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AMPHASTAR PHARMACEUTICALS INC. 2024-2025 Proxy Voting Records

Compiled from SEC Form N-PX filings and AMPHASTAR PHARMACEUTICALS INC.’s Form 8-K, filed June 4, 2025 (Item 5.07 on EDGAR). Page generated October 18, 2026.

  • 7Ballot items
  • 293Asset managers
  • 2,213Fund votes
  • June 2, 2025Meeting date

Results at a glance

Meeting of June 2, 2025: 7 items on AMPHASTAR PHARMACEUTICALS INC.’s Form 8-K, filed June 4, 2025: 3 elected · 4 approved.

Material dissent

Material dissent: a director nominee under 80% of the votes cast, say-on-pay under 70%, any other item the board put forward under 80%, or a shareholder proposal with more than 50%, on the company’s own Form 8-K tally. How this is decided

Proxy season: 2023-2024 2024-2025 2025-2026

Explore AMPHASTAR PHARMACEUTICALS INC. in the interactive database Compare manager voting policies

Official 2024-2025 meeting results reported by AMPHASTAR PHARMACEUTICALS INC.

These tallies are AMPHASTAR PHARMACEUTICALS INC.’s own, as disclosed to the U.S. Securities and Exchange Commission on Form 8-K, filed June 4, 2025 (Item 5.07, “Submission of Matters to a Vote of Security Holders”). They cover every share voted at the meeting, not just the funds that file Form N-PX.

AMPHASTAR PHARMACEUTICALS INC. — official shareholder meeting results, meeting held June 2, 2025
Ballot itemForAgainst AbstainWithheldBroker non-votesSupport (of votes cast)Reported outcomeVoting standard
Elect Director: Jack Y. Zhang 35,324,6262,162,13513,140 --4,527,192 94%Elected—
Elect Director: Richard Prins 33,537,1013,949,66313,137 --4,527,192 89%Elected—
Elect Director: Diane G. Gerst 26,544,77410,942,68712,440 --4,527,192 71%Elected—
2. To ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for its fiscal year ending December 31, 2025 41,473,456526,23727,400 ---- 99%Approved—
3. To approve, on an advisory basis, the compensation of the Company's named executive officers 35,585,0001,815,52199,380 --4,527,192 95%Approved—
4. To approve the amendment of the Charter to reflect Delaware law provisions regarding officer exculpation; and 34,496,1442,910,87492,883 --4,527,192 92%Approved—
5. To approve the amendment of the Charter to remove forum selection provision 37,354,37452,33093,197 --4,527,192 99.8%Approved—

Source: AMPHASTAR PHARMACEUTICALS INC., Form 8-K, filed with the SEC on June 4, 2025 — read the filing on EDGAR.

How asset managers voted at the AMPHASTAR PHARMACEUTICALS INC. 2024-2025 meeting

Each item below shows how the 293 asset managers that disclosed a AMPHASTAR PHARMACEUTICALS INC. vote in their SEC Form N-PX filings actually voted. Share totals are the shares those managers' funds voted, summed across every fund they report.

1. Elect Director: Diane G. Gerst

Official resultDIRECTOR ELECTIONSReported outcome: Elected

Combines 3 wordings of this item as funds reported it.

71% Majority: yes · of votes cast

FOR 71%AGAINST
FOR: 26,544,774AGAINST: 10,942,687
Details: description as filed, official tally, votes by 86 asset managers

Description as filed by funds: To elect three Class III directors to serve until the Company's 2028 annual meeting of stockholders and until each such director's successor is elected and qualified or until such director's earlier death, resignation or removal: Diane G. Gerst

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“Elect Director: Diane G. Gerst”): 26,544,774 for, 10,942,687 against, per its Form 8-K filed June 4, 2025 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item.

Reported outcome: Elected, in the filing’s own words: “Election of Directors Each director nominee was duly elected to serve until the 2028 annual meeting of stockholders and until his or her successor is duly elected and qualified or until such director's earlier death, resignation or removal.”
Support: 71% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

The 86 asset managers below reported 9,697,649 for, 5,226,026 against, 3,844 abstained.

