Aclaris Therapeutics, Inc.
US ˙ NasdaqGS ˙ US00461U1051

SecurityACRS / Aclaris Therapeutics, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership7,826 shares
Latest Disclosed Value $ 29,348
Citigroup Inc reports 81.20% decrease in ownership of ACRS / Aclaris Therapeutics, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 7,826 shares of Aclaris Therapeutics, Inc. (US:ACRS) valued at $29,348 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 41,630 shares of Aclaris Therapeutics, Inc.. This represents a change in shares of -81.20% during the quarter. The current value of the position is $34,591 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 7,826 -33,804 -81.20 29 -76.80 0.0000
2026-02-13 2025-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 41,630 39,695 2,051.42 125 4,066.67 0.0001
2025-11-10 2025-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 1,935 -29,270 -93.80 4 -93.18 0.0000
2025-08-11 2025-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 31,205 25,056 407.48 44 388.89 0.0000
2025-05-12 2025-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 6,149 -53,823 -89.75 9 -93.92 0.0000
2025-02-12 2024-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 59,972 57,885 2,773.60 149 7,300.00 0.0001
2024-11-12 2024-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 2,087 -11,384 -84.51 2 -85.71 0.0000
2024-08-12 2024-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 13,471 1,136 9.21 15 -6.67 0.0000
2024-05-10 2024-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 12,335 -495,173 -97.57 15 -97.18 0.0000
2024-02-09 2023-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 507,508 495,644 4,177.71 533 556.79 0.0004
2023-12-06 2023-09-30 13F/A-1 ACLARIS THERAPEUTICS COM 00461U105 11,864 -18,213 -60.55 81 -73.95 0.0001
2023-11-09 2023-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 11,864 -18,213 81 0.0001
2023-08-10 2023-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 30,077 -46,465 -60.71 312 -49.76 0.0002
2023-05-11 2023-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 76,542 58,256 318.58 619 114.93 0.0004
2023-02-09 2022-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 18,286 10,003 120.77 288 121.54 0.0002
2022-11-10 2022-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 8,283 -5,156 -38.37 130 -30.48 0.0001
2022-08-10 2022-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 13,439 5,047 60.14 187 28.97 0.0001
2022-05-12 2022-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 8,392 -9,199 -52.29 145 -43.36 0.0001
2022-02-10 2021-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 17,591 -6,752 -27.74 256 -41.55 0.0001
2021-11-10 2021-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 24,343 15,330 170.09 438 177.22 0.0003
2021-08-10 2021-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 9,013 2,840 46.01 158 1.28 0.0001
2021-05-13 2021-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 6,173 -36,302 -85.47 156 -43.27 0.0001
2021-02-11 2020-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 42,475 42,475 275 0.0002
2020-08-12 2020-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 0 -9,838 -100.00 0 -100.00
2020-05-12 2020-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 9,838 3,652 59.04 10 -16.67 0.0000
2020-02-12 2019-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 6,186 4,073 192.76 12 500.00 0.0000
2019-11-08 2019-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 2,113 -14,741 -87.46 2 -94.59 0.0000
2019-08-12 2019-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 16,854 3,601 27.17 37 -53.16 0.0000
2019-05-13 2019-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 13,253 9,260 231.91 79 163.33 0.0001
2019-02-12 2018-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 3,993 3,872 3,200.00 30 2,900.00 0.0000
2018-11-13 2018-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 121 60 98.36 1 0.00 0.0000
2018-08-10 2018-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 61 -58 -48.74 1 -50.00 0.0000
2018-05-11 2018-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 119 -81 -40.50 2 -60.00 0.0000
2018-02-12 2017-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 200 126 170.27 5 150.00 0.0000
2017-11-13 2017-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 74 -4,239 -98.28 2 -98.29 0.0000
2017-08-11 2017-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 4,313 2,726 171.77 117 148.94 0.0001
2017-05-12 2017-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 1,587 -9,884 -86.17 47 -84.89 0.0000
2017-02-10 2016-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 11,471 10,617 1,243.21 311 1,313.64 0.0003
2016-11-10 2016-09-30 13F ACLARIS THERAPEUTICS COM 00461U105 854 -127 -12.95 22 22.22 0.0000
2016-08-12 2016-06-30 13F ACLARIS THERAPEUTICS COM 00461U105 981 -7,509 -88.45 18 -88.82 0.0000
2016-05-13 2016-03-31 13F ACLARIS THERAPEUTICS COM 00461U105 8,490 6,754 389.06 161 242.55 0.0002
2016-02-12 2015-12-31 13F ACLARIS THERAPEUTICS COM 00461U105 1,736 1,736 47 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.