STOCK TITAN

Monte Rosa (GLUE) CMO sells 41,845 shares after exercising options

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Monte Rosa Therapeutics Chief Medical Officer Filip Janku reported option exercises and share sales in GLUE stock. On June 23–24, he exercised options to acquire 36,000 shares of common stock at $7.56 per share and sold a total of 41,845 shares in open-market transactions at weighted average prices of $20.2214 and $21.4227 per share. These trades were executed under a pre-arranged Rule 10b5-1 trading plan adopted on March 4, 2026. After the transactions, he directly holds 59,992 shares of Monte Rosa common stock.

Positive

  • None.

Negative

  • None.
Insider Janku Filip
Role Chief Medical Officer
Sold 41,845 shs ($882K)
Type Security Shares Price Value
Exercise Stock Option (Right to Buy) 30,000 $0.00 --
Exercise Common Stock 30,000 $7.56 $227K
Sale Common Stock 30,000 $21.4227 $643K
Exercise Stock Option (Right to Buy) 6,000 $0.00 --
Exercise Common Stock 6,000 $7.56 $45K
Sale Common Stock 11,845 $20.2214 $240K
Holdings After Transaction: Stock Option (Right to Buy) — 66,000 shares (Direct, null); Common Stock — 89,992 shares (Direct, null)
Footnotes (1)
  1. These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.95 to $20.50, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.30 to $21.59, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range. The shares underlying this option are fully vested and exercisable.
Total shares sold 41,845 shares Open-market sales on June 23–24, 2026
June 23 weighted average sale price $20.2214 per share Common stock sales on June 23, 2026
June 24 weighted average sale price $21.4227 per share Common stock sales on June 24, 2026
Options exercised 36,000 shares Common stock acquired via option exercises
Option exercise price $7.56 per share Stock Option (Right to Buy) conversion
Post-transaction holdings 59,992 shares Common stock directly held after June 24, 2026
Rule 10b5-1 trading plan regulatory
"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026."
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
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.
Stock Option (Right to Buy) financial
"Stock Option (Right to Buy)"
derivative security financial
"Exercise or conversion of derivative security"
A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.
open-market sale financial
"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.
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Learn about SEC filing dates
SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
X
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Janku Filip

(Last)(First)(Middle)
MONTE ROSA THERAPEUTICS, INC.
321 HARRISON AVENUE, SUITE 900

(Street)
BOSTON MASSACHUSETTS 02118

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Monte Rosa Therapeutics, Inc. [ GLUE ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director10% Owner
XOfficer (give title below)Other (specify below)
Chief Medical Officer
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/23/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/23/2026M(1)6,000A$7.5671,837D
Common Stock06/23/2026S(1)11,845D$20.2214(2)59,992D
Common Stock06/24/2026M(1)30,000A$7.5689,992D
Common Stock06/24/2026S(1)30,000D$21.4227(3)59,992D
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)$7.5606/23/2026M(1)6,000 (4)10/03/2032Common Stock6,000$096,000D
Stock Option (Right to Buy)$7.5606/24/2026M(1)30,000 (4)10/03/2032Common Stock30,000$066,000D
Explanation of Responses:
1. These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 4, 2026.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $19.95 to $20.50, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.
3. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $21.30 to $21.59, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range.
4. The shares underlying this option are fully vested and exercisable.
Remarks:
Exhibit 24.2 - Substitute Power of Attorney
/s/ Phil Nickson, Attorney-in-Fact06/25/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transactions did Monte Rosa Therapeutics (GLUE) report for Filip Janku?

Monte Rosa Therapeutics reported that Chief Medical Officer Filip Janku exercised options for 36,000 GLUE shares and sold 41,845 shares in open-market trades. The transactions occurred on June 23 and June 24, 2026, and were disclosed in a Form 4 filing.

How many Monte Rosa (GLUE) shares did the CMO sell and at what prices?

Filip Janku sold a total of 41,845 Monte Rosa common shares in open-market transactions. Weighted average sale prices were $20.2214 per share on June 23, 2026, and $21.4227 per share on June 24, 2026, across multiple trades within stated price ranges.

Did the Monte Rosa (GLUE) CMO exercise stock options in this Form 4?

Yes. The Form 4 shows Filip Janku exercised stock options covering 36,000 Monte Rosa shares at an exercise price of $7.56 per share. These option exercises converted derivative positions into common stock immediately before related open-market sales on June 23 and June 24, 2026.

How many Monte Rosa Therapeutics (GLUE) shares does the CMO hold after these trades?

After the reported transactions, Chief Medical Officer Filip Janku directly holds 59,992 Monte Rosa common shares. This post-transaction figure appears in the Form 4 as the total shares owned following the June 24, 2026, open-market sale of 30,000 shares.

Were the GLUE insider sales made under a Rule 10b5-1 trading plan?

Yes. A footnote states the transactions were effected under a Rule 10b5-1 trading plan adopted by Filip Janku on March 4, 2026. Such pre-arranged plans allow insiders to schedule trades in advance, helping separate trading timing from day-to-day discretion.

What price ranges applied to the Monte Rosa (GLUE) share sales in this filing?

The Form 4 discloses weighted average sale prices with ranges. On June 23, 2026, shares sold between $19.95 and $20.50. On June 24, 2026, shares sold between $21.30 and $21.59. The insider offers to provide detailed trade breakdowns upon request.