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Oberweis Asset Management’s AtriCure ATRC Stock Holding History

Oberweis Asset Management’s Portfolio ATRC Stock Details ATRC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-217,992
Closed -$8.62M – 181
2025
Q4 		$8.62M Buy
217,992
+64,492
+42% +$2.36M 0.32% 117
2025
Q3 		$5.41M Buy
+153,500
New +$5.29M 0.21% 143
2025
Q2 		– Sell
-151,500
Closed -$4.89M – 186
2025
Q1 		$4.89M Hold
151,500
– – 0.24% 131
2024
Q4 		$4.63M Buy
+151,500
New +$4.87M 0.22% 146
2024
Q1 		– Sell
-69,100
Closed -$2.47M – 196
2023
Q4 		$2.47M Buy
69,100
+21,800
+46% +$811K 0.23% 158
2023
Q3 		$2.07M Buy
+47,300
New +$2.31M 0.22% 154
2019
Q4 		– Sell
-139,600
Closed -$3.48M – 201
2019
Q3 		$3.48M Sell
139,600
-65,350
-32% -$1.87M 0.79% 32
2019
Q2 		$6.12M Buy
204,950
+1,540
+0.8% +$45K 1.11% 20
2019
Q1 		$5.45M Sell
203,410
-27,710
-12% -$842K 1.09% 24
2018
Q4 		$7.07M Sell
231,120
-7,090
-3% -$221K 1.58% 12
2018
Q3 		$8.34M Buy
238,210
+11,291
+5% +$357K 1.62% 16
2018
Q2 		$6.14M Buy
+226,919
New +$5.33M 1.54% 20
2016
Q1 		– Sell
-25,500
Closed -$572K – 177
2015
Q4 		$572K Buy
25,500
+2,400
+10% +$49.5K 0.16% 106
2015
Q3 		$506K Buy
23,100
+3,500
+18% +$87.5K 0.15% 92
2015
Q2 		$483K Hold
19,600
– – 0.13% 97
2015
Q1 		$402K Sell
19,600
-18,400
-48% -$356K 0.11% 115
2014
Q4 		$758K Hold
38,000
– – 0.23% 66
2014
Q3 		$559K Buy
38,000
+1,800
+5% +$28.7K 0.15% 78
2014
Q2 		$665K Buy
+36,200
New +$603K 0.16% 97

Other funds holding ATRC

AllianceBernstein
AllianceBernstein Nashville, Tennessee $309B AUM 23.92% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
HRCM
Hood River Capital Management Palm Beach Gardens, Florida $9.98B AUM 145.42% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
NAMI
Nomura Asset Management International Philadelphia, Pennsylvania $58.4B AUM
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Oberweis Asset Management's ATRC Position: Q1 2026 in Review

Oberweis Asset Management sold out of AtriCure (ATRC) in Q1 2026, closing a stake of 217,992 shares — an estimated $8.62M sold.

Oberweis Asset Management first reported a position in ATRC in Q2 2014 and held it in 19 quarters. The position peaked at $8.62M in Q4 2025. 223 funds tracked by Wall St. Rank hold ATRC as of Q1 2026.

  • Oberweis Asset Management reported no remaining AtriCure position as of Q1 2026 after selling out during the quarter.
  • Oberweis Asset Management sold 217,992 AtriCure shares in Q1 2026, an estimated $8.62M.
  • Oberweis Asset Management first reported a position in AtriCure in Q2 2014 and held it in 19 quarters.
  • Oberweis Asset Management's AtriCure position peaked at $8.62M in Q4 2025.
  • 223 funds tracked by Wall St. Rank held AtriCure as of Q1 2026.

Based on Oberweis Asset Management's 13F filing for Q1 2026, filed 15 May 2026.