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At MBX Biosciences, Inc.'s shareholder meeting held June 4, 2026, in the 2025-2026 proxy season, 54 asset managers reported how they voted on 3 ballot items in their SEC Form N-PX filings, covering 504 separate fund positions. On the most widely held item on that ballot — Election of two Class II Directors, each to serve until the Company's 2029 Annual Meeting of… — FOR was 81% of the votes cast (FOR divided by FOR plus WITHHELD, because this ballot offered only for and withhold; abstentions, broker non-votes and unvoted shares are excluded because none of them took a side), which is more than half. Whether the item was approved is for the filing to say; that statement has not been read for this item. Source: MBX Biosciences, Inc.'s Form 8-K, Item 5.07, filed with the U.S. Securities and Exchange Commission on June 5, 2026.
Download data (CSV): ballot items · votes by manager · column guide.
Compiled from SEC Form N-PX filings and MBX Biosciences, Inc.’s Form 8-K, filed June 5, 2026 (Item 5.07 on EDGAR). Page generated November 8, 2026.
Meeting of June 4, 2026: 3 items on MBX Biosciences, Inc.’s Form 8-K, filed June 5, 2026: 3 without a stated outcome.
None.
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: 2025-2026
Explore MBX Biosciences, Inc. in the interactive database Compare manager voting policies
These tallies are MBX Biosciences, Inc.’s own, as disclosed to the U.S. Securities and Exchange Commission on Form 8-K, filed June 5, 2026 (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.
| Ballot item | For | Against | Abstain | Withheld | Broker non-votes | Support (of votes cast) | Reported outcome | Voting standard |
|---|---|---|---|---|---|---|---|---|
| Elect Director: Patrick J. Heron | 35,007,623 | -- | -- | 4,579,129 | 4,130,833 | 88% | Not verified | — |
| Elect Director: Edward T. Mathers | 31,983,223 | -- | -- | 7,603,529 | 4,130,833 | 81% | Not verified | — |
| Company's stockholders approved Proposal 2 to ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026. | 43,713,693 | 1,946 | 1,946 | -- | -- | 99.9% | Not verified | — |
Source: MBX Biosciences, Inc., Form 8-K, filed with the SEC on June 5, 2026 — read the filing on EDGAR.
Each item below shows how the 54 asset managers that disclosed a MBX Biosciences, 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.
Combines 3 wordings of this item as funds reported it.
81% Majority: yes · of votes cast
Description as filed by funds: Election of two Class II Directors, each to serve until the Company's 2029 Annual Meeting of Stockholders or until such person's successor is duly elected and qualified, or until their earlier death, resignation or removal: Edward T. Mathers
MBX Biosciences, Inc.’s own tally for this item (“Elect Director: Edward T. Mathers”): 31,983,223 for, 7,603,529 withheld, per its Form 8-K filed June 5, 2026 (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: not verified — the filing’s own statement of the outcome could not be identified for this item.
Support: 81% of votes cast — FOR ÷ (FOR + WITHHELD); abstentions and broker non-votes are excluded.
The 54 asset managers below reported 7,424,753 for, 2,533,279 withheld, 10 abstained.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 3,554,598 | 0 | 0 | 10,110 | For |
| Vanguard | 1,745,054 | 0 | 10 | 1,110 | For |
| BlackRock | 0 | 0 | 0 | 1,586,851 | Withhold |
| MUTUAL FUND SERIES TRUST | 890,000 | 0 | 0 | 0 | For |
| T. Rowe Price | 743,200 | 0 | 0 | 0 | For |
| Charles Schwab | 215,162 | 0 | 0 | 0 | For |
| State Street | 238 | 0 | 0 | 198,998 | Withhold |
| DRIEHAUS MUTUAL FUNDS | 0 | 0 | 0 | 114,123 | Withhold |
| Hartford | 79,260 | 0 | 0 | 0 | For |
| Equitable | 11,965 | 0 | 0 | 64,841 | Mixed |
| TIAA | 74,135 | 0 | 0 | 0 | For |
| Victory Capital | 0 | 0 | 0 | 71,482 | Withhold |
| JPMorgan | 0 | 0 | 0 | 68,386 | Withhold |
| RBB FUND, INC. | 0 | 0 | 0 | 55,022 | Withhold |
| QUANTITATIVE MASTER SERIES LLC | 0 | 0 | 0 | 44,972 | Withhold |
| John Hancock | 37,033 | 0 | 0 | 7,663 | Mixed |
| ALPS ETF Trust | 0 | 0 | 0 | 36,550 | Withhold |
| Roundhill ETF Trust | 0 | 0 | 0 | 34,264 | Withhold |
| Dimensional | 0 | 0 | 0 | 27,914 | Withhold |
| AIG/SunAmerica | 0 | 0 | 0 | 25,646 | Withhold |
| Lincoln Financial | 0 | 0 | 0 | 24,727 | Withhold |
| Goldman Sachs | 24,309 | 0 | 0 | 0 | For |
| Brighthouse | 0 | 0 | 0 | 22,252 | Withhold |
| Brinker Capital Destinations Trust | 0 | 0 | 0 | 19,731 | Withhold |
| Advisor Managed Portfolios | 14,508 | 0 | 0 | 0 | For |
Showing the 25 largest of 54 asset managers. All 54 are in the interactive database (link above).
