Harbor Capital Advisors’s A10 Networks ATEN Stock Holding History

Harbor Capital Advisors’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 Q1	$4.33M	Sell	187,130 -30,382	-14%	-$594K	0.35%	52
2025 Q4	$3.85M	Sell	217,512 -20,623	-9%	-$365K	0.3%	62
2025 Q3	$4.32M	Sell	238,135 -590,481	-71%	-$10.7M	0.34%	51
2025 Q2	$16M	Buy	828,616 +19,870	+2%	+$339K	0.67%	20
2025 Q1	$13.2M	Sell	808,746 -7,419	-0.9%	-$142K	0.6%	27
2024 Q4	$15M	Buy	816,165 +20,537	+3%	+$335K	0.66%	17
2024 Q3	$11.5M	Buy	795,628 +506,332	+175%	+$6.83M	0.5%	47
2024 Q2	$4.01M	Buy	289,296 +205,760	+246%	+$2.93M	0.31%	78
2024 Q1	$1.14M	Buy	83,536 +70,163	+525%	+$943K	0.15%	181
2023 Q4	$176K	Buy	13,373 +816	+6%	+$9.89K	0.03%	370
2023 Q3	$189K	Sell	12,557 -159	-1%	-$2.35K	0.04%	358
2023 Q2	$186K	Buy	+12,716	New	+$184K	0.04%	369

Other funds holding ATEN

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

PCM

Penserra Capital Management Orinda, California $8.52B AUM 37.76% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

BTW

Boston Trust Walden Boston, Massachusetts $12.2B AUM 12.45% 1-Year Est. Return

Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return

Barclays London, United Kingdom $416B AUM 33.63% 1-Year Est. Return

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

First Trust Advisors Wheaton, Illinois $140B AUM 27.84% 1-Year Est. Return

Harbor Capital Advisors's ATEN Position: Q1 2026 in Review

Harbor Capital Advisors reduced its A10 Networks (ATEN) stake by 14% in Q1 2026, selling an estimated $594K and leaving 187,130 shares worth $4.33M. The position accounts for 0.35% of the portfolio, ranked #52.

Harbor Capital Advisors first reported a position in ATEN in Q2 2023 and has held it in 12 quarters since. The position peaked at $16M in Q2 2025. 264 funds tracked by Wall St. Rank hold ATEN as of Q1 2026.

Harbor Capital Advisors held 187,130 shares of A10 Networks worth $4.33M as of Q1 2026.
Harbor Capital Advisors sold 30,382 A10 Networks shares in Q1 2026, an estimated $594K.
A10 Networks made up 0.35% of Harbor Capital Advisors's portfolio in Q1 2026, its #52 holding.
Harbor Capital Advisors first reported a position in A10 Networks in Q2 2023 and has held it in 12 quarters since.
Harbor Capital Advisors's A10 Networks position peaked at $16M in Q2 2025.
264 funds tracked by Wall St. Rank held A10 Networks as of Q1 2026.

Based on Harbor Capital Advisors's 13F filing for Q1 2026, filed 28 Apr 2026.