Mark Alarie Net Worth: Estimate, Sources, and Career Timeline

Mark S. Alarie's net worth is estimated at a minimum of $77,966 as of March 23, 2026, based on his publicly disclosed insider holdings in Castellum, Inc. (ticker: CTM). That number is a floor, not a ceiling. It counts only the Castellum shares he has reported via SEC Form 4 filings, and says nothing about his private-equity stakes, angel investments, real estate, or the decades of income he earned before joining the board. The real figure is almost certainly higher, but by how much is genuinely hard to verify from public records alone.

First, a quick identity check: which Mark Alarie are we talking about?

There are at least two notable people whose names are close enough to create real confusion. Mark Steven Alarie (born December 11, 1963) is a former NBA player who suited up for the Denver Nuggets and Washington Bullets. He is a separate person entirely. The Mark Alarie covered here is Mark S. Alarie, an angel investor and independent board director at Castellum, Inc., based in the Bethesda, Maryland area. His LinkedIn profile, Castellum's investor-relations page, and SEC proxy filings all corroborate the same career narrative: investment banking, private-equity fund work, a stint running a company, and now early-stage tech investing plus board service. If you landed here looking for the basketball player, that is a different financial story. Interestingly, Castellum's IR biography does note that Mark S. Alarie also played for the Denver Nuggets and Washington Bullets and holds an MBA from Wharton, which means the two names may actually refer to the same person with a very different second act in finance.

Given that overlap, the most accurate framing is this: the Mark Alarie tracked by SEC insider-trading databases and Castellum's board filings is the same person as the former NBA player, now reinvented as a finance professional. That dual background matters for the net-worth story, because it means his wealth trajectory spans a professional sports salary era, an MBA, decades in investment banking and private equity, and a current board role at a small-cap defense-tech company.

The net worth estimate to use right now

The most current public estimate comes from GuruFocus, which pegged his net worth at 'at least $77,966' as of March 23, 2026. An earlier GuruFocus snapshot from November 9, 2025 showed 'at least $135,504.' The difference reflects Castellum's share price moving between those two dates, not a change in how many shares he holds. Benzinga also tracks his insider trades but displays a similarly small or placeholder figure, again derived purely from reported Castellum equity.

Think of those numbers as the verifiable floor, the public minimum that regulators can see. His actual net worth, accounting for private investments, earlier career earnings, and assets outside SEC reporting requirements, is almost certainly in the low-to-mid seven figures at minimum, though that range is an informed estimate rather than a confirmed fact. A Wharton MBA, two decades in investment banking at Legg Mason and Alex Brown, a fund co-founding role, and years of angel investing do not typically add up to a sub-$100,000 net worth.

How Mark Alarie makes money: the income sources

His income history breaks into four distinct phases, each with different earning potential.

Professional basketball (mid-1980s to early 1990s)

NBA salaries in the mid-to-late 1980s were modest by today's standards, typically in the low-to-mid six figures for non-star players. Alarie was a role player for the Nuggets and Bullets, so his basketball earnings likely funded his post-playing education rather than building lasting wealth on their own. Still, it was a foundation.

Investment banking at Legg Mason and Alex Brown

After his NBA career, Alarie went back to school at Wharton and then moved into investment banking. Working at Legg Mason and Alex Brown, two well-established firms, he would have earned competitive Wall Street compensation including base salary, bonuses, and potentially carried interest or fund stakes depending on his role level. These years are the most likely source of any serious wealth accumulation.

Private equity and fund roles: CameronBlue Capital and CrossHill Financial Group

He co-founded CameronBlue Capital and served as a principal at CrossHill Financial Group. Fund co-founders typically earn management fees (usually around 2% of assets under management) plus carried interest (often 20% of profits above a hurdle rate). The exact assets under management for these funds are not in public filings, so hard dollar figures are not available, but the structure alone explains how a career in private equity can build wealth well beyond what a salary history would suggest.

iCertainty presidency (2008 to 2012)

He served as President of iCertainty, Inc. for four years. Executive-level compensation at a private technology company in that period would typically include a salary, equity, and possibly performance bonuses. Without SEC filings for iCertainty (a private company), the exact compensation is not public.

Angel investing and Castellum board role (2022 to present)

Since October 12, 2022, Alarie has served as an independent director at Castellum, Inc. and chairs the Compensation, Culture, and People Committee. Castellum's proxy statement shows non-employee directors receive cash compensation and equity grants, with the committee chair service earning a pro-rata portion of $10,000. Beyond Castellum, he is actively deploying capital as an angel investor in early-stage U.S. technology companies. Angel returns are lumpy and illiquid, but a single successful exit can dwarf years of board fees.

Breaking down the wealth: assets, equity, and spending factors

• Castellum, Inc. equity: The publicly visible piece. SEC Form 4 filings show his beneficial ownership stake in CTM stock, valued at the current share price. This is small in absolute terms given Castellum's market cap, but it is the only asset that third-party sites can quantify.
• Private investment portfolio: As a self-described angel investor focused on early-stage tech, he likely holds stakes in multiple private companies. These are not reported unless a company goes public or files with the SEC. This could be the largest component of his net worth.
• Former fund stakes: Co-founding CameronBlue Capital and working at CrossHill Financial Group suggests he may retain carried-interest rights or residual ownership in those vehicles.
• Real estate: His Bethesda, Maryland base is one of the higher-cost real estate markets in the Mid-Atlantic region. No public records have been cross-referenced here, but home ownership in that area alone can represent $1M or more in asset value.
• Liquid savings and retirement accounts: Not publicly disclosed, but standard for someone with his career arc.
• Spending context: Board directors at small-cap companies are not living on board fees alone. His lifestyle spending is most likely funded by investment returns and prior accumulated capital, not current cash compensation.

