Assembly Biosciences Inc. Insider Trading

ASMB

Last 12 months

Insiders sold 252K and bought nothing on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. The last open-market buy by an executive or director was in Dec 2024.

Net open-market

−252K

0 buys · 7 sales

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

0 / 4

executives and directors

Last open-market buy

Dec 2024

Dec 30, 2024

Get an email when ASMB's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Nov 2	Jeanette M Bjorkquist PFO and PAO	SoldNo plan 2 parts	727	$19.62 average	14K	4.0%	Form 4
Nov 2	Nicole S White Chief Manufacturing Officer	SoldNo plan 2 parts	2,593	$19.62 average	51K	4.2%	Form 4
Nov 2	Anuj Gaggar Chief Medical Officer	SoldNo plan 2 parts	2,593	$19.62 average	51K	4.6%	Form 4
Nov 2	Jason A Okazaki CEO and President	SoldNo plan 2 parts	6,202	$19.62 average	122K	3.1%	Form 4
Jun 17	Jeanette M Bjorkquist PFO and PAO	SoldNo plan	29	$23.25	$674	0.2%	Form 4
Mar 30	Jeanette M Bjorkquist PFO and PAO	SoldNo plan 2 parts	328	$26.69 average	9K	2.9%	Form 4
Mar 30	Nicole S White Chief Manufacturing Officer	SoldNo plan 2 parts	197	$26.69 average	5K	0.5%	Form 4
Aug 8, 2025	Gilead Sciences, Inc. Large holder	Bought	2,295,920	—	—	104%	Form 4
Mar 31, 2025	John G McHutchison Director	SoldNo plan	757	$9.85	7K	4.0%	Form 4
Mar 31, 2025	Jeanette M Bjorkquist Principal Accounting Officer	SoldNo plan	180	$9.85	2K	3.8%	Form 4
Mar 31, 2025	Jason A Okazaki CEO and President	SoldNo plan	355	$9.85	3K	2.3%	Form 4
Mar 31, 2025	Nicole S White Chief Manufacturing Officer	SoldNo plan	197	$9.85	2K	1.7%	Form 4
Dec 30, 2024	Michael Houghton Director	Bought	3,202	$15.61	50K	New	Form 4
Dec 19, 2024	Gilead Sciences, Inc. Large holder	Bought	940,499	$21.37	$20.1M	74%	Form 4
Nov 22, 2024 – Nov 25, 2024	Alexander Schornstein Large holder	Bought 3 parts	25,000	$14.88 average	372K	3.6%	Form 4
Nov 18, 2024	Nicole S White Chief Manufacturing Officer	SoldNo plan	40	$16.29	$652	0.3%	Form 4

Nov 2No plan
Jeanette M Bjorkquist
PFO and PAO · sold 727 at avg $19.62
14K
4.0% of stake
Nov 2No plan
Nicole S White
Chief Manufacturing Officer · sold 2,593 at avg $19.62
51K
4.2% of stake
Nov 2No plan
Anuj Gaggar
Chief Medical Officer · sold 2,593 at avg $19.62
51K
4.6% of stake
Nov 2No plan
Jason A Okazaki
CEO and President · sold 6,202 at avg $19.62
122K
3.1% of stake
Jun 17No plan
Jeanette M Bjorkquist
PFO and PAO · sold 29 at $23.25
$674
0.2% of stake
Mar 30No plan
Jeanette M Bjorkquist
PFO and PAO · sold 328 at avg $26.69
9K
2.9% of stake
Mar 30No plan
Nicole S White
Chief Manufacturing Officer · sold 197 at avg $26.69
5K
0.5% of stake
Aug 8, 2025
Gilead Sciences, Inc.
Large holder · bought 2,295,920
—
104% of stake
Mar 31, 2025No plan
John G McHutchison
Director · sold 757 at $9.85
7K
4.0% of stake
Mar 31, 2025No plan
Jeanette M Bjorkquist
Principal Accounting Officer · sold 180 at $9.85
2K
3.8% of stake
Mar 31, 2025No plan
Jason A Okazaki
CEO and President · sold 355 at $9.85
3K
2.3% of stake
Mar 31, 2025No plan
Nicole S White
Chief Manufacturing Officer · sold 197 at $9.85
2K
1.7% of stake
Dec 30, 2024
Michael Houghton
Director · bought 3,202 at $15.61
50K
New position
Dec 19, 2024
Gilead Sciences, Inc.
Large holder · bought 940,499 at $21.37
$20.1M
74% of stake
Nov 22, 2024 – Nov 25, 2024
Alexander Schornstein
Large holder · bought 25,000 at avg $14.88
372K
3.6% of stake
Nov 18, 2024No plan
Nicole S White
Chief Manufacturing Officer · sold 40 at $16.29
$652
0.3% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch ASMB, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

ASMB is in 6 US ETFs. The largest of them, with ASMB's weight in each:

Spot a number that looks wrong? Check it in ASMB's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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