Sempra (SRE) Stock Concentration Calculator
Calculator · free · no signup · SREQuantify Sempra 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 Sempra
Sempra (SRE) is a public Utility company, incorporated in California and headquartered in San Diego, CA.
Last close: $87.18 per share (as of 2026-08-19).
Equity grants at Sempra typically include restricted stock units (RSUs).
Sempra is a North American public utility holding company based in San Diego, California. The company is one of the largest utility holding companies in the United States, with nearly 40 million consumers. Sempra's focus is on electric and natural gas infrastructure. Its operating companies include Southern California Gas Company (SoCalGas) and San Diego Gas & Electric (SDGE) in Southern California; Oncor Electric Equipment Delivery Company in Texas; and Sempra Infrastructure, with offices in California and Texas.
Source: Wikipedia (CC BY-SA 4.0)
The 1998 merger of Pacific Enterprises and Enova created the company, which owns San Diego Gas and Electric, SoCalGas, and a large regulated utility in Texas. Regulated utilities earn an authorized return on capital invested, so rate-base growth rather than sales volume drives earnings. Infrastructure for liquefied natural gas export adds a business with different, contract-driven economics. California wildfire liability is the risk that distinguishes the utility from peers elsewhere. Headquarters are in San Diego.
Sources: sec.gov · en.wikipedia.org
OptionsAhoy is an independent tool and is not affiliated with, endorsed by, or sponsored by Sempra.
If a meaningful share of your net worth sits in SRE, 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 SRE's option-implied volatility.
Example: 5,000 SRE shares at $87.18 is a $435,900 position. A 30% drawdown costs $130,770; a 50% drawdown costs $217,950; a 70% drawdown costs $305,130. The calculator quantifies the trade-off between selling down (immediate capital-gains tax) and hedging (option premium drag) using SRE's option-implied volatility and your cost basis.
All Sempra tools → · Use the generic Stock Concentration Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →
Sempra equity questions
- How much SRE 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 SRE position and weighs selling down (which triggers capital-gains tax now) against hedging (which costs option premium).
- Does Sempra grant ISOs, NSOs, or RSUs?
- Equity compensation at Sempra typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
One piece of the puzzle.
OptionsAhoy plans your Sempra equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.