Genuine Parts (GPC) Stock Concentration Calculator
Calculator · free · no signup · GPCQuantify Genuine Parts concentration risk. Drawdown impact at 30 / 50 / 70%, with the tax-aware trade-off between selling down and hedging.
Beta · invite-only · AlphaLatitude Inc. · Free Tools
Your inputs
Adjust — results update instantly.Position & portfolio
Tax
Most fee-only advisors target ≤10% in any single name. You're at 67%.
Estimates only. Not financial advice.
Most sensitive to: Expected market return (±10% on this input swings best-plan wealth by ±$190,508).
Cost of fully de-concentrating
All three plans sell to 0% (no hedge).Sensitivity. If your expected position return drops below 19.6%/yr, lump-sum (sell everything today) beats every spread plan above.
Have multiple RSU vest lots? The RSU Lot Order Calculator picks which lots to sell first, and on which dates, to divest at the lowest computed tax.
Build your own plan
Toggle below — chart updates live. Sell buttons show the slice.Tech / Software single names hit a 50%+ peak-to-trough drawdown in roughly 1 of every 5 rolling 3-year windows over 2014–2024. Even mega-caps aren’t exempt.
Tax brackets: 2026 · Estimates only — not financial advice.
Estate note. Heirs receive a stepped-up basis at death (§1014), eliminating built-in gain on inherited shares. Older holders who plan to bequeath rather than sell may rationally never de-concentrate.
You sized one position's risk. The beta integrates hedging, sell-down, and tax timing into one optimized plan.
Request beta access →Related calculators: Protect Your Stock Calculator · RSU Lot Order Calculator · Equity Funding Plan Calculator
About Genuine Parts
Genuine Parts (GPC) is a public Retail company, incorporated in Georgia and headquartered in Atlanta, GA.
Equity grants at Genuine Parts typically include restricted stock units (RSUs).
Genuine Parts Company (GPC) is an American automotive and industrial parts distributor based in Atlanta, Georgia. Established by brothers Carlyle and Malcolm Fraser in 1928, the company has approximately 60,000 employees. In addition to the United States, GPC has operated in Australasia, Belgium, Canada, France, Germany, Mexico, the Netherlands, Poland, and the United Kingdom. GPC's subsidiaries include industrial parts distributor Motion as well as NAPA Auto Parts, which primarily sells parts in North America.
Source: Wikipedia (CC BY-SA 4.0)
Founded in Atlanta in 1928, the company distributes automotive replacement parts under the NAPA brand and industrial components through Motion. NAPA operates a hybrid of company-owned and independently owned stores supplied by regional distribution centers, serving repair shops that need a part within the hour. That delivery speed, not price, is the competitive basis. Industrial distribution serves manufacturing maintenance customers. The company has raised its dividend for decades. Headquarters remain in Atlanta.
Sources: genpt.com · en.wikipedia.org
Equity comp at Genuine Parts
- RSUs use single-trigger vesting: shares become yours as each portion vests on schedule, and the value is taxed as ordinary income at that point. No IPO or acquisition is required.
Researched 2026-08-17.
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Genuine Parts.
If a meaningful share of your net worth sits in GPC, concentration risk is the question. This calculator quantifies drawdown impact at 30 / 50 / 70%, and the trade-off between selling down (tax cost now) versus hedging (option premium drag), auto-filled with GPC's option-implied volatility.
All Genuine Parts tools → · Use the generic Stock Concentration Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →
Genuine Parts equity questions
- How much GPC stock is too much?
- There is no single threshold, but the larger the share of your net worth in one stock, the more a single bad year can set back your plans. The calculator above quantifies the drawdown impact at 30, 50, and 70 percent for your GPC position and weighs selling down (which triggers capital-gains tax now) against hedging (which costs option premium).
- Does Genuine Parts grant ISOs, NSOs, or RSUs?
- Equity compensation at Genuine Parts typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
- Do Genuine Parts RSUs use double-trigger vesting?
- No. Genuine Parts restricted stock units (RSUs) use single-trigger vesting: each tranche becomes yours as it vests on schedule, taxed as ordinary income at that point, with no liquidity event required.
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