MacroGenics, Inc. (MGNX) Ownership
MGNX ownership summary
as of October 18, 2026- Institutions
- 76.4% of shares outstanding
- Insiders
- 3.49% of shares outstanding
- Shares outstanding
- 63.7M
- Float
- 56.4M shares available to trade
- Short interest
- 11.45% 7.0M shares short
- Days to cover
- 12.63 short interest up 0.1% vs prior month
- Institutions 76.44%
- Insiders 3.49%
- Other investors 20.06%
MGNX top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Armistice Capital, LLC | 7.86% | 5.0M | $16.3M | −1.0M (−16.7%) | June 30, 2026 |
| 2 | BlackRock Inc | 7.35% | 4.7M | $15.2M | +3.5M (+302.3%) | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 4.17% | 2.7M | $8.6M | +2,157 (+0.1%) | June 30, 2026 |
| 4 | Renaissance Technologies Corp | 4.13% | 2.6M | $8.6M | −330,809 (−11.2%) | June 30, 2026 |
| 5 | Acadian Asset Management LLC | 3.99% | 2.5M | $8.3M | −1,357 (−0.1%) | June 30, 2026 |
| 6 | Bank of America Corp | 3.91% | 2.5M | $8.1M | +86,438 (+3.6%) | June 30, 2026 |
| 7 | Two Sigma Investments LLC | 3.87% | 2.5M | $8.0M | −62,130 (−2.5%) | June 30, 2026 |
| 8 | Millennium Management LLC | 3.73% | 2.4M | $7.7M | −420,061 (−15.0%) | June 30, 2026 |
| 9 | Wasatch Advisors LP | 3.17% | 2.0M | $6.6M | +459,180 (+29.4%) | June 30, 2026 |
| 10 | RA Capital Management, LLC | 2.93% | 1.9M | $6.1M | — | June 30, 2026 |
| 11 | Vanguard Portfolio Management, LLC | 2.86% | 1.8M | $5.9M | +611,456 (+50.6%) | June 30, 2026 |
| 12 | Mackenzie Investments | 2.58% | 1.6M | $5.3M | +1.0M (+174.9%) | June 30, 2026 |
| 13 | Marshall Wace Asset Management Ltd | 2.54% | 1.6M | $5.3M | −409,306 (−20.2%) | June 30, 2026 |
| 14 | Geode Capital Management, LLC | 2.48% | 1.6M | $5.1M | +879,228 (+126.1%) | June 30, 2026 |
| 15 | Affinity Asset Advisors, LLC | 1.91% | 1.2M | $4.0M | +716,606 (+143.3%) | June 30, 2026 |
| 16 | D. E. Shaw & Co LP | 1.67% | 1.1M | $3.5M | +4,567 (+0.4%) | June 30, 2026 |
| 17 | Jacobs Levy Equity Management, Inc. | 1.57% | 1.0M | $3.3M | +561,131 (+127.2%) | June 30, 2026 |
| 18 | Connor Clark & Lunn Inv Mgmt Ltd | 1.57% | 1.0M | $3.3M | +133,163 (+15.4%) | June 30, 2026 |
| 19 | State Street Corp | 1.36% | 864K | $2.8M | +569,976 (+194.1%) | June 30, 2026 |
| 20 | The Goldman Sachs Group Inc | 0.88% | 558K | $1.8M | +284,523 (+104.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 13 holders added 8.9M shares and 6 cut 2.2M.
