Company · Ownership research

Aclaris Therapeutics, Inc. ACRS

CIK 0001557746 · CUSIP 00461U105

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 00461U105 (ACRS), not CUSIP 00461U905 (ACRS), CUSIP 00461U955 (ACRS), and does not merge CUSIPs.

This page lists the top 20 of 136 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

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	BML Capital Management, LLC CIK 1616824 · View history	$53.44M 14,250,000 shares	34.38%	0(0.00%)Unchanged	SEC filing ↗ May 6, 2026	▾
02	Deep Track Capital, LP CIK 1856083 · View history	$35.04M 9,345,000 shares	0.72%	+9.35MNew	SEC filing ↗ May 15, 2026	▾
03	BlackRock, Inc. CIK 2012383 · View history	$27.78M 7,407,065 shares	0.00%	+602.22K(+8.80%)Added	SEC filing ↗ May 13, 2026	▾
04	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$25.52M 6,804,072 shares	0.27%	+6.80MNew	SEC filing ↗ May 15, 2026	▾
05	Vivo Capital, LLC CIK 1674712 · Amended · View history	$25.00M 6,666,666 shares	2.08%	-2.22M(-25.00%)Reduced	SEC filing ↗ May 20, 2026	▾
06	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$19.38M 5,167,469 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
07	Frazier Life Sciences Management, L.P. CIK 1892134 · View history	$18.47M 4,925,374 shares	0.48%	+4.93MNew	SEC filing ↗ May 15, 2026	▾
08	Rock Springs Capital Management LP CIK 1595725 · View history	$16.77M 4,472,650 shares	0.99%	+18.91K(+0.40%)Added	SEC filing ↗ May 15, 2026	▾
09	Decheng Capital LLC CIK 2010850 · View history	$15.16M 4,041,736 shares	2.29%	0(0.00%)Unchanged	SEC filing ↗ May 13, 2026	▾
10	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$14.52M 3,871,000 shares	0.02%	+500.00K(+14.80%)Added	SEC filing ↗ May 15, 2026	▾
11	Balyasny Asset Management L.P. CIK 1218710 · View history	$12.60M 3,361,328 shares	0.02%	+3.36MNew	SEC filing ↗ May 15, 2026	▾
12	MORGAN STANLEY CIK 895421 · View history	$10.30M 2,746,302 shares	0.00%	-669.09K(-19.60%)Reduced	SEC filing ↗ May 15, 2026	▾
13	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$9.09M 2,423,691 shares	0.00%	+30.92K(+1.30%)Added	SEC filing ↗ May 15, 2026	▾
14	CITADEL ADVISORS LLC CIK 1423053 · View history	$8.43M 2,249,319 shares	0.01%	+1.04M(+86.60%)Added	SEC filing ↗ May 15, 2026	▾
15	STATE STREET CORP CIK 93751 · View history	$7.53M 2,008,746 shares	0.00%	+502.34K(+33.30%)Added	SEC filing ↗ May 15, 2026	▾
16	Kalehua Capital Management LLC CIK 2106181 · Amended · View history	$6.87M 1,832,365 shares	4.86%	+1.83MNew	SEC filing ↗ May 15, 2026	▾
17	BRAIDWELL LP CIK 1920938 · View history	$6.37M 1,699,116 shares	0.21%	+1.70MNew	SEC filing ↗ May 15, 2026	▾
18	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$6.21M 1,656,066 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
19	Palo Alto Investors LP CIK 1306923 · View history	$6.05M 1,613,430 shares	0.93%	+46.59K(+3.00%)Added	SEC filing ↗ May 15, 2026	▾
20	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$5.77M 1,539,791 shares	0.01%	-582.61K(-27.50%)Reduced	SEC filing ↗ May 13, 2026	▾

Showing 20 / 136 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

136

Cancelled or null records excluded

Disclosed shares

109,211,660

Not deduplicated across managers

Disclosed value

$409.40M

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.

Aclaris Therapeutics, Inc. · Q1 2026

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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.