Rhenman & Partners Asset Management AB GKOS — GKOS

Ownership history in Rhenman & Partners Asset Management AB  ·  39 quarters on record

AI Ownership Summary

Rhenman & Partners Asset Management AB reported GKOS (GKOS) in 39 quarterly 13F filings from 2023 Q4 through 2025 Q4. Peak portfolio weight reached 3.07% in 2025 Q2. The latest visible filing shows GKOS at 2.22% 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 GKOS ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was Rhenman & Partners Asset Management AB's position in GKOS, 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

GKOS was reported at 2.22% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
3.07% in 2025 Q2

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

Time in book
Holding Window
2023 Q4 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.

GKOS stock page Rhenman & Partners Asset Management AB fund profile Rhenman & Partners Asset Management AB full holdings
How Rhenman & Partners Asset Management AB held GKOS — position size vs. price
% of Fund (quarterly)    GKOS price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 9 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2025 Q4 REDUCED 8.7% -4.7% ✅ 210,000 -20,000 -8.7% 2.22% $23.7M 2026-02-14 (Est.) $109.47
2025 Q3 REDUCED — — — 230,000 -5,000 -2.1% 2.08% $18.8M 2025-11-13 $91.81
2025 Q2 REDUCED 13.0% -21.3% ✅ 235,000 -35,000 -13.0% 3.07% $24.3M 2025-08-13 $91.79
2025 Q1 ADDED — — — 270,000 +233,469 +639.1% 3.05% $26.6M 2025-05-14 $91.57
2024 Q4 REDUCED 67.1% -34.4% ✅ 36,531 -74,469 -67.1% 0.56% $5.5M 2025-02-13 $146.38
2024 Q3 ADDED — — — 111,000 +61,000 +122.0% 1.17% $14.5M 2024-11-13 $143.25
2024 Q2 ADDED — — — 50,000 +23,000 +85.2% 0.57% $5.9M 2024-08-13 $121.38
2024 Q1 REDUCED 77.5% +24.5% ❌ 27,000 -93,000 -77.5% 0.24% $2.5M 2024-05-14 $110.97
2023 Q4 REDUCED 62.5% +17.1% ❌ 120,000 -200,000 -62.5% 0.95% $9.5M 2024-02-13 $93.57
30 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding GKOS

As of 2026 Q1 — sorted by position size

Taylor Frigon Capital Management LLC 3Y 7Y 1.44% RIVERBRIDGE PARTNERS LLC 3Y 7Y 1.14% EHRLICH FINANCIAL GROUP 0.62% HARBOR CAPITAL ADVISORS, INC. 3Y 0.23% TFB Advisors LLC 3Y 0.2% Quantum Private Wealth, LLC 3Y 0.11% KEYBANK NATIONAL ASSOCIATION/OH 3Y 7Y 0.06% Inspire Investing, LLC 3Y 7Y 0.05% Abel Hall, LLC 0.05% Louisiana State Employees Retirement System 3Y 7Y 0.05%

FAQ About Rhenman & Partners Asset Management AB and GKOS

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

How long has Rhenman & Partners Asset Management AB reported owning GKOS?

Rhenman & Partners Asset Management AB reported GKOS across 9 quarterly 13F filings, from 2023 Q4 through 2025 Q4.

What was the largest reported GKOS position in Rhenman & Partners Asset Management AB's portfolio?

The largest reported portfolio weight for GKOS was 3.07% in 2025 Q2.

What is the latest reported GKOS position on this page?

The most recent filing on this page is 2025 Q4, when Rhenman & Partners Asset Management AB reported 210,000 shares, equal to 2.22% of portfolio, with an estimated market value of $23.7M.

What does the chart on this GKOS ownership page compare?

The chart compares Rhenman & Partners Asset Management AB's quarterly GKOS 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 Rhenman & Partners Asset Management AB time their GKOS position?

Based on 13F filing dates vs. subsequent GKOS price moves, Rhenman & Partners Asset Management AB correctly timed 12 out of 34 reported position changes (35%). The annualised alpha on GKOS relative to SPY over the holding period was -1.3%.

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