Clearfield, Inc.
CLFD- Exchange
- Nasdaq
- Industry
- Telephone & Telegraph Apparatus
- SEC CIK
- 0000796505
In the last 90 days, Clearfield, Inc. insiders filed 0 open-market purchases and 1 sale; 125 institutions reported holding it in 13F filings for Q2 2026, worth $347.6M in total; no superinvestor holds it.
Holders of 5% or more of CLFD
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Clearfield, Inc., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Roth Ronald G | 13G/A | 10.50%1.46M shares | +0.30 ppfrom 10.20% | Feb 12, 20252 filings | Feb 13, 2026 | SEC |
| Hirschman Orin | 13G | 7.40%1.01M shares | New | Jul 27, 20261 filing | Jul 27, 2026 | SEC |
| Mairs & Power Inc | 13G | 6.03%852.3K shares | New | May 15, 20251 filing | May 15, 2025 | SEC |
| ACK Asset Management LLC | 13G | 5.10%710.2K shares | +0.20 ppfrom 4.90% | Feb 14, 20253 filings | Apr 15, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
8 Schedule 13D and 13G filings on Clearfield, Inc., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Jul 27, 20264:05 PM ET | Hirschman Orinand 1 other | 13G | 7.40%1.01M shares | New | Jun 30, 2026 | SEC |
| Apr 15, 20261:07 PM ET | ACK Asset Management LLCand 2 others | 13G | 5.10%710.2K shares | +0.20 ppfrom 4.90% | Feb 20, 2026 | SEC |
| Mar 26, 20265:16 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 13, 202611:01 AM ET | Roth Ronald G | 13G/A | 10.50%1.46M shares | +0.30 ppfrom 10.20% | Dec 31, 2025 | SEC |
| May 15, 20253:56 PM ET | Mairs & Power Inc | 13G | 6.03%852.3K shares | New | Mar 31, 2025 | SEC |
| May 13, 20255:28 PM ET | ACK Asset Management LLCand 2 others | 13G/A | 4.90%687.2K shares | −0.14 ppfrom 5.04%Below 5% | Mar 31, 2025 | SEC |
| Feb 14, 202512:46 PM ET | ACK Asset Management LLCand 2 others | 13G | 5.04%720.0K shares | New | Dec 31, 2024 | SEC |
| Feb 12, 20252:01 PM ET | Roth Ronald G | 13G/A | 10.20%1.44M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Clearfield, Inc. shares.
No Form 144 notices for Clearfield, Inc. are on file.