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ATRC — ATRICURE INC

Reported value held$790.66M
Funds holding (latest)43
SectorHealth Care
Funds holding (Q2 2026)37
Institutional value$588.10M · 21.09M sh
New / Add / Cut / Exit2 / 25 / 10 / 4
Top-5 / Top-10 concentration58.1% / 76.7%
Institutional holdings change Accumulating +15.7% (+2.86M sh)
Institutional value change Up +13.5%

As of Q2 2026, 37 SEC-registered investment managers reported holding ATRC (ATRICURE INC) in their latest 13F filings, with a combined reported value of $588.10M across 21.09M shares. That is +15.7% by share count (+2.86M shares) versus the previous quarter, while reported value moved +13.5%. Ownership is concentrated: the five largest holders account for 58.1% of reported value and the top ten for 76.7%.

Compared with the prior quarter, 2 opened new positions, 25 added to existing stakes, 10 trimmed, 4 exited entirely. 13F holdings are quarter-end snapshots, so these moves reflect positioning as of Q2 2026, not real-time trading.

ATRC is classified in the Health Care sector.

All figures on this page are computed from SEC Form 13F quarterly filings. 13F filers disclose long positions of $100,000 or more within 45 days of quarter end; short positions, options overlays and intra-quarter trades are not included, so treat the numbers as a quarterly snapshot of institutional ownership rather than real-time positioning.

FundQuarterSharesValuePortfolio WeightChange
Vanguard Group history Q4 2025 4.90M $193.99M 0.00% Add
BlackRock Inc history Q2 2026 4.47M $125.20M 0.00% Add
Wellington Management Group history Q2 2026 3.50M $97.81M 0.02% Add
Goldman Sachs Group history Q2 2026 1.60M $44.71M 0.00% Reduce
Marshall Wace history Q2 2026 1.33M $37.32M 0.03% Reduce
Geode Capital Management history Q2 2026 1.32M $36.93M 0.00% Add
Arrowstreet Capital history Q2 2026 1.30M $36.27M 0.02% Add
Bank of America Corp history Q2 2026 874.37K $24.46M 0.00% Add
Point72 Asset Management history Q2 2026 604.38K $16.91M 0.02% New
MFS Investment Management history Q2 2026 580.62K $16.25M 0.01% Reduce
AQR Capital Management history Q2 2026 544.12K $15.22M 0.01% Add
Two Sigma Investments history Q2 2026 525.79K $14.71M 0.01% Reduce
Fidelity Management & Research (FMR) history Q2 2026 506.36K $14.17M 0.00% Add
Northern Trust Corp history Q2 2026 482.04K $13.49M 0.00% Add
Morgan Stanley history Q2 2026 457.80K $12.81M 0.00% Reduce
Charles Schwab Investment Management history Q2 2026 423.11K $11.84M 0.00% Reduce
Norges Bank Investment Management history Q2 2026 374.36K $10.47M 0.00% Add
First Eagle Investment Management history Q2 2026 297.64K $8.33M 0.01% Add
Amundi US history Q2 2026 264.85K $7.41M 0.00% Add
Renaissance Technologies history Q2 2026 234.10K $6.55M 0.01% Reduce

View all 43 fund holders →

New Positions (Q2 2026)

Fully Exited (vs previous quarter)

Fund Position History — shares by quarter (top 20 funds)

