Holdings of great value investors: 13Fs, overseas stakes a 13F misses, 5% stakes, insider buys
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The full record for one id from search (e.g. 'manager:berkshire-hathaway' or 'company:ko'), as text with its moatshark url.
An id from search results
Pick your client. Values in capitals, like YOUR_TOKEN, are yours to fill in.
Run in a terminal
claude mcp add --transport http moatshark https://www.moatshark.com/mcp
The full record for one id from search (e.g. 'manager:berkshire-hathaway' or 'company:ko'), as text with its moatshark url.
| Argument | Type | Description |
|---|---|---|
| id* | string | An id from search results |
{
"type": "object",
"required": [
"id"
],
"properties": {
"id": {
"type": "string",
"description": "An id from search results"
}
}
}When the managers file their 13Fs: the deadline for the quarter being filed, who has filed so far, who is expected on each remaining day (from each manager's last eight quarters), and who is later than usual. Give a slug for one manager's habit and history.
| Argument | Type | Description |
|---|---|---|
| slug | string | Optional manager slug, e.g. 'pershing-square' |
{
"type": "object",
"properties": {
"slug": {
"type": "string",
"description": "Optional manager slug, e.g. 'pershing-square'"
}
}
}Which value investors hold a company, how their holdings changed, its directors' recent share purchases and sales (Form 4), and basic SEC company facts.
| Argument | Type | Description |
|---|---|---|
| slug* | string | Company slug from search, usually the lower-case ticker, e.g. 'ko' |
{
"type": "object",
"required": [
"slug"
],
"properties": {
"slug": {
"type": "string",
"description": "Company slug from search, usually the lower-case ticker, e.g. 'ko'"
}
}
}Everything moatshark has on one value investor: its latest 13F (holdings, weights, change from the previous quarter), the overseas stakes a 13F never shows (from regulators in Japan, the UK, the Netherlands, France, Germany and Spain, with estimated values), its US funds' non-US holdings (N-PORT), 5% stake filings, Form 4 purchases since the 13F, and when it usually files.
| Argument | Type | Description |
|---|---|---|
| slug* | string | Manager slug from search, e.g. 'berkshire-hathaway' |
| limit | integer | Holdings to return (default 25, max 100) |
{
"type": "object",
"required": [
"slug"
],
"properties": {
"slug": {
"type": "string",
"description": "Manager slug from search, e.g. 'berkshire-hathaway'"
},
"limit": {
"type": "integer",
"description": "Holdings to return (default 25, max 100)"
}
}
}Open-market share purchases reported on Form 4 in the last 90 days: by the value investors themselves (as 10% owners) and by companies' own directors and officers.
No arguments.
{
"type": "object",
"properties": {}
}The newest 13F filings from the managers on moatshark, with each one's biggest buys and sales.
| Argument | Type | Description |
|---|---|---|
| limit | integer | Filings to return (default 15, max 60) |
{
"type": "object",
"properties": {
"limit": {
"type": "integer",
"description": "Filings to return (default 15, max 60)"
}
}
}What the managers owned, bought and sold in one quarter (from 2013 Q1). Omit the quarter for the latest one being filed.
| Argument | Type | Description |
|---|---|---|
| quarter | string | e.g. '2026-q2' |
{
"type": "object",
"properties": {
"quarter": {
"type": "string",
"description": "e.g. '2026-q2'"
}
}
}Find value investors (managers) and companies on moatshark by name, person or ticker. Returns slugs for get_manager and get_company, and results with ids for fetch.
| Argument | Type | Description |
|---|---|---|
| query* | string | Name, person or ticker, e.g. 'Buffett', 'Fundsmith', 'KO' |
{
"type": "object",
"required": [
"query"
],
"properties": {
"query": {
"type": "string",
"description": "Name, person or ticker, e.g. 'Buffett', 'Fundsmith', 'KO'"
}
}
}We read every tool's name, description and inputs the way the model will, looking for instructions hidden from you. A clean result means no warning signs, not a guarantee. Scanned Nov 4, 2026.