Altimmune Inc (172670)

Altimmune Inc. recorded two insider trading transactions over the past ninety days, both representing buy orders. These acquisitions occurred following the August 2026 results financiers, which exceeded expectations by twenty percent. The stock price has appreciated 16.7% during this period, reflecting positive market sentiment as leadership continues accumulating equity positions.
Ticker: 172670 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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Insider trades have triggered activity signals for Altimmune Inc. Upgrade to see score, net flow, insiders and the full signal context.

Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
CHUN BYUNG TAE (천병태) Representative Director (대표이사) Executive Director Large shareholder
Transaction date
Purchase
Price
204.68
Quantity 70,791 +31.2%
Value ₩3,111,292
1.9
Durso Jerome Benedict President and CEO Executive Director
Transaction date
Purchase
Price
170.57
Quantity 27,835 -45.5%
Value US$1,566,566
2.5
GILL JOHN Non-Executive Director
Transaction date
Purchase
Price
407.73
Quantity 14,091 +47.9%
Value US$2,736,292
1.9
Durso Jerome Benedict President and CEO Executive Director
Transaction date
Purchase
Price
3.14
Quantity 15,000 +46.2%
Value US$47,100
1.5
WEAVER GREGORY L Chief Financial Officer Officer
Transaction date
Purchase
Price
3.15
Quantity 10,000 +35.6%
Value US$31,499
1.5
WEAVER GREGORY L Chief Financial Officer Officer
Transaction date
Purchase
Price
3.54
Quantity 5,000 +21.7%
Value US$17,700
1.9
Durso Jerome Benedict President and CEO Executive Director
Transaction date
Purchase
Price
3.54
Quantity 20,000 +160.0%
Value US$70,790
2.9
Pisano Wayne Non-Executive Director
Transaction date
Purchase
Price
4.08
Quantity 5,000 +58.8%
Value US$20,410
3.2
Sohn Catherine A. Non-Executive Director
Transaction date
Purchase
Price
4.24
Quantity 500 +50.0%
Value US$2,118
1.5
Jorkasky Diane Non-Executive Director
Transaction date
Purchase
Price
3.80
Quantity 527 New position
Value US$2,003
2.5
GILL JOHN Non-Executive Director
Transaction date
Purchase
Price
4.10
Quantity 12,500 New position
Value US$51,250
1.9
Durso Jerome Benedict Non-Executive Director
Transaction date
Purchase
Price
4.13
Quantity 12,500 New position
Value US$51,569
3.2
Sohn Catherine A. Non-Executive Director
Transaction date
Purchase
Price
5.78
Quantity 1,000 New position
Value US$5,784
1.5
WEAVER GREGORY L Chief Financial Officer Officer
Transaction date
Purchase
Price
5.20
Quantity 10,000 New position
Value US$51,996
3.0
Drutz David Non-Executive Director
Transaction date
Sale
Price
6.88
Quantity 8,184 -12.8%
Value US$56,306
3.0
Drutz David Non-Executive Director
Transaction date
Sale
Price
6.93
Quantity 7,827 -15.7%
Value US$54,241
3.0
Drutz David Non-Executive Director
Transaction date
Purchase
Price
2.88
Quantity 300 +1.0%
Value US$862
1.7
Eisenstadt Richard I Chief Financial Officer Officer
Transaction date
Purchase
Price
4.31
Quantity 10,000 +83.3%
Value US$43,140
3.0
Drutz David Non-Executive Director
Transaction date
Purchase
Price
4.27
Quantity 9,000 +43.9%
Value US$38,430
1.7
Harris Matthew Scott Chief Medical Officer Officer
Transaction date
Purchase
Price
4.22
Quantity 10,000 +42.9%
Value US$42,200
2.9
Pisano Wayne Non-Executive Director
Transaction date
Planned sale
Price
15.01
Quantity 20,000 -70.2%
Value US$300,268
1.4
Garg Vipin K President and CEO Executive Director
Transaction date
Planned sale
Price
20.02
Quantity 20,000 -7.8%
Value US$400,322
2.5
GILL JOHN Non-Executive Director
Transaction date
Sale
Price
15.00
Quantity 2,714 -49.5%
Value US$40,710
1.4
Garg Vipin K President and CEO Executive Director
Transaction date
Planned sale
Price
15.06
Quantity 15,000 -5.5%
Value US$225,890
Roberts M Scot Chief Scientific Officer Officer
Transaction date
Planned sale
Price
12.00
Quantity 10,182 -55.1%
Value US$122,184
Roberts M Scot Chief Scientific Officer Officer
Transaction date
Planned sale
Price
12.00
Quantity 26,982 -60.4%
Value US$323,784
Roberts M Scot Chief Scientific Officer Officer
Transaction date
Planned sale
Price
12.00
Quantity 37,352 -67.8%
Value US$448,254
1.5
Jorkasky Diane Non-Executive Director
