when did arista stock split? Timeline & dates

Arista Networks stock split history

This article answers the question "when did arista stock split" in full detail and provides a complete, verifiable timeline, the corporate rationale, implementation mechanics, tax and shareholder effects, observed market reactions, and the cumulative impact on share counts and historical pricing. If you want a clear chronology of Arista Networks' stock-split events and what they meant for shareholders, this guide gives actionable clarity and points to primary sources for verification.

As a quick answer to the query "when did arista stock split": Arista Networks carried out two notable forward 4-for-1 stock splits — the first with an effective/trading date of November 18, 2021, and the second effected via corporate amendment with trading on a split-adjusted basis beginning December 4, 2024. The 2024 action was announced in early November 2024 and effected in early December 2024. Both splits were forward splits that increased share count while proportionally reducing per-share price.

Company background

Arista Networks, Inc. (NYSE: ANET) is a U.S.-based company focused on cloud and data-center networking hardware and software. Its product portfolio centers on high-performance switches, routing solutions, and network operating software for large-scale data centers, cloud providers, and enterprise customers.

For investors and market watchers, a company's stock-split history is relevant because splits change the share count and per-share price presentation without altering an investor's proportional ownership or the company's market capitalization. Knowing "when did arista stock split" helps analysts reconstruct historical per-share performance, adjust charts and metrics consistently, and understand communications from the company to shareholders.

Chronological list of stock splits

Below is a concise list of Arista Networks' forward stock splits, with dates and ratios.

• November 18, 2021 — 4-for-1 forward stock split (effective/trading date: Nov 18, 2021).
• December 4, 2024 — 4-for-1 forward stock split (trading on a split-adjusted basis began Dec 4, 2024; corporate amendment effective Dec 3, 2024; announced early Nov 2024).

Each entry above answers the search intent behind "when did arista stock split" and supplies the effective/trading dates that matter to holders and market-data providers.

4-for-1 stock split — November 18, 2021

Arista executed a forward 4-for-1 stock split with an effective/trading date of November 18, 2021. Mechanically, each pre-split share became four post-split shares, and the per-share price was divided by four in market quotations, leaving total market value unchanged for each shareholder.

As of November 18, 2021, according to Arista Networks' investor communications and market-data records, the split was processed through standard transfer-agent and broker procedures so that holders of record received the appropriate additional shares.

The 2021 split is often referenced when people ask "when did arista stock split" because it was the company’s first significant forward split in recent years and set the stage for later corporate actions.

4-for-1 stock split — December 4, 2024

Arista announced a second 4-for-1 forward split in early November 2024 and implemented it through an amendment to the certificate of incorporation that became effective on December 3, 2024. Trading on a split-adjusted basis began on December 4, 2024. For each share held before the split effective time, shareholders received three additional shares — the standard result of a 4-for-1 split.

As of December 4, 2024, according to Arista Networks' press release and investor FAQ issued in November 2024, the amendment to Arista's certificate of incorporation was effective Dec 3, 2024 and the market reflected the split beginning Dec 4, 2024. The company provided an FAQ clarifying broker vs. registered-holder processing, timing, and tax treatment.

This 2024 action answers the recent framing of the query "when did arista stock split" for users seeking the most recent split details.

Announcement and corporate rationale

When asking "when did arista stock split", it is useful to also understand how and why the company announced each split.

• The 2021 split was announced in company filings and investor communications prior to the effective date; it was presented as a standard forward split to increase share accessibility for a broader range of investors.
• The 2024 split was announced via a corporate press release and an investor FAQ in early November 2024. The Board approved an amendment to the certificate of incorporation to effect the split, which became effective Dec 3, 2024, with split-adjusted trading beginning Dec 4, 2024.

Arista publicly stated that the Board's rationale centered on making the stock more accessible to a wider group of investors by reducing the per-share trading price, a common reason cited by many companies considering forward splits. Arista did not characterize the split as changing underlying business fundamentals; rather, the split was described as a capital-structure adjustment to facilitate broader participation in the market for ANET shares.

