Metsera, Inc.
Metsera, Inc. (MTSR) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · MTSR · as of Jun 8, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
2
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Metsera, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
MTSR insider buying and selling by quarter
MTSR insider selling · MTSR insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · MTSR ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
MTSR executive sell shares · MTSR board member insider trading · MTSR insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Nov 13, 2025 | FMR LLC 10 percent owner | Other | 2,230,450 | $22 | Form 4 |
| Nov 13, 2025 | ARCH Venture Partners XII, LLC Director | Other | 8,313,680 | $83 | Form 4 |
| Nov 13, 2025 | Marso Steven CHIEF MEDICAL OFFICER | Other | 17,000 | $0 | Form 4 |
| Nov 13, 2025 | BERNS PAUL L Director | Other | 957,559 | $10 | Form 4 |
| Nov 13, 2025 | Lang Matthew CHIEF LEGAL OFFICER | Other | 12,500 | $0 | Form 4 |
| Nov 13, 2025 | Population Health Partners GP, LLC 10 percent owner | Other | 12,639,787 | $126 | Form 4 |
| Nov 13, 2025 | Burow Kristina Director | Other | 8,313,680 | $83 | Form 4 |
| Nov 11, 2025 | Validae Health, L.P. 10 percent owner | Other | 12,767,462 | — | Form 4 |
| Nov 13, 2025 | Pinto Joshua Director | Other | 2,688 | $0 | Form 4 |
| Nov 13, 2025 | Stonehouse Jon P Director | Other | 2,688 | $0 | Form 4 |
| Nov 13, 2025 | Hubbard Brian CHIEF SCIENTIFIC OFFICER | Other | 17,000 | $0 | Form 4 |
| Nov 13, 2025 | Visioli Christopher CHIEF FINANCIAL OFFICER | Other | 21,250 | $0 | Form 4 |
| Nov 13, 2025 | MEANWELL CLIVE EXECUTIVE CHAIRMAN · Director | Other | 12,767,462 | $128 | Form 4 |
| Nov 13, 2025 | Bernard Christopher Whitten See Remarks · Director | Other | 12,767,462 | $128 | Form 4 |
| Nov 10, 2025 | FMR LLC 10 percent owner | Gift | 860,722 | — | Form 4 |
| Nov 3, 2025 | FMR LLC 10 percent owner | Other | 2,617,340 | — | Form 4 |
| Nov 3, 2025 | FMR LLC 10 percent owner | Other | 2,356,274 | — | Form 4 |
| Nov 3, 2025 | FMR LLC 10 percent owner | Sale | 193 | $12K | Form 4 |
| Nov 3, 2025 | FMR LLC 10 percent owner | Other | 47,843 | — | Form 4 |
| Nov 3, 2025 | FMR LLC 10 percent owner | Other | 2,115 | — | Form 4 |
| Nov 3, 2025 | FMR LLC 10 percent owner | Other | 2,356,081 | — | Form 4 |
| Oct 6, 2025 | FMR LLC 10 percent owner | Gift | 633,715 | — | Form 4 |
| Sep 2, 2025 | FMR LLC 10 percent owner | Other | 1,350,000 | — | Form 4 |
| Sep 2, 2025 | FMR LLC 10 percent owner | Other | 1,134,258 | — | Form 4 |
| Sep 2, 2025 | FMR LLC 10 percent owner | Other | 997,312 | — | Form 4 |
ARCH Venture Partners XII, LLC
Director
Date
Nov 13
Shares
8,313,680
Price
$0.00
Value
$83
Population Health Partners GP, LLC
10 percent owner
Date
Nov 13
Shares
12,639,787
Price
$0.00
Value
$126
Validae Health, L.P.
10 percent owner
Date
Nov 11
Shares
12,767,462
Price
—
Value
—
Hubbard Brian
CHIEF SCIENTIFIC OFFICER
Date
Nov 13
Shares
17,000
Price
$0.00
Value
$0
Visioli Christopher
CHIEF FINANCIAL OFFICER
Date
Nov 13
Shares
21,250
Price
$0.00
Value
$0
MEANWELL CLIVE
EXECUTIVE CHAIRMAN · Director
Date
Nov 13
Shares
12,767,462
Price
$0.00
Value
$128
Bernard Christopher Whitten
See Remarks · Director
Date
Nov 13
Shares
12,767,462
Price
$0.00
Value
$128
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About MTSR insider trading
MTSR insider trades
Metsera, Inc. (MTSR) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including FMR LLC (10 percent owner), ARCH Venture Partners XII, LLC (Director), Marso Steven (CHIEF MEDICAL OFFICER). Over the past 12 months, 5 insiders have filed transactions with the SEC. MTSR insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Metsera, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
MTSR insider trading · 5 questionsThe insiders of Metsera, Inc. (MTSR) include executives and directors such as FMR LLC (10 percent owner), ARCH Venture Partners XII, LLC (Director), Marso Steven (CHIEF MEDICAL OFFICER), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026