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 148 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	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$67.30M 12,723,026 shares	0.58%	+5.92M(+87.00%)Added	SEC filing ↗ Aug 14, 2026	▾
02	BML Capital Management, LLC CIK 1616824 · View history	$63.35M 11,975,000 shares	36.18%	-2.27M(-16.00%)Reduced	SEC filing ↗ Aug 7, 2026	▾
03	BlackRock, Inc. CIK 2012383 · View history	$53.10M 10,037,008 shares	0.00%	+2.63M(+35.50%)Added	SEC filing ↗ Aug 7, 2026	▾
04	Deep Track Capital, LP CIK 1856083 · View history	$49.44M 9,345,000 shares	0.73%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
05	Vivo Capital, LLC CIK 1674712 · View history	$35.41M 6,694,637 shares	3.23%	+27.97K(+0.40%)Added	SEC filing ↗ Aug 14, 2026	▾
06	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history	$30.78M 5,817,866 shares	0.00%	+650.40K(+12.60%)Added	SEC filing ↗ Aug 13, 2026	▾
07	Frazier Life Sciences Management, L.P. CIK 1892134 · View history	$26.06M 4,925,374 shares	0.57%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
08	Rock Springs Capital Management LP CIK 1595725 · View history	$22.91M 4,330,532 shares	1.12%	-142.12K(-3.20%)Reduced	SEC filing ↗ Aug 14, 2026	▾
09	ADAGE CAPITAL PARTNERS GP, L.L.C. CIK 1165408 · View history	$21.54M 4,071,000 shares	0.03%	+200.00K(+5.20%)Added	SEC filing ↗ Aug 14, 2026	▾
10	Decheng Capital LLC CIK 2010850 · View history	$21.38M 4,041,736 shares	2.92%	0(0.00%)Unchanged	SEC filing ↗ Aug 14, 2026	▾
11	STATE STREET CORP CIK 93751 · View history	$17.22M 3,255,340 shares	0.00%	+1.25M(+62.10%)Added	SEC filing ↗ Aug 7, 2026	▾
12	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$16.88M 3,190,058 shares	0.00%	+766.37K(+31.60%)Added	SEC filing ↗ Aug 12, 2026	▾
13	BRAIDWELL LP CIK 1920938 · View history	$11.33M 2,142,348 shares	0.42%	+443.23K(+26.10%)Added	SEC filing ↗ Aug 14, 2026	▾
14	Balyasny Asset Management L.P. CIK 1218710 · View history	$10.70M 2,023,470 shares	0.02%	-1.34M(-39.80%)Reduced	SEC filing ↗ Aug 14, 2026	▾
15	SILVERARC CAPITAL MANAGEMENT, LLC CIK 1816307 · View history	$10.30M 1,946,482 shares	1.15%	+1.95MNew	SEC filing ↗ Aug 13, 2026	▾
16	Kalehua Capital Management LLC CIK 2106181 · Amended · View history	$9.69M 1,832,365 shares	5.57%	0(0.00%)Unchanged	SEC filing ↗ Aug 19, 2026	▾
17	CITADEL ADVISORS LLC CIK 1423053 · Amended · View history	$9.32M 1,762,081 shares	0.01%	-487.24K(-21.70%)Reduced	SEC filing ↗ Sep 2, 2026	▾
18	Jones Hill Capital LP CIK 2102314 · View history	$9.31M 1,759,492 shares	1.98%	+1.76MNew	SEC filing ↗ Aug 13, 2026	▾
19	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$8.68M 1,641,472 shares	0.01%	+101.68K(+6.60%)Added	SEC filing ↗ Aug 13, 2026	▾
20	Palo Alto Investors LP CIK 1306923 · Amended · View history	$8.54M 1,613,430 shares	1.18%	0(0.00%)Unchanged	SEC filing ↗ Aug 19, 2026	▾

Showing 20 / 148 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

148

Cancelled or null records excluded

Disclosed shares

119,141,634

Not deduplicated across managers

Disclosed value

$630.04M

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. · Q2 2026

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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.