Combines 3 wordings of this item as funds reported it.
88% Majority: yes · of votes cast
Description as filed by funds: Election of two Class II Directors, each to serve until the Company's 2029 Annual Meeting of Stockholders or until such person's successor is duly elected and qualified, or until their earlier death, resignation or removal: Patrick J. Heron
MBX Biosciences, Inc.’s own tally for this item (“Elect Director: Patrick J. Heron”): 35,007,623 for, 4,579,129 withheld, per its Form 8-K filed June 5, 2026 (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: not verified — the filing’s own statement of the outcome could not be identified for this item.
Support: 88% of votes cast — FOR ÷ (FOR + WITHHELD); abstentions and broker non-votes are excluded.
The 54 asset managers below reported 9,242,012 for, 716,024 withheld, 6 abstained.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 3,564,708 | 0 | 0 | 0 | For |
| Vanguard | 1,745,058 | 0 | 6 | 1,110 | For |
| BlackRock | 1,586,851 | 0 | 0 | 0 | For |
| MUTUAL FUND SERIES TRUST | 890,000 | 0 | 0 | 0 | For |
| T. Rowe Price | 743,200 | 0 | 0 | 0 | For |
| Charles Schwab | 215,162 | 0 | 0 | 0 | For |
| State Street | 238 | 0 | 0 | 198,998 | Withhold |
| DRIEHAUS MUTUAL FUNDS | 0 | 0 | 0 | 114,123 | Withhold |
| Hartford | 79,260 | 0 | 0 | 0 | For |
| Equitable | 58,806 | 0 | 0 | 18,000 | Mixed |
| TIAA | 74,135 | 0 | 0 | 0 | For |
| Victory Capital | 0 | 0 | 0 | 71,482 | Withhold |
| JPMorgan | 68,386 | 0 | 0 | 0 | For |
| RBB FUND, INC. | 0 | 0 | 0 | 55,022 | Withhold |
| QUANTITATIVE MASTER SERIES LLC | 44,972 | 0 | 0 | 0 | For |
| John Hancock | 37,033 | 0 | 0 | 7,663 | Mixed |
| ALPS ETF Trust | 0 | 0 | 0 | 36,550 | Withhold |
| Roundhill ETF Trust | 0 | 0 | 0 | 34,264 | Withhold |
| Dimensional | 0 | 0 | 0 | 27,914 | Withhold |
| AIG/SunAmerica | 0 | 0 | 0 | 25,646 | Withhold |
| Lincoln Financial | 5,527 | 0 | 0 | 19,200 | Mixed |
| Goldman Sachs | 24,309 | 0 | 0 | 0 | For |
| Brighthouse | 11,619 | 0 | 0 | 10,633 | Mixed |
| Brinker Capital Destinations Trust | 0 | 0 | 0 | 19,731 | Withhold |
| Advisor Managed Portfolios | 14,508 | 0 | 0 | 0 | For |
Showing the 25 largest of 54 asset managers. All 54 are in the interactive database (link above).
99.9% Majority: yes · of votes cast
Description as filed by funds: RATIFICATION OF THE APPOINTMENT OF ERNST & YOUNG LLP AS THE COMPANY'S INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR THE FISCAL YEAR ENDING DECEMBER 31, 2026.
MBX Biosciences, Inc.’s own tally for this item (“The Company's stockholders approved Proposal 2 to ratify the appointment of Ernst & Young LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026.”): 43,713,693 for, 1,946 against, per its Form 8-K filed June 5, 2026 (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: not verified — the filing’s own statement of the outcome could not be identified for this item.
Support: 99.9% of votes cast — FOR ÷ (FOR + AGAINST); abstentions and broker non-votes are excluded.
