Claire Trottier occupies an unusual space in Quebec’s public life: she was born into one of the province’s wealthiest families, yet she spends her time arguing that people like her should pay more tax. Between her scientific training, her outspoken advocacy, and her newest venture as a bookstore owner, Claire Trottier has built a reputation that goes well beyond her family name. This article covers what’s publicly known about her age, her family, her career shift from the lab to public advocacy, and what she’s doing today.
Who Is Claire Trottier?
Claire Trottier is a Montreal-based philanthropist, investor, and tax justice advocate, best known as the daughter of Lorne Trottier, co-founder of the technology company Matrox. She holds a PhD in microbiology and immunology from McGill University and worked as an assistant professor there until 2021. Rather than staying in academia or simply managing her family’s wealth, Claire Trottier redirected her energy toward public advocacy around inequality, migration, and democratic decline.
She’s perhaps most publicly recognized for co-signing an open letter with the Millionaires for Humanity group during the COVID-19 pandemic, one of only a handful of Canadian signatories calling on governments to tax wealthy individuals more heavily to fund the crisis response.
Claire Trottier Age and Early Life
According to a November 2025 profile in La Presse, Claire Trottier was born in 1980, making her 45 years old at the time of that interview and around 46 today. The Claire Trottier age detail matters because it places her scientific career, her years as a McGill professor, and her more recent advocacy work into a coherent timeline spanning roughly two decades.
She grew up in a family that, despite significant wealth from Matrox’s success, kept a notably low profile. Her father has been described as famously frugal, once mentioning he considered celebrating a billion-dollar business sale with a meal at a casual restaurant chain rather than anything extravagant.
Education and Scientific Career
Claire Trottier’s academic path led her toward hard science rather than business, following her father’s own fascination with microbiology despite his engineering background. She completed her PhD in microbiology and immunology at McGill University, then joined the faculty as an assistant professor in the same department.
She remained in that academic role until 2021, when she shifted her focus toward philanthropy and advocacy work. That transition reflects a broader pattern in her life: using the flexibility that comes with family wealth to pursue causes rather than simply expanding a career or fortune.
From Microbiology to Wealth Tax Advocacy
Claire Trottier now serves as president of Patriotic Millionaires Canada, a group that argues wealthy individuals and corporations should shoulder a larger share of the tax burden. She’s testified before Canada’s House of Commons Finance Committee, describing herself candidly as someone who benefited from being born into privilege rather than earning it through personal achievement.
Her advocacy extends beyond tax policy. She co-founded the Collectif Bienvenue (Welcome Collective), an organization supporting migrants who have settled in Montreal, and she chairs the board of the Fondation Euphrosine, which focuses on interconnected challenges around inequality and democratic erosion.
Key Roles and Affiliations
| Organization | Claire Trottier’s Role |
|---|---|
| Patriotic Millionaires Canada | President |
| Trottier Family Foundation | Board member |
| Collectif Bienvenue (Welcome Collective) | Co-founder |
| Fondation Euphrosine | Board chair |
| McGill University Health Centre Foundation | Board member |
| Eclipx Family Office | Board member |
Claire Trottier Family: Children and Personal Life
Claire Trottier keeps her personal and family life relatively private compared to her public advocacy work, but she has confirmed she has children. In interviews, she’s mentioned her kids noticing when the news upsets her, particularly coverage of conflicts and human rights abuses abroad, and asking her why she’s sad. A podcast interview also referenced her sons directly, closing on a reflective note about what she hopes they’ll say about her someday.
Beyond her immediate household, the Claire Trottier family includes her sister Sylvie Trottier, a climate change analyst and fellow signatory of the Millionaires for Humanity letter, along with their parents, Lorne and Louise Rousselle Trottier. The sisters have collaborated professionally for years, first in philanthropy and environmental justice work, and more recently as business partners.
Health Journey: Cancer Survivor
One detail that adds depth to Claire Trottier’s public story is her experience as a cancer survivor. She’s spoken about the process of rebuilding her life and sense of joy after treatment, describing it as part of what shaped her current outlook on both her advocacy and her personal choices. That period of recovery appears connected to her decision to pursue projects that bring her genuine happiness, including her newest venture in the book world.
Joie de Livres: Claire Trottier’s Bookstore Venture
In 2025, Claire Trottier and her sister Sylvie opened Joie de livres, described as Montreal’s first bilingual bookstore-café-bar dedicated to romance and speculative fiction. Located on Saint-Laurent Boulevard in the Mile End neighbourhood, the shop combines a bookstore, coffee bar, and cocktail lounge, with programming that includes book launches, reading nights, and cosplay events.
The venture reflects a lighter, more personal side of Claire Trottier’s public identity. She’s described being an avid romance reader herself, someone who cries over her favourite novels as often as she does over difficult news coverage. Running a bookstore focused on genres she genuinely loves offers a counterbalance to the heavier policy work that dominates her advocacy career.
Claire Trottier Today
So what does Claire Trottier today actually look like, day to day? She splits her time between advocacy commitments, board responsibilities across multiple foundations, and her role co-running Joie de livres alongside her sister. She continues pushing for wealth tax reform through Patriotic Millionaires Canada while also supporting migrant communities through the Collectif Bienvenue.
Claire Trottier today represents a fairly unusual combination: a scientist-turned-advocate who uses inherited wealth to fund causes that could, in theory, reduce the very privileges she was born into. That contradiction is one she addresses directly in interviews rather than avoiding, framing her work as an attempt to align her actions with her stated values.
Frequently Asked Questions
How old is Claire Trottier? Based on a November 2025 interview confirming she was born in 1980, Claire Trottier is approximately 45 to 46 years old as of 2026.
Does Claire Trottier have children? Yes. She has referenced her children in interviews, including her sons, though she keeps most personal family details out of public reporting.
What is Claire Trottier’s connection to Matrox? She’s the daughter of Lorne Trottier, who co-founded Matrox, a Montreal-area computer graphics technology company, giving her family significant wealth from its decades of success.
What does Claire Trottier do today? She leads Patriotic Millionaires Canada, sits on several philanthropic boards, and co-owns Joie de livres, a romance-focused bookstore in Montreal she runs with her sister.
Is Claire Trottier a scientist? Yes. She holds a PhD in microbiology and immunology from McGill University and worked there as an assistant professor until 2021.
Final Thoughts
Claire Trottier’s story doesn’t fit the usual mould of inherited wealth staying quiet or simply growing larger. Between her academic background, her tax justice advocacy, her health journey, and her newest chapter running a romance bookstore with her sister, she’s built a public life defined by contradiction and conviction in equal measure. For readers following Quebec’s philanthropic and advocacy circles, keeping an eye on her ongoing work with Patriotic Millionaires Canada and Joie de livres remains the best way to track what Claire Trottier does next.
