Portolan Capital Management’s A10 Networks ATEN Stock Holding History

Portolan Capital Management’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	$8.48M	Buy	+226,920	New	+$6.59M	0.32%	88
2023 Q2	–	Sell	-45,759	Closed	-$709K	–	126
2023 Q1	$709K	Buy	45,759 +4,727	+12%	+$72.1K	0.07%	134
2022 Q4	$682K	Sell	41,032 -247,428	-86%	-$4.24M	0.07%	126
2022 Q3	$3.83M	Sell	288,460 -238,803	-45%	-$3.4M	0.4%	88
2022 Q2	$7.58M	Buy	+527,263	New	+$7.64M	0.76%	51

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

Portolan Capital Management's ATEN Position: Q2 2026 in Review

Portolan Capital Management opened a new position in A10 Networks (ATEN) in Q2 2026: 226,920 shares worth $8.48M. The stake represents 0.32% of the portfolio and ranks #88 among its holdings. This is a return to the name: Portolan Capital Management previously reported a position in ATEN as recently as Q1 2023.

Portolan Capital Management first reported a position in ATEN in Q2 2022 and has held it in 5 quarters since. 311 funds tracked by Wall St. Rank hold ATEN as of Q2 2026.

Portolan Capital Management held 226,920 shares of A10 Networks worth $8.48M as of Q2 2026.
A10 Networks was a new Portolan Capital Management position in Q2 2026.
A10 Networks made up 0.32% of Portolan Capital Management's portfolio in Q2 2026, its #88 holding.
Portolan Capital Management first reported a position in A10 Networks in Q2 2022 and has held it in 5 quarters since.
311 funds tracked by Wall St. Rank held A10 Networks as of Q2 2026.

Based on Portolan Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.