FORAGAINST
FOR: 9,697,649AGAINST: 5,226,026ABSTAIN: 3,844
Largest asset managers voting on “To elect three Class III directors to serve until the Company's 2028 annual meeting of stockholders and until ” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,365,2092,112 00For
Capitol Series Trust01,207,454 00Against
Fidelity882,6481,400 00For
Dimensional0735,338 00Against
State Street1,391680,079 00Against
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS0507,571 00Against
Pacer Funds Trust459,2170 00For
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century0300,676 00Against
Royce0244,045 00Against
Invesco0225,593 00Against
Goldman Sachs0130,576 00Against
Columbia Threadneedle0129,411 00Against
Equitable60,33247,000 00Mixed
Janus Detroit Street Trust0101,278 00Against
Prudential/PGIM34,15865,975 00Mixed
TIAA094,242 00Against
World Funds Trust90,0680 00For
Principal7085,626 00Against
Transamerica85,0190 00For
HOTCHKIS & WILEY FUNDS /DE/078,100 00Against
Brighthouse54,34615,100 3,8440Mixed

Showing the 25 largest of 86 asset managers. See all 86 in the interactive database.

2. Elect Director: Jack Y. Zhang

Official resultDIRECTOR ELECTIONSReported outcome: Elected

Combines 3 wordings of this item as funds reported it.

94% Majority: yes · of votes cast

FOR 94%
FOR: 35,324,626AGAINST: 2,162,135
Details: description as filed, official tally, votes by 86 asset managers

Description as filed by funds: To elect three Class III directors to serve until the Company's 2028 annual meeting of stockholders and until each such director's successor is elected and qualified or until such director's earlier death, resignation or removal: Jack Y. Zhang

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“Elect Director: Jack Y. Zhang”): 35,324,626 for, 2,162,135 against, per its Form 8-K filed June 4, 2025 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item.

Reported outcome: Elected, in the filing’s own words: “Election of Directors Each director nominee was duly elected to serve until the 2028 annual meeting of stockholders and until his or her successor is duly elected and qualified or until such director's earlier death, resignation or removal.”
Support: 94% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

The 86 asset managers below reported 14,014,153 for, 909,522 against, 3,844 abstained.

FOR
FOR: 14,014,153AGAINST: 909,522ABSTAIN: 3,844
Largest asset managers voting on “To elect three Class III directors to serve until the Company's 2028 annual meeting of stockholders and until ” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,367,3183 00For
Capitol Series Trust1,207,4540 00For
Fidelity884,0480 00For
Dimensional0735,338 00Against
State Street681,41852 00For
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS507,5710 00For
Pacer Funds Trust459,2170 00For
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century300,6760 00For
Royce244,0450 00For
Invesco225,5930 00For
Goldman Sachs114,78515,791 00Mixed
Columbia Threadneedle129,4110 00For
Equitable107,3320 00For
Janus Detroit Street Trust101,2780 00For
Prudential/PGIM29,30070,833 00Mixed
TIAA94,2420 00For
World Funds Trust90,0680 00For
Principal85,6960 00For
Transamerica85,0190 00For
HOTCHKIS & WILEY FUNDS /DE/78,1000 00For
Brighthouse69,4460 3,8440Mixed

Showing the 25 largest of 86 asset managers. See all 86 in the interactive database.

3. Elect Director: Richard Prins

Official resultDIRECTOR ELECTIONSReported outcome: Elected

Combines 3 wordings of this item as funds reported it.

89% Majority: yes · of votes cast

FOR 89%
FOR: 33,537,101AGAINST: 3,949,663
Details: description as filed, official tally, votes by 86 asset managers

Description as filed by funds: To elect three Class III directors to serve until the Company's 2028 annual meeting of stockholders and until each such director's successor is elected and qualified or until such director's earlier death, resignation or removal: Richard Prins

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“Elect Director: Richard Prins”): 33,537,101 for, 3,949,663 against, per its Form 8-K filed June 4, 2025 (Item 5.07). FOR was more than half of the votes cast. Whether the item passed is for the filing to say; its statement has not been read for this item.