The 54 asset managers below reported 9,958,042 for.
| Asset manager | For | Against | Abstain | Withheld | Vote |
|---|---|---|---|---|---|
| Fidelity | 3,564,708 | 0 | 0 | 0 | For |
| Vanguard | 1,746,175 | 0 | 0 | 0 | For |
| BlackRock | 1,586,851 | 0 | 0 | 0 | For |
| MUTUAL FUND SERIES TRUST | 890,000 | 0 | 0 | 0 | For |
| T. Rowe Price | 743,200 | 0 | 0 | 0 | For |
| Charles Schwab | 215,162 | 0 | 0 | 0 | For |
| State Street | 199,236 | 0 | 0 | 0 | For |
| DRIEHAUS MUTUAL FUNDS | 114,123 | 0 | 0 | 0 | For |
| Hartford | 79,260 | 0 | 0 | 0 | For |
| Equitable | 76,806 | 0 | 0 | 0 | For |
| TIAA | 74,135 | 0 | 0 | 0 | For |
| Victory Capital | 71,482 | 0 | 0 | 0 | For |
| JPMorgan | 68,386 | 0 | 0 | 0 | For |
| RBB FUND, INC. | 55,022 | 0 | 0 | 0 | For |
| QUANTITATIVE MASTER SERIES LLC | 44,972 | 0 | 0 | 0 | For |
| John Hancock | 44,696 | 0 | 0 | 0 | For |
| ALPS ETF Trust | 36,550 | 0 | 0 | 0 | For |
| Roundhill ETF Trust | 34,264 | 0 | 0 | 0 | For |
| Dimensional | 27,914 | 0 | 0 | 0 | For |
| AIG/SunAmerica | 25,646 | 0 | 0 | 0 | For |
| Lincoln Financial | 24,727 | 0 | 0 | 0 | For |
| Goldman Sachs | 24,309 | 0 | 0 | 0 | For |
| Brighthouse | 22,252 | 0 | 0 | 0 | For |
| Brinker Capital Destinations Trust | 19,731 | 0 | 0 | 0 | For |
| Advisor Managed Portfolios | 14,508 | 0 | 0 | 0 | For |
Showing the 25 largest of 54 asset managers. All 54 are in the interactive database (link above).
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 47,597,536 shares outstanding at the time of that meeting.
| # | Asset manager | % of shares outstanding |
|---|---|---|
| 1 | Fidelity | 7.49% |
| 2 | Vanguard | 3.67% |
| 3 | BlackRock | 3.33% |
| 4 | MUTUAL FUND SERIES TRUST | 1.87% |
| 5 | T. Rowe Price | 1.56% |
| 6 | Charles Schwab | 0.45% |
| 7 | State Street | 0.42% |
| 8 | DRIEHAUS MUTUAL FUNDS | 0.24% |
| 9 | Hartford | 0.17% |
| 10 | Equitable | 0.16% |
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.
| Holder | % outstanding | Disclosure |
|---|---|---|
| Patrick J. Heron | 14.02% | DEF14A |
| Entities affiliated with Frazier Life Sciences | 13.98% | DEF14A |
| FMR LLC | 11.18% | 13G |
| Frazier Life Sciences X, L.P. | 10.97% | 13D |
| Entities affiliated with OrbiMed Advisors LLC | 7.64% | DEF14A |
| Edward T. Mathers | 7.64% | DEF14A |
| Entities affiliated with New Enterprise Associates | 7.59% | DEF14A |
| Entities affiliated with Wellington Management Group LLP | 7.04% | DEF14A |
| Wellington Management | 6.71% | 13F |
| ORBIMED ADVISORS LLC | 6.46% | 13D |
Percentages above are of 47,597,536 shares outstanding, as reported by MBX Biosciences, Inc. on its Form 10-Q dated May 4, 2026 (see the filing on EDGAR). This is the count contemporaneous with the 2025-2026 meeting, not today’s. Each holding is as of its own filing, which may be dated before or after the meeting.
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 MBX Biosciences, Inc.’s 10-Q dated May 4, 2026. This page is a static snapshot rebuilt weekly on November 8, 2026; a live search always shows the current data.
MBX Biosciences, Inc. proxy season coverage: 2025-2026 (this page).
proxyvotesnow.com, “MBX Biosciences (MBX) 2026 Annual Meeting: Shareholder Vote Results”, https://proxyvotesnow.com/company/mbx-biosciences-inc/2026 (version of November 9, 2026). Derived from SEC Form N-PX and Form 8-K filings; tables licensed CC BY 4.0. Licence: CC BY 4.0.