MGNX top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 3.02% | 1.9M | $6.3M | — | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.46% | 1.6M | $5.1M | −18,048 (−1.1%) | September 30, 2026 |
| 3 | Wasatch Ultra Growth | 1.75% | 1.1M | $3.6M | −316,532 (−22.1%) | June 30, 2026 |
| 4 | Canada Life US Small-Mid Cap Growth F | 1.42% | 903K | $2.9M | +180,773 (+25.0%) | July 31, 2026 |
| 5 | Wasatch Micro Cap | 1.21% | 771K | $2.5M | +771,218 (0.0%) | June 30, 2026 |
| 6 | Fidelity Small Cap Index | 1.07% | 683K | $2.2M | +4,064 (+0.6%) | July 31, 2026 |
| 7 | Vanguard Strategic Small-Cap Equity Inv | 0.83% | 529K | $1.7M | +90,128 (+20.5%) | June 30, 2026 |
| 8 | iShares Russell 2000 Growth ETF | 0.81% | 518K | $1.7M | −655 (−0.1%) | September 30, 2026 |
| 9 | PPF Helix Biotechnology I USD | 0.69% | 439K | $1.4M | +79,426 (+22.1%) | June 30, 2026 |
| 10 | Vanguard VIF Small Co Gr | 0.69% | 438K | $1.4M | — | June 30, 2026 |
| 11 | Vanguard Explorer Inv | 0.66% | 422K | $1.4M | +243,376 (+136.6%) | June 30, 2026 |
| 12 | Nomura Healthcare Fund Class I | 0.66% | 420K | $1.4M | — | August 31, 2026 |
| 13 | Vanguard Russell 2000 ETF | 0.57% | 366K | $1.2M | +4,173 (+1.2%) | September 30, 2026 |
| 14 | Fidelity Enhanced Small Cap Core ETF | 0.49% | 314K | $1.0M | +657 (+0.2%) | September 30, 2026 |
| 15 | Fidelity Extended Market Index | 0.45% | 285K | $927,469 | −1,534 (−0.5%) | August 31, 2026 |
| 16 | Mackenzie GQE US Small Cap F8 | 0.32% | 202K | $657,858 | +47,735 (+30.9%) | July 31, 2026 |
| 17 | iShares Micro-Cap ETF | 0.31% | 198K | $642,957 | −1,364 (−0.7%) | September 30, 2026 |
| 18 | Fidelity® SAI Small-Mid Cap Momt Idx | 0.28% | 180K | $585,413 | +2,326 (+1.3%) | August 31, 2026 |
| 19 | IG Mackenzie GQE U.S. Sm Md Cap Eq C NL | 0.27% | 173K | $563,804 | +13,316 (+8.3%) | July 31, 2026 |
| 20 | Schwab Small Cap Index | 0.24% | 153K | $495,898 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
MGNX insider transactions
latest 2| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-08-20 | William K Heiden | Buy | $1.49 | 49,500 | $73,755 |
| 2025-08-19 | William K Heiden | Buy | $1.52 | 50,500 | $76,760 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
MGNX shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns MGNX
Institutional investors own 76.4% of MacroGenics's shares and insiders 3.49%. The largest holder is Armistice Capital, LLC with 7.86% of the shares (5.0M), as of June 30, 2026. Among the top 20 institutions, 13 added shares and 6 reduced their stake in the latest filings. Short interest is 11.45% of the float, or 12.63 days of average trading volume. The share count rose 114.7% since 2014.
Related: MGNX analyst forecast, MGNX key metrics. See the MGNX stock overview for the latest quote and news.
MGNX ownership FAQ
Who owns the most MacroGenics stock?
The largest shareholders of MacroGenics are Armistice Capital, LLC (7.86%), BlackRock Inc (7.35%), Vanguard Capital Management, LLC (4.17%), Renaissance Technologies Corp (4.13%), Acadian Asset Management LLC (3.99%).
What percentage of MacroGenics is owned by institutions?
Institutions hold 76.4% of MacroGenics's shares outstanding; insiders hold 3.49%.
Which funds own MacroGenics?
The largest fund holders of MacroGenics are Vanguard MStar Total Stk Mkt Idx Invest (3.02%), iShares Russell 2000 ETF (2.46%), Wasatch Ultra Growth (1.75%), Canada Life US Small-Mid Cap Growth F (1.42%), Wasatch Micro Cap (1.21%).
What is MacroGenics's short interest?
7.0M shares of MacroGenics were sold short, 11.45% of the float; at the average daily volume it would take 12.63 days to cover.
Are insiders buying or selling MacroGenics?
Of the latest 2 reported insider transactions in MacroGenics (since August 19, 2025), 2 were purchases and 0 were sales.
How many shares of MacroGenics are outstanding?
MacroGenics has 63.7M shares outstanding, of which 56.4M are in the public float.