CEO’s GRAT sells 55,768 Celestica (CLS) shares under Rule 10b5-1 plan
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
Celestica Inc.'s Chief Executive Officer Robert Mionis reported a series of open-market sales of Common Shares on June 16, 2026 by an indirect holding vehicle, Mionis 2026 GRAT Number Three. The filing shows aggregate sales of 55,768 shares at weighted average prices generally between about $381 and $396 per share, executed in multiple trades. These transactions were carried out under a pre-arranged Rule 10b5-1 trading plan. After these sales, the filing also reports continuing holdings of 453,697 Common Shares directly and additional indirect holdings of 210,445 and 145,565 Common Shares through two other 2026 GRAT entities.
Positive
- None.
Negative
- None.
Insights
CEO-related trust sells 55,768 Celestica shares under a Rule 10b5-1 plan while substantial direct and indirect holdings remain.
The filing shows that a grantor retained annuity trust associated with CEO Robert Mionis sold 55,768 Celestica Common Shares on June 16, 2026. Individual transactions were executed at weighted average prices around $381–$396 per share in open-market trades.
A key detail is that these dispositions were effected pursuant to a Rule 10b5-1 plan adopted on March 11, 2026, indicating the sales were pre-scheduled rather than opportunistic. The filing also lists sizeable remaining positions: 453,697 shares held directly and 210,445 and 145,565 shares held through two other 2026 GRATs, so the reported sales represent only a portion of the overall stake.
Insider Trade Summary 10b5-1
Net Seller: 55,768 shares ($21,580,050)
Net Sell
18 txns
Insider
MIONIS ROBERT
Role
Chief Executive Officer
Sold
55,768 shs ($21.58M)
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Sale | Common Shares | 4,779 | $382.21 | $1.83M |
| Sale | Common Shares | 5,887 | $383.14 | $2.26M |
| Sale | Common Shares | 5,299 | $384.05 | $2.04M |
| Sale | Common Shares | 6,841 | $385.09 | $2.63M |
| Sale | Common Shares | 5,826 | $386.18 | $2.25M |
| Sale | Common Shares | 7,017 | $387.05 | $2.72M |
| Sale | Common Shares | 4,307 | $388.09 | $1.67M |
| Sale | Common Shares | 3,155 | $389.06 | $1.23M |
| Sale | Common Shares | 3,872 | $390.13 | $1.51M |
| Sale | Common Shares | 1,793 | $391.17 | $701K |
| Sale | Common Shares | 2,418 | $392.24 | $948K |
| Sale | Common Shares | 1,595 | $393.06 | $627K |
| Sale | Common Shares | 868 | $394.05 | $342K |
| Sale | Common Shares | 1,511 | $394.95 | $597K |
| Sale | Common Shares | 600 | $395.86 | $238K |
| holding | Common Shares | -- | -- | -- |
| holding | Common Shares | -- | -- | -- |
| holding | Common Shares | -- | -- | -- |
Holdings After Transaction:
Common Shares — 129,549 shares (Indirect, By Mionis 2026 GRAT Number Three);
Common Shares — 453,697 shares (Direct, null)
Footnotes (1)
- This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 11, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $381.61-$382.60, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $382.62-$383.59 inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $383.61-$384.60, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $384.64-$385.59, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $385.61-$386.60, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $386.61-$387.58, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $387.61-$388.56, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $388.62-$389.59, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $389.63-$390.545, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $390.62-$391.585, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $391.62-$392.56, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $392.69-$393.57, inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $393.66-$394.5675 inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $394.65-$395.50 inclusive. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
Key Figures
Shares sold: 55,768 shares
Highest weighted average sale price: $395.50/share
Lowest weighted average sale price: $381.61/share
+5 more
8 metrics
Shares sold
55,768 shares
Aggregate Common Shares sold on June 16, 2026
Highest weighted average sale price
$395.50/share
Upper end of disclosed trade price ranges
Lowest weighted average sale price
$381.61/share
Lower end of disclosed trade price ranges
Direct holdings after transactions
453,697 shares
Common Shares held directly by Robert Mionis
Holdings in 2026 GRAT Number One
210,445 shares
Indirect Common Share holdings via Mionis 2026 GRAT Number One
Holdings in 2026 GRAT Number Two
145,565 shares
Indirect Common Share holdings via Mionis 2026 GRAT Number Two
Number of sale transactions
15 transactions
Open-market sale entries reported in Form 4
Rule 10b5-1 plan adoption date
March 11, 2026
Date CEO adopted trading plan for these sales
Key Terms
Rule 10b5-1 plan, weighted average price, open-market sale, grantor retained annuity trust (GRAT), +1 more
5 terms
Rule 10b5-1 plan regulatory
"This transaction was effected pursuant to a Rule 10b5-1 plan adopted by the reporting person on March 11, 2026."
A Rule 10b5-1 plan is a prearranged, written schedule that lets corporate insiders buy or sell company stock at set times or amounts, even if they later learn material nonpublic information. Think of it like setting an automatic thermostat for trades: it creates a clear record that trades were planned in advance, reducing the risk of insider-trading accusations and helping investors trust that insider transactions are routine rather than based on secret information.
weighted average price financial
"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions..."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
open-market sale financial
"transaction_action: "open-market sale" and transaction_code_description: "Sale in open market or private transaction""
An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.
grantor retained annuity trust (GRAT) financial
"nature_of_ownership: "By Mionis 2026 GRAT Number Three" and similar GRAT references"
indirect ownership financial
"ownership_type: "indirect" and direct_or_indirect: "I" for shares held through GRAT entities"
FAQ
Through what entity did Robert Mionis’s June 16, 2026 Celestica (CLS) sales occur?
The reported open-market sales were made indirectly through Mionis 2026 GRAT Number Three, a grantor retained annuity trust. The Form 4 identifies this GRAT as the nature of ownership for the sold Common Shares, distinguishing it from his other direct and indirect holdings.
What Celestica (CLS) holdings does Robert Mionis report after these transactions?
After the reported sales, the filing shows 453,697 Common Shares held directly by Robert Mionis. It also lists indirect holdings of 210,445 Common Shares through Mionis 2026 GRAT Number One and 145,565 Common Shares through Mionis 2026 GRAT Number Two.