Transaction date
Planned sale
Price
11.75
Quantity 17,610 -100.0%
Value US$206,944
3.0
Drutz David Non-Executive Director
Transaction date
Purchase
Price
8.00
Quantity 1,000 +5.3%
Value US$8,000
3.0
Drutz David Non-Executive Director
Transaction date
Purchase
Price
4.50
Quantity 1,200 +6.7%
Value US$5,400
1.7
Harris Matthew Scott Chief Medical Officer Officer
Transaction date
Planned sale
Price
7.52
Quantity 30,000 -72.2%
Value US$225,600
Hodges Philip Non-Executive Director
Transaction date
Planned sale
Price
16.08
Quantity 6,000 -40.7%
Value US$96,480
3.1
Schafer Klaus Non-Executive Director
Transaction date
Purchase
Price
11.99
Quantity 2,000 +29.0%
Value US$23,980
Hodges Philip Non-Executive Director
Transaction date
Planned sale
Price
13.54
Quantity 1,227 -100.0%
Value US$16,614
2.5
GILL JOHN Non-Executive Director
Transaction date
Planned sale
Price
11.92
Quantity 8,425 -42.9%
Value US$100,426
Hodges Philip Non-Executive Director
Transaction date
Planned sale
Price
12.00
Quantity 2,500 -14.5%
Value US$30,000
3.1
Schafer Klaus Non-Executive Director
Transaction date
Planned sale
Price
9.91
Quantity 10,150 -59.5%
Value US$100,586
2.9
Pisano Wayne Non-Executive Director
Transaction date
Planned sale
Price
9.90
Quantity 10,352 -54.9%
Value US$102,485
1.7
Harris Matthew Scott Non-Executive Director
Transaction date
Planned sale
Price
10.02
Quantity 4,015 -49.7%
Value US$40,230
1.4
Garg Vipin K President and CEO Executive Director
Transaction date
Purchase
Price
2.10
Quantity 20,000 +6.2%
Value US$42,000
Pisano Wayne Non-Executive Director
Transaction date
Purchase
Price
4.59
Quantity 2,000 New position
Value US$9,180
Enright William President and CEO Executive Director
Transaction date
Purchase
Price
0.51
Quantity 1,300 +0.4%
Value US$660
SAYARE MITCHEL Non-Executive Director
Transaction date
Purchase
Price
1.95
Quantity 5,100 +18.5%
Value US$9,963
SCHAFFER DERACE L Non-Executive Director
Transaction date
Purchase
Price
1.93
Quantity 38,699 +7.0%
Value US$74,778
SCHAFFER DERACE L Non-Executive Director
Transaction date
Purchase
Price
1.92
Quantity 58,711 +11.9%
Value US$112,672
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.77
Quantity 27,706 +6.0%
Value US$49,040
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.76
Quantity 50,000 +12.1%
Value US$88,170
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.81
Quantity 51,442 +14.2%
Value US$93,269
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.61
Quantity 17,982 +5.2%
Value US$28,877
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.74
Quantity 7,639 +2.3%
Value US$13,308
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.80
Quantity 16,106 +5.0%
Value US$28,996
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.78
Quantity 13,495 +4.4%
Value US$23,987
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.81
Quantity 7,300 +2.4%
Value US$13,195
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.80
Quantity 5,215 +1.8%
Value US$9,405
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.84
Quantity 12,978 +4.6%
Value US$23,816
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.94
Quantity 7,942 +2.9%
Value US$15,377
SCHAFFER DERACE L
Transaction date
Purchase
Price
1.97
Quantity 12,395 +4.7%
Value US$24,445
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.00
Quantity 10,042 +4.0%
Value US$20,060
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.02
Quantity 6,505 +2.7%
Value US$13,162
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.10
Quantity 5,261 +2.2%
Value US$11,061
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.06
Quantity 7,236 +3.1%
Value US$14,905
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.07
Quantity 4,800 +2.1%
Value US$9,958
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.12
Quantity 6,295 +2.8%
Value US$13,352
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.25
Quantity 50,000 +29.1%
Value US$112,390
SCHAFFER DERACE L
Transaction date
Purchase
Price
2.24
Quantity 17,326 +11.2%
Value US$38,892
Drutz David
Transaction date
Purchase
Price
2.27
Quantity 5,000 +19.4%
Value US$11,340
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2026-09-09 2026-09-07 B Purchase CHUN BYUNG TAE (천병태)

