ARDSLEY ADVISORY PARTNERS LP COHR — COHERENT INC

Ownership history in ARDSLEY ADVISORY PARTNERS LP  ·  11 quarters on record

AI Ownership Summary

ARDSLEY ADVISORY PARTNERS LP reported COHERENT INC (COHR) in 11 quarterly 13F filings from 2024 Q1 through 2025 Q4. Peak portfolio weight reached 1.11% in 2025 Q1. The latest visible filing shows COHR at 0.14% of the fund.

This page tracks quarterly shares, estimated market value, portfolio weight, filing dates, and disclosure-aligned stock prices directly from SEC EDGAR 13F filings. Older history is available after unlock; the visible window still shows the most recent pattern.

What this COHR ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was ARDSLEY ADVISORY PARTNERS LP's position in COHERENT INC, and how did that conviction change over time? You can read the holding window, peak weight, latest reported size, disclosure timing, and quarter-by-quarter changes without piecing the story together from raw SEC rows.

Freshest filing
Latest Reported Filing
2025 Q4

COHR was reported at 0.14% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
1.11% in 2025 Q1

Peak weight helps separate a token disclosure from a real conviction holding the fund genuinely cared about.

Time in book
Holding Window
2024 Q1 to 2025 Q4

Longer holding windows often tell a very different story from short-lived tactical trades or one-quarter experiments.

Decision context
Why It Matters
Position size beats headlines

Knowing that a fund owned a stock is useful. Knowing whether it was a 0.20% placeholder or a true high-conviction position is where the signal actually starts.

COHR stock page ARDSLEY ADVISORY PARTNERS LP fund profile ARDSLEY ADVISORY PARTNERS LP full holdings
How ARDSLEY ADVISORY PARTNERS LP held COHR — position size vs. price
% of Fund (quarterly)    COHR price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 8 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 79.1% +29.1% ❌ 7,000 -26,500 -79.1% 0.14% $1.3M 2026-02-14 (Est.) $217.23
2025 Q3 REDUCED — — — 33,500 -500 -1.5% 0.45% $3.6M 2025-11-14 $139.33
2025 Q3 REDUCED 60.9% +75.5% ❌ 34,000 -53,000 -60.9% 0.45% $3.7M 2025-11-14 $139.33
2025 Q2 REDUCED — — — 87,000 -2,500 -2.8% 1.02% $7.8M 2025-08-14 $91.65
2025 Q1 ADDED — — — 89,500 +84,500 +1690.0% 1.11% $5.8M 2025-05-15 $78.82
2025 Q1 REDUCED 88.1% +37.4% ❌ 5,000 -37,000 -88.1% 0.06% $325K 2025-05-15 $78.82
2024 Q2 REDUCED 25.0% +22.7% ❌ 42,000 -14,000 -25.0% 0.45% $3.0M 2024-08-14 $66.99
2024 Q1 ADDED — — — 56,000 +46,000 +460.0% 0.49% $3.4M 2024-05-15 $57.08
3 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding COHR

As of 2026 Q1 — sorted by position size

AGMAN CAPITAL LLC 17.07% Q Fund Management (Hong Kong) Ltd 10.36% Broad Peak Investment Advisers Pte Ltd 5.43% WATERS PARKERSON & CO., LLC 3Y 7Y 5.06% UG Investment Advisers Ltd. 3Y 7Y 4.24% North Growth Management Ltd. 3Y 7Y 4.15% Capelight Capital Asset Management LP 3.55% JACKSON SQUARE CAPITAL, LLC 3Y 3.32% Steadtrust LLC 3.21% TICINO WEALTH 2.98%

FAQ About ARDSLEY ADVISORY PARTNERS LP and COHR

These are the practical questions this page is built to answer before you even open the full history table.

How long has ARDSLEY ADVISORY PARTNERS LP reported owning COHR?

ARDSLEY ADVISORY PARTNERS LP reported COHR across 8 quarterly 13F filings, from 2024 Q1 through 2025 Q4.

What was the largest reported COHR position in ARDSLEY ADVISORY PARTNERS LP's portfolio?

The largest reported portfolio weight for COHR was 1.11% in 2025 Q1.

What is the latest reported COHR position on this page?

The most recent filing on this page is 2025 Q4, when ARDSLEY ADVISORY PARTNERS LP reported 7,000 shares, equal to 0.14% of portfolio, with an estimated market value of $1.3M.

What does the chart on this COHR ownership page compare?

The chart compares ARDSLEY ADVISORY PARTNERS LP's quarterly COHR portfolio weight with the stock's indexed share price, so you can see whether the fund was building, trimming, or holding the position as price moved.

How well did ARDSLEY ADVISORY PARTNERS LP time their COHR position?

Based on 13F filing dates vs. subsequent COHR price moves, ARDSLEY ADVISORY PARTNERS LP correctly timed 6 out of 10 reported position changes (60%). The annualised alpha on COHR relative to SPY over the holding period was +169.2%.

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