Shannon River Fund Management LLC: COHERENT CORP (COHR): Quarterly 13F Position History
As of Q1 2026, Shannon River Fund Management LLC reported 87,905 shares of COHERENT CORP (COHR), worth $20.9M and representing 4.0% of its 13F equity book. Quarter-over-quarter share count change: 80,013 (-47.7%) . The position first appeared in Q2 2025 and has been disclosed across 4 13F-HR filings in Pactolio's tracked window.
- 87,905Shares Held (Latest Filing)
- $20.9MReported Market Value (Latest Filing)
- 4.0%Portfolio Weight (% of 13F Equity Book)
- 80,013Quarter-over-Quarter Share Change
- -$10.1MQuarter-over-Quarter Value Change
- 445,440Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 4 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 87,905 | 80,013 | -47.7% | $20.9M | 4.0% | $238.2 |
| Q4 2025 | 167,918 | +78,662 | +88.1% | $31.0M | 4.9% | $184.6 |
| Q3 2025 | 89,256 | 356,184 | -80.0% | $9.6M | 1.5% | $107.7 |
| Q2 2025 | 445,440 | — | — | $39.7M | 6.1% | $89.2 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Shannon River Fund Management LLC first disclose a COHR position in 13F-HR filings?
Shannon River Fund Management LLC first reported COHERENT CORP (COHR) on its 13F-HR filing for the period ending 2025-06-30 (Q2 2025). The position has appeared on 4 reported quarters within Pactolio's tracked window.
What was Shannon River Fund Management LLC's most recent quarter-over-quarter share-count change in COHR?
Between Q4 2025 and Q1 2026, Shannon River Fund Management LLC reduced its COHR position by 80,013 shares (-47.7%), leaving 87,905 shares at a market value of $20.9M.
Does the implied price-per-share represent Shannon River Fund Management LLC's cost basis in COHR?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.