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Ken Griffin's A10 Networks, Inc. (ATEN) position

Yes: as of Q1 2026, Ken Griffin holds 514K shares of ATEN worth $12M (0.0% of the disclosed portfolio). Last quarter the position was increased by 238.1%. First disclosed Q2 2021.
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Current value
$12M
Shares held
514K
% of portfolio
0.0%
Est. average buy price (i)
$18.37
Quarter-end price
$23.12

Estimated trade prices

Average price in quarters with purchases
$15.28
Average prices in quarters with sales
  • Q4 2025: $17.71 (199K shares sold)
  • Q2 2025: $17.09 (168K shares sold)
  • Q4 2024: $16.33 (220K shares sold)
  • Q3 2024: $13.49 (79K shares sold)
  • Q3 2023: $14.81 (29K shares sold)
  • Q2 2023: $14.47 (51K shares sold)
  • Q1 2023: $15.26 (109K shares sold)
  • Q4 2022: $17.13 (85K shares sold)
  • Q2 2022: $14.49 (205K shares sold)
  • Q3 2021: $12.97 (67K shares sold)

ATEN price vs Griffin's position

1Y 3Y 5Y MAX
Dates
$10$20$4020222023202420252026Sold 67K shares (47.8%) · Q3 2021. Average closing price $12.97 · Price range $10.70–$14.7667KsharessoldAdded 42K shares (18.4%) · Q1 2022. Average closing price $14.06 · Price range $12.55–$16.1342KsharespurchasedSold 205K shares (75.2%) · Q2 2022. Average closing price $14.49 · Price range $12.90–$16.78205KsharessoldAdded 216K shares (318.8%) · Q3 2022. Average closing price $14.23 · Price range $12.78–$16.44216KsharespurchasedSold 85K shares (29.8%) · Q4 2022. Average closing price $17.13 · Price range $13.75–$19.3085KsharessoldSold 109K shares (54.6%) · Q1 2023. Average closing price $15.26 · Price range $14.23–$16.86109KsharessoldSold 51K shares (56.6%) · Q2 2023. Average closing price $14.47 · Price range $13.75–$15.4351KsharessoldSold 29K shares (73.8%) · Q3 2023. Average closing price $14.81 · Price range $14.06–$15.8329KsharessoldNew position of 185K shares · Q1 2024. Average closing price $13.44 · Price range $12.65–$14.85185KsharespurchasedAdded 502K shares (271.2%) · Q2 2024. Average closing price $14.25 · Price range $12.80–$16.45502KsharespurchasedSold 79K shares (11.5%) · Q3 2024. Average closing price $13.49 · Price range $12.36–$14.4479KsharessoldSold 220K shares (36.1%) · Q4 2024. Average closing price $16.33 · Price range $14.15–$19.20220KsharessoldAdded 692 shares (0.2%) · Q1 2025. Average closing price $19.21 · Price range $16.34–$21.68692sharespurchasedSold 168K shares (43.3%) · Q2 2025. Average closing price $17.09 · Price range $14.89–$19.35168KsharessoldAdded 130K shares (59.0%) · Q3 2025. Average closing price $18.09 · Price range $16.99–$20.14130KsharespurchasedSold 199K shares (56.7%) · Q4 2025. Average closing price $17.71 · Price range $16.55–$18.67199KsharessoldAdded 362K shares (238.1%) · Q1 2026. Average closing price $19.56 · Price range $16.95–$23.26362Ksharespurchased← Earlier —1 purchase
Average closing price · filing quarter
$19.56
Price range · filing quarter
$16.95 – $23.26
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Every quarterly change

Quarter Action Shares change Est. value change Δ Own Shares held Filing date
Q1 2026 Added +362K +$7.1M +238.1% 514K May 15, 2026
Q4 2025 Reduced −199K −$3.5M −56.7% 152K Feb 17, 2026
Q3 2025 Added +130K +$2.4M +59.0% 351K Nov 14, 2025
Q2 2025 Reduced −168K −$2.9M −43.3% 221K Aug 14, 2025
Q1 2025 Added +692 +$13K +0.2% 389K May 15, 2025
Q4 2024 Reduced −220K −$3.6M −36.1% 388K Feb 14, 2025
Q3 2024 Reduced −79K −$1.1M −11.5% 608K Nov 14, 2024
Q2 2024 Added +502K +$7.2M +271.2% 687K Aug 14, 2024
Q1 2024 New +185K +$2.5M – 185K May 15, 2024
Q3 2023 Reduced −29K −$429K −73.8% 10K Nov 14, 2023
Q2 2023 Reduced −51K −$741K −56.6% 39K Aug 14, 2023
Q1 2023 Reduced −109K −$1.7M −54.6% 90K May 15, 2023
Q4 2022 Reduced −85K −$1.5M −29.8% 199K Feb 14, 2023
Q3 2022 Added +216K +$3.1M +318.8% 284K Nov 14, 2022
Q2 2022 Reduced −205K −$3.0M −75.2% 68K Aug 15, 2022
Q1 2022 Added +42K +$596K +18.4% 273K May 16, 2022
Q4 2021 First covered – – – 231K Feb 14, 2022
Q3 2021 Reduced −67K −$866K −47.8% 73K Nov 15, 2021
Q2 2021 New +140K +$1.4M – 140K Aug 16, 2021
Data through Q1 2026 · filed May 15, 2026
19 grouped rows from 19 quarters

More Griffin positions

NVIDIA Corporation(NVDA)
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Amazon.com, Inc.(AMZN)
$1.7B
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Micron Technology, Inc.(MU)
$1.6B
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Taiwan Semiconductor Manufacturing Company Limited(TSM)
$1.4B
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Apple Inc.(AAPL)
$1.3B
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Meta Platforms, Inc.(META)
$1.0B
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Common questions

Does Ken Griffin own ATEN?

Yes. As of Q1 2026, Ken Griffin disclosed 514K shares of ATEN, worth $12M. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

When did Ken Griffin buy ATEN?

Ken Griffin first disclosed a ATEN position in Q2 2021; every quarterly buy and sell since is in the table above. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

Did Ken Griffin sell ATEN?

The quarter-by-quarter table above shows each sale and reduction Ken Griffin disclosed in ATEN. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How many shares of ATEN does Ken Griffin own?

Ken Griffin disclosed 514K shares of ATEN as of Q1 2026. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

What price did Ken Griffin pay for ATEN?

Ken Griffin's estimated average buy price for ATEN is $18.37, from quarter-average prices weighted by the shares added each quarter. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.

How are the estimated trade prices calculated?

13F filings disclose quarter-end holdings, not trade dates or execution prices. These estimates use each covered quarter's average market price; the add average excludes the opening position and quarters without price data. All figures come from SEC 13F filings for Q1 2026, the latest disclosed quarter.