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Novavax NVAX

US equityMarket cap rank #2749
$12.56 +$2.10 (+20.08%)
Pre-market · Oct 6, 7:40 am ET · After hours $12.45 -0.88%
Open$10.47
Prev close$10.46
Day range$10.28 – $13.39
Volume28.70M
Market cap$2.07B
P/E (TTM)–
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership71.4%-0.03 pts vs. prior quarter
Institutions holding308+1 vs. prior quarter
Insider trades (recent)41 buys / 6 sellsNet buying
Short interest30.24% of floatDays to cover 9.3 · as of 15 Sep 2026
Short-sale volume share19.8%5-day average of daily volume

Short-sale volume as % of daily volume

12%16%20%23%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$3.03M (11 inflow days, 9 outflow days).

The five largest holders on file together own 33.8% of shares outstanding.

Largest holders

  • Shah Capital Management, Inc8.59%
  • BlackRock8.46%
  • State Street Global Advisors7.12%
  • Vanguard Capital Management, LLC5.06%
  • Vanguard Portfolio Management, LLC4.61%
  • Sanofi4.17%
  • D. E. Shaw & Co., L.P.3.43%
  • Geode Capital Management, LLC2.55%

By investor type

  • Mutual Fund39.68%
  • Hedge Fund21.99%
  • Public Company8.44%
  • Private Company0.86%
  • Individual/Insider0.80%
  • Government Pension Fund0.35%
  • Family Office/Trust0.08%
  • Insurance Company0.01%

Reported short interest has risen from 27.86% to 30.24% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 49,875,210 30.2% 9.3
31 Aug 2026 48,784,134 29.6% 8.6
14 Aug 2026 47,494,355 28.8% 14.0
31 Jul 2026 45,659,491 27.8% 16.6
15 Jul 2026 43,821,227 26.6% 11.4
30 Jun 2026 45,809,886 27.9% 9.3

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