Ticker · CUSIP 556099109
Holders (tracked)
8
Combined shares
8,026,271
Combined value
$12.92M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
SEC event timeline
13 events
- Ken Griffin (Citadel Advisors) added2026-02-17+541,622 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+534,447 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+562,383 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−142,390 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+249,157 shares · 2025Q413F
- +16,429 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+1,207,408 shares · 2025Q413F
- −16,429 shares · 2025Q313F
- Izzy Englander (Millennium Mgmt) added2025-11-14+101,006 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+29,803 shares · 2025Q313F
- AQR Capital Management exited2025-11-14−75,529 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+121,689 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+374,729 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions2
- Steve Cohen (Point72)+249,157$401K
- Paul Tudor Jones (Tudor Investment)+16,429$26K
Added to4
- Renaissance Technologies+1,207,408$1.9M
- Two Sigma Investments+562,383$905K
- Ken Griffin (Citadel Advisors)+541,622$872K
- D.E. Shaw & Co.+534,447$860K
Trimmed1
- Izzy Englander (Millennium Mgmt)−142,390$229K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 9 | $72.2M |
| 2022Q2 | 9 | $37.3M |
| 2022Q3 | 9 | $41K |
| 2022Q4 | 11 | $52.1M |
| 2023Q1 | 12 | $51.4M |
| 2023Q2 | 12 | $44.3M |
| 2023Q3 | 10 | $40.6M |
| 2023Q4 | 9 | $71.0M |
| 2024Q1 | 10 | $96.9M |
| 2024Q2 | 11 | $47.0M |
| 2024Q3 | 10 | $18.9M |
| 2024Q4 | 8 | $15.1M |
| 2025Q1 | 9 | $5.0M |
| 2025Q2 | 9 | $5.0M |
| 2025Q3 | 7 | $8.4M |
| 2025Q4 | 8 | $12.9M |
Who owns MGNX
8 super-investors · 2025Q4
Tracked stake
8.03M
shares
Combined value
$13M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New2Added5Trim1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 2.91M | $5M |
| 2 | Izzy Englander Millennium Mgmt | 1.97M | $3M |
| 3 | Ken Griffin Citadel Advisors | 1.04M | $2M |
| 4 | Two Sigma Investments | 999.5K | $2M |
| 5 | D.E. Shaw & Co. | 756.6K | $1M |
| 6 | Steve Cohen Point72 | 249.2K | $401K |
| 7 | Ken Griffin Citadel Advisors | 86.3K | $139K |
| 8 | Paul Tudor Jones Tudor Investment | 16.4K | $26K |
Recent moves
20 transactions
- +16,429 · 2025Q4
- +534,447 · 2025Q4
- +249,157 · 2025Q4
- +562,383 · 2025Q4
- −142,390 · 2025Q4
- +541,622 · 2025Q4
- +1,207,408 · 2025Q4
- −16,429 · 2025Q3
- +121,689 · 2025Q3
- −75,529 · 2025Q3
- +29,803 · 2025Q3
- +101,006 · 2025Q3
- +374,729 · 2025Q3
- −156,870 · 2025Q2
- +291,614 · 2025Q2
- −247,610 · 2025Q2
- +71,811 · 2025Q2
- SOLDT. Rowe Price−25,652 · 2025Q2
- +174,224 · 2025Q2
- −205,847 · 2025Q1
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