Representative Director (대표이사)

Executive Director Large shareholder
70,791 +31.2%
204.68
₩3,111,292
70,791 +31.2% 204.68 ₩3,111,292
2026-08-13 2026-08-13 B Purchase

President and CEO

Executive Director
27,835 -45.5%
170.57
US$1,566,566
27,835 -45.5% 170.57 US$1,566,566
2026-04-06 2026-04-06 B Purchase Non-Executive Director
14,091 +47.9%
407.73
US$2,736,292
14,091 +47.9% 407.73 US$2,736,292
2026-04-01 2026-04-01 B Purchase

President and CEO

Executive Director
15,000 +46.2%
3.14
US$47,100
15,000 +46.2% 3.14 US$47,100
2026-04-01 2026-04-01 B Purchase

Chief Financial Officer

Officer
10,000 +35.6%
3.15
US$31,499
10,000 +35.6% 3.15 US$31,499
2026-03-09 2026-03-06 B Purchase

Chief Financial Officer

Officer
5,000 +21.7%
3.54
US$17,700
5,000 +21.7% 3.54 US$17,700
2026-03-09 2026-03-06 B Purchase

President and CEO

Executive Director
20,000 +160.0%
3.54
US$70,790
20,000 +160.0% 3.54 US$70,790
2026-01-09 2026-01-08 B Purchase Non-Executive Director
5,000 +58.8%
4.08
US$20,410
5,000 +58.8% 4.08 US$20,410
2026-01-05 2026-01-05 B Purchase Non-Executive Director
500 +50.0%
4.24
US$2,118
500 +50.0% 4.24 US$2,118
2025-12-29 2025-12-29 B Purchase Non-Executive Director
527 New position
3.80
US$2,003
527 New position 3.80 US$2,003
2025-12-23 2025-12-23 B Purchase Non-Executive Director
12,500 New position
4.10
US$51,250
12,500 New position 4.10 US$51,250
2025-12-22 2025-12-22 B Purchase Non-Executive Director
12,500 New position
4.13
US$51,569
12,500 New position 4.13 US$51,569
2025-03-18 2025-03-17 B Purchase Non-Executive Director
1,000 New position
5.78
US$5,784
1,000 New position 5.78 US$5,784
2025-03-14 2025-03-13 B Purchase

Chief Financial Officer

Officer
10,000 New position
5.20
US$51,996
10,000 New position 5.20 US$51,996
2024-08-20 2024-08-19 S Sale Non-Executive Director
8,184 -12.8%
6.88
US$56,306
8,184 -12.8% 6.88 US$56,306
2024-08-20 2024-08-19 S Sale Non-Executive Director
7,827 -15.7%
6.93
US$54,241
7,827 -15.7% 6.93 US$54,241
2023-08-15 2023-08-15 B Purchase Non-Executive Director
300 +1.0%
2.88
US$862
300 +1.0% 2.88 US$862
2023-03-24 2023-03-24 B Purchase

Chief Financial Officer

Officer
10,000 +83.3%
4.31
US$43,140
10,000 +83.3% 4.31 US$43,140
2023-03-27 2023-03-23 B Purchase Non-Executive Director
9,000 +43.9%
4.27
US$38,430
9,000 +43.9% 4.27 US$38,430
2023-03-23 2023-03-23 B Purchase

Chief Medical Officer

Officer
10,000 +42.9%
4.22
US$42,200
10,000 +42.9% 4.22 US$42,200
2022-12-22 2022-12-22 PlS Planned sale Non-Executive Director
20,000 -70.2%
15.01
US$300,268
20,000 -70.2% 15.01 US$300,268
2022-09-01 2022-08-31 PlS Planned sale

President and CEO

Executive Director
20,000 -7.8%
20.02
US$400,322
20,000 -7.8% 20.02 US$400,322
2023-07-06 2022-08-12 S Sale Non-Executive Director
2,714 -49.5%
15.00
US$40,710
2,714 -49.5% 15.00 US$40,710
2022-08-12 2022-08-12 PlS Planned sale

President and CEO

Executive Director
15,000 -5.5%
15.06
US$225,890
15,000 -5.5% 15.06 US$225,890
2022-07-05 2022-07-05 PlS Planned sale

