ASMB

Assembly Biosciences, INC.

Insider trading activity for Assembly Biosciences, INC., straight from SEC Form 4 filings. Net figures below count open-market buys and sales only — grants, option exercises and tax withholding are excluded because they are compensation, not decisions to trade.

Past 3 months

-$237.6K

net selling

Bought(0 · 0 insiders): $0
Sold(8 · 4 insiders): $237.6K

Past 6 months

-$238.3K

net selling

Bought(0 · 0 insiders): $0
Sold(9 · 4 insiders): $238.3K

Past 12 months

-$252.3K

net selling

Bought(0 · 0 insiders): $0
Sold(13 · 4 insiders): $252.3K

Transaction history

The 48 most recent Form 4 transactions.

Open in screener →

Insider transactions, newest first: date, security, transaction type, size and a link to the filing each row came from.
Date	Insider	Role	Type	Shares	Price	Value	Δ Own	Filing
Nov 2	Bjorkquist Jeanette M	PFO and PAO	SSELL	9	$20.35	$183	<0.1%	Open the original filing on SEC.gov
Nov 2	Bjorkquist Jeanette M	PFO and PAO	SSELL	718	$19.61	$14.1K	-3.9%	Open the original filing on SEC.gov
Nov 2	White Nicole S	Chief Manufacturing…	SSELL	29	$20.35	$590	<0.1%	Open the original filing on SEC.gov
Nov 2	White Nicole S	Chief Manufacturing…	SSELL	2,564	$19.61	$50.3K	-4.2%	Open the original filing on SEC.gov
Nov 2	Gaggar Anuj	Chief Medical Officer	SSELL	29	$20.35	$590	<0.1%	Open the original filing on SEC.gov
Nov 2	Gaggar Anuj	Chief Medical Officer	SSELL	2,564	$19.61	$50.3K	-4.5%	Open the original filing on SEC.gov
Nov 2	Okazaki Jason A	CEO and President	SSELL	69	$20.35	$1.4K	<0.1%	Open the original filing on SEC.gov
Nov 2	Okazaki Jason A	CEO and President	SSELL	6,133	$19.61	$120.3K	-3.0%	Open the original filing on SEC.gov
Oct 30	Bjorkquist Jeanette M	PFO and PAO	AGRANT	3,840	—	—	+26.4%	Open the original filing on SEC.gov
Oct 30	White Nicole S	Chief Manufacturing…	AGRANT	13,705	—	—	+28.5%	Open the original filing on SEC.gov
Oct 30	Delaney William E IV	Chief Scientific Officer	AGRANT	13,705	—	—	+22.7%	Open the original filing on SEC.gov
Oct 30	Gaggar Anuj	Chief Medical Officer	AGRANT	13,705	—	—	+32.1%	Open the original filing on SEC.gov
Oct 30	Okazaki Jason A	CEO and President	AGRANT	38,380	—	—	+23.5%	Open the original filing on SEC.gov
Jun 17	Bjorkquist Jeanette M	PFO and PAO	SSELL	29	$23.25	$674	-0.2%	Open the original filing on SEC.gov
Jun 4	McHutchison John G	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Jun 4	Mahony Susan	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Jun 4	Johnson-Pratt Lisa	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Jun 4	Houghton Michael	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Jun 4	Consylman Gina	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
Jun 4	Altig Anthony E	Director	AGRANT◆	8,000	—	—	—	Open the original filing on SEC.gov