Per Arista disclosures, shareholder approval was not required for the 2024 amendment because the Board acted under authority contained in the company’s charter provisions — a point clarified in investor materials and the November 2024 FAQ.

Mechanics and implementation

Explaining how the split was implemented clarifies the operational steps behind the question "when did arista stock split" and what holders experienced:

• Corporate action: The 2024 split was effected by an amendment to the company’s certificate of incorporation. That amendment became effective at a specified time on Dec 3, 2024, as disclosed in Arista’s investor materials.

• Recordkeeping and allocation: For both the 2021 and 2024 splits, the transfer agent and brokers adjusted share balances so that registered shareholders and broker-held shareholders received the additional shares automatically. Broker processing times can vary; the company’s FAQ guided holders on what to expect.

• Trading adjustment: Markets began quoting ANET on a split-adjusted basis at market open the day after the corporate amendment took effect (Dec 4, 2024 for the most recent split). That means historical prices are shown on split-adjusted charts after the adjustment.

• Direct Registration System (DRS) and registered holders: Arista’s November 2024 communications noted how DRS statements and registered-holder accounts would reflect the additional shares, and how holders who hold shares directly with the transfer agent could see updated balances.

• Broker vs. registered-holder timing: The company’s materials explained that some brokerage account statements might take a day or more to reflect the updated share count and that the economic position (percentage ownership and voting rights) did not change.

These mechanics are standard for forward splits and are the operational background to the dates that answer "when did arista stock split".

Tax and shareholder effects

When people query "when did arista stock split", they often also want to know whether the split had tax consequences.

• U.S. federal tax treatment: Arista’s investor FAQ and press materials indicated that the forward splits were intended to be tax-free recapitalizations for U.S. federal income tax purposes, meaning no immediate taxable event solely because of the split. Shareholders should consult tax advisors for personal situations.

• Ownership and voting: A forward split does not change an investor’s percentage ownership or aggregate voting power in the company. If you owned 0.1% of Arista before the split, you still owned 0.1% after the split, albeit represented by more shares at a proportionally lower per-share price.

• Basis allocation: Shareholders typically allocate their cost basis across the new total shares. Arista’s FAQ reminded holders to consult tax professionals and brokerage statements to determine post-split basis per share.

These points clarify the practical effects for holders who ask "when did arista stock split" and what changed (or did not change) for their holdings.

Market reaction and trading impact

A common part of the interest behind "when did arista stock split" is how the market reacted and whether trading patterns changed.

• Typical split effects: Historically, forward splits can improve retail accessibility by lowering the per-share price, sometimes increasing trading volume and retail interest. Splits often produce short-term volatility but do not alter company fundamentals.

• Arista-specific observations: Around the November 2021 and early December 2024 split events, market-data providers recorded adjustments in price history and short-term volume changes as investors and algorithmic services updated positions and charts. Exact price and volume movements are documented in market data records for the days surrounding each split.

• Important caveat: A split alone does not create business value. Any sustained price movement after a split reflects market assessments of the company’s business and fundamentals, not the mechanical split itself.

When evaluating reactions tied to the dates that answer "when did arista stock split", consult price and volume records from market-data providers or brokerage research tools for the specific trading days noted above.

Cumulative effect and share count history

A key technical answer to "when did arista stock split" is how multiple forward splits compound over time.

• Cumulative factor: Arista’s two 4-for-1 splits (2021 and 2024) produce a cumulative multiplicative factor of 4 × 4 = 16. That is, one pre-2021 share becomes 16 post-December 4, 2024 shares.

• Example: If an investor held one share before the November 18, 2021 split, they held four shares after that split. After the December 4, 2024 split, those four shares became sixteen total.