Chief Scientific Officer

Officer
10,182 -55.1%
12.00
US$122,184
10,182 -55.1% 12.00 US$122,184
2022-07-05 2022-07-01 PlS Planned sale

Chief Scientific Officer

Officer
26,982 -60.4%
12.00
US$323,784
26,982 -60.4% 12.00 US$323,784
2022-06-28 2022-06-27 PlS Planned sale

Chief Scientific Officer

Officer
37,352 -67.8%
12.00
US$448,254
37,352 -67.8% 12.00 US$448,254
2022-06-28 2022-06-27 PlS Planned sale Non-Executive Director
17,610 -100.0%
11.75
US$206,944
17,610 -100.0% 11.75 US$206,944
2022-06-16 2022-06-15 B Purchase Non-Executive Director
1,000 +5.3%
8.00
US$8,000
1,000 +5.3% 8.00 US$8,000
2022-05-25 2022-05-24 B Purchase Non-Executive Director
1,200 +6.7%
4.50
US$5,400
1,200 +6.7% 4.50 US$5,400
2022-03-02 2022-02-28 PlS Planned sale

Chief Medical Officer

Officer
30,000 -72.2%
7.52
US$225,600
30,000 -72.2% 7.52 US$225,600
2021-03-01 2021-03-01 PlS Planned sale Non-Executive Director
6,000 -40.7%
16.08
US$96,480
6,000 -40.7% 16.08 US$96,480
2020-12-11 2020-12-10 B Purchase Non-Executive Director
2,000 +29.0%
11.99
US$23,980
2,000 +29.0% 11.99 US$23,980
2020-12-02 2020-12-01 PlS Planned sale Non-Executive Director
1,227 -100.0%
13.54
US$16,614
1,227 -100.0% 13.54 US$16,614
2020-12-02 2020-11-30 PlS Planned sale Non-Executive Director
8,425 -42.9%
11.92
US$100,426
8,425 -42.9% 11.92 US$100,426
2020-12-02 2020-11-30 PlS Planned sale Non-Executive Director
2,500 -14.5%
12.00
US$30,000
2,500 -14.5% 12.00 US$30,000
2020-11-13 2020-11-12 PlS Planned sale Non-Executive Director
10,150 -59.5%
9.91
US$100,586
10,150 -59.5% 9.91 US$100,586
2020-11-13 2020-11-12 PlS Planned sale Non-Executive Director
10,352 -54.9%
9.90
US$102,485
10,352 -54.9% 9.90 US$102,485
2020-11-13 2020-11-12 PlS Planned sale Non-Executive Director
4,015 -49.7%
10.02
US$40,230
4,015 -49.7% 10.02 US$40,230
2020-06-15 2020-06-15 B Purchase Large shareholder
1,500,000 +50.0%
7.54
US$11,310,000
1,500,000 +50.0% 7.54 US$11,310,000
2020-05-28 2020-05-28 B Purchase Large shareholder
173,711 +6.1%
8.87
US$1,540,817
173,711 +6.1% 8.87 US$1,540,817
2020-05-28 2020-05-28 B Purchase Large shareholder
27,763 +1.0%
7.79
US$216,274
27,763 +1.0% 7.79 US$216,274
2020-05-28 2020-05-27 B Purchase Large shareholder
277,000 +11.0%
7.92
US$2,193,840
277,000 +11.0% 7.92 US$2,193,840
2020-05-28 2020-05-27 B Purchase Large shareholder
125,162 +5.2%
7.23
US$904,921
125,162 +5.2% 7.23 US$904,921
2020-05-28 2020-05-26 B Purchase Large shareholder
390,547 +19.5%
9.78
US$3,819,550
390,547 +19.5% 9.78 US$3,819,550
2020-05-28 2020-05-26 B Purchase Large shareholder
309,453 +18.2%
8.79
US$2,720,092
309,453 +18.2% 8.79 US$2,720,092
2020-05-18 2020-05-15 S Sale Large shareholder
30,622 -1.8%
4.65
US$142,392
30,622 -1.8% 4.65 US$142,392
2020-05-18 2020-05-14 S Sale Large shareholder
169,378 -9.0%
4.81
US$814,708
169,378 -9.0% 4.81 US$814,708
2019-09-05 2019-09-05 B Purchase

President and CEO

Executive Director
20,000 +6.2%
2.10
US$42,000
20,000 +6.2% 2.10 US$42,000
2018-10-11 2018-10-09 B Purchase Pisano Wayne Non-Executive Director
2,000 New position
4.59
US$9,180
2,000 New position 4.59 US$9,180
2018-05-29 2018-05-25 B Purchase Enright William

