Janus Henderson Group PLC Amphastar Pharmaceuticals, Inc. Transaction History

Janus Henderson Group PLC

$207 Billion
Q3 2025

A detailed history of Janus Henderson Group PLC transactions in Amphastar Pharmaceuticals, Inc. stock. As of the latest transaction made, Janus Henderson Group PLC holds 16,868 shares of AMPH stock, worth $439,580. This represents 0.0% of its overall portfolio holdings.

Number of Shares

16,868

Previous 16,868 -0.0%

Holding current value

$439,580

Previous $387,000 16.02%

% of portfolio

0.0%

Previous 0.0%

17 transactions

Quarter	Operation	Price Per share	shares change	shares Held
Q2 2025 Aug 14, 2025	SELL	$22.96 - $28.29 $2.47 Million - $3.04 Million	-107,534 Reduced 86.44%	16,868 $387,000
Q1 2025 May 15, 2025	SELL	$26.24 - $38.48 $1.7 Million - $2.5 Million	-64,945 Reduced 34.3%	124,402 $3.61 Million
Q4 2024 Feb 14, 2025	BUY	$36.84 - $53.4 $1.56 Million - $2.26 Million	42,302 Added 28.77%	189,347 $7.03 Million
Q3 2024 Nov 14, 2024	SELL	$36.99 - $50.09 $341,010 - $461,779	-9,219 Reduced 5.9%	147,045 $7.14 Million
Q2 2024 Aug 14, 2024	SELL	$38.65 - $43.48 $113,399 - $127,570	-2,934 Reduced 1.84%	156,264 $6.25 Million

Q1 2024 May 15, 2024	SELL	$42.85 - $63.45 $257,100 - $380,700	-6,000 Reduced 3.63%	159,198 $6.99 Million
Q4 2023 Feb 14, 2024	BUY	$44.49 - $62.93 $2.34 Million - $3.31 Million	52,618 Added 46.74%	165,198 $10.2 Million
Q3 2023 Nov 14, 2023	BUY	$45.51 - $65.0 $705,632 - $1.01 Million	15,505 Added 15.97%	112,580 $5.18 Million
Q2 2023 Aug 14, 2023	SELL	$35.77 - $58.38 $245,596 - $400,837	-6,866 Reduced 6.61%	97,075 $5.58 Million
Q1 2023 May 15, 2023	BUY	$27.99 - $37.92 $2.69 Million - $3.65 Million	96,226 Added 1247.26%	103,941 $3.9 Million
Q4 2022 Feb 14, 2023	BUY	$27.93 - $31.27 $215,479 - $241,248	7,715 New	7,715 $216,000
Q3 2022 Nov 14, 2022	SELL	$27.56 - $37.75 $1,433 - $1,963	-52 Reduced 0.67%	7,715 $217,000
Q2 2022 Aug 15, 2022	SELL	$29.79 - $42.29 $10.6 Million - $15 Million	-355,737 Reduced 97.86%	7,767 $270,000
Q1 2022 May 16, 2022	SELL	$22.96 - $36.45 $14 Million - $22.2 Million	-609,689 Reduced 62.65%	363,504 $13 Million
Q4 2021 Feb 14, 2022	BUY	$18.14 - $23.29 $47,925 - $61,532	2,642 Added 0.27%	973,193 $22.7 Million
Q3 2021 Nov 16, 2021	BUY	$17.83 - $21.49 $7.41 Million - $8.93 Million	415,515 Added 74.86%	970,551 $18.5 Million
Q2 2021 Aug 16, 2021	BUY	$17.11 - $20.92 $9.5 Million - $11.6 Million	555,036 New	555,036 $11.2 Million

Others Institutions Holding AMPH

# of Institutions

262

Shares Held

33.5M

Call Options Held

73.4K

Put Options Held

12.6K

View Full List

About Amphastar Pharmaceuticals, Inc.

Ticker AMPH
Exchange NASDAQ
Sector Healthcare
Industry Drug Manufacturers—Specialty & Generic
Shares Outstandng 49,015,200
Market Cap $1.28B
Description
Amphastar Pharmaceuticals, Inc., a bio-pharmaceutical company, develops, manufactures, markets, and sells generic and proprietary injectable, inhalation, and intranasal products in the United States, China, and France. The company operates through two segments, Finished Pharmaceutical Products and API. It offers Primatene Mist, an over-the-count...

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Janus Henderson Group PLC Amphastar Pharmaceuticals, Inc. Transaction History