Company · Ownership research

MACROGENICS INC MGNX

CIK 0001125345 · CUSIP 556099109

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 556099109 (MGNX), not CUSIP 556099909 (MGNX), CUSIP 556099959 (MGNX), and does not merge CUSIPs.

This page lists the top 20 of 109 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	ARMISTICE CAPITAL, LLC CIK 1601086 · View history	$17.37M 6,012,000 shares	0.57%	-312.00K(-4.90%)Reduced	SEC filing ↗ May 15, 2026	▾
02	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$8.56M 2,963,559 shares	0.01%	+54.93K(+1.90%)Added	SEC filing ↗ May 14, 2026	▾
03	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$8.08M 2,794,357 shares	0.01%	+819.88K(+41.50%)Added	SEC filing ↗ May 15, 2026	▾
04	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$7.67M 2,653,853 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
05	ACADIAN ASSET MANAGEMENT LLC CIK 916542 · View history	$7.35M 2,544,000 shares	0.01%	+25.59K(+1.00%)Added	SEC filing ↗ May 13, 2026	▾
06	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$7.31M 2,527,829 shares	0.01%	+1.53M(+152.90%)Added	SEC filing ↗ May 15, 2026	▾
07	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$6.94M 2,401,814 shares	0.00%	+564.09K(+30.70%)Added	SEC filing ↗ May 18, 2026	▾
08	MARSHALL WACE, LLP CIK 1318757 · View history	$5.85M 2,025,526 shares	0.01%	+740.96K(+57.70%)Added	SEC filing ↗ May 15, 2026	▾
09	RA CAPITAL MANAGEMENT, L.P. CIK 1346824 · View history	$5.39M 1,864,176 shares	0.06%	+1.86MNew	SEC filing ↗ May 15, 2026	▾
10	WASATCH ADVISORS LP CIK 814133 · View history	$4.51M 1,559,701 shares	0.03%	-226.66K(-12.70%)Reduced	SEC filing ↗ Apr 21, 2026	▾
11	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$3.49M 1,208,775 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
12	BlackRock, Inc. CIK 2012383 · View history	$3.36M 1,163,146 shares	0.00%	+10.50K(+0.90%)Added	SEC filing ↗ May 13, 2026	▾
13	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$3.06M 1,058,424 shares	0.00%	+301.78K(+39.90%)Added	SEC filing ↗ May 15, 2026	▾
14	Connor, Clark & Lunn Investment Management Ltd. CIK 1596800 · View history	$2.51M 867,249 shares	0.01%	+48.43K(+5.90%)Added	SEC filing ↗ May 11, 2026	▾
15	CITADEL ADVISORS LLC CIK 1423053 · View history	$2.26M 782,618 shares	0.00%	-252.53K(-24.40%)Reduced	SEC filing ↗ May 15, 2026	▾
16	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$2.02M 697,321 shares	0.00%	+42.02K(+6.40%)Added	SEC filing ↗ May 15, 2026	▾
17	JANE STREET GROUP, LLC CIK 1595888 · View history	$1.76M 608,509 shares	0.00%	-646.41K(-51.50%)Reduced	SEC filing ↗ May 12, 2026	▾
18	DIADEMA PARTNERS LP CIK 2026172 · View history	$1.73M 600,000 shares	0.72%	+600.00KNew	SEC filing ↗ May 15, 2026	▾
19	MACKENZIE FINANCIAL CORP CIK 919859 · View history	$1.73M 597,442 shares	0.00%	+389.56K(+187.40%)Added	SEC filing ↗ May 13, 2026	▾
20	Affinity Asset Advisors, LLC CIK 1773195 · View history	$1.45M 500,000 shares	0.08%	+15.69K(+3.20%)Added	SEC filing ↗ May 14, 2026	▾

Showing 20 / 109 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

109

Cancelled or null records excluded

Disclosed shares

43,169,311

Not deduplicated across managers

Disclosed value

$124.75M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

MACROGENICS INC · Q1 2026

Explore all 109 reporting institutions.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.