United States Biotechnology & Medical Research

Lyell Immunopharma Inc (LYEL)

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Lyell Immunopharma Inc. experienced ten insider trading transactions over the past ninety days, all involving sales totaling approximately 211,300 USD. Key executives, including the CEO and Chief Scientific Officer, offloaded shares following the most recent earnings report. These divestments occurred amid a ten percent decline in stock value over the same period.
Ticker: LYEL Exchange: NSM
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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 Lyell Immunopharma Inc. Upgrade to see score, net flow, insiders and the full signal context.

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Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
3.1
Shook David Chief Medical Officer Officer
Transaction date
Sale
Price
270.41
Quantity 83,194 +0.9%
Value US$1,400,880
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
301.47
Quantity 32,606 +3.1%
Value US$2,323,543
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
16.10
Quantity 20,967 +11.4%
Value US$2,169,914
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
15.54
Quantity 1,457 -8.2%
Value US$22,642
3.9
Bulis Veronica Sanchez VP, Corporate Controller Officer
Transaction date
Sale
Price
14.34
Quantity 621 -4.0%
Value US$8,905
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
14.34
Quantity 131 -0.7%
Value US$1,879
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
14.34
Quantity 89 -0.5%
Value US$1,276
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
14.34
Quantity 390 -0.5%
Value US$5,593
3.1
Shook David Chief Medical Officer Officer
Transaction date
Planned sale
Price
12.64
Quantity 1,977 -8.6%
Value US$24,989
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
18.91
Quantity 388 -0.5%
Value US$7,337
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Planned sale
Price
18.92
Quantity 130 -0.7%
Value US$2,460
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Planned sale
Price
18.92
Quantity 89 -0.5%
Value US$1,684
3.9
Bulis Veronica Sanchez VP, Corporate Controller Officer
Transaction date
Sale
Price
18.91
Quantity 217 -1.4%
Value US$4,103
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
23.39
Quantity 1,236 -6.5%
Value US$28,910
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
23.39
Quantity 7,455 -9.1%
Value US$174,372
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
23.39
Quantity 1,671 -9.0%
Value US$39,085
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
23.12
Quantity 147 -0.8%
Value US$3,399
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
23.12
Quantity 438 -0.5%
Value US$10,127
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
23.12
Quantity 109 -0.6%
Value US$2,520
3.9
Bulis Veronica Sanchez VP, Corporate Controller Officer
Transaction date
Sale
Price
23.12
Quantity 254 -1.6%
Value US$5,872
3.9
Bulis Veronica Sanchez VP, Corporate Controller Officer
Transaction date
Sale
Price
32.32
Quantity 936 -11.6%
Value US$30,252
3.9
Bulis Veronica Sanchez VP, Corporate Controller Officer
Transaction date
Sale
Price
38.67
Quantity 1,136 -12.3%
Value US$43,929
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
16.12
Quantity 95 -0.6%
Value US$1,531
3.9
Bulis Veronica Sanchez VP, Corporate Controller Officer
Transaction date
Sale
Price
16.10
Quantity 239 -2.5%
Value US$3,848
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
16.11
Quantity 412 -0.6%
Value US$6,637
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
16.16
Quantity 138 -0.9%
Value US$2,230
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
10.54
Quantity 7,257 -9.7%
Value US$76,518
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
10.54
Quantity 1,453 -8.6%
Value US$15,320
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
10.54
Quantity 1,004 -6.0%
Value US$10,586
1.5
Newton Charles W. Chief Financial Officer Officer
Transaction date
Sale
Price
10.54
Quantity 1,453 -8.7%
Value US$15,320
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
10.34
Quantity 406 -1.2%
Value US$4,197
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Sale
Price
10.34
Quantity 94 -1.1%
Value US$972
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Sale
Price
10.34
Quantity 136 -1.5%
Value US$1,406
1.5
Newton Charles W. Chief Financial Officer Officer
Transaction date
Sale
Price
10.34
Quantity 136 -1.5%
Value US$1,406
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Sale
Price
10.53
Quantity 391 -1.1%
Value US$4,116
2.5
Hill Stephen J. Chief Operating Officer Officer
Transaction date
Planned sale
Price
10.53
Quantity 91 -1.0%
Value US$958
2.5
Lee Gary K. Chief Scientific Officer Officer
Transaction date
Planned sale
Price
10.53
Quantity 131 -1.4%
Value US$1,379
1.5
Newton Charles W. Chief Financial Officer Officer
Transaction date
Planned sale
Price
10.53
Quantity 131 -1.5%
Value US$1,379
1.4
BRAWLEY OTIS W Non-Executive Director
Transaction date
Purchase
Price
0.56
Quantity 35,640 +inf%
Value US$19,958
0.6
Ramachandra Sumant Non-Executive Director
Transaction date
Purchase
Price
0.58
Quantity 200,000 +inf%
Value US$115,220
1.5
Newton Charles W. Chief Financial Officer Officer
Transaction date
Purchase
Price
0.56
Quantity 200,000 +inf%
Value US$111,620
3.2
Klausner Richard Non-Executive Director
Transaction date
Purchase
Price
0.60
Quantity 158,000 +23.1%
Value US$94,942
2.3
Seely Lynn President and CEO Executive Director
Transaction date
Purchase
Price
0.61
Quantity 175,000 +32.6%
Value US$106,190
3.2
Klausner Richard Non-Executive Director
Transaction date
Sale
Price
2.28
Quantity 58,020 -5.9%
Value US$132,286
3.2
Klausner Richard Director Non-Executive Director
Transaction date
Proposed sale
Price
2.29
Quantity 4,485
Value US$10,271
3.2
Klausner Richard Director Non-Executive Director
Transaction date
Proposed sale
Price
2.29
Quantity 4,485
Value US$10,271
3.2
Klausner Richard Director Non-Executive Director
Transaction date
Proposed sale
Price
2.29
Quantity 44,565
Value US$102,054
3.2
Klausner Richard Director Non-Executive Director
Transaction date
Proposed sale
Price
2.29
Quantity 4,485
Value US$10,271
3.2
Klausner Richard Officer; Director Executive Director
Transaction date
Proposed sale
Price
2.90
Quantity 14,500
Value US$42,050
3.2
Klausner Richard Officer; Director Executive Director
Transaction date
Proposed sale
Price
2.90
Quantity 3,300
Value US$9,570
3.2
Klausner Richard Officer; Director Executive Director
Transaction date
Proposed sale
Price
2.90
Quantity 3,300
Value US$9,570
3.2
Klausner Richard Officer; Director Executive Director
Transaction date
Proposed sale
Price
2.90
Quantity 3,300
Value US$9,570
3.2
Klausner Richard Non-Executive Director
Transaction date
Sale
Price
6.40
Quantity 11,100 -1.1%
Value US$71,041
0.6
FRIEDMAN CATHY Non-Executive Director
Transaction date
Purchase
Price
17.00
Quantity 17,648 +inf%
Value US$300,016
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-09-10 2026-09-10 S Sale
3.1
Shook David