May 26	Gilead Sciences, Inc.	10% Owner	AGRANT	471,698	$26.50	$12.5M	+10.5%	Open the original filing on SEC.gov
Mar 30	Bjorkquist Jeanette M	PFO and PAO	SSELL	16	$27.49	$440	-0.1%	Open the original filing on SEC.gov
Mar 30	Bjorkquist Jeanette M	PFO and PAO	SSELL	312	$26.65	$8.3K	-2.7%	Open the original filing on SEC.gov
Mar 30	White Nicole S	Chief Manufacturing…	SSELL	9	$27.49	$247	<0.1%	Open the original filing on SEC.gov
Mar 30	White Nicole S	Chief Manufacturing…	SSELL	188	$26.65	$5K	-0.5%	Open the original filing on SEC.gov
Mar 29	Bjorkquist Jeanette M	PFO and PAO	AGRANT	6,500	—	—	+132.2%	Open the original filing on SEC.gov
Mar 29	White Nicole S	Chief Manufacturing…	AGRANT	26,000	—	—	+222.7%	Open the original filing on SEC.gov
Mar 29	Gaggar Anuj	Chief Medical Officer	AGRANT	26,000	—	—	+1,300%	Open the original filing on SEC.gov
Mar 29	Delaney William E IV	Chief Scientific Officer	AGRANT	26,000	—	—	+132.4%	Open the original filing on SEC.gov
Mar 29	Okazaki Jason A	CEO and President	AGRANT	94,250	—	—	+533.5%	Open the original filing on SEC.gov
Mar 29	Gaggar Anuj	Chief Medical Officer	AGRANT	14,000	—	—	+48.8%	Open the original filing on SEC.gov
Mar 29	White Nicole S	Chief Manufacturing…	AGRANT	14,000	—	—	+41.0%	Open the original filing on SEC.gov
Mar 29	Bjorkquist Jeanette M	PFO and PAO	AGRANT	3,500	—	—	+31.6%	Open the original filing on SEC.gov
Mar 29	Delaney William E IV	Chief Scientific Officer	AGRANT	14,000	—	—	+30.2%	Open the original filing on SEC.gov
Mar 29	Okazaki Jason A	CEO and President	AGRANT	50,750	—	—	+45.1%	Open the original filing on SEC.gov
Aug 8, 2025	Gilead Sciences, Inc.	10% Owner	PDBUY◆	1.1M	—	—	—	Open the original filing on SEC.gov
Aug 8, 2025	Gilead Sciences, Inc.	10% Owner	PDBUY◆	1.1M	—	—	—	Open the original filing on SEC.gov
Aug 8, 2025	Gilead Sciences, Inc.	10% Owner	PBUY	2.3M	—	—	+103.9%	Open the original filing on SEC.gov
Jun 16, 2025	Bjorkquist Jeanette M	PFO and PAO	AGRANT◆	600	—	—	—	Open the original filing on SEC.gov
Jun 16, 2025	Bjorkquist Jeanette M	PFO and PAO	AGRANT	300	—	—	+6.3%	Open the original filing on SEC.gov
Jun 5, 2025	Houghton Michael	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Jun 5, 2025	Mahony Susan	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Jun 5, 2025	McHutchison John G	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Jun 5, 2025	Johnson-Pratt Lisa	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Jun 5, 2025	Ringo William R	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Jun 5, 2025	Consylman Gina	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Jun 5, 2025	Altig Anthony E	Director	AGRANT◆	3,500	—	—	—	Open the original filing on SEC.gov
Mar 31, 2025	McHutchison John G	Director	SSELL	757	$9.85	$7.5K	-4.0%	Open the original filing on SEC.gov