Reported outcome: Elected, in the filing’s own words: “Election of Directors Each director nominee was duly elected to serve until the 2028 annual meeting of stockholders and until his or her successor is duly elected and qualified or until such director's earlier death, resignation or removal.”
Support: 89% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

The 86 asset managers below reported 13,158,417 for, 1,765,258 against, 3,844 abstained.

FOR
FOR: 13,158,417AGAINST: 1,765,258ABSTAIN: 3,844
Largest asset managers voting on “To elect three Class III directors to serve until the Company's 2028 annual meeting of stockholders and until ” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,367,3156 00For
Capitol Series Trust1,207,4540 00For
Fidelity884,0480 00For
Dimensional0735,338 00Against
State Street2,066679,404 00Against
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS507,5710 00For
Pacer Funds Trust459,2170 00For
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century300,6760 00For
Royce244,0450 00For
Invesco225,5930 00For
Goldman Sachs114,78515,791 00Mixed
Columbia Threadneedle0129,411 00Against
Equitable60,33247,000 00Mixed
Janus Detroit Street Trust101,2780 00For
Prudential/PGIM63,45836,675 00Mixed
TIAA94,2420 00For
World Funds Trust90,0680 00For
Principal85,6960 00For
Transamerica85,0190 00For
HOTCHKIS & WILEY FUNDS /DE/78,1000 00For
Brighthouse69,4460 3,8440Mixed

Showing the 25 largest of 86 asset managers. See all 86 in the interactive database.

4. 4. To approve the amendment of the Charter to reflect Delaware law provisions regarding officer exculpation; and

Official resultCORPORATE GOVERNANCEReported outcome: Approved

Combines 3 wordings of this item as funds reported it.

92% Approved · of votes cast

FOR 92%
FOR: 34,496,144AGAINST: 2,910,874
Details: description as filed, official tally, votes by 86 asset managers

Description as filed by funds: To approve the amendment of our Amended and Restated Certificate of Incorporation to reflect Delaware law provisions regarding officer exculpation; and

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“4. To approve the amendment of the Charter to reflect Delaware law provisions regarding officer exculpation; and”): 34,496,144 for, 2,910,874 against — passed, per its Form 8-K filed June 4, 2025 (Item 5.07).

Reported outcome: Approved, in the filing’s own words: “The stockholders approved the amendment to the Charter to reflect Delaware law provisions regarding officer exculpation.”
Support: 92% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

The 86 asset managers below reported 14,123,921 for, 768,254 against, 35,344 abstained.

FOR
FOR: 14,123,921AGAINST: 768,254ABSTAIN: 35,344
Largest asset managers voting on “To approve the amendment of our Amended and Restated Certificate of Incorporation to reflect Delaware law prov” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,365,2192,102 00For
Capitol Series Trust1,207,4540 00For
Fidelity884,0480 00For
Dimensional735,3380 00For
State Street681,189281 00For
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS507,5710 00For
Pacer Funds Trust0459,217 00Against
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century300,6760 00For
Royce244,0450 00For
Invesco225,5930 00For
Goldman Sachs130,5760 00For
Columbia Threadneedle129,4110 00For
Equitable107,3320 00For
Janus Detroit Street Trust101,2780 00For
Prudential/PGIM100,1330 00For
TIAA94,2420 00For
World Funds Trust090,068 00Against
Principal85,62670 00For
Transamerica32,21952,800 00Mixed
HOTCHKIS & WILEY FUNDS /DE/78,1000 00For
Brighthouse69,4460 3,8440Mixed

Showing the 25 largest of 86 asset managers. See all 86 in the interactive database.

5. 5. To approve the amendment of the Charter to remove forum selection provision

Official resultCORPORATE GOVERNANCEReported outcome: Approved

Combines 2 wordings of this item as funds reported it.