Chief Medical Officer

Officer
83,194 +0.9%
270.41
US$1,400,880 		83,194 +0.9% 270.41 US$1,400,880
2026-08-25 2026-08-21 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
32,606 +3.1%
301.47
US$2,323,543 		32,606 +3.1% 301.47 US$2,323,543
2026-08-25 2026-08-21 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
20,967 +11.4%
16.10
US$2,169,914 		20,967 +11.4% 16.10 US$2,169,914
2026-08-25 2026-08-21 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
1,457 -8.2%
15.54
US$22,642 		1,457 -8.2% 15.54 US$22,642
2026-08-11 2026-08-10 S Sale
3.9
Bulis Veronica Sanchez

VP, Corporate Controller

Officer
621 -4.0%
14.34
US$8,905 		621 -4.0% 14.34 US$8,905
2026-08-11 2026-08-10 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
131 -0.7%
14.34
US$1,879 		131 -0.7% 14.34 US$1,879
2026-08-11 2026-08-10 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
89 -0.5%
14.34
US$1,276 		89 -0.5% 14.34 US$1,276
2026-08-11 2026-08-10 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
390 -0.5%
14.34
US$5,593 		390 -0.5% 14.34 US$5,593
2026-07-20 2026-07-17 S Sale
Innovative Cellular Therapeutics Holdings Ltd
Large shareholder
10 -0.0%
13.70
US$137 		10 -0.0% 13.70 US$137
2026-07-17 2026-07-16 S Sale
Innovative Cellular Therapeutics Holdings Ltd
Large shareholder
10 -0.0%
13.73
US$137 		10 -0.0% 13.73 US$137
2026-06-11 2026-06-10 PlS Planned sale
3.1
Shook David

