Among active 13F managers last quarter, 11 opened and 1 added, while 1 reduced; the largest holder to move was Davidson Kempner Capital Management LP (new position). Over the last 180 days, 2 insiders bought and none sold, a net +$35K in open-market trades.
Funds lean in and no leg opposes.
31 tracked 13F filers disclose a position in MNTS as of the latest SEC 13F filings, a combined $15.2M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Shares | Position value | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | Davidson Kempner Capital Management LP | 850K | $5.7M | ▲New +850K sh | Q2 2026 | |
| 2 | BlackRock, Inc. | 352K | $2.4M | ▲8k× Added · +351K sh | Q2 2026 | |
| 3 | Citadel Advisors LLC | 294K | $2.0M | ▲New +294K sh | Q2 2026 | |
| 4 | Weiss Asset Management LP | 179K | $1.2M | ▲New +179K sh | Q2 2026 | |
| 5 | Jefferies Financial Group Inc. | 146K | $981K | ▲New +146K sh | Q2 2026 | |
| 6 | Geode Capital Management, LLC | 119K | $798K | ▲+445% Added · +97K sh | Q2 2026 | |
| 7 | Vanguard Capital Management LLC | 116K | $778K | ▲52× Added · +114K sh | Q2 2026 | |
| 8 | State Street Corp | 74K | $498K | ▲New +74K sh | Q2 2026 | |
| 9 | Vanguard Fiduciary Trust Co | 54K | $365K | ▲20× Added · +52K sh | Q2 2026 | |
| 10 | Engineers Gate Manager LP | 15K | $103K | ▲New +15K sh | Q2 2026 | |
| 11 | Parisi Gray Wealth Management | 12K | $82K | ▲New +12K sh | Q2 2026 | |
| 12 | Pure Financial Advisors, LLC | 10K | $67K | ▲New +10K sh | Q2 2026 | |
| 13 | Legacy Capital Wealth Partners, LLC | 10K | $67K | ▲New +10K sh | Q2 2026 | |
| 14 | International Assets Investment Management, LLC | 10K | $65K | ▲New +10K sh | Q2 2026 | |
| 15 | UBS Group AG | 6K | $22K | ▼−89% Reduced · −50K sh | Q1 2026 | |
| 16 | Vanguard Global Advisers, LLC | 6K | $38K | ▲New +6K sh | Q2 2026 | |
| 17 | SBI Securities Co., Ltd. | 3K | $22K | ▲+531% Added · +3K sh | Q2 2026 | |
| 18 | Global Retirement Partners, LLC | 2K | $13K | ▲New +2K sh | Q2 2026 | |
| 19 | Tower Research Capital LLC (TRC) | 2K | $7K | ▼−1.7% Reduced · −32 sh | Q1 2026 | |
| 20 | Federation des caisses Desjardins du Quebec | 1K | $7K | ▲New +1K sh | Q2 2026 | |
| 21 | Larson Financial Group LLC | 700 | $5K | ▲New +700 sh | Q2 2026 | |
| 22 | FMR LLC | 600 | $4K | ▲New +600 sh | Q2 2026 | |
| 23 | Ameritas Advisory Services, LLC | 450 | $3K | ▲New +450 sh | Q2 2026 | |
| 24 | Lloyd Advisory Services, LLC. | 175 | $1K | ▲New +175 sh | Q2 2026 | |
| 25 | NewEdge Advisors, LLC | 125 | $840 | ▲Added Added · +125 sh | Q2 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 11 funds opened a new position in MNTS and 1 added to an existing one, while 1 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Their position there |
|---|---|---|
| Nvidia CorpNVDA | 13 funds | $4.6B |
| Micron Technology IncMU | 13 funds | $1.9B |
| Oracle CorpORCL | 13 funds | $779.6M |
| CVS Health CorpCVS | 13 funds | $543.2M |
| Comcast Corp-Class ACMCSA | 13 funds | $199.5M |
| Uber Technologies IncUBER | 13 funds | $132.6M |
| Amazon.com IncAMZN | 12 funds | $3.2B |
| Microsoft CorpMSFT | 12 funds | $1.8B |
| Alphabet Inc-CL AGOOGL | 12 funds | $1.5B |
| SS SPDR S&P 500 ETF Trust-USSPY | 12 funds | $1.4B |
| Eli Lilly & CoLLY | 12 funds | $1.3B |
| Space Exploration Techn-CL ASPCX | 12 funds | $1.2B |
Ranked by how many of MNTS's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in MNTS.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 21, 2026 | Hadfield Chris | Director | Buy (P) | 2K | $14K |
| May 20, 2026 | Kabot Brian | Director | Buy (P) | 250 | $1K |
| May 19, 2026 | Kabot Brian | Director | Buy (P) | 250 | $1K |
| May 15, 2026 | Kabot Brian | Director | Buy (P) | 2K | $10K |
| May 15, 2026 | Hadfield Chris | Director | Buy (P) | 2K | $8K |
| Dec 1, 2023 | Kabot Brian | Director | Sell (S) | 400 | $1K |
| Nov 1, 2023 | Kabot Brian | Director | Sell (S) | 400 | $1K |
| Oct 2, 2023 | Kabot Brian | Director | Sell (S) | 400 | $868 |
| Sep 26, 2023 | Momentus Pml Spv 2 Lp | 10% Owner | Sell (S) 5 lots, same day | 30K | $57K |
| Sep 25, 2023 | Momentus Pml Spv 2 Lp | 10% Owner | Sell (S) 5 lots, same day | 55K | $111K |
| Sep 22, 2023 | Momentus Pml Spv 2 Lp | 10% Owner | Sell (S) 5 lots, same day | 24K | $57K |
| Sep 14, 2023 | Sloss Dakin | 10% Owner | Sell (S) 5 lots, same day | 141K | $475K |
One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.
Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.
Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive
| Source | Buying | Selling | Net |
|---|---|---|---|
13F funds Top 100 holders by value, passive included; the hero counts active managers only | 6 | 2 | – |
Insiders Form 4 open-market | 2 | 0 | +$35K |
US House STOCK Act trades | 0 | 0 | $0 |
Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.
| Class | 13F holders | Value held |
|---|---|---|
| MNTSthis pageCommon Stock | 31 funds | $15.2M |
| 60879E119SPAC Combination | 10 funds | $17K |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for MNTS
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/MNTS/capital-change-brief"
Use Arkolith's capital_change_brief for MNTS. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for MNTS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.