99.8% Approved · of votes cast

FOR 99.8%
FOR: 37,354,374AGAINST: 52,330
Details: description as filed, official tally, votes by 86 asset managers

Description as filed by funds: To approve the amendment of our Amended and Restated Certificate of Incorporation to remove forum selection provision.

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“5. To approve the amendment of the Charter to remove forum selection provision”): 37,354,374 for, 52,330 against — passed, per its Form 8-K filed June 4, 2025 (Item 5.07).

Reported outcome: Approved, in the filing’s own words: “Proposal 5: To approve the amendment of the Charter to remove forum selection provision;”
Support: 99.8% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

The 86 asset managers below reported 14,892,175 for, 0 against, 35,344 abstained.

FOR
FOR: 14,892,175AGAINST: 0ABSTAIN: 35,344
Largest asset managers voting on “To approve the amendment of our Amended and Restated Certificate of Incorporation to remove forum selection pr” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,367,3210 00For
Capitol Series Trust1,207,4540 00For
Fidelity884,0480 00For
Dimensional735,3380 00For
State Street681,4700 00For
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS507,5710 00For
Pacer Funds Trust459,2170 00For
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century300,6760 00For
Royce244,0450 00For
Invesco225,5930 00For
Goldman Sachs130,5760 00For
Columbia Threadneedle129,4110 00For
Equitable107,3320 00For
Janus Detroit Street Trust101,2780 00For
Prudential/PGIM100,1330 00For
TIAA94,2420 00For
World Funds Trust90,0680 00For
Principal85,6960 00For
Transamerica85,0190 00For
HOTCHKIS & WILEY FUNDS /DE/78,1000 00For
Brighthouse69,4460 3,8440Mixed

Showing the 25 largest of 86 asset managers. See all 86 in the interactive database.

6. 3. To approve, on an advisory basis, the compensation of the Company's named executive officers

Official resultFund totals may overlapSECTION 14A SAY-ON-PAY VOTESReported outcome: Approved

Combines 11 wordings of this item as funds reported it.

95% Approved · of votes cast

FOR 95%
FOR: 35,585,000AGAINST: 1,815,521
Details: description as filed, official tally, votes by 293 asset managers

Description as filed by funds: To approve, on an advisory basis, the compensation of the Company's named executive officers;

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“3. To approve, on an advisory basis, the compensation of the Company's named executive officers”): 35,585,000 for, 1,815,521 against — passed, per its Form 8-K filed June 4, 2025 (Item 5.07).

Reported outcome: Approved, in the filing’s own words: “The stockholders approved, on a non-binding basis, the compensation of the Company's named executive officers.”
Support: 95% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

Fund voting reports and institutional-manager reports both cover this item. An institutional manager can report shares that a fund it advises also reports, so the two are shown separately below and never added together, and their sum is not shown (fund and manager reports combined may count the same shares twice).

Fund voting reports: 86 asset managers voting on “To approve, on an advisory basis, the compensation of the Company's named executive officers;” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,365,2212,100 00For
Capitol Series Trust1,207,4540 00For
Fidelity884,0480 00For
Dimensional735,3380 00For
State Street681,231239 00For
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS0507,571 00Against
Pacer Funds Trust459,2170 00For
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century300,6760 00For
Royce244,0450 00For
Invesco225,5930 00For
Goldman Sachs130,5760 00For
Columbia Threadneedle129,4110 00For
Equitable107,3320 00For
Janus Detroit Street Trust101,2780 00For
Prudential/PGIM100,1330 00For
TIAA94,2420 00For
World Funds Trust90,0680 00For
Principal85,6960 00For
Transamerica85,0190 00For
HOTCHKIS & WILEY FUNDS /DE/78,1000 00For
Brighthouse69,4460 3,8440Mixed

Fund voting reports, all 86 managers: 14,340,340 for, 551,835 against, 35,344 abstained. Showing the 25 largest; see all in the interactive database.

