A10 Networks, Inc.
US ˙ NYSE ˙ US0021211018

SecurityATEN / A10 Networks, Inc.
InstitutionDynamic Technology Lab Private Ltd
Latest Disclosed Ownership9,140 shares
Latest Disclosed Value $ 211,317
Dynamic Technology Lab Private Ltd reports 57.18% decrease in ownership of ATEN / A10 Networks, Inc.

On May 15, 2026 - Dynamic Technology Lab Private Ltd filed a 13F-HR form disclosing ownership of 9,140 shares of A10 Networks, Inc. (US:ATEN) valued at $211,317 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 21,347 shares of A10 Networks, Inc.. This represents a change in shares of -57.18% during the quarter. The current value of the position is $279,410 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F A10 NETWORKS COM 002121101 9,140 -12,207 -57.18 211 -44.18 0.0343
2026-02-13 2025-12-31 13F A10 NETWORKS COM 002121101 21,347 21,347 378 0.0856
2025-08-12 2025-06-30 13F A10 NETWORKS COM 002121101 0 -54,855 -100.00 0 -100.00
2025-05-16 2025-03-31 13F A10 NETWORKS COM 002121101 54,855 54,855 897 0.1298
2024-11-13 2024-09-30 13F A10 NETWORKS COM 002121101 0 -88,101 -100.00 0 -100.00
2024-08-15 2024-06-30 13F A10 NETWORKS COM 002121101 88,101 88,101 1 0.1378
2023-05-12 2023-03-31 13F A10 NETWORKS COM 002121101 0 -12,245 -100.00 0 -100.00
2023-02-14 2022-12-31 13F A10 NETWORKS COM 002121101 12,245 12,245 204 0.0204
2022-11-14 2022-09-30 13F A10 NETWORKS COM 002121101 0 -10,832 -100.00 0 -100.00
2022-08-12 2022-06-30 13F A10 NETWORKS COM 002121101 10,832 -22,846 -67.84 156 -66.81 0.0176
2022-05-16 2022-03-31 13F A10 NETWORKS COM 002121101 33,678 -17,057 -33.62 470 -44.11 0.0554
2022-02-14 2021-12-31 13F A10 NETWORKS COM 002121101 50,735 50,735 841 0.0931
2021-08-13 2021-06-30 13F A10 NETWORKS COM 002121101 0 -27,041 -100.00 0 -100.00
2021-05-14 2021-03-31 13F A10 NETWORKS COM 002121101 27,041 27,041 260 0.0294
2021-02-11 2020-12-31 13F A10 NETWORKS COM 002121101 0 -56,322 -100.00 0 -100.00
2020-11-13 2020-09-30 13F A10 NETWORKS COM 002121101 56,322 -676 -1.19 359 -7.47 0.0578
2020-08-14 2020-06-30 13F A10 NETWORKS COM 002121101 56,998 56,998 388 0.0584
2020-05-13 2020-03-31 13F A10 NETWORKS COM 002121101 0 -11,077 -100.00 0 -100.00
2020-02-14 2019-12-31 13F A10 NETWORKS COM 002121101 11,077 11,077 76 0.0122
2019-05-13 2019-03-31 13F A10 NETWORKS COM 002121101 0 -31,306 -100.00 0 -100.00
2019-02-13 2018-12-31 13F A10 NETWORKS COM 002121101 31,306 -13,205 -29.67 195 -27.78 0.0337
2018-11-14 2018-09-30 13F A10 NETWORKS COM 002121101 44,511 44,511 270 0.0375
2018-06-14 2018-03-31 13F/A-1 A10 NETWORKS COM 002121101 0 -14,505 -100.00 0 -100.00
2018-02-09 2017-12-31 13F A10 NETWORKS COM 002121101 14,505 -59,286 -80.34 112 -79.93 0.0199
2017-11-08 2017-09-30 13F A10 NETWORKS COM 002121101 73,791 56,187 319.17 558 274.50 0.0906
2017-08-17 2017-06-30 13F A10 NETWORKS COM 002121101 17,604 -4,510 -20.39 149 -26.60 0.0281
2017-05-11 2017-03-31 13F A10 NETWORKS COM 002121101 22,114 22,114 203 0.0476
2016-11-14 2016-09-30 13F A10 NETWORKS COM 002121101 0 -35,819 -100.00 0 -100.00
2016-08-10 2016-06-30 13F A10 NETWORKS COM 002121101 35,819 1,312 3.80 232 13.73 0.0628
2016-05-18 2016-03-31 13F A10 NETWORKS COM 002121101 34,507 -23,651 -40.67 204 -46.60 0.0550
2016-02-11 2015-12-31 13F A10 NETWORKS COM 002121101 58,158 27,705 90.98 382 109.89 0.1636
2015-11-16 2015-09-30 13F A10 NETWORKS COM 002121101 30,453 30,453 182 0.0991
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.