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Xilinx Employees: Handling Single-Stock Concentration with a Section 351 Strategy

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'Xilinx employees with concentrated stock positions should understand that strategies like a Section 351 exchange can offer flexibility in managing large unrealized gains while preserving long-term planning options.' – Tyson Mavar, a representative of The Retirement Group, a division of Wealth Enhancement.

'Xilinx employees facing concentrated stock exposure may find that a Section 351 exchange provides an effective way to mitigate risk and maintain control over the timing of potential tax liabilities.' – Wesley Boudreaux, a representative of The Retirement Group, a division of Wealth Enhancement.

In this article, we will discuss:

  1. When a Section 351 exchange can help diversify concentrated stock positions without an immediate tax bill.

  2. The core eligibility rules (80% control test) and basis/step-up mechanics that drive tax deferral.

  3. Sample case studies (James & Sarah) illustrating the numbers and outcomes.

The Strategic Potential of Section 351: An Analysis of a Multi-Stock Case in Tax-Deferred Reorganization

A sizable amount of the wealth of many high-earning professionals at Xilinx may be invested in a small number of highly valued equities, including company shares accumulated through restricted stock units (RSUs), the employee stock purchase plan (ESPP), or equity awards earned due to long tenure. While rebalancing may seem out of reach due to the tax ramifications of selling these positions, investors can make tax-deferred contributions of appreciated assets to a new business entity through a Section 351 exchange. When an investor wants to manage several sizable, embedded gains at once, this tactic may be especially useful.

Think about James, a client with a $10 million portfolio. The value of one stock investment, which he purchased for $50,000, has increased to $1 million, or 10% of his total portfolio. At a long-term capital gains rate that can reach 23.8% for certain high-income taxpayers (20% maximum long-term capital gains rate plus the 3.8% Net Investment Income Tax), selling this position would result in a $950,000 capital gain and an estimated $226,100 tax bill. The amount available for reinvestment would be reduced by this tax.

Section 351(a) of the Internal Revenue Code provides: “If property is transferred to a corporation by one or more persons solely in exchange for stock in such corporation and immediately after the exchange such person or persons are in control (as defined in section 368(c)) of the corporation, no gain or loss shall be recognized.” Under Section 368(c), “control” generally means ownership of at least 80% of the voting power and 80% of each class of non-voting shares.

The transferor or transferors must own at least 80% of the new corporation’s stock right after the exchange to qualify for this treatment. This can be done for investors with sizable portfolios by joining a larger seeding group or acting as the principal seeder of a new entity.

In a Section 351 transaction, any built-in gains are preserved because the shareholder’s basis in the received stock typically carries over from the contributed property. If the shares are held until death, a step-up in basis under Section 1014 may eliminate the deferred gain.

Another client example involves Sarah, who has a $13 million portfolio. She owns two appreciated stocks:

  • Stock A: Originally $300,000, now worth $3 million.

  • Stock B: Initial cost basis $500,000, now worth $3 million.

At a long-term capital gains rate that can reach 23.8% for certain high-income taxpayers, the aggregate unrealized gain of $5.2 million would translate into an estimated tax of roughly $1,237,600 if sold today, which can constrain portfolio adjustments.

For employees of Xilinx holding concentrated positions, taking part in a Section 351 exchange can reduce concentration risk and defer recognition of these gains without an immediate tax bill. If assets receive a step-up in basis at death, the deferred gain may be fully eliminated under current law, and deferral can provide flexibility in managing future tax obligations.

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Sources:

1.  Internal Revenue Service.  Revenue Ruling 2003-51 . Internal Revenue Bulletin 2003-21, 2003. PDF.

2.  Friedel, David B., and Yaw O. Awuah. “ Sec. 351 Control Requirement: Opportunities and Pitfalls .”  The Tax Adviser , 1 July 2014. Web.

3.  Internal Revenue Service. “ Net Investment Income Tax (NIIT) .”  IRS.gov , last reviewed 1 July 2025. Web.

4.  Internal Revenue Service.  Publication 551: Basis of Assets . December 2024 revision, posted 18 February 2025. PDF.

5.  FINRA Investor Education Foundation (FINRA). “ Concentrate on Concentration Risk .”  FINRA.org , 15 June 2022. Web.

What is the 401(k) plan offered by Xilinx?

The 401(k) plan offered by Xilinx is a retirement savings plan that allows employees to save a portion of their paycheck before taxes are taken out.

Does Xilinx match contributions to the 401(k) plan?

Yes, Xilinx offers a matching contribution to the 401(k) plan, which helps employees boost their retirement savings.

What is the maximum contribution limit for Xilinx's 401(k) plan?

The maximum contribution limit for Xilinx's 401(k) plan is subject to IRS regulations, which can change annually. Employees should check the latest guidelines for the specific limit.

Can employees at Xilinx choose how their 401(k) funds are invested?

Yes, employees at Xilinx can choose from a variety of investment options within the 401(k) plan to align with their financial goals.

When can Xilinx employees start contributing to the 401(k) plan?

Xilinx employees can typically start contributing to the 401(k) plan after completing a specified period of employment, often within the first few months.

What types of contributions can Xilinx employees make to their 401(k) plan?

Employees at Xilinx can make pre-tax contributions, Roth (after-tax) contributions, and potentially catch-up contributions if they are age 50 or older.

Is there a vesting schedule for the employer match in Xilinx's 401(k) plan?

Yes, Xilinx has a vesting schedule for the employer match, which means employees must work for a certain period before they fully own the matched funds.

How can Xilinx employees access their 401(k) account information?

Xilinx employees can access their 401(k) account information through the plan's online portal or by contacting the plan administrator.

What happens to my 401(k) account if I leave Xilinx?

If you leave Xilinx, you have several options for your 401(k) account, including rolling it over to another retirement account, cashing it out, or leaving it in the Xilinx plan if eligible.

Are there any fees associated with Xilinx's 401(k) plan?

Yes, there may be administrative fees associated with Xilinx's 401(k) plan, which are disclosed in the plan documents provided to employees.

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For more information you can reach the plan administrator for Xilinx at 2100 Logic Dr. San Jose, CA 95124; or by calling them at 408-559-7778.

*Please see disclaimer for more information

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