President and CEO

Executive Director
1,300 +0.4%
0.51
US$660
1,300 +0.4% 0.51 US$660
2018-01-03 2017-12-29 B Purchase SAYARE MITCHEL Non-Executive Director
5,100 +18.5%
1.95
US$9,963
5,100 +18.5% 1.95 US$9,963
2018-01-02 2017-12-29 B Purchase SCHAFFER DERACE L Non-Executive Director
38,699 +7.0%
1.93
US$74,778
38,699 +7.0% 1.93 US$74,778
2018-01-02 2017-12-28 B Purchase SCHAFFER DERACE L Non-Executive Director
58,711 +11.9%
1.92
US$112,672
58,711 +11.9% 1.92 US$112,672
2017-12-27 2017-12-27 B Purchase SCHAFFER DERACE L
27,706 +6.0%
1.77
US$49,040
27,706 +6.0% 1.77 US$49,040
2017-12-27 2017-12-27 B Purchase SCHAFFER DERACE L
50,000 +12.1%
1.76
US$88,170
50,000 +12.1% 1.76 US$88,170
2017-12-27 2017-12-26 B Purchase SCHAFFER DERACE L
51,442 +14.2%
1.81
US$93,269
51,442 +14.2% 1.81 US$93,269
2017-12-27 2017-12-22 B Purchase SCHAFFER DERACE L
17,982 +5.2%
1.61
US$28,877
17,982 +5.2% 1.61 US$28,877
2017-12-08 2017-12-07 B Purchase SCHAFFER DERACE L
7,639 +2.3%
1.74
US$13,308
7,639 +2.3% 1.74 US$13,308
2017-12-08 2017-12-06 B Purchase SCHAFFER DERACE L
16,106 +5.0%
1.80
US$28,996
16,106 +5.0% 1.80 US$28,996
2017-12-05 2017-12-05 B Purchase SCHAFFER DERACE L
13,495 +4.4%
1.78
US$23,987
13,495 +4.4% 1.78 US$23,987
2017-12-05 2017-12-04 B Purchase SCHAFFER DERACE L
7,300 +2.4%
1.81
US$13,195
7,300 +2.4% 1.81 US$13,195
2017-12-05 2017-12-01 B Purchase SCHAFFER DERACE L
5,215 +1.8%
1.80
US$9,405
5,215 +1.8% 1.80 US$9,405
2017-11-30 2017-11-30 B Purchase SCHAFFER DERACE L
12,978 +4.6%
1.84
US$23,816
12,978 +4.6% 1.84 US$23,816
2017-11-30 2017-11-29 B Purchase SCHAFFER DERACE L
7,942 +2.9%
1.94
US$15,377
7,942 +2.9% 1.94 US$15,377
2017-11-30 2017-11-28 B Purchase SCHAFFER DERACE L
12,395 +4.7%
1.97
US$24,445
12,395 +4.7% 1.97 US$24,445
2017-11-27 2017-11-27 B Purchase SCHAFFER DERACE L
10,042 +4.0%
2.00
US$20,060
10,042 +4.0% 2.00 US$20,060
2017-11-27 2017-11-24 B Purchase SCHAFFER DERACE L
6,505 +2.7%
2.02
US$13,162
6,505 +2.7% 2.02 US$13,162
2017-11-27 2017-11-22 B Purchase SCHAFFER DERACE L
5,261 +2.2%
2.10
US$11,061
5,261 +2.2% 2.10 US$11,061
2017-11-21 2017-11-21 B Purchase SCHAFFER DERACE L
7,236 +3.1%
2.06
US$14,905
7,236 +3.1% 2.06 US$14,905
2017-11-21 2017-11-20 B Purchase SCHAFFER DERACE L
4,800 +2.1%
2.07
US$9,958
4,800 +2.1% 2.07 US$9,958
2017-11-21 2017-11-17 B Purchase SCHAFFER DERACE L
6,295 +2.8%
2.12
US$13,352
6,295 +2.8% 2.12 US$13,352
2017-08-28 2017-08-25 B Purchase SCHAFFER DERACE L
50,000 +29.1%
2.25
US$112,390
50,000 +29.1% 2.25 US$112,390
2017-08-28 2017-08-24 B Purchase SCHAFFER DERACE L
17,326 +11.2%
2.24
US$38,892
17,326 +11.2% 2.24 US$38,892
2017-08-24 2017-08-23 B Purchase Drutz David
5,000 +19.4%
2.27
US$11,340
5,000 +19.4% 2.27 US$11,340

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