BlackRock (BLK) Stock Concentration Calculator
Calculator · free · no signup · BLKQuantify BlackRock 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 BlackRock
BlackRock (BLK) is a public Fintech company, incorporated in Delaware and headquartered in New York, NY.
Equity grants at BlackRock typically include restricted stock units (RSUs).
BlackRock, Inc. is an American multinational investment company. Founded in 1988, initially as an enterprise risk management and fixed income institutional asset manager, BlackRock is by far the world's largest asset manager, with $15.3 trillion in assets under management as of 2026. Headquartered in New York City, BlackRock has 70 offices in 30 countries and clients in 100 countries.
Source: Wikipedia (CC BY-SA 4.0)
Larry Fink and seven partners founded the firm in 1988 inside Blackstone, separated in 1994, and grew it into the largest asset manager anywhere, with assets measured in the trillions. The 2009 purchase of Barclays Global Investors brought iShares, making it the leader in exchange-traded funds. Aladdin, its risk and portfolio management platform, is licensed to other institutions and gives the firm an unusual second business. Index scale has made it a focus of political debate over corporate governance influence. Headquarters are in New York City.
Sources: blackrock.com · en.wikipedia.org
Equity comp at BlackRock
- 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 BlackRock.
If a meaningful share of your net worth sits in BLK, 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 BLK's option-implied volatility.
All BlackRock tools → · Use the generic Stock Concentration Calculator for any company. Diversifying multiple RSU lots? See the lot-by-lot sell order →
BlackRock equity questions
- How much BLK 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 BLK position and weighs selling down (which triggers capital-gains tax now) against hedging (which costs option premium).
- Does BlackRock grant ISOs, NSOs, or RSUs?
- Equity compensation at BlackRock typically takes the form of restricted stock units (RSUs). Restricted stock units are taxed as ordinary income when they vest.
- Do BlackRock RSUs use double-trigger vesting?
- No. BlackRock 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.
Find another companyFintech peers
One piece of the puzzle.
OptionsAhoy plans your BlackRock equity alongside hedging, vesting, and de-concentration, across bullish, neutral, and bearish market scenarios. Free during beta.