Institutional-manager reports: 231 asset managers voting on “To approve, on an advisory basis, the compensation of the Company's named executive officers;” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
State Street1,419,10912,857 00For
FULLER & THALER ASSET MANAGEMENT, INC.1,253,4910 00For
Epoch Investment Partners, Inc.1,221,0450 00For
BlackRock1,136,27619,390 00For
GEODE CAPITAL MANAGEMENT, LLC963,2410 00For
MARSHALL WACE, LLP809,9030 00For
Federated Hermes585,1150 00For
T. Rowe Price550,6750 00For
Boston Trust Walden Co0495,076 00Against
Charles Schwab329,3260 00For
American Century302,5620 00For
Boston Partners286,0270 00For
Invesco280,9700 00For
Northern Trust261,9700 00For
HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC245,2500 00For
PARAMETRIC PORTFOLIO ASSOCIATES LLC0214,470 00Against
PRINCIPAL GLOBAL INVESTORS213,9500 00For
Goldman Sachs211,9560 00For
Renaissance169,4450 00For
MELLON INVESTMENTS Corp157,8250 00For
SYSTEMATIC FINANCIAL MANAGEMENT LP144,86812,945 00Mixed
NORDEA INVESTMENT MANAGEMENT AB0150,932 00Against
Granite Investment Partners, LLC142,4020 00For
Two Sigma138,8510 00For
Dimensional130,7480 00For

Institutional-manager reports, all 231 managers: 12,717,300 for, 1,103,874 against, 44,341 abstained, 375 not voted. Showing the 25 largest; see all in the interactive database.

7. 2. To ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for…

Official resultAUDIT-RELATEDReported outcome: Approved

Combines 4 wordings of this item as funds reported it.

99% Approved · of votes cast

FOR 99%
FOR: 41,473,456AGAINST: 526,237
Details: description as filed, official tally, votes by 87 asset managers

Description as filed by funds: To ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for its fiscal year ending December 31, 2025;

AMPHASTAR PHARMACEUTICALS INC.’s own tally for this item (“2. To ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for its fiscal year ending December 31, 2025”): 41,473,456 for, 526,237 against — passed, per its Form 8-K filed June 4, 2025 (Item 5.07).

Reported outcome: Approved, in the filing’s own words: “The stockholders ratified the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2025.”
Support: 99% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.

The 87 asset managers below reported 14,921,287 for, 2,402 against, 3,844 abstained.

FOR
FOR: 14,921,287AGAINST: 2,402ABSTAIN: 3,844
Largest asset managers voting on “To ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm ” at AMPHASTAR PHARMACEUTICALS INC., 2024-2025
Asset managerForAgainst AbstainWithheldVote
BlackRock4,056,7190 00For
Vanguard2,365,2232,098 00For
Capitol Series Trust1,207,4540 00For
Fidelity884,0480 00For
Dimensional735,3380 00For
State Street681,41852 00For
Federated Hermes585,1150 00For
BOSTON TRUST WALDEN FUNDS507,5710 00For
Pacer Funds Trust459,2170 00For
T. Rowe Price408,5090 00For
Charles Schwab307,0980 00For
American Century300,6760 00For
Royce244,0450 00For
Invesco225,5930 00For
Goldman Sachs130,5760 00For
Columbia Threadneedle129,4110 00For
Equitable107,3320 00For
Janus Detroit Street Trust101,2780 00For
Prudential/PGIM100,1330 00For
TIAA94,2420 00For
World Funds Trust90,0680 00For
Principal85,6960 00For
Transamerica85,0190 00For
HOTCHKIS & WILEY FUNDS /DE/78,1000 00For
Brighthouse69,4460 3,8440Mixed

Showing the 25 largest of 87 asset managers. See all 87 in the interactive database.

Largest AMPHASTAR PHARMACEUTICALS INC. shareholders voting in 2024-2025

Ranked separately for each type of Form N-PX report. An institutional manager can report shares that a fund it advises also reports, so the two tables can list the same shares and are never added together. Each is ranked by the shares voted on the item that the most managers of that type reported, shown as a share of the 47,670,177 shares outstanding at the time of that meeting.

