A10 NETWORKS INC

Ticker: ATEN CUSIP: 002121101 Class: Common Stock

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP's Holding History (CIK: 0001164508)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 1,095,287 Value ($000) $19,376 Avg Close $17.63 Range $16.47 - $18.68

Q3 2025

Shares 1,226,347 Value ($000) $22,258 Avg Close $17.94 Range $16.64 - $20.08

Q2 2025

Shares 1,306,664 Value ($000) $25,284 Avg Close $16.89 Range $13.63 - $19.29

Q1 2025

Shares 938,763 Value ($000) $15,339 Avg Close $18.93 Range $15.81 - $21.61

Q4 2024

Shares 246,967 Value ($000) $4,544 Avg Close $16.04 Range $13.74 - $19.06

Q3 2024

Shares 62,005 Value ($000) $895 Avg Close $13.19 Range $11.97 - $14.22

Q1 2024

Shares 29,887 Value ($000) $0 Avg Close $13.04 Range $12.00 - $14.51

Q2 2023

Shares 161,947 Value ($000) $2 Avg Close $13.85 Range $12.41 - $15.07

Q1 2023

Shares 246,787 Value ($000) $4 Avg Close $14.54 Range $13.22 - $16.17

Q4 2022

Shares 77,432 Value ($000) $1 Avg Close $16.27 Range $12.65 - $18.76

Q4 2021

Shares 19,941 Value ($000) $331 Avg Close $14.22 Range $11.86 - $17.82

Q1 2021

Shares 437,136 Value ($000) $4,201 Avg Close $9.16 Range $8.05 - $11.09

Q4 2020

Shares 798,540 Value ($000) $7,874 Avg Close $7.35 Range $5.73 - $10.23

Q3 2020

Shares 640,740 Value ($000) $4,082 Avg Close $7.17 Range $5.86 - $8.61

Q2 2020

Shares 517,123 Value ($000) $3,522 Avg Close $6.28 Range $5.31 - $7.19

Q1 2020

Shares 282,021 Value ($000) $1,751 Avg Close $5.98 Range $3.21 - $7.01

Q4 2019

Shares 632,321 Value ($000) $4,344 Avg Close $6.29 Range $5.61 - $7.11

Q3 2019

Shares 405,110 Value ($000) $2,811 Avg Close $6.73 Range $6.28 - $7.75

Q2 2019

Shares 594,876 Value ($000) $4,057 Avg Close $6.13 Range $5.55 - $6.89

Q1 2019

Shares 905,902 Value ($000) $6,423 Avg Close $6.36 Range $5.62 - $6.93

Q4 2018

Shares 186,554 Value ($000) $1,164 Avg Close $5.66 Range $5.15 - $6.19

Q3 2018

Shares 166,058 Value ($000) $1,010 Avg Close $6.32 Range $5.61 - $6.98

Q4 2017

Shares 11,900 Value ($000) $92 Avg Close $7.14 Range $6.69 - $7.72

Q2 2017

Shares 449,967 Value ($000) $3,798 Avg Close $7.94 Range $7.25 - $9.12

Q1 2017

Shares 571,940 Value ($000) $5,233 Avg Close $8.27 Range $7.16 - $9.30

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	1,095,287	$19,376	$17.63	$16.47 - $18.68
Q3 2025	1,226,347	$22,258	$17.94	$16.64 - $20.08
Q2 2025	1,306,664	$25,284	$16.89	$13.63 - $19.29
Q1 2025	938,763	$15,339	$18.93	$15.81 - $21.61
Q4 2024	246,967	$4,544	$16.04	$13.74 - $19.06
Q3 2024	62,005	$895	$13.19	$11.97 - $14.22
Q1 2024	29,887	$0	$13.04	$12.00 - $14.51
Q2 2023	161,947	$2	$13.85	$12.41 - $15.07
Q1 2023	246,787	$4	$14.54	$13.22 - $16.17
Q4 2022	77,432	$1	$16.27	$12.65 - $18.76
Q4 2021	19,941	$331	$14.22	$11.86 - $17.82
Q1 2021	437,136	$4,201	$9.16	$8.05 - $11.09
Q4 2020	798,540	$7,874	$7.35	$5.73 - $10.23
Q3 2020	640,740	$4,082	$7.17	$5.86 - $8.61
Q2 2020	517,123	$3,522	$6.28	$5.31 - $7.19
Q1 2020	282,021	$1,751	$5.98	$3.21 - $7.01
Q4 2019	632,321	$4,344	$6.29	$5.61 - $7.11
Q3 2019	405,110	$2,811	$6.73	$6.28 - $7.75
Q2 2019	594,876	$4,057	$6.13	$5.55 - $6.89
Q1 2019	905,902	$6,423	$6.36	$5.62 - $6.93
Q4 2018	186,554	$1,164	$5.66	$5.15 - $6.19
Q3 2018	166,058	$1,010	$6.32	$5.61 - $6.98
Q4 2017	11,900	$92	$7.14	$6.69 - $7.72
Q2 2017	449,967	$3,798	$7.94	$7.25 - $9.12
Q1 2017	571,940	$5,233	$8.27	$7.16 - $9.30