Comparable stake leader
ARMISTICE CAPITAL, LLC
SEC ownership of MACROGENICS INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001125345.
Disclosed value leader
ARMISTICE CAPITAL, LLC
Comparable rows
50/50
Latest evidence
01 Jun 2026
- Public ticker
- MGNX on Nasdaq
- Parsed ownership sources
-
13F and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
ARMISTICE CAPITAL, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
ARMISTICE CAPITAL, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
01 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001125345
- Issuer location
- Rockville, MD
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of MACROGENICS INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
ARMISTICE CAPITAL, LLC
Disclosed value leader
ARMISTICE CAPITAL, LLC
Comparable rows
50/50
Latest evidence
01 Jun 2026
13F
13D/G
Lead comparable stake: 9.5%
13D/G row: ARMISTICE CAPITAL, LLC
Showing 1-8 of 50 holder rows.
Quick read
ARMISTICE CAPITAL, LLC leads the comparable SEC ownership view at 9.5%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens ARMISTICE CAPITAL, LLC's linked filing trail.
Comparable ownership
Top 5
ARMISTICE CAPITAL, LLC
9.5%
MILLENNIUM MANAGEMENT LLC
5.4%
BANK OF AMERICA CORP /DE/
5.1%
WASATCH ADVISORS LP
3.1%
BlackRock, Inc.
2.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| ARMISTICE CAPITAL, LLC |
13F
13D/G
Company
|
9.5%
from 13D/G
|
$17,374,680
6,012,000 shares
|
— | 31 Mar 2026 |
| MILLENNIUM MANAGEMENT LLC |
13D/G
13F
Company
|
5.4%
|
$12,092,974
3,435,504 shares
|
+$6,023,614 | 01 Jun 2026 |
| BANK OF AMERICA CORP /DE/ |
13D/G
13F
Company
|
5.1%
|
$11,730,866
3,258,574 shares
|
$0 | 31 Mar 2026 |
| WASATCH ADVISORS LP |
13F
13D/G
Company
|
3.1%
from 13D/G
|
$4,507,536
1,559,701 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
2.9%
from 13D/G
|
$3,361,492
1,163,146 shares
|
— | 31 Mar 2026 |
| RENAISSANCE TECHNOLOGIES LLC |
13F
Company
|
4.7%
|
$8,564,686
2,963,559 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
4.2%
|
$7,669,635
2,653,853 shares
|
— | 31 Mar 2026 |
| ACADIAN ASSET MANAGEMENT LLC |
13F
Company
|
4%
|
$7,346,000
2,544,000 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to buying over the last 12 months. Net value: +$150,515.
Buys
$150,515
Insiders: 1
Sells
$0
Insiders: 0
Net
+$150,515
Shares: +100,000
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 100,000
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 100,000 | 0 | $150,515 | $0 | +$150,515 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 21 reporting-owner rows connected to MACROGENICS INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
21
Largest Forms 3/4/5 holder
BIOTECH TARGET N V
Net 12M change
+$150,515
Latest report
19 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| BIOTECH TARGET N V | 10%+ Owner | $119,159,556 | Mixed | 02 Oct 2023 | ||
| Scott Koenig | Director | $1,678,069 | Mixed | 19 May 2026 | ||
| Lynn Cilinski | VP, Controller and Treasurer | $1,163,583 | Mixed | 15 Feb 2024 | ||
| Stephen L. Eck | Chief Medical Officer | $698,476 | Mixed | 15 Feb 2025 | ||
| William K. Heiden | Director | $499,102 | +$150,515 | +43% | Mixed | 18 May 2026 |
| Edward Hurwitz | Director | $424,116 | Mixed | 18 May 2026 | ||
| James Karrels | SVP and CFO | $390,720 | Mixed | 12 Feb 2026 | ||
| David C. Stump | Director | $328,532 | Mixed | 18 May 2026 | ||
| Scott Thomas Jackson | Director | $328,532 | Mixed | 18 May 2026 | ||
| Karen Jean Ferrante | Director | $328,532 | Mixed | 18 May 2026 | ||
| Ezio Bonvini | Sr VP, Research & CSO | $291,978 | Mixed | 12 Feb 2026 | ||
| Federica F. O'Brien | Director | $271,497 | Mixed | 18 May 2026 | ||
| Meenu Chhabra | Director | $251,497 | Mixed | 18 May 2026 | ||
| Margaret Liu | Director | $221,447 | Mixed | 18 May 2026 | ||
| Jay Philip Siegel | Director | $221,447 | Mixed | 18 May 2026 | ||
| Eric Blasius Risser | President and CEO, Director | $174,620 | Mixed | 12 Feb 2026 | ||
| Thomas Spitznagel | Sr VP, Technical Ops | $100,038 | Mixed | 12 Feb 2026 | ||
| Jeffrey Stuart Peters | Senior VP, GC, and Secretary | $87,319 | Mixed | 12 Feb 2026 | ||
| Beth Ann Smith | VP, Controller & Treasurer | $24,658 | Mixed | 12 Feb 2026 | ||
| Kenneth Galbraith | Director | $22,650 | Mixed | 13 May 2021 |
