PlS Planned sale
2.5
Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
8,796 -13.9%
83.12
US$731,092 		8,796 -13.9% 83.12 US$731,092
2026-08-26 2026-08-24 PlS Planned sale
2.5
Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
300 -0.5%
82.53
US$24,760 		300 -0.5% 82.53 US$24,760
2026-08-18 2026-08-17 PlS Planned sale
2.4
Quisel John D

Chief Executive Officer

Executive Director
11,888 -5.0%
79.84
US$949,162 		11,888 -5.0% 79.84 US$949,162
2026-08-18 2026-08-17 PlS Planned sale
2.4
Quisel John D

Chief Executive Officer

Executive Director
12,712 -5.1%
79.20
US$1,006,729 		12,712 -5.1% 79.20 US$1,006,729
2026-08-18 2026-08-17 PlS Planned sale
2.4
Quisel John D

Chief Executive Officer

Executive Director
8,400 -3.2%
78.11
US$656,091 		8,400 -3.2% 78.11 US$656,091
2026-08-17 2026-08-17 PrS Proposed sale
2.4
JOHN QUISEL

Director; Officer

Executive Director
33,000
78.84
US$2,601,720 		33,000 78.84 US$2,601,720
2026-08-14 2026-08-12 PlS Planned sale
2.5
Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
804 -1.5%
82.64
US$66,445 		804 -1.5% 82.64 US$66,445
2026-08-07 2026-08-06 PlS Planned sale
1.6
Khara Rahul

Chief Legal Officer

Officer
5,000 -8.7%
80.00
US$400,000 		5,000 -8.7% 80.00 US$400,000
2026-08-06 2026-08-06 PrS Proposed sale
1.6
RAHUL KHARA

Officer

Officer
5,000
78.91
US$394,550 		5,000 78.91 US$394,550
2026-07-14 2026-07-13 PlS Planned sale
2.4
Quisel John D

Chief Executive Officer

Executive Director
6,400 -2.8%
76.05
US$486,733 		6,400 -2.8% 76.05 US$486,733
2026-07-14 2026-07-13 PlS Planned sale
2.4
Quisel John D

Chief Executive Officer

Executive Director
16,896 -6.8%
74.95
US$1,266,303 		16,896 -6.8% 74.95 US$1,266,303
2026-07-14 2026-07-13 PlS Planned sale
2.4
Quisel John D

Chief Executive Officer

Executive Director
9,704 -3.7%
74.27
US$720,744 		9,704 -3.7% 74.27 US$720,744
2026-07-13 2026-07-13 PrS Proposed sale
2.4
JOHN QUISEL

Director; Officer

Executive Director
33,000
76.59
US$2,527,470 		33,000 76.59 US$2,527,470
2026-07-09 2026-07-07 PlS Planned sale
2.5
Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
100 -0.2%
82.50
US$8,250 		100 -0.2% 82.50 US$8,250
2026-07-07 2026-07-07 PrS Proposed sale
2.5
JONATHAN YU

Officer

Officer
10,000
77.01
US$770,100 		10,000 77.01 US$770,100
2026-06-30 2026-06-29 PlS Planned sale
1.6
Khara Rahul

Chief Legal Officer

Officer
1,649 -3.1%
75.00
US$123,675 		1,649 -3.1% 75.00 US$123,675
2026-06-30 2026-06-26 PlS Planned sale
1.6
Khara Rahul

Chief Legal Officer

Officer
851 -1.6%
75.00
US$63,825 		851 -1.6% 75.00 US$63,825
2026-06-30 2026-06-26 PlS Planned sale
2.5
Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
300 -0.5%
72.50
US$21,750 		300 -0.5% 72.50 US$21,750
2026-06-26 2026-06-26 PrS Proposed sale
1.6
RAHUL KHARA

Officer

Officer
2,500
70.16
US$175,400 		2,500 70.16 US$175,400
2026-06-24 2026-06-22 PlS Planned sale
2.5
Yu Jonathan Yen-Wen

Chief Operating Officer

Officer
9,700 -15.2%
72.66
US$704,795 		9,700 -15.2% 72.66 US$704,795
2026-06-22 2026-06-22 PrS Proposed sale
2.5
JONATHAN YU

Officer

Officer
10,000
70.79
US$707,900 		10,000 70.79 US$707,900
2026-06-22 2026-06-22 PrS Proposed sale
2.5
JONATHAN YU

Officer

Officer
10,000
70.79
US$707,900 		10,000 70.79 US$707,900
2026-06-23 2026-06-18 PlS Planned sale
1.6
Khara Rahul

Chief Legal Officer

Officer
500 -0.9%
71.62
US$35,811 		500 -0.9% 71.62 US$35,811
2026-06-23 2026-06-18 PlS Planned sale
1.6
Khara Rahul

Chief Legal Officer

Officer
1,600 -2.9%
70.73
US$113,161 		1,600 -2.9% 70.73 US$113,161
2026-06-23 2026-06-18 PlS Planned sale
1.6
Khara Rahul

Chief Legal Officer

Officer
5,400 -9.0%
69.94
US$377,688 		5,400 -9.0% 69.94 US$377,688
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