How the estimate is built: data sources and methodology

The $77,966 floor figure from GuruFocus follows a straightforward but limited process. GuruFocus pulls Mark S. Alarie's Form 4 filings from SEC EDGAR, which report every open-market purchase or sale of Castellum stock by an insider. It then multiplies the final reported share count by the current or most recent closing price. The site explicitly disclaims that this 'may not reflect actual net worth' and notes that it assumes no transactions have occurred after the last reported Form 4 date (which it pegged at March 21, 2023, in one snapshot). That is an important caveat: if he acquired more shares after that date through vesting or purchases, those would not be captured until a new Form 4 was filed and indexed.

Benzinga uses a similar approach, also pulling from SEC insider-trade data and recalculating periodically. Their timestamp of September 9, 2024 shows the estimate was recalculated at that point. Neither site accounts for private assets, and both are explicit that their figures are equity-only estimates.

For the broader informed range on this site, the methodology adds career-income context: investment banking compensation benchmarks for his seniority level and era, typical private-equity fund economics for co-founders, and regional real estate values. None of that is a hard figure, but it provides a more realistic picture than the SEC-only floor.

Net worth over time: how his financial trajectory evolved

1. Mid-1980s to early 1990s (NBA career): Six-figure annual earnings from professional basketball; likely limited savings given the salary scale of the era, but enough to fund graduate school.
2. Early-to-mid 1990s (Wharton MBA): Investment in human capital rather than financial accumulation; transitional phase.
3. Mid-1990s to mid-2000s (Legg Mason, Alex Brown, early fund work): Peak salary-and-bonus earning years; the most probable period of significant wealth accumulation through Wall Street compensation.
4. Mid-2000s to 2012 (CameronBlue Capital co-founding, CrossHill, iCertainty presidency): Shift from employee to principal/entrepreneur; income becomes more variable but upside potential increases significantly through fund economics and equity ownership.
5. 2012 to 2022 (angel investing, self-employed): Deploying and growing private capital; no salary in a traditional sense, but investment returns from successful early-stage bets could be substantial.
6. October 2022 to present (Castellum board): Modest cash fees and equity grants from board service; primary financial activity remains angel investing. SEC-visible net worth is a fraction of likely total.

The GuruFocus snapshots illustrate a micro version of this trajectory: his Castellum-only estimated net worth dropped from $135,504 in November 2025 to $77,966 by March 2026, purely because Castellum's share price moved. That volatility is a reminder that small-cap equity stakes can swing dramatically without any change in a person's underlying financial position.

Handling conflicting numbers and verifying the estimate yourself

If you search around, you will find different sites posting different numbers for Mark S. Alarie's net worth. Almost all of them trace back to the same SEC Form 4 data and differ only because they are using different stock price snapshots or different Form 4 transaction dates as their baseline. Here is how to cut through the noise. If you are looking at how similar board and investment careers translate into numbers, you may also want to compare this with mark s allen net worth as a related net-worth profile.

• Go to SEC EDGAR (sec.gov) and search for 'Mark Alarie' as a reporting person. Pull the most recent Form 4 filings for Castellum, Inc. to see his current reported share count.
• Check Castellum's current stock price (ticker: CTM) and multiply by his reported shares. That gives you the same equity-only floor the aggregator sites compute.
• Read Castellum's most recent proxy statement (DEF 14A) for the director compensation table, which shows exactly what cash fees and equity grants he received in the most recent fiscal year.
• Treat any celebrity net-worth site number as a starting point for research, not a final answer. Sites that do not cite SEC filings or disclosed compensation are guessing.
• For the bigger picture, look at analogous career profiles: investment bankers with Wharton MBAs who co-founded private-equity funds typically accumulate $2M–$10M over a 20-to-30-year career, depending on fund size and exit success. Use that as a sanity check on any extreme estimate in either direction.
• Recognize that private angel investments are inherently unverifiable until a liquidity event. If one of his portfolio companies exits via IPO or acquisition, that event will appear in public records and could change the picture significantly.

One practical tip: if you see a number above $5M for Alarie specifically and it does not cite a specific angel investment exit or private-equity fund liquidation event, be skeptical. Conversely, any site showing only the Castellum equity floor as his 'total' net worth is almost certainly undercounting by a wide margin.

Mark S. Alarie is a genuinely interesting financial profile because he sits at the intersection of three worlds: professional sports, Wall Street, and Silicon-Valley-style angel investing. That career arc is unusual, and it means his wealth story is more complex than what SEC filings can capture. If you are researching other notable Marks in finance and investing, profiles like Mark Albenze or Mark Alcala offer useful comparison points for how board-level compensation and private-equity backgrounds translate into net worth estimates built from similar public-record methodologies. You can see a similar pattern in how the mark albenze net worth profile is pieced together from public records and the timing of reported transactions. If you are also comparing peer estimates, check how Mark Alcala net worth is built from public and reported sources. To understand the real drivers behind Mark Alhermizi net worth, it helps to separate verified SEC-reported holdings from private investments and career earnings that are harder to quantify.