Clearfield, Inc. CLFD
CIK 0000796505 · CUSIP 18482P103
Quarter-end disclosures, not live holdings.
Top 20 institutions
Weight means this stock's share of the manager's own portfolio.
| # | Manager | Value | Manager weight | Change vs prior | Source | |
|---|---|---|---|---|---|---|
| 01 | BlackRock, Inc. CIK 2012383 · View history | $30.75M 1,034,793 shares | 0.00% | -4.73K(-0.50%)Reduced | SEC filing ↗ May 2, 2025 | ▾ |
| 02 | VANGUARD GROUP INC CIK 102909 · View history | $28.30M 952,059 shares | 0.00% | +7.92K(+0.80%)Added | SEC filing ↗ May 9, 2025 | ▾ |
| 03 | MAIRS & POWER INC CIK 1070134 · View history | $25.33M 852,220 shares | 0.26% | +433.01K(+103.30%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 04 | ACK Asset Management LLC CIK 1510940 · View history | $20.42M 687,200 shares | 3.35% | -32.80K(-4.60%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 05 | ROYCE & ASSOCIATES LP CIK 906304 · View history | $14.41M 485,009 shares | 0.16% | +6.20K(+1.30%)Added | SEC filing ↗ May 6, 2025 | ▾ |
| 06 | DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history | $10.10M 339,981 shares | 0.00% | +17.60K(+5.50%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 07 | STATE STREET CORP CIK 93751 · View history | $8.96M 301,318 shares | 0.00% | -6.12K(-2.00%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 08 | Newtyn Management, LLC CIK 1569241 · View history | $8.92M 300,000 shares | 1.41% | -117.57K(-28.20%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 09 | GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history | $8.60M 289,322 shares | 0.00% | +5.55K(+2.00%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 10 | ROYAL BANK OF CANADA CIK 1000275 · Amended · View history | $8.02M 269,865 shares | 0.00% | +15.66K(+6.20%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 11 | JPMORGAN CHASE & CO CIK 19617 · View history | $7.43M 249,849 shares | 0.00% | +205.60K(+464.60%)Added | SEC filing ↗ May 12, 2025 | ▾ |
| 12 | MARSHALL WACE, LLP CIK 1318757 · View history | $5.58M 187,684 shares | 0.01% | +12.92K(+7.40%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 13 | PUNCH & ASSOCIATES INVESTMENT MANAGEMENT, INC. CIK 1238990 · View history | $5.26M 177,000 shares | 0.34% | -79.00K(-30.90%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 14 | Select Equity Group, L.P. CIK 1592643 · View history | $5.24M 176,304 shares | 0.02% | +156.04K(+770.20%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 15 | CITADEL ADVISORS LLC CIK 1423053 · View history | $5.23M 175,808 shares | 0.01% | +99.37K(+130.00%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 16 | NORTHERN TRUST CORP CIK 73124 · View history | $3.65M 122,861 shares | 0.00% | -2.82K(-2.20%)Reduced | SEC filing ↗ May 13, 2025 | ▾ |
| 17 | Dana Investment Advisors, Inc. CIK 1427514 · View history | $3.38M 113,600 shares | 0.12% | -2.93K(-2.50%)Reduced | SEC filing ↗ May 15, 2025 | ▾ |
| 18 | D. E. Shaw & Co., Inc. CIK 1009207 · View history | $3.28M 110,241 shares | 0.00% | +51.78K(+88.60%)Added | SEC filing ↗ May 15, 2025 | ▾ |
| 19 | UBS Group AG CIK 1610520 · View history | $2.87M 96,409 shares | 0.00% | +14.99K(+18.40%)Added | SEC filing ↗ May 13, 2025 | ▾ |
| 20 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC CIK 884546 · Amended · View history | $2.85M 95,825 shares | 0.00% | +4.29K(+4.70%)Added | SEC filing ↗ Sep 15, 2025 | ▾ |
Showing 20 / 130 institutions. The complete set is available through the API.
Coverage & totals by quarter
Reporting institutions by quarter
Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.
Explore all 130 reporting institutions.
This page includes 20 of 130 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.
- Download CSV
- Earlier quarters
- Advanced screening & filtering
- API & AI access
+ New accounts get free API credits to explore data beyond ownership filings.
For AI agents & developers
The initial HTML of this page carries its exact data as script#research-data (JSON): values, units, scope, preview limits and SEC sources. Read it directly, no script or API key needed; script#research-access says what needs an account. This page lists 20 of 130 reporting institutions; totals use the complete disclosed data.
Without an account: the last 3 years, with the row caps stated on the page. A free account opens all history on file on these pages and the CSV of what a page shows. Rows beyond the caps and bulk retrieval go through the authenticated API / MCP / CLI.
MCP https://api.akkrudata.ai/mcp
akkru_institutional_holdings
{"action":"holders","cusip":"18482P103","quarter":"2025Q1","type":"positions","page_size":100}Connect to MCP with OAuth and follow the returned pagination. Credits and usage limits depend on the account.
- MCP endpoint
- https://api.akkrudata.ai/mcp
- API / MCP / CLI documentation
- /documents
- llms.txt
- /llms.txt
Sources, coverage & how to read this data
Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.