A10 Networks, Inc.
US ˙ NYSE ˙ US0021211018

SecurityATEN / A10 Networks, Inc.
InstitutionQUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series
Latest Disclosed Ownership127,858 shares
Latest Disclosed Value $ 2,474,052
QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series reports 5.10% increase in ownership of ATEN / A10 Networks, Inc.

On August 26, 2025 - QUANTITATIVE MASTER SERIES LLC - Master Small Cap Index Series filed a NPORT-P form disclosing ownership of 127,858 shares of A10 Networks, Inc. (US:ATEN) valued at $2,474,052 USD as of June 30, 2025. The entity filed a previous NPORT-P on May 28, 2025 disclosing 121,657 shares of A10 Networks, Inc.. This represents a change in shares of 5.10% during the quarter. The current value of the position is $3,908,619 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)
2025-08-26 2025-06-30 NP A10 Networks EC US0021211018 127,858 6,201 5.10 2,474 24.51 0.0556
2025-05-28 2025-03-31 NP A10 Networks EC US0021211018 121,657 2,126 1.78 1,988 -9.64 0.0477
2025-02-25 2024-12-31 NP A10 Networks EC US0021211018 119,531 -20,881 -14.87 2,199 8.49 0.0480
2024-11-26 2024-09-30 NP A10 Networks EC US0021211018 140,412 5,457 4.04 2,028 8.45 0.0383
2024-08-26 2024-06-30 NP A10 Networks EC US0021211018 134,955 9,918 7.93 1,869 9.23 0.0381
2024-05-28 2024-03-31 NP A10 Networks EC US0021211018 125,037 -3,915 -3.04 1,712 0.77 0.0357
2024-02-26 2023-12-31 NP A10 Networks EC US0021211018 128,952 8,739 7.27 1,698 -5.98 0.0362
2023-11-28 2023-09-30 NP A10 Networks EC US0021211018 120,213 9 0.01 1,807 3.02 0.0471
2023-08-25 2023-06-30 NP A10 Networks EC US0021211018 120,204 18,336 18.00 1,754 11.16 0.0416
2023-05-26 2023-03-31 NP A10 Networks EC US0021211018 101,868 3,238 3.28 1,578 -3.84 0.0420
2023-02-24 2022-12-31 NP A10 Networks EC US0021211018 98,630 -5,873 -5.62 1,640 18.33 0.0451
2022-11-25 2022-09-30 NP A10 Networks EC US0021211018 104,503 2,672 2.62 1,387 -5.33 0.0397
2022-08-25 2022-06-30 NP A10 Networks EC US0021211018 101,831 8,019 8.55 1,464 11.93 0.0404
2022-05-26 2022-03-31 NP A10 Networks EC US0021211018 93,812 3,853 4.28 1,309 -12.27 0.0305
2022-02-25 2021-12-31 NP A10 Networks EC US0021211018 89,959 0 0.00 1,492 23.02 0.0323
2021-11-24 2021-09-30 NP A10 Networks EC US0021211018 89,959 0 0.00 1,213 19.76 0.0267
2021-08-26 2021-06-30 NP A10 Networks EC US0021211018 89,959 0 0.00 1,013 17.13 0.0217
2021-05-27 2021-03-31 NP A10 Networks EC US0021211018 89,959 0 0.00 865 -2.48 0.0196
2021-02-25 2020-12-31 NP A10 Networks EC US0021211018 89,959 -14,862 -14.18 887 32.83 0.0227
2020-11-25 2020-09-30 NP A10 Networks EC US0021211018 104,821 0 0.00 668 -6.45 0.0214
2020-08-27 2020-06-30 NP A10 Networks EC US0021211018 104,821 19,399 22.71 714 34.53 0.0233
2020-06-01 2020-03-31 NP A10 Networks EC US0021211018 85,422 0 0.00 530 -9.56 0.0217
2020-02-27 2019-12-31 NP A10 Networks EC 002121101 85,422 -10,573 -11.01 587 -12.01 0.0176
2019-11-27 2019-09-30 NP A10 Networks EC US0021211018 95,995 95,995 666 0.0220
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.