Bank of Montreal’s A10 Networks ATEN Stock Holding History

Bank of Montreal’s Portfolio ATEN Stock Details ATEN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q2	$230K	Buy	+6,152	New	+$179K	﹤0.01%	2920
2025 Q3	–	Sell	-11,719	Closed	-$227K	–	3527
2025 Q2	$227K	Sell	11,719 -33	-0.3%	-$564	﹤0.01%	2737
2025 Q1	$192K	Buy	+11,752	New	+$226K	﹤0.01%	2742
2021 Q4	–	Sell	-344,140	Closed	-$4.67M	–	3495
2021 Q3	$4.67M	Buy	344,140 +174,421	+103%	+$2.26M	﹤0.01%	1670
2021 Q2	$1.95M	Buy	169,719 +168,020	+9,889%	+$1.63M	﹤0.01%	2079
2021 Q1	$16K	Sell	1,699 -7,756	-82%	-$75.9K	﹤0.01%	4138
2020 Q4	$87K	Buy	9,455 +6,515	+222%	+$51.2K	﹤0.01%	3657
2020 Q3	$20K	Sell	2,940 -1,992	-40%	-$15.3K	﹤0.01%	3832
2020 Q2	$36K	Buy	+4,932	New	+$33.1K	﹤0.01%	3582
2020 Q1	–	Sell	-6,218	Closed	-$43K	–	4092
2019 Q4	$43K	Buy	6,218 +1,258	+25%	+$8.46K	﹤0.01%	3909
2019 Q3	$34K	Sell	4,960 -471	-9%	-$3.39K	﹤0.01%	3808
2019 Q2	$37K	Sell	5,431 -18,807	-78%	-$123K	﹤0.01%	3823
2019 Q1	$171K	Buy	24,238 +22,811	+1,599%	+$155K	﹤0.01%	2792
2018 Q4	$9K	Buy	1,427 +391	+38%	+$2.37K	﹤0.01%	3909
2018 Q3	$6K	Sell	1,036 -10	-1%	-$68	﹤0.01%	4055
2018 Q2	$6K	Buy	1,046 +354	+51%	+$2.21K	﹤0.01%	4073
2018 Q1	$4K	Hold	692	–	–	﹤0.01%	3944
2017 Q4	$5K	Sell	692 -100	-13%	-$763	﹤0.01%	3913
2017 Q3	$6K	Sell	792 -117,415	-99%	-$799K	﹤0.01%	3824
2017 Q2	$998K	Sell	118,207 -32,932	-22%	-$280K	﹤0.01%	1979
2017 Q1	$1.38M	Sell	151,139 -22,070	-13%	-$195K	﹤0.01%	1731
2016 Q4	$1.42M	Buy	173,209 +144,850	+511%	+$1.25M	﹤0.01%	1740
2016 Q3	$303K	Hold	28,359	–	–	﹤0.01%	2281
2016 Q2	$183K	Hold	28,359	–	–	﹤0.01%	2513
2016 Q1	$168K	Hold	28,359	–	–	﹤0.01%	2561
2015 Q4	$186K	Buy	+28,359	New	+$196K	﹤0.01%	2460

Other funds holding ATEN

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

First Trust Advisors Wheaton, Illinois $170B AUM 46.21% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

PCM

Penserra Capital Management Orinda, California $13B AUM 71.84% 1-Year Est. Return

BTW

Boston Trust Walden Boston, Massachusetts $13.1B AUM 24.63% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Bank of Montreal's ATEN Position: Q2 2026 in Review

Bank of Montreal opened a new position in A10 Networks (ATEN) in Q2 2026: 6,152 shares worth $230K. The stake represents ﹤0.01% of the portfolio and ranks #2920 among its holdings. This is a return to the name: Bank of Montreal previously reported a position in ATEN as recently as Q2 2025.

Bank of Montreal first reported a position in ATEN in Q4 2015 and has held it in 26 quarters since. The position peaked at $4.67M in Q3 2021. 311 funds tracked by Wall St. Rank hold ATEN as of Q2 2026.

Bank of Montreal held 6,152 shares of A10 Networks worth $230K as of Q2 2026.
A10 Networks was a new Bank of Montreal position in Q2 2026.
A10 Networks made up ﹤0.01% of Bank of Montreal's portfolio in Q2 2026, its #2920 holding.
Bank of Montreal first reported a position in A10 Networks in Q4 2015 and has held it in 26 quarters since.
Bank of Montreal's A10 Networks position peaked at $4.67M in Q3 2021.
311 funds tracked by Wall St. Rank held A10 Networks as of Q2 2026.

Based on Bank of Montreal's 13F filing for Q2 2026, filed 12 Aug 2026.