Chief Medical Officer

Officer
1,977 -8.6%
12.64
US$24,989 		1,977 -8.6% 12.64 US$24,989
2026-06-15 2026-05-11 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
388 -0.5%
18.91
US$7,337 		388 -0.5% 18.91 US$7,337
2026-06-15 2026-05-11 PlS Planned sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
130 -0.7%
18.92
US$2,460 		130 -0.7% 18.92 US$2,460
2026-06-15 2026-05-11 PlS Planned sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
89 -0.5%
18.92
US$1,684 		89 -0.5% 18.92 US$1,684
2026-06-15 2026-05-11 S Sale
3.9
Bulis Veronica Sanchez

VP, Corporate Controller

Officer
217 -1.4%
18.91
US$4,103 		217 -1.4% 18.91 US$4,103
2026-03-09 2026-03-06 B Purchase
ARCH Venture Partners IX, LLC
Large shareholder
488,090 +52.0%
25.61
US$12,499,985 		488,090 +52.0% 25.61 US$12,499,985
2026-03-09 2026-03-06 B Purchase
ARCH Venture Fund XIII, L.P.
Large shareholder
488,090 +52.0%
25.61
US$12,499,985 		488,090 +52.0% 25.61 US$12,499,985
2026-02-12 2026-02-11 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
1,236 -6.5%
23.39
US$28,910 		1,236 -6.5% 23.39 US$28,910
2026-02-12 2026-02-11 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
7,455 -9.1%
23.39
US$174,372 		7,455 -9.1% 23.39 US$174,372
2026-02-12 2026-02-11 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
1,671 -9.0%
23.39
US$39,085 		1,671 -9.0% 23.39 US$39,085
2026-02-11 2026-02-10 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
147 -0.8%
23.12
US$3,399 		147 -0.8% 23.12 US$3,399
2026-02-11 2026-02-10 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
438 -0.5%
23.12
US$10,127 		438 -0.5% 23.12 US$10,127
2026-02-11 2026-02-10 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
109 -0.6%
23.12
US$2,520 		109 -0.6% 23.12 US$2,520
2026-02-11 2026-02-10 S Sale
3.9
Bulis Veronica Sanchez

VP, Corporate Controller

Officer
254 -1.6%
23.12
US$5,872 		254 -1.6% 23.12 US$5,872
2026-01-06 2025-12-30 S Sale
3.9
Bulis Veronica Sanchez

VP, Corporate Controller

Officer
936 -11.6%
32.32
US$30,252 		936 -11.6% 32.32 US$30,252
2026-01-06 2025-12-24 S Sale
3.9
Bulis Veronica Sanchez

VP, Corporate Controller

Officer
1,136 -12.3%
38.67
US$43,929 		1,136 -12.3% 38.67 US$43,929
2025-11-12 2025-11-10 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
95 -0.6%
16.12
US$1,531 		95 -0.6% 16.12 US$1,531
2025-11-12 2025-11-10 S Sale
3.9
Bulis Veronica Sanchez

VP, Corporate Controller

Officer
239 -2.5%
16.10
US$3,848 		239 -2.5% 16.10 US$3,848
2025-11-12 2025-11-10 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
412 -0.6%
16.11
US$6,637 		412 -0.6% 16.11 US$6,637
2025-11-12 2025-11-10 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
138 -0.9%
16.16
US$2,230 		138 -0.9% 16.16 US$2,230
2025-08-22 2025-08-21 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
7,257 -9.7%
10.54
US$76,518 		7,257 -9.7% 10.54 US$76,518
2025-08-22 2025-08-21 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
1,453 -8.6%
10.54
US$15,320 		1,453 -8.6% 10.54 US$15,320
2025-08-22 2025-08-21 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
1,004 -6.0%
10.54
US$10,586 		1,004 -6.0% 10.54 US$10,586
2025-08-22 2025-08-21 S Sale
1.5
Newton Charles W.

Chief Financial Officer

Officer
1,453 -8.7%
10.54
US$15,320 		1,453 -8.7% 10.54 US$15,320
2025-08-13 2025-08-12 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
406 -1.2%
10.34
US$4,197 		406 -1.2% 10.34 US$4,197
2025-08-13 2025-08-12 S Sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
94 -1.1%
10.34
US$972 		94 -1.1% 10.34 US$972
2025-08-13 2025-08-12 S Sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
136 -1.5%
10.34
US$1,406 		136 -1.5% 10.34 US$1,406
2025-08-13 2025-08-12 S Sale
1.5
Newton Charles W.

