stock·research
TSX

CSU.TO

Constellation Software Inc.

Constellation Software acquires and operates vertical market software businesses serving niche industries globally.

CA$2,969.32
+2.34%
7d
+5.19%
30d
+23.70%
1y
-39.38%
5y
Mkt cap
52w high
CA$5,060.70
52w low
CA$2,196.00
Captured
5/8/2026
At capture
$2,554.14
Status
researching
Price · 12M
Return
-38.52%
Start
$4,829.99 · 6/9/2025
High
$5,005.00 · 6/30/2025
-40.67% from now
Low
$2,295.18 · 4/6/2026
+29.37% from now
-24.2%2026-01-26 · -24.2% · click to see why-24.9%2026-02-02 · -24.9% · click to see why-29.1%2026-02-09 · -29.1% · click to see why+17.9%2026-03-02 · +17.9% · click to see why+17.6%2026-03-02 · +17.6% · click to see why+21.6%2026-06-01 · +21.6% · click to see why
Tap a marker to jump to its catalyst hypothesis below.
Performance analysis
Performance — distance from 52-week range
Below 52w high
-45.75%$2,715.00 vs $5,005.00
Above 52w low
+18.29%$2,715.00 vs $2,295.18
52w low $2,295.1852w high $5,005.00
Current: $2,715.00 (15% of range)
Returns vs benchmarks
WindowStockvs S&P 500vs TSX 60vs NASDAQFrom window highAbove window low
7D
+0.00%
+0.0 pp(+0.00%)
+0.0 pp(+0.00%)
+0.0 pp(+0.00%)
+0.00%+0.00%
14D
+3.93%
+3.6 pp(+0.33%)
+2.4 pp(+1.53%)
+3.8 pp(+0.17%)
+0.00%+3.93%
28D
+11.18%
+8.4 pp(+2.81%)
+10.1 pp(+1.06%)
+6.6 pp(+4.60%)
+0.00%+11.18%
YTD
-18.34%
-25.0 pp(+6.70%)
-23.2 pp(+4.89%)
-29.3 pp(+10.98%)
-18.34%+18.29%
3M
+7.71%
-0.3 pp(+8.05%)
+6.0 pp(+1.75%)
-8.2 pp(+15.89%)
-8.38%+18.29%
6M
-19.73%
-28.3 pp(+8.52%)
-28.7 pp(+8.94%)
-32.2 pp(+12.43%)
-19.73%+18.29%
12M
-45.44%
-71.2 pp(+25.73%)
-73.4 pp(+27.95%)
-82.9 pp(+37.44%)
-45.75%+18.29%
24M
-28.38%
-69.2 pp(+40.84%)
-78.8 pp(+50.40%)
-85.4 pp(+56.98%)
-46.90%+18.29%
5Y
+56.59%
-20.2 pp(+76.80%)
-12.3 pp(+68.88%)
-34.5 pp(+91.07%)
-46.90%+56.59%
Alpha = stock return − benchmark return over the same window. Positive = outperforming.
Biggest single-day gains
  • 3/2/2026+17.56%
    Unclear — needs news lookup; likely a strong Q4 2025 earnings beat or major acquisition announcement given the magnitude of the move.
  • 4/13/2026+14.43%
    Unclear — needs news lookup; possibly a recovery rally following earlier sharp declines or a positive earnings/guidance update.
  • 9/29/2025+10.10%
    Unclear — needs news lookup; potentially a strong Q3 2025 earnings release or a rebound from the sharp single-day drop one week prior.
Biggest single-day drops
  • 9/22/2025-17.14%
    Unclear — needs news lookup; likely a significant earnings miss, profit warning, or negative acquisition-related disclosure given the severity of the decline.
  • 3/9/2026-14.82%
    Unclear — needs news lookup; possibly a post-earnings sell-off reversal or negative macro/sector development following the sharp gain the prior week.
  • 1/12/2026-14.43%
    Unclear — needs news lookup; likely connected to the broader late-January drawdown period, possibly a guidance cut or negative company-specific disclosure.
Biggest 5-day rallies
  • 11/27/2023+20.74%
    Likely driven by a strong Q3 2023 earnings report combined with a broad market rally as investors anticipated a Federal Reserve rate-cutting cycle.
  • 3/2/2026+17.92%
    Unclear — needs news lookup; consistent with the single-day +17.6% on the same date, suggesting a major positive catalyst such as an earnings beat or significant strategic announcement.
  • 7/22/2024+17.36%
    Likely attributable to a strong Q2 2024 earnings release showcasing continued robust free cash flow growth and acquisition activity.
Biggest 5-day selloffs
  • 2/9/2026-29.12%
    Unclear — needs news lookup; a -29% five-day move suggests a severe negative catalyst, possibly a deeply disappointing earnings report or a major strategic/guidance reversal in early 2026.
  • 2/2/2026-24.85%
    Unclear — needs news lookup; part of the same late-January to mid-February 2026 drawdown, suggesting a sustained negative development such as an earnings miss or macro shock affecting the software sector.
  • 1/26/2026-24.22%
    Unclear — needs news lookup; likely the onset of the major early-2026 selloff, possibly triggered by a profit warning, disappointing preliminary results, or a significant macro or geopolitical shock.
Source: Yahoo Finance daily closes; benchmarks ^GSPC, ^TX60, ^IXIC. Inflection hypotheses generated by Claude — verify before relying on them.
Source & thesis
otherMichael

