Company · Ownership research

SUPERNUS PHARMACEUTICALS, INC. SUPN

CIK 0001356576 · CUSIP 868459108

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP 868459108 (SUPN), not CUSIP 868459958 (SUPN), CUSIP 868459908 (SUPN), and does not merge CUSIPs.

This page lists the top 20 of 334 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	BlackRock, Inc. CIK 2012383 · View history	$434.87M 9,350,046 shares	0.01%	+552.79K(+6.30%)Added	SEC filing ↗ Aug 7, 2026	▾
02	MILLENNIUM MANAGEMENT LLC CIK 1273087 · View history	$179.21M 3,853,212 shares	0.12%	+537.24K(+16.20%)Added	SEC filing ↗ Aug 14, 2026	▾
03	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · View history	$153.74M 3,305,429 shares	0.01%	+66.74K(+2.10%)Added	SEC filing ↗ Aug 13, 2026	▾
04	ARMISTICE CAPITAL, LLC CIK 1601086 · View history	$123.07M 2,646,201 shares	3.40%	+750.85K(+39.60%)Added	SEC filing ↗ Aug 14, 2026	▾
05	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · View history	$117.05M 2,516,721 shares	0.00%	+49.51K(+2.00%)Added	SEC filing ↗ Aug 13, 2026	▾
06	STATE STREET CORP CIK 93751 · View history	$114.41M 2,459,828 shares	0.00%	+171.70K(+7.50%)Added	SEC filing ↗ Aug 7, 2026	▾
07	NOMURA ASSET MANAGEMENT INTERNATIONAL INC. CIK 921739 · View history	$110.62M 2,378,329 shares	0.17%	+341.13K(+16.70%)Added	SEC filing ↗ Aug 14, 2026	▾
08	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$96.65M 2,078,090 shares	0.02%	-228.94K(-9.90%)Reduced	SEC filing ↗ Aug 11, 2026	▾
09	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$73.04M 1,570,088 shares	0.00%	-53.43K(-3.30%)Reduced	SEC filing ↗ Aug 12, 2026	▾
10	Stephens Investment Management Group LLC CIK 1314440 · View history	$69.11M 1,485,821 shares	0.74%	+134.49K(+10.00%)Added	SEC filing ↗ Jul 29, 2026	▾
11	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$68.75M 1,478,180 shares	0.09%	-227.04K(-13.30%)Reduced	SEC filing ↗ Aug 13, 2026	▾
12	LOOMIS SAYLES & CO L P CIK 312348 · View history	$68.61M 1,475,192 shares	0.09%	+49.41K(+3.50%)Added	SEC filing ↗ Aug 14, 2026	▾
13	CITADEL ADVISORS LLC CIK 1423053 · Amended · View history	$63.90M 1,373,982 shares	0.04%	-119.46K(-8.00%)Reduced	SEC filing ↗ Sep 2, 2026	▾
14	TWO SIGMA INVESTMENTS, LP CIK 1179392 · View history	$55.09M 1,184,378 shares	0.04%	+913.15K(+336.70%)Added	SEC filing ↗ Aug 14, 2026	▾
15	GW&K Investment Management, LLC CIK 1082917 · View history	$48.24M 1,037,242 shares	0.38%	-17.94K(-1.70%)Reduced	SEC filing ↗ Aug 12, 2026	▾
16	Sofinnova Investments, Inc. CIK 1631134 · View history	$48.20M 1,036,328 shares	2.57%	+82.02K(+8.60%)Added	SEC filing ↗ Aug 14, 2026	▾
17	Qube Research & Technologies Ltd CIK 1729829 · View history	$42.89M 922,166 shares	0.05%	+423.97K(+85.10%)Added	SEC filing ↗ Aug 14, 2026	▾
18	MORGAN STANLEY CIK 895421 · View history	$40.78M 876,841 shares	0.00%	-37.05K(-4.10%)Reduced	SEC filing ↗ Aug 13, 2026	▾
19	GOLDMAN SACHS GROUP INC CIK 886982 · View history	$38.11M 819,432 shares	0.00%	-37.05K(-4.30%)Reduced	SEC filing ↗ Aug 14, 2026	▾
20	D. E. Shaw & Co., Inc. CIK 1009207 · View history	$35.70M 767,668 shares	0.02%	+145.22K(+23.30%)Added	SEC filing ↗ Aug 14, 2026	▾

Showing 20 / 334 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

334

Cancelled or null records excluded

Disclosed shares

60,248,426

Not deduplicated across managers

Disclosed value

$2.80B

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.

SUPERNUS PHARMACEUTICALS, INC. · Q2 2026

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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.