Fund voting reports: top AMPHASTAR PHARMACEUTICALS INC. shareholders by shares voted on “To approve, on an advisory basis, the compensation of the Company's named executive officers;”, 2024-2025
#Asset manager % of shares outstanding
1BlackRock 8.51%
2Vanguard 4.97%
3Capitol Series Trust 2.53%
4Fidelity 1.85%
5Dimensional 1.54%
6State Street 1.43%
7Federated Hermes 1.23%
8BOSTON TRUST WALDEN FUNDS 1.06%
9Pacer Funds Trust 0.96%
10T. Rowe Price 0.86%
Institutional-manager reports: top AMPHASTAR PHARMACEUTICALS INC. shareholders by shares voted on “To approve, on an advisory basis, the compensation of the Company's named executive officers;”, 2024-2025
#Asset manager % of shares outstanding
1State Street 3.00%
2FULLER & THALER ASSET MANAGEMENT, INC. 2.63%
3Epoch Investment Partners, Inc. 2.56%
4BlackRock 2.42%
5GEODE CAPITAL MANAGEMENT, LLC 2.02%
6MARSHALL WACE, LLP 1.70%
7Federated Hermes 1.23%
8T. Rowe Price 1.16%
9Boston Trust Walden Co 1.04%
10Charles Schwab 0.69%

Reported AMPHASTAR PHARMACEUTICALS INC. holdings and ownership

As disclosed to the SEC in Form 13F (quarter-end holdings of 30 large managers), Schedules 13D and 13G (beneficial ownership above 5%) and the company’s own proxy statement (DEF 14A). Each row names its form.

AMPHASTAR PHARMACEUTICALS INC. holdings and ownership disclosed for the 2024-2025 proxy season
Holder % outstanding Disclosure
Jack Y. Zhang 26.27% 13G
Mary Z. Luo 26.18% DEF14A
Applied Physics & Chemistry Laboratories, Inc. 14.32% DEF14A
BlackRock 12.90% 13F
Vanguard Group 5.08% 13F
State Street 3.37% 13F
Dimensional Fund Advisors 2.85% 13F
Geode Capital 2.00% 13F
Millennium Management 1.82% 13F
Northern Trust 1.25% 13F

Percentages above are of 47,670,177 shares outstanding, as reported by AMPHASTAR PHARMACEUTICALS INC. on its Form 10-Q dated March 31, 2025 (see the filing on EDGAR). This is the count contemporaneous with the 2024-2025 meeting, not today’s. Each holding is as of its own filing, which may be dated before or after the meeting.

About this page

Every figure above is derived from filings made with the US Securities and Exchange Commission: Form N-PX, in which registered funds disclose how they voted every proxy and institutional managers disclose their votes on executive pay (say-on-pay, say-on-frequency and golden parachutes), and Form 8-K Item 5.07, in which the company reports its own meeting results. Shares outstanding are taken from AMPHASTAR PHARMACEUTICALS INC.’s 10-Q dated March 31, 2025. This page is a static snapshot rebuilt weekly on October 18, 2026; a live search always shows the current data.

At AMPHASTAR PHARMACEUTICALS INC.'s shareholder meeting held June 2, 2025, in the 2024-2025 proxy season, 293 asset managers reported how they voted on 7 ballot items in their SEC Form N-PX filings, covering 2,213 separate fund positions. On the most widely held item on that ballot — To approve, on an advisory basis, the compensation of the Company's named executive officers; — AMPHASTAR PHARMACEUTICALS INC.'s filing reports the proposal as approved, with 95% support of the votes cast (FOR divided by FOR plus AGAINST, the conventional basis for proxy support; abstentions, broker non-votes and unvoted shares are excluded because none of them took a side). Source: AMPHASTAR PHARMACEUTICALS INC.'s Form 8-K, Item 5.07, filed with the U.S. Securities and Exchange Commission on June 4, 2025.

AMPHASTAR PHARMACEUTICALS INC. proxy season coverage: 2023-2024 · 2024-2025 (this page) · 2025-2026.

Download data (CSV): ballot items · votes by manager · column guide.