Long-term serial acquirer of vertical-market software businesses; high-quality compounder with disciplined capital allocation under Mark Leonard. Currently ~50% off 52w high — worth a closer look.

compounderserial-acquirervmscanadian
Decision support, not financial advice. Verify everything independently before buying.
AI summary · 5/21/2026

Constellation Software is a Canadian holding company that acquires, manages, and builds vertical market software businesses across a wide range of industries including public transit, healthcare, utilities, and more. Founded and led by Mark Leonard, the company has compounded capital at exceptional rates through disciplined, decentralized acquisitions of mission-critical niche software. It operates hundreds of subsidiary businesses and has a long track record of generating strong free cash flow.

Bull case

Constellation has one of the best long-term capital allocation track records of any public company, with Mark Leonard having grown book value and intrinsic value at high rates for over two decades. The stock is approximately 46% off its 52-week high, which for a high-quality compounder could represent a meaningful entry opportunity if the decline is sentiment- or macro-driven rather than fundamental. The business model is highly recurring, sticky, and diversified across hundreds of niche software verticals, making it resilient to any single customer or sector downturn. Constellation has been expanding its addressable market by pursuing larger acquisitions (Spin-Meisters, Lumine Group spin-off) and entering new geographies, extending the runway for compounding. At a lower price, the implied return on a long-term hold improves significantly for a business that has rarely traded at a discount.

Bear case

Even at ~2715 CAD (~46% off the high), Constellation trades at a premium multiple relative to most software companies, and any compression in the market's willingness to pay for compounder-style businesses could push it lower still. The acquisition pipeline faces increasing competition as private equity and other strategic buyers have crowded into vertical market software, potentially compressing returns on deployed capital going forward. Mark Leonard's eventual succession is a long-term overhang — the business is deeply tied to his philosophy and judgment. The 52-week decline may partly reflect genuine concerns about slowing organic growth or deteriorating acquisition economics that are not yet fully reflected in consensus estimates. Currency risk is also real: CSU reports in USD but trades in CAD, adding FX complexity for CAD-based investors.

Risk summary

Business risks: acquisition economics may deteriorate as vertical market software becomes more competitive; organic growth is modest and the model depends heavily on continued deal flow. Valuation risk: still trades at a premium multiple even after the drawdown; further multiple compression is possible in a higher-rate or risk-off environment. Macro risk: rising interest rates increase the hurdle rate for acquisitions and compress the present value of long-duration cash flows. Execution risk: succession planning for Mark Leonard is unresolved; scaling beyond small/mid VMS into larger deals introduces integration and capital allocation risk.

What must be true

You must believe that (1) the ~46% drawdown is primarily multiple compression or macro-driven, not a sign of structural deterioration in acquisition returns or free cash flow quality; (2) Constellation can continue to deploy meaningful capital at attractive IRRs despite a more competitive landscape; (3) Mark Leonard or his designated successors maintain the disciplined, decentralized culture that has driven compounding; and (4) you are comfortable owning a high-multiple business through potential further volatility, with a multi-year time horizon.

research morerisk: moderatedcaconviction 3/5confidence 52/100

CSU is a legitimately high-quality business and the ~46% drawdown from the 52-week high is attention-worthy for a proven compounder. However, the stock still trades at a premium valuation and the share price of ~2715 CAD means a single share is nearly 3x the default confidence-3 target of $1000, making position sizing awkward. Recommend more research into recent earnings and acquisition pipeline health before committing, and consider waiting for a dip toward the 2500 CAD level to improve the entry math.

Watch price
CA$2,500.00
Alloc range
1% – 2.5%
Attractive below
CA$2,500.00
Fair value
CA$3,200.00
Position plan (per your thesis)
Fee-efficient
2× base = CA$1,000.00

At 2715 CAD per share, 1 share costs ~2715 CAD (~$2715 USD equivalent), and the IBKR fixed fee is the $1.00 minimum — approximately 0.04% of gross, well under the 0.3% threshold. However, one share at ~$2715 significantly overshoots the $1000 default target for confidence 3; the user should consciously decide whether this single-share purchase represents an intentional larger bet or whether to wait for a dip that would make the position size feel more proportionate.

Buy plans
Alerts on this idea
None set.