FundQ3 2021Q4 2021Q1 2022Q2 2022Q3 2022Q4 2022Q1 2023Q2 2023Q3 2023Q4 2023Q1 2024Q2 2024Q3 2024Q4 2024Q1 2025Q2 2025Q3 2025Q4 2025Q1 2026Q2 2026
BlackRock Inc — — — — — — — — — — — — 4.31M 4.31M 4.22M 4.02M 4.00M 4.07M 4.04M 4.47M
Wellington Management Group 382.76K 382.39K 363.29K 370.92K 287.35K 1.61M 1.48M 1.29M 1.23M 1.33M 1.64M 1.54M 1.54M 654.50K 702.05K 3.97M 4.29M 3.92M 3.38M 3.50M
Goldman Sachs Group 83.38K 56.02K 59.66K 90.03K 108.00K 225.48K 237.94K 261.90K 242.06K 355.60K 403.40K 583.78K 422.50K 853.71K 862.67K 745.03K 777.31K 885.06K 1.67M 1.60M
Marshall Wace — 723 — 21.54K 14.28K — 551.87K 384.94K 368.66K 435.41K 961.36K 447.94K 451.69K 619.17K 994.09K 1.01M 559.17K 913.45K 1.47M 1.33M
Geode Capital Management 815.63K 812.05K 812.18K 820.33K 834.61K 866.07K 903.04K 948.92K 986.41K 1.03M 1.06M 1.12M 1.15M 1.15M 1.17M 1.18M 1.19M 1.19M 1.23M 1.32M
Arrowstreet Capital — — — — — — — — — 10.00K 69.03K — — 26.69K — — — — 277.68K 1.30M
Bank of America Corp 510.65K 513.85K 510.13K 512.94K 469.46K 414.46K 459.74K 397.62K 400.82K 361.79K 603.57K 690.39K 599.51K 390.82K 613.86K 710.17K 724.96K 675.73K 768.56K 874.37K
Point72 Asset Management — 104.49K 159.79K 24.40K — — 115.22K 183.50K 4 — — — — — 558.35K — — 277.92K — 604.38K
MFS Investment Management — — — — — — — — — — — — — — — — 424.68K 511.21K 585.35K 580.62K
AQR Capital Management 12.04K 12.01K 13.92K 8.70K 8.50K 6.41K 5.14K 5.46K 10.05K 13.27K 42.49K 58.74K 75.32K 82.85K 83.69K 67.71K 84.17K 99.96K 186.38K 544.12K
Two Sigma Investments 66.28K — — 77.62K 111.37K 85.96K 238.13K 200.52K 217.33K 192.74K 226.18K 643.03K 717.78K 611.00K 667.92K 411.91K 452.88K 380.50K 751.00K 525.79K
Fidelity Management & Research (FMR) 14.90K 16.18K 40.46K 49.06K 48.39K 69.23K 60.28K 60.44K 102.43K 75.89K 2.48M 2.11M 973.46K 981.52K 992.96K 270.29K 394.00K 285.76K 336.81K 506.36K
Northern Trust Corp 488.97K 482.13K 461.07K 455.34K 609.80K 610.96K 608.39K 612.51K 613.84K 465.16K 456.82K 435.69K 433.45K 483.61K 466.20K 465.26K 462.09K 438.21K 449.60K 482.04K
Morgan Stanley 49.53K 49.45K 51.32K 129.37K 146.52K 218.09K 281.09K 243.94K 252.70K 494.78K 969.89K 391.45K 383.81K 383.36K 386.94K 252.09K 188.82K 346.12K 719.16K 457.80K
Charles Schwab Investment Management 317.12K 323.96K 331.32K 326.43K 335.20K 343.78K 344.72K 351.21K 362.99K 367.15K 375.84K 388.77K 394.58K 399.43K 392.86K 407.42K 427.90K 437.88K 429.83K 423.11K
Norges Bank Investment Management — — — — — 351.99K — — — 259.28K — 184.31K — 111.95K — 10.44K — 214.02K — 374.36K
First Eagle Investment Management — — — — — — — — — — — — — — — — — 116.61K 262.14K 297.64K
Amundi US — — — — 158.47K 207.49K 203.90K 195.79K 208.76K 298.89K 260.99K 329.08K 301.85K 270.45K 254.93K 241.69K 219.38K 230.85K 225.93K 264.85K
Renaissance Technologies 65.20K — — 80.10K 109.80K 98.80K 134.70K 96.80K 141.40K 94.30K 152.20K 171.70K 98.10K 163.90K 307.90K 377.70K 258.80K 321.90K 308.70K 234.10K
D. E. Shaw & Co 29.75K 42.42K 94.68K 213.99K 193.46K 116.06K 178.83K 152.00K 71.75K 109.02K 155.19K 105.58K 117.30K 67.46K 25.36K 7.78K — — 56.59K 192.82K

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