Amphastar Pharmaceuticals, Inc. (AMPH) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

47,677,000Shares Outstanding
35,080,391Shares held by institutions
$661,967,008Value of institutional holdings
73.58%Institutional ownership %
8.23%Shares Changed QoQ
229No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Amphastar Pharmaceuticals, Inc. (NASDAQ:AMPH) showed up in the 13F filings of 229 institutional investors as of December 2025.

211 Institutional Holders

35,080,391 Total Shares Held
Download Data
Owner Name Date Shares Held Change (QoQ) Change (%) Value (USD)
BlackRock, Inc. 31 Mar, 2026 5,421,343 -40,672 -0.74% $106,204,108.00
DIMENSIONAL FUND ADVISORS LP 31 Mar, 2026 2,027,947 228,262 12.68% $39,726,234.00
State Street Corp 31 Mar, 2026 1,607,515 75,729 4.94% $31,491,219.00
VANGUARD CAPITAL MANAGEMENT LLC 31 Mar, 2026 1,543,655 1,543,655 0.00% $30,240,201.00
TD ASSET MANAGEMENT INC 31 Mar, 2026 1,541,044 -422,008 -21.50% $30,189,052.00
FULLER & THALER ASSET MANAGEMENT, INC. 31 Mar, 2026 1,395,139 -1,393,787 -49.98% $27,330,780.00
MARSHALL WACE, LLP 31 Mar, 2026 1,025,640 -211,644 -17.11% $20,092,287.00
AMERICAN CENTURY COMPANIES INC 31 Mar, 2026 1,017,538 352,202 52.94% $19,933,570.00
GEODE CAPITAL MANAGEMENT, LLC 31 Mar, 2026 976,650 89,825 10.13% $19,135,848.00
Boston Trust Walden Corp 31 Mar, 2026 944,789 -142,477 -13.10% $18,508,417.00
Epoch Investment Partners, Inc. 31 Mar, 2026 898,895 -227,690 -20.21% $17,609,353.00
VANGUARD PORTFOLIO MANAGEMENT LLC 31 Mar, 2026 787,816 787,816 0.00% $15,433,315.00
D. E. Shaw & Co., Inc. 31 Mar, 2026 665,542 108,476 19.47% $13,037,968.00
LSV ASSET MANAGEMENT 31 Mar, 2026 651,714 541,414 490.86% $12,767.00
Invesco Ltd. 31 Mar, 2026 604,774 103,370 20.62% $11,847,522.00
RENAISSANCE TECHNOLOGIES LLC 31 Mar, 2026 553,900 9,200 1.69% $10,850,901.00
SYSTEMATIC FINANCIAL MANAGEMENT LP 31 Mar, 2026 452,898 17,318 3.98% $8,872,287.00
Morgan Stanley 31 Mar, 2026 420,337 -171,294 -28.95% $8,234,414.00
UBS Group AG 31 Mar, 2026 420,263 163,639 63.77% $8,232,952.00
ROYCE & ASSOCIATES LP 31 Mar, 2026 406,175 53,878 15.29% $7,956,968.00