ATEN · A10 Networks

The thesis

A10 Networks' third-quarter 2026 results moved the case from unproven to supported: revenue rose 22.6% to $91.5 million and full-year growth guidance went to about 16% from 12%-14%. The shares closed at $27.79 on 10 November 2026, still 26.9% below the 52-week high of $38.03 and below the $30 level that marked the June breakout. The fourth-quarter report, expected around February 2027, settles whether the growth holds.

The story is well known: the AI-security story has been well known since June, and the 5 November 2026 report is the first fresh fundamental news since the 5 August 2026 report. The rating rises to medium from low because of that report. A10's Form 8-K shows third-quarter non-GAAP diluted earnings per share (EPS) of $0.31 against a $0.27 estimate, and sales of $91.55 million against an $83.88 million estimate, per company news headlines.

Bullish and bearish views on A10 Networks Inc

The bull case on A10 Networks Inc (ATEN), in brief: growth accelerated and beat estimates. The bear case: the June breakout is still unrecovered.

Bull case

• Growth accelerated and beat estimates. Third-quarter revenue was $91.5 million, up 22.6% from $74.7 million, per the 5 November 2026 Form 8-K. Second-quarter growth was 15.5%.
• Guidance went up. A10 raised full-year 2026 revenue growth guidance to about 16% from 12%-14%. It set non-GAAP EPS guidance at $1.08-$1.10, 20%-22% growth over 2025, against a prior 14%-16%.
• Products led the gain. Products revenue was $58.5 million against $43.1 million a year earlier. Services were $33.0 million against $31.6 million. Adjusted EBITDA (earnings before interest, taxes, depreciation and amortization, adjusted) was $29.5 million, 32.2% of revenue.
• Long-term targets are now public. The company set fiscal 2029 targets of $500 million annual revenue through organic growth and $2.00 annual non-GAAP EPS, an implied revenue compound growth rate of 14%, per the 5 November 2026 release.
• Cash and buybacks continue. Cash, equivalents and marketable securities were $360.4 million at 30 September 2026. A10 repurchased 879 thousand shares for $23.0 million in the quarter, at an average of $26.18, and declared a $0.06 quarterly dividend.

Bear case

• The June breakout is still unrecovered. The 10 November 2026 close of $27.79 is below the $30 breakout level and 26.9% below the 52-week high, per adjusted daily closes.
• The AI-security business has no disclosed revenue. Management said in the second-quarter release that the TrojAI acquisition, closed 15 June 2026, carries no material fiscal 2026 revenue. The third-quarter release gives no separate AI Gateway revenue figure.
• Reported profit trails adjusted profit. Third-quarter diluted EPS was $0.23 under generally accepted accounting principles (GAAP) against $0.31 on the non-GAAP measure.
• Product revenue is lumpy. The $58.5 million products quarter sets a high comparison for the fourth quarter. Second-quarter products revenue was $49.0 million.
• Analyst targets were cut before the report. Mizuho lowered its target to $30 from $34 on 15 October 2026 and kept a Neutral rating. A 5 November 2026 headline says Deutsche Bank adjusted its target on 6 November 2026; the new figure is not available. Deutsche Bank's prior target was $28, set at its 31 August 2026 initiation at Hold, per TipRanks.

Price setup

The adjusted close was $27.79 on 10 November 2026, per split- and dividend-adjusted daily closes. The close was $26.45 on 28 October 2026. The three-month price change is 3.2%, against −10.4% on 28 October 2026. The 14-day relative strength index (RSI, a 0-100 gauge of recent buying pressure) is 59.9, up from 43.0 on 28 October 2026.

The close sits above the $27.63 close of 2 October 2026, the high of the faded early-October rebound. The $30 breakout level from June is the nearest reference above. The 4 September 2026 close of $24.59, the low of the September rebound, is the nearest reference below.

Crowding evidence is limited. The earnings report is past, and the shares trade well below the prior high rather than at a wide gap above a rising moving average. Average daily volume is roughly 1.27 million shares, and single-session moves of 8% or more around earnings are normal for this name. The company's own buyback at an average of $26.18 in the third quarter is the only share-count activity in the release.

Catalysts ahead

• 16 November 2026: Record date for the $0.06 per share quarterly dividend. Confirms the company is keeping its payout alongside buybacks after the raised outlook; payment follows on 1 December 2026.
• 1 December 2026: Payment date for the $0.06 per share quarterly dividend. Completes the dividend the company declared with its third-quarter results.
• ~February 2027 (est.): Fourth-quarter and full-year 2026 results, date not yet announced. Shows whether the full-year revenue growth of about 16% was delivered and whether AI-security products start to contribute revenue.

What would change the view

A daily close below $24.59, the 4 September 2026 close and the low of the September rebound. A fourth quarter that misses the raised full-year revenue-growth outlook of about 16% would also break the case.

The risks this note tracks, each with what would confirm it:

• Product revenue is lumpy, and the strong third quarter makes the fourth-quarter comparison harder. Confirmed by: fourth-quarter products revenue falls clearly below the $58.5 million reported for the third quarter, with management citing deployment delays.
• The shares fail to recover the $30 level from the June breakout and the post-report gain fades. Confirmed by: a daily close below $24.59, the 4 September 2026 close.
• Reported profit trails adjusted profit, so the quality of earnings stays in question. Confirmed by: the gap between non-GAAP diluted EPS of $0.31 and GAAP diluted EPS of $0.23 widens at the next report.
• The AI-security products add no disclosed revenue, leaving the June repricing without support. Confirmed by: the fourth-quarter release again gives no separate revenue figure for the AI Gateway or the TrojAI acquisition.

What it trades with

A10 sells application-delivery and security software and hardware to service providers and enterprises. Its shares trade on the AI-security story that began in June as well as on its core product cycle, so they can move with Cybersecurity and networking names. No current theme data links the shares to a specific peer group, and no correlation figures were measured for this note.