Insiders Trades

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MH

Mark Henri Leonard

Constellation Software Inc.

Insider activity · 24 months0 buys4 salesCumulative net flow

Nov 24 · 0 buys · 0 salesDec 24 · 0 buys · 0 salesJan 25 · 0 buys · 0 salesFeb 25 · 0 buys · 1 saleMar 25 · 0 buys · 3 salesApr 25 · 0 buys · 0 salesMay 25 · 0 buys · 0 salesJun 25 · 0 buys · 0 salesJul 25 · 0 buys · 0 salesAug 25 · 0 buys · 0 salesSept 25 · 0 buys · 0 salesOct 25 · 0 buys · 0 salesNov 25 · 0 buys · 0 salesDec 25 · 0 buys · 0 salesJan 26 · 0 buys · 0 salesFeb 26 · 0 buys · 0 salesMar 26 · 0 buys · 0 salesApr 26 · 0 buys · 0 salesMay 26 · 0 buys · 0 salesJun 26 · 0 buys · 0 salesJul 26 · 0 buys · 0 salesAug 26 · 0 buys · 0 salesSept 26 · 0 buys · 0 salesOct 26 · 0 buys · 0 sales

Total declarations

96

Company

1

▲ Purchases (0 ops.)

—

▼ Sales (13 ops.)

€104.6M

Latest filing published 22 Dec 2025 for Constellation Software Inc., €614k. Read the official filing

Filing timeline

BuySale

Mark Henri Leonard

Insider track record

Disclosed buys

0

Disclosed sells

13

Signal history

Mark Henri Leonard: trading record in brief

Mark Henri Leonard discloses dealings in Constellation Software Inc. to SEDI. In total, 96 filings cover trades dated from 13 June 2006 to 15 December 2025.

Every open-market trade on record is a sale: 13 sales worth €104.6M. Outside the open market, there are 51 share grants. Since January 2025: no purchases and 4 sales on the market.

On 22 December 2025 came the latest disclosure, a transaction for €614k in Constellation Software Inc. Filings reach the SEDI feed a median of 3 days after the trade. The shorter that gap, the sooner other investors can see what insiders have done. Keep in mind that insiders sell for many reasons unrelated to the outlook, from tax bills to estate planning. Every figure here comes from the filings published by SEDI and describes the past, not future prices; it is not investment advice.

Companies and markets linked to Mark Henri Leonard

Open company profiles for insider transactions, fundamentals and analyst consensus when available.

Constellation Software Inc. (CA)

Declarations95 total

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives15 Dec 2025Constellation Software Inc.

992,346 CAD15SEDI ↗

300 shares@ CA$3,307.8237.2% of flowCommon SharesTSXSEDI:4627115

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives10 Dec 2025Constellation Software Inc.

206,707 sharesCommon SharesTSXSEDI:4621949

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives10 Dec 2025Constellation Software Inc.

206,707 sharesCommon SharesTSXSEDI:4621950

●

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives10 Dec 2025Constellation Software Inc.

2,127 sharesCommon SharesTSXSEDI:4619685

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives10 Dec 2025Constellation Software Inc.

2,127 sharesCommon SharesTSXSEDI:4619684

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives1 Dec 2025Constellation Software Inc.

6,447 sharesCommon SharesTSXSEDI:4615058

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives1 Dec 2025Constellation Software Inc.

6,447 sharesCommon SharesTSXSEDI:4615059

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives2 Dec 2025Constellation Software Inc.

100 sharesCommon SharesTSXSEDI:4615062

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives26 Nov 2025Constellation Software Inc.

195,641 sharesCommon SharesTSXSEDI:4612268

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives26 Nov 2025Constellation Software Inc.

195,641 sharesCommon SharesTSXSEDI:4612267

●

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives24 Nov 2025Constellation Software Inc.

2,492 sharesCommon SharesTSXSEDI:4610137

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives24 Nov 2025Constellation Software Inc.

2,492 sharesCommon SharesTSXSEDI:4610133

●

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives3 Jun 2025Constellation Software Inc.

737,841 CAD11SEDI ↗

150 shares@ CA$4,918.940.1% of flowCommon SharesTSXSEDI:4521121

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives26 Mar 2025Constellation Software Inc.

14M CAD11SEDI ↗

3,000 shares@ CA$4,670.741.5% of flowCommon SharesTSXSEDI:4483759

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives25 Mar 2025Constellation Software Inc.

35M CAD11SEDI ↗

7,500 shares@ CA$4,710.373.8% of flowCommon SharesTSXSEDI:4483758

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives24 Mar 2025Constellation Software Inc.

16M CAD11SEDI ↗

3,500 shares@ CA$4,691.151.7% of flowCommon SharesTSXSEDI:4483757

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives27 Feb 2025Constellation Software Inc.

9M CAD11SEDI ↗

2,000 shares@ CA$4,607.581.0% of flowCommon SharesTSXSEDI:4483760

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives12 Jun 2024Constellation Software Inc.

14M CAD0SEDI ↗

3,500 shares@ CA$3,859.88Common SharesTSXSEDI:4331750

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives25 Mar 2024Constellation Software Inc.

14M CAD11SEDI ↗

3,600 shares@ CA$3,793.252.5% of flowCommon SharesTSXSEDI:4289800

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives27 Mar 2024Constellation Software Inc.

1M CAD11SEDI ↗

300 shares@ CA$3,751.410.2% of flowCommon SharesTSXSEDI:4289803

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives26 Mar 2024Constellation Software Inc.

11M CAD11SEDI ↗

3,000 shares@ CA$3,763.362.0% of flowCommon SharesTSXSEDI:4289801

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives22 Mar 2024Constellation Software Inc.

13M CAD11SEDI ↗

3,400 shares@ CA$3,793.252.3% of flowCommon SharesTSXSEDI:4286616

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives15 Mar 2024Constellation Software Inc.

8M CAD11SEDI ↗

2,000 shares@ CA$3,766.231.4% of flowCommon SharesTSXSEDI:4281199

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Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives13 Mar 2024Constellation Software Inc.

247,785 CAD11SEDI ↗

66 shares@ CA$3,754.320.0% of flowCommon SharesTSXSEDI:4280092

▼

Mark Henri Leonard

4 - Director of Issuer, 5 - Senior Officer of IssuerExecutives14 Mar 2024Constellation Software Inc.

8M CAD11SEDI ↗

2,000 shares@ CA$3,766.231.3% of flowCommon SharesTSXSEDI:4280099

25 of 95 declarations