GAMCO Investors’s A10 Networks ATEN Stock Holding History

GAMCO Investors’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	$600K	Sell	16,050 -26,700	-62%	-$776K	0.01%	701
2026 Q1	$988K	Hold	42,750	–	–	0.01%	627
2025 Q4	$756K	Buy	42,750 +750	+2%	+$13.3K	0.01%	711
2025 Q3	$762K	Sell	42,000 -2,000	-5%	-$36.2K	0.01%	704
2025 Q2	$851K	Hold	44,000	–	–	0.01%	700
2025 Q1	$719K	Hold	44,000	–	–	0.01%	615
2024 Q4	$810K	Hold	44,000	–	–	0.01%	617
2024 Q3	$635K	Hold	44,000	–	–	0.01%	665
2024 Q2	$609K	Hold	44,000	–	–	0.01%	670
2024 Q1	$602K	Hold	44,000	–	–	0.01%	670
2023 Q4	$579K	Sell	44,000 -3,000	-6%	-$36.4K	0.01%	677
2023 Q3	$706K	Hold	47,000	–	–	0.01%	627
2023 Q2	$686K	Hold	47,000	–	–	0.01%	639
2023 Q1	$728K	Sell	47,000 -500	-1%	-$7.63K	0.01%	643
2022 Q4	$790K	Sell	47,500 -1,400	-3%	-$24K	0.01%	635
2022 Q3	$649K	Hold	48,900	–	–	0.01%	642
2022 Q2	$703K	Sell	48,900 -3,100	-6%	-$44.9K	0.01%	641
2022 Q1	$725K	Sell	52,000 -500	-1%	-$7.03K	0.01%	672
2021 Q4	$870K	Hold	52,500	–	–	0.01%	655
2021 Q3	$708K	Sell	52,500 -17,007	-24%	-$221K	0.01%	683
2021 Q2	$783K	Sell	69,507 -3,000	-4%	-$29K	0.01%	692
2021 Q1	$697K	Sell	72,507 -1,000	-1%	-$9.79K	0.01%	700
2020 Q4	$725K	Sell	73,507 -5,000	-6%	-$39.3K	0.01%	661
2020 Q3	$500K	Hold	78,507	–	–	0.01%	673
2020 Q2	$535K	Buy	78,507 +51,507	+191%	+$346K	0.01%	656
2020 Q1	$168K	Buy	+27,000	New	+$173K	﹤0.01%	810

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 $3.37T AUM 44.26% 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

GAMCO Investors's ATEN Position: Q2 2026 in Review

GAMCO Investors reduced its A10 Networks (ATEN) stake by 62% in Q2 2026, selling an estimated $776K and leaving 16,050 shares worth $600K. The position accounts for 0.01% of the portfolio, ranked #701.

GAMCO Investors first reported a position in ATEN in Q1 2020 and has held it in 26 quarters since. The position peaked at $988K in Q1 2026. 310 funds tracked by Wall St. Rank hold ATEN as of Q2 2026.

GAMCO Investors held 16,050 shares of A10 Networks worth $600K as of Q2 2026.
GAMCO Investors sold 26,700 A10 Networks shares in Q2 2026, an estimated $776K.
A10 Networks made up 0.01% of GAMCO Investors's portfolio in Q2 2026, its #701 holding.
GAMCO Investors first reported a position in A10 Networks in Q1 2020 and has held it in 26 quarters since.
GAMCO Investors's A10 Networks position peaked at $988K in Q1 2026.
310 funds tracked by Wall St. Rank held A10 Networks as of Q2 2026.

Based on GAMCO Investors's 13F filing for Q2 2026, filed 12 Aug 2026.