SSELL$183

Bjorkquist Jeanette M · PFO and PAONov 2

9 sh @ $20.35 · <0.1% own

SSELL$14.1K

Bjorkquist Jeanette M · PFO and PAONov 2

718 sh @ $19.61 · -3.9% own

SSELL$590

White Nicole S · Chief Manufacturin…Nov 2

29 sh @ $20.35 · <0.1% own

SSELL$50.3K

White Nicole S · Chief Manufacturin…Nov 2

2,564 sh @ $19.61 · -4.2% own

SSELL$590

Gaggar Anuj · Chief Medical…Nov 2

29 sh @ $20.35 · <0.1% own

SSELL$50.3K

Gaggar Anuj · Chief Medical…Nov 2

2,564 sh @ $19.61 · -4.5% own

SSELL$1.4K

Okazaki Jason A · CEO and PresidentNov 2

69 sh @ $20.35 · <0.1% own

SSELL$120.3K

Okazaki Jason A · CEO and PresidentNov 2

6,133 sh @ $19.61 · -3.0% own

AGRANT—

Bjorkquist Jeanette M · PFO and PAOOct 30

3,840 sh · +26.4% own

AGRANT—

White Nicole S · Chief Manufacturin…Oct 30

13,705 sh · +28.5% own

AGRANT—

Delaney William E IV · Chief Scientific…Oct 30

13,705 sh · +22.7% own

AGRANT—

Gaggar Anuj · Chief Medical…Oct 30

13,705 sh · +32.1% own

AGRANT—

Okazaki Jason A · CEO and PresidentOct 30

38,380 sh · +23.5% own

SSELL$674

Bjorkquist Jeanette M · PFO and PAOJun 17

29 sh @ $23.25 · -0.2% own

AGRANT◆—

McHutchison John G · DirectorJun 4

8,000 sh

AGRANT◆—

Mahony Susan · DirectorJun 4

8,000 sh

AGRANT◆—

Johnson-Pratt Lisa · DirectorJun 4

8,000 sh

AGRANT◆—

Houghton Michael · DirectorJun 4

8,000 sh

AGRANT◆—

Consylman Gina · DirectorJun 4

8,000 sh

AGRANT◆—

Altig Anthony E · DirectorJun 4

8,000 sh

AGRANT$12.5M

Gilead Sciences, Inc. · 10% OwnerMay 26

471,698 sh @ $26.50 · +10.5% own

SSELL$440

Bjorkquist Jeanette M · PFO and PAOMar 30

16 sh @ $27.49 · -0.1% own

SSELL$8.3K

Bjorkquist Jeanette M · PFO and PAOMar 30

312 sh @ $26.65 · -2.7% own

SSELL$247

White Nicole S · Chief Manufacturin…Mar 30

9 sh @ $27.49 · <0.1% own

SSELL$5K

White Nicole S · Chief Manufacturin…Mar 30

188 sh @ $26.65 · -0.5% own

AGRANT—

Bjorkquist Jeanette M · PFO and PAOMar 29

6,500 sh · +132.2% own

AGRANT—

White Nicole S · Chief Manufacturin…Mar 29

26,000 sh · +222.7% own

AGRANT—

Gaggar Anuj · Chief Medical…Mar 29

26,000 sh · +1,300% own

AGRANT—

Delaney William E IV · Chief Scientific…Mar 29

26,000 sh · +132.4% own

AGRANT—

Okazaki Jason A · CEO and PresidentMar 29

94,250 sh · +533.5% own

AGRANT—

Gaggar Anuj · Chief Medical…Mar 29

14,000 sh · +48.8% own

AGRANT—

White Nicole S · Chief Manufacturin…Mar 29

14,000 sh · +41.0% own

AGRANT—

Bjorkquist Jeanette M · PFO and PAOMar 29

3,500 sh · +31.6% own

AGRANT—

Delaney William E IV · Chief Scientific…Mar 29

14,000 sh · +30.2% own

AGRANT—

Okazaki Jason A · CEO and PresidentMar 29

50,750 sh · +45.1% own

PDBUY◆—

Gilead Sciences, Inc. · 10% OwnerAug 8, 2025

1.1M sh

PDBUY◆—

Gilead Sciences, Inc. · 10% OwnerAug 8, 2025

1.1M sh

PBUY—

Gilead Sciences, Inc. · 10% OwnerAug 8, 2025

2.3M sh · +103.9% own

AGRANT◆—

Bjorkquist Jeanette M · PFO and PAOJun 16, 2025

600 sh

AGRANT—

Bjorkquist Jeanette M · PFO and PAOJun 16, 2025

300 sh · +6.3% own

AGRANT◆—

Houghton Michael · DirectorJun 5, 2025

3,500 sh

AGRANT◆—

Mahony Susan · DirectorJun 5, 2025

3,500 sh

AGRANT◆—

McHutchison John G · DirectorJun 5, 2025

3,500 sh

AGRANT◆—

Johnson-Pratt Lisa · DirectorJun 5, 2025

3,500 sh

AGRANT◆—

Ringo William R · DirectorJun 5, 2025

3,500 sh

AGRANT◆—

Consylman Gina · DirectorJun 5, 2025

3,500 sh

AGRANT◆—

Altig Anthony E · DirectorJun 5, 2025

3,500 sh

SSELL$7.5K

McHutchison John G · DirectorMar 31, 2025

757 sh @ $9.85 · -4.0% own

Filing record

How quickly insiders here report their trades. Section 16 allows two business days from the transaction.

7 of 33 filings we hold were filed after the two-business-day deadline. The furthest past the deadline was 46 business days late.

Form 4 filings made after the two-business-day deadline, with the transaction date, the filing date and the number of business days between them.
Traded	Filed	Insider	Past deadline	Largest line	Source
Mar 29	Jun 4	Bjorkquist Jeanette MPFO and PAO	46days · about 2 months	—	Filing ↗
Mar 29	Jun 4	Okazaki Jason ACEO and President	46days · about 2 months	—	Filing ↗
Mar 29	Jun 4	Delaney William E IVChief Scientific Officer	46days · about 2 months	—	Filing ↗
Mar 29	Jun 4	White Nicole SChief Manufacturing Officer	46days · about 2 months	—	Filing ↗
Mar 29	Jun 4	Gaggar AnujChief Medical Officer	46days · about 2 months	—	Filing ↗

Bjorkquist Jeanette MPFO and PAO

46days · about 2 months