• Historical adjustments: When calculating historical per-share returns or constructing long-term price charts, market-data services and analysts adjust historical prices and share counts to reflect the cumulative 16:1 effect across the two splits. This adjustment is essential to answer questions like "when did arista stock split" in the context of charting and performance analysis.

Practical checklist for shareholders around split dates

If you are tracking "when did arista stock split" to manage holdings or records, use the checklist below around split events:

• Verify the effective and trading dates in the company’s press release and investor FAQ (Arista’s November 2024 materials for the most recent split).
• Check your broker account and DRS statements for updated share counts after the effective date; allow for processing time.
• Confirm cost-basis allocation with your broker or tax advisor after the split.
• Update any personal spreadsheets, position-size calculations, or back-tested models to reflect the cumulative 16:1 adjustment from the two 4:1 splits.
• For real-time trading or orders, remember that market quotes will be split-adjusted beginning on the market open of the trading date (Dec 4, 2024 for the recent split).

This practical guidance helps shareholders use the dates behind the question "when did arista stock split" to keep records accurate.

See also

• Stock split (general mechanics and types)
• How stock splits affect historical price charts
• Arista Networks investor relations and corporate governance materials
• List of notable stock splits in technology sector

References and primary sources

The timeline and mechanics in this article draw from Arista Networks’ official communications and multiple market-data records. For verification and timestamped reporting, see the following primary sources and recordings (reporting dates are included):

• As of November 7, 2024, according to Arista Networks press release and investor FAQ: company announcement of the Board-approved 4-for-1 split, corporate amendment effective Dec 3, 2024, and trading on split-adjusted basis beginning Dec 4, 2024. (Source: Arista Networks investor relations press materials — November 2024.)

• As of December 4, 2024, according to Arista Networks investor FAQ and transfer-agent notices: details about broker processing, DRS statements, and tax treatment for the December 2024 split. (Source: Arista Networks investor FAQ — Nov/Dec 2024.)

• As of November 18, 2021, according to company filings and market-data records: Arista’s 4-for-1 forward split with trading effective Nov 18, 2021. (Source: Arista Networks investor communications and market split-history records — Nov 2021.)

• Market-data and split-history confirmations (used for chronological verification): historical split listings and adjusted charts recorded by recognized market-data providers and split-history aggregators (records note the Nov 18, 2021 and Dec 4, 2024 split-adjusted trading dates). (Sources: market split-history databases and financial-data services — entries for 2021 and 2024.)

All dates and mechanics above reflect the company’s official wording and transfer-agent procedures as disclosed in Arista’s press releases and investor materials for each split event.

Notes on verification and data handling

• If you need to reconcile historical charts or back-tested data, make sure your data provider applies the cumulative 16:1 factor for pre-2021 prices.
• For tax-specific questions about how a split affects your basis or reporting, rely on the transfer agent’s statement and consult a tax professional; Arista’s FAQ indicated the splits were intended to be tax-free recapitalizations for U.S. federal income tax purposes but individual circumstances vary.

How this article answers "when did arista stock split" and next steps

This guide supplied explicit dates and mechanics to answer the question "when did arista stock split": November 18, 2021 (4-for-1) and trading on a split-adjusted basis beginning December 4, 2024 (4-for-1), with the 2024 corporate amendment effective Dec 3, 2024. It also explained the cumulative 16:1 impact, implementation mechanics, tax considerations, and where to verify the events.

If you want to track Arista shares or monitor announcements and market data in real time, consider using Bitget’s market tools for watchlists and price alerts. For secure custody of digital assets and tokens related to your broader portfolio, the Bitget Wallet provides on-chain management and integration with Bitget services.

Explore more investor materials on Arista’s investor relations page and review transfer-agent statements if you hold registered shares. For trading activity and up-to-date market quotes, use your brokerage tools and the market-data features available on Bitget.

Further questions about the chronology or how the cumulative split affects historical analytics? Ask for a downloadable example that shows how to adjust historical price series for the 16:1 cumulative factor.