Chief Financial Officer

Officer
136 -1.5%
10.34
US$1,406 		136 -1.5% 10.34 US$1,406
2025-08-13 2025-08-11 S Sale
2.3
Seely Lynn

President and CEO

Executive Director
391 -1.1%
10.53
US$4,116 		391 -1.1% 10.53 US$4,116
2025-08-13 2025-08-11 PlS Planned sale
2.5
Hill Stephen J.

Chief Operating Officer

Officer
91 -1.0%
10.53
US$958 		91 -1.0% 10.53 US$958
2025-08-13 2025-08-11 PlS Planned sale
2.5
Lee Gary K.

Chief Scientific Officer

Officer
131 -1.4%
10.53
US$1,379 		131 -1.4% 10.53 US$1,379
2025-08-13 2025-08-11 PlS Planned sale
1.5
Newton Charles W.

Chief Financial Officer

Officer
131 -1.5%
10.53
US$1,379 		131 -1.5% 10.53 US$1,379
2025-04-02 2025-03-31 B Purchase
1.4
BRAWLEY OTIS W
Non-Executive Director
35,640 +inf%
0.56
US$19,958 		35,640 +inf% 0.56 US$19,958
2025-03-25 2025-03-21 B Purchase
0.6
Ramachandra Sumant
Non-Executive Director
200,000 +inf%
0.58
US$115,220 		200,000 +inf% 0.58 US$115,220
2025-03-18 2025-03-17 B Purchase
1.5
Newton Charles W.

Chief Financial Officer

Officer
200,000 +inf%
0.56
US$111,620 		200,000 +inf% 0.56 US$111,620
2025-03-18 2025-03-14 B Purchase
3.2
Klausner Richard
Non-Executive Director
158,000 +23.1%
0.60
US$94,942 		158,000 +23.1% 0.60 US$94,942
2025-03-18 2025-03-14 B Purchase
2.3
Seely Lynn

President and CEO

Executive Director
175,000 +32.6%
0.61
US$106,190 		175,000 +32.6% 0.61 US$106,190
2023-08-17 2023-08-15 S Sale
3.2
Klausner Richard
Non-Executive Director
58,020 -5.9%
2.28
US$132,286 		58,020 -5.9% 2.28 US$132,286
2023-08-15 2023-08-15 PrS Proposed sale
3.2
Klausner Richard

Director

Non-Executive Director
4,485
2.29
US$10,271 		4,485 2.29 US$10,271
2023-08-15 2023-08-15 PrS Proposed sale
3.2
Klausner Richard

Director

Non-Executive Director
4,485
2.29
US$10,271 		4,485 2.29 US$10,271
2023-08-15 2023-08-15 PrS Proposed sale
3.2
Klausner Richard

Director

Non-Executive Director
44,565
2.29
US$102,054 		44,565 2.29 US$102,054
2023-08-15 2023-08-15 PrS Proposed sale
3.2
Klausner Richard

Director

Non-Executive Director
4,485
2.29
US$10,271 		4,485 2.29 US$10,271
2023-07-17 2023-07-13 PrS Proposed sale
3.2
Klausner Richard

Officer; Director

Executive Director
14,500
2.90
US$42,050 		14,500 2.90 US$42,050
2023-07-17 2023-07-13 PrS Proposed sale
3.2
Klausner Richard

Officer; Director

Executive Director
3,300
2.90
US$9,570 		3,300 2.90 US$9,570
2023-07-17 2023-07-13 PrS Proposed sale
3.2
Klausner Richard

Officer; Director

Executive Director
3,300
2.90
US$9,570 		3,300 2.90 US$9,570
2023-07-17 2023-07-13 PrS Proposed sale
3.2
Klausner Richard

Officer; Director

Executive Director
3,300
2.90
US$9,570 		3,300 2.90 US$9,570
2022-09-27 2022-09-23 S Sale
3.2
Klausner Richard
Non-Executive Director
11,100 -1.1%
6.40
US$71,041 		11,100 -1.1% 6.40 US$71,041
2021-06-23 2021-06-21 B Purchase
0.6
FRIEDMAN CATHY
Non-Executive Director
17,648 +inf%
17.00
US$300,016 		17,648 +inf% 17.00 US$300,016
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