Company · Ownership research

ASSEMBLY BIOSCIENCES, INC. ASMB

CIK 0001426800 · CUSIP 045396207

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 045396207 (ASMB), not CUSIP 045396108 (ASMB), and does not merge CUSIPs.

This page lists the top 20 of 75 rows by value; the complete set is available through the API.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	GILEAD SCIENCES, INC. CIK 882095 · View history	$125.02M 4,505,391 shares	5.90%	0(0.00%)Unchanged	SEC filing ↗ May 8, 2026	▾
02	FARALLON CAPITAL MANAGEMENT LLC CIK 909661 · Amended · View history	$34.07M 1,227,590 shares	0.20%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
03	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$28.32M 1,020,410 shares	0.30%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
04	COMMODORE CAPITAL LP CIK 1831942 · View history	$27.75M 1,000,000 shares	1.61%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
05	JANUS HENDERSON GROUP PLC CIK 1274173 · Amended · View history	$23.48M 849,309 shares	0.01%	+11.38K(+1.40%)Added	SEC filing ↗ May 18, 2026	▾
06	Paradigm Biocapital Advisors LP CIK 1855655 · View history	$18.46M 665,251 shares	0.38%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
07	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$13.61M 490,447 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
08	Parkman Healthcare Partners LLC CIK 1777015 · View history	$11.41M 411,227 shares	1.18%	+161.87K(+64.90%)Added	SEC filing ↗ May 15, 2026	▾
09	Point72 Asset Management, L.P. CIK 1603466 · View history	$9.55M 344,105 shares	0.02%	-256.50K(-42.70%)Reduced	SEC filing ↗ May 15, 2026	▾
10	Blackstone Inc. CIK 1393818 · Amended · View history	$8.24M 296,855 shares	0.03%	-21.90K(-6.90%)Reduced	SEC filing ↗ May 15, 2026	▾
11	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$6.48M 233,650 shares	0.00%	+135.43K(+137.90%)Added	SEC filing ↗ May 15, 2026	▾
12	BlackRock, Inc. CIK 2012383 · View history	$5.63M 202,743 shares	0.00%	+10.45K(+5.40%)Added	SEC filing ↗ May 13, 2026	▾
13	STEMPOINT CAPITAL LP CIK 1952142 · Amended · View history	$5.15M 185,435 shares	0.99%	+28.71K(+18.30%)Added	SEC filing ↗ May 18, 2026	▾
14	B Group, Inc. CIK 2043476 · View history	$4.88M 175,706 shares	3.61%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
15	MARSHALL WACE, LLP CIK 1318757 · View history	$4.53M 163,400 shares	0.00%	+34.33K(+26.60%)Added	SEC filing ↗ May 15, 2026	▾
16	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$4.47M 161,000 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ May 15, 2026	▾
17	Patient Square Capital LP CIK 1819257 · View history	$3.78M 136,315 shares	0.67%	+9.31K(+7.30%)Added	SEC filing ↗ May 15, 2026	▾
18	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$3.69M 132,971 shares	0.00%	+1.66K(+1.30%)Added	SEC filing ↗ May 15, 2026	▾
19	Schonfeld Strategic Advisors LLC CIK 1665241 · View history	$3.34M 120,500 shares	0.03%	+66.27K(+122.20%)Added	SEC filing ↗ May 15, 2026	▾
20	Caption Management, LLC CIK 1706766 · View history	$2.27M 81,841 shares	0.11%	-24.75K(-23.20%)Reduced	SEC filing ↗ May 15, 2026	▾

Showing 20 / 75 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

13,568,619

Not deduplicated across managers

Disclosed value

$376.38M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

ASSEMBLY BIOSCIENCES, INC. · Q1 2026

Explore all 75 reporting institutions.

This page includes 20 of 75 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

Download CSV
Earlier quarters
Advanced screening & filtering
API & AI access

Already have an account?

＋ New accounts get free API credits to explore data beyond ownership filings.

For AI agents & developers

The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 75 reporting institutions; totals use the complete disclosed data.

Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.

MCP  https://api.akkrudata.ai/mcp

akkru_institutional_holdings
{"action":"holders","cusip":"045396207","quarter":"2026Q1","type":"positions","page_size":100}

Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.

MCP endpoint: https://api.akkrudata.ai/mcp
API / MCP / CLI documentation: /documents
llms.txt: /llms.txt

Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.