Key facts
- This page summarizes Jay Philip Siegel's Form 4 filing for MACROGENICS INC (MGNX).
- 2 reported transactions and 1 derivative row are listed below.
- Accepted by SEC: 20 May 2026, 16:13.
Jay Philip Siegel - 18 May 2026 Form 4 Insider Report for MACROGENICS INC (MGNX)
- Reporting relationship
- Director
- Issuer ticker
- MGNX
- Reported as of
- 18 May 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 20 May 2026, 16:13:56 UTC
- Prior SEC filing
- 22 May 2025
- Source filing
- View source filing
- Reporting owner signature
- Beth A. Smith, Attorney-in-fact
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
Jay Philip Siegel filed Form 4 for MACROGENICS INC (MGNX) on 20 May 2026.
Change
- Previous filing in this sequence was filed on 22 May 2025.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (1)
CIK 0001722857
Primary reporting owner
SIEGEL JAY PHILIP
- Relationship
- Director
- Address
- 9704 MEDICAL CENTER DRIVE, ROCKVILLE
- Signature
- Beth A. Smith, Attorney-in-fact
- Signature date
- 20 May 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
MGNX
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +3,750
- Change %
- +34%
- Price
- Shares after
- 14,750
- Date
- 18 May 2026
- Ownership
- Direct
- Footnotes
- F1
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
MGNX
transaction
Derivative
Restricted Stock Unit
Options Exercise
- Transaction value
- Shares
- -3,750
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 18 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 3,750
- Exercise price
- $0.000000
- Footnotes
- F1, F2
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Section 16 status
Jay Philip Siegel is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.
Explanation of responses 2 footnotes
Footnote F1
Each restricted stock unit (RSU) represents a contingent right to receive one share of the Issuer's common stock.
Footnote F2
The RSUs vested on May 18, 2026, which was one day prior to the Issuer's 2026 Annual Meeting of Stockholders held on May 19, 2026.