Recent insider transactions for MACROGENICS INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Federica F. O'Brien | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Federica F. O'Brien | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Scott Thomas Jackson | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Scott Thomas Jackson | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| William K. Heiden | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| William K. Heiden | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Margaret Liu | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Margaret Liu | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Meenu Chhabra | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Meenu Chhabra | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Edward Hurwitz | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Edward Hurwitz | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| David C. Stump | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| David C. Stump | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Karen Jean Ferrante | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Karen Jean Ferrante | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Scott Koenig | MGNX | Stock Option (right to buy) | Award | 22,000 | 22,000 | 19 May 2026 | Direct | |||
| Scott Koenig | MGNX | Restricted Stock Unit | Award | 3,750 | 3,750 | 19 May 2026 | Direct | |||
| Federica F. O'Brien | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| Federica F. O'Brien | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Scott Thomas Jackson | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| Scott Thomas Jackson | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| William K. Heiden | MGNX | Common Stock | Options Exercise | 3.38% | 3,750 | 114,750 | 18 May 2026 | Direct | ||
| William K. Heiden | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Jay Philip Siegel | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| Jay Philip Siegel | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Margaret Liu | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| Margaret Liu | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Meenu Chhabra | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| Meenu Chhabra | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Edward Hurwitz | MGNX | Common Stock | Options Exercise | 8.51% | 3,750 | 47,824 | 18 May 2026 | Direct | ||
| Edward Hurwitz | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| David C. Stump | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| David C. Stump | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Karen Jean Ferrante | MGNX | Common Stock | Options Exercise | 34.1% | 3,750 | 14,750 | 18 May 2026 | Direct | ||
| Karen Jean Ferrante | MGNX | Restricted Stock Unit | Options Exercise | -100% | -3,750 | 0 | 18 May 2026 | Direct | ||
| Ezio Bonvini | MGNX | Common Stock | Tax liability | -4.23% | -6,433 | 145,799 | 15 Feb 2026 | Direct | ||
| Ezio Bonvini | MGNX | Common Stock | Options Exercise | 12.3% | 16,665 | 152,232 | 15 Feb 2026 | Direct | ||
| Ezio Bonvini | MGNX | Restricted Stock Unit | Options Exercise | -100% | -16,665 | 0 | 15 Feb 2026 | Direct | ||
| Beth Ann Smith | MGNX | Common Stock | Tax liability | -3.2% | -423 | 12,781 | 15 Feb 2026 | Direct | ||
| Beth Ann Smith | MGNX | Common Stock | Options Exercise | 9.04% | 1,095 | 13,204 | 15 Feb 2026 | Direct | ||
| Beth Ann Smith | MGNX | Restricted Stock Unit | Options Exercise | -100% | -1,095 | 0 | 15 Feb 2026 | Direct | ||
| James Karrels | MGNX | Common Stock | Tax liability | -2.73% | -5,790 | 206,037 | 15 Feb 2026 | Direct | ||
| James Karrels | MGNX | Common Stock | Options Exercise | 7.62% | 14,999 | 211,827 | 15 Feb 2026 | Direct | ||
| James Karrels | MGNX | Restricted Stock Unit | Options Exercise | -100% | -14,999 | 0 | 15 Feb 2026 | Direct | ||
| Jeffrey Stuart Peters | MGNX | Common Stock | Tax liability | -14.2% | -5,147 | 31,105 | 15 Feb 2026 | Direct | ||
| Jeffrey Stuart Peters | MGNX | Common Stock | Options Exercise | 58.2% | 13,332 | 36,252 | 15 Feb 2026 | Direct | ||
| Jeffrey Stuart Peters | MGNX | Restricted Stock Unit | Options Exercise | -100% | -13,332 | 0 | 15 Feb 2026 | Direct | ||
| Thomas Spitznagel | MGNX | Common Stock | Tax liability | -12.5% | -5,520 | 38,543 | 15 Feb 2026 | Direct | ||
| Thomas Spitznagel | MGNX | Common Stock | Options Exercise | 43.4% | 13,332 | 44,063 | 15 Feb 2026 | Direct |
* marks a reported price that did not pass the local price check.