AtriCure, Inc.
US ˙ NasdaqGM ˙ US04963C2098

SecurityATRC / AtriCure, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership85,116 shares
Latest Disclosed Value $ 2,428,359
Man Group plc reports 389.14% increase in ownership of ATRC / AtriCure, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 85,116 shares of AtriCure, Inc. (US:ATRC) valued at $2,428,359 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 17,401 shares of AtriCure, Inc.. This represents a change in shares of 389.14% during the quarter. The current value of the position is $2,230,039 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)
2026-05-15 2026-03-31 13F ATRICURE COM 04963C209 85,116 67,715 389.14 2,428 252.91 0.0044
2026-02-17 2025-12-31 13F ATRICURE COM 04963C209 17,401 -42,094 -70.75 688 -67.19 0.0012
2025-11-14 2025-09-30 13F ATRICURE COM 04963C209 59,495 -22,898 -27.79 2,097 -22.33 0.0036
2025-08-14 2025-06-30 13F ATRICURE COM 04963C209 82,393 22,784 38.22 2,700 40.48 0.0051
2025-05-15 2025-03-31 13F ATRICURE COM 04963C209 59,609 35,241 144.62 1,923 158.33 0.0049
2025-02-14 2024-12-31 13F ATRICURE COM 04963C209 24,368 24,368 745 0.0020
2024-11-14 2024-09-30 13F ATRICURE COM 04963C209 0 -18,570 -100.00 0 -100.00
2024-08-14 2024-06-30 13F ATRICURE COM 04963C209 18,570 -12,692 -40.60 423 -55.58 0.0011
2024-05-15 2024-03-31 13F ATRICURE COM 04963C209 31,262 951 -59.42 0.0024
2023-11-14 2023-09-30 13F ATRICURE COM 04963C209 2,342 -62.05 0.0073
2023-08-14 2023-06-30 13F ATRICURE COM 04963C209 124,973 6,169 72.29 0.0190
2023-05-15 2023-03-31 13F ATRICURE COM 04963C209 3,580 -25.43 0.0127
2023-02-14 2022-12-31 13F ATRICURE COM 04963C209 108,183 950 0.89 4,801 14.50 0.0172
2022-11-14 2022-09-30 13F ATRICURE COM 04963C209 107,233 4,193 -4.42 0.0195
2022-08-15 2022-06-30 13F ATRICURE COM 04963C209 4,387 -42.53 0.0186
2022-05-16 2022-03-31 13F ATRICURE COM 04963C209 116,253 -1,096 -0.93 7,634 -6.43 0.0266
2022-02-14 2021-12-31 13F ATRICURE COM 04963C209 117,349 -16,845 -12.55 8,159 -12.58 0.0262
2021-11-15 2021-09-30 13F ATRICURE COM 04963C209 134,194 -4,094 -2.96 9,333 -14.92 0.0327
2021-08-16 2021-06-30 13F ATRICURE COM 04963C209 138,288 -19,608 -12.42 10,970 6.04 0.0386
2021-05-17 2021-03-31 13F ATRICURE COM 04963C209 157,896 -59,952 -27.52 10,345 -14.70 0.0455
2021-02-16 2020-12-31 13F ATRICURE COM 04963C209 217,848 14,452 7.11 12,128 49.43 0.0532
2020-11-16 2020-09-30 13F ATRICURE COM 04963C209 203,396 48,208 31.06 8,116 16.34 0.0319
2020-08-14 2020-06-30 13F ATRICURE COM 04963C209 155,188 137,071 756.59 6,976 1,045.48 0.0352
2020-05-15 2020-03-31 13F ATRICURE COM 04963C209 18,117 -185,253 -91.09 609 -90.79 0.0039
2020-02-18 2019-12-31 13F ATRICURE COM 04963C209 203,370 -125,761 -38.21 6,611 -19.46 0.0217
2019-11-14 2019-09-30 13F ATRICURE COM 04963C209 329,131 -130,902 -28.45 8,208 -40.21 0.0305
2019-08-14 2019-06-30 13F ATRICURE COM 04963C209 460,033 116,421 33.88 13,728 49.14 0.0496
2019-05-15 2019-03-31 13F ATRICURE COM 04963C209 343,612 22,121 6.88 9,205 -6.43 0.0349
2019-02-14 2018-12-31 13F ATRICURE COM 04963C209 321,491 108,089 50.65 9,838 31.61 0.0438
2018-11-14 2018-09-30 13F ATRICURE COM 04963C209 213,402 153,381 255.55 7,475 360.28 0.0273
2018-08-14 2018-06-30 13F ATRICURE COM 04963C209 60,021 60,021 1,624 0.0067
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.