Assembly Biosciences, Inc.
Assembly Biosciences, Inc. (ASMB) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · ASMB · as of Jun 8, 2026
Activity summary
Buy transactions
3
P-Purchase only
Sell transactions
4
12 Months
Buy/Sell ratio
0.75
Buy/Sell (by trades)
Overall sentiment
Assembly Biosciences, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
ASMB insider buying and selling by quarter
ASMB insider selling · ASMB insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · ASMB ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
ASMB executive sell shares · ASMB board member insider trading · ASMB insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Mar 29, 2026 | Gaggar Anuj Chief Medical Officer | Award | 14,000 | — | Form 4 |
| Mar 29, 2026 | White Nicole S Chief Manufacturing Officer | Award | 14,000 | — | Form 4 |
| Mar 29, 2026 | Bjorkquist Jeanette M PFO and PAO | Award | 3,500 | — | Form 4 |
| Mar 29, 2026 | Delaney William E IV Chief Scientific Officer | Award | 14,000 | — | Form 4 |
| Mar 29, 2026 | Okazaki Jason A CEO and President · Director | Award | 50,750 | — | Form 4 |
| May 26, 2026 | GILEAD SCIENCES, INC. 10 percent owner | Award | 471,698 | $12.50M⚡ | Form 4 |
| Mar 29, 2026 | Bjorkquist Jeanette M PFO and PAO | Award | 6,500 | — | Form 4 |
| Mar 30, 2026 | Bjorkquist Jeanette M PFO and PAO | Sale | 312 | $8K | Form 4 |
| Mar 30, 2026 | Bjorkquist Jeanette M PFO and PAO | Sale | 16 | $440 | Form 4 |
| Mar 29, 2026 | White Nicole S Chief Manufacturing Officer | Award | 26,000 | — | Form 4 |
| Mar 30, 2026 | White Nicole S Chief Manufacturing Officer | Sale | 188 | $5K | Form 4 |
| Mar 30, 2026 | White Nicole S Chief Manufacturing Officer | Sale | 9 | $247 | Form 4 |
| Mar 29, 2026 | Gaggar Anuj Chief Medical Officer | Award | 26,000 | — | Form 4 |
| Mar 29, 2026 | Delaney William E IV Chief Scientific Officer | Award | 26,000 | — | Form 4 |
| Mar 29, 2026 | Okazaki Jason A CEO and President · Director | Award | 94,250 | — | Form 4 |
| Aug 8, 2025 | GILEAD SCIENCES, INC. 10 percent owner | Purchase | 2,295,920 | $2K | Form 4 |
| Jun 16, 2025 | Bjorkquist Jeanette M PFO and PAO | Award | 300 | — | Form 4 |
| Mar 31, 2025 | McHutchison John G Director | Sale | 757 | $7K | Form 4 |
| Mar 29, 2025 | Bjorkquist Jeanette M PAO | Award | 1,655 | — | Form 4 |
| Mar 31, 2025 | Bjorkquist Jeanette M PAO | Sale | 180 | $2K | Form 4 |
| Mar 31, 2025 | Okazaki Jason A CEO and President · Director | Sale | 355 | $3K | Form 4 |
| Mar 31, 2025 | White Nicole S Chief Manufacturing Officer | Sale | 197 | $2K | Form 4 |
| Dec 30, 2024 | Houghton Michael Director | Purchase | 3,202 | $50K | Form 4 |
| Dec 19, 2024 | GILEAD SCIENCES, INC. 10 percent owner | Purchase | 940,499 | $20.10M⚡ | Form 4 |
| Nov 25, 2024 | Schornstein Alexander 10 percent owner | Purchase | 5,000 | $74K | Form 4 |
White Nicole S
Chief Manufacturing Officer
Date
Mar 29
Shares
14,000
Price
—
Value
—
Delaney William E IV
Chief Scientific Officer
Date
Mar 29
Shares
14,000
Price
—
Value
—
Okazaki Jason A
CEO and President · Director
Date
Mar 29
Shares
50,750
Price
—
Value
—
GILEAD SCIENCES, INC.
10 percent owner
Date
May 26
Shares
471,698
Price
$26.50
Value
$12.50M ⚡
White Nicole S
Chief Manufacturing Officer
Date
Mar 29
Shares
26,000
Price
—
Value
—
White Nicole S
Chief Manufacturing Officer
Date
Mar 30
Shares
188
Price
$26.65
Value
$5K
White Nicole S
Chief Manufacturing Officer
Date
Mar 30
Shares
9
Price
$27.49
Value
$247
Delaney William E IV
Chief Scientific Officer
Date
Mar 29
Shares
26,000
Price
—
Value
—
Okazaki Jason A
CEO and President · Director
Date
Mar 29
Shares
94,250
Price
—
Value
—
GILEAD SCIENCES, INC.
10 percent owner
Date
Aug 8
Shares
2,295,920
Price
$0.00
Value
$2K
Okazaki Jason A
CEO and President · Director
Date
Mar 31
Shares
355
Price
$9.85
Value
$3K
White Nicole S
Chief Manufacturing Officer
Date
Mar 31
Shares
197
Price
$9.85
Value
$2K
GILEAD SCIENCES, INC.
10 percent owner
Date
Dec 19
Shares
940,499
Price
$21.37
Value
$20.10M ⚡
Schornstein Alexander
10 percent owner
Date
Nov 25
Shares
5,000
Price
$14.85
Value
$74K
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About ASMB insider trading
ASMB insider trades
Assembly Biosciences, Inc. (ASMB) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Bjorkquist Jeanette M (PFO and PAO), White Nicole S (Chief Manufacturing Officer), Gaggar Anuj (Chief Medical Officer). Over the past 12 months, 5 insiders have filed transactions with the SEC. ASMB insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Assembly Biosciences, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
ASMB insider trading · 5 questionsThe insiders of Assembly Biosciences, Inc. (ASMB) include executives and directors such as Bjorkquist Jeanette M (PFO and PAO), White Nicole S (Chief Manufacturing Officer), Gaggar Anuj (Chief Medical Officer), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026