UBS Group AG CTSO — CYTOSORBENTS CORP

Ownership history in UBS Group AG  ·  40 quarters on record

AI Ownership Summary

UBS Group AG reported CYTOSORBENTS CORP (CTSO) in 40 quarterly 13F filings from 2023 Q4 through 2026 Q1. The latest visible filing shows CTSO at 0.00% 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 CTSO ownership page tells you

This page is designed to answer the real investor question behind a 13F filing: how meaningful was UBS Group AG's position in CYTOSORBENTS CORP, 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
2026 Q1

CTSO was reported at 0.00% of portfolio in the most recent visible filing.

High-water mark
Peak Conviction
0.0% 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 2026 Q1

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.

CTSO stock page UBS Group AG fund profile UBS Group AG full holdings
How UBS Group AG held CTSO — position size vs. price
% of Fund (quarterly)    CTSO price (quarter-end, indexed to 100)    SPY (indexed to 100)    QQQ (indexed to 100)
📋 Quarterly Holdings History 10 quarters  ▾
Quarter Action Sold % After 3M Timing Shares Change Chg % % of Fund Mkt Value Filed Price (Filed)
2026 Q1 REDUCED — — — 115,200 -72 -0.1% 0.00% $65K 2026-05-05 $0.61
2025 Q4 ADDED — — — 115,272 +69 +0.1% 0.00% $74K 2026-01-29 $0.66
2025 Q3 REDUCED 5.8% -29.0% ✅ 115,203 -7,129 -5.8% 0.00% $108K 2025-11-13 $0.67
2025 Q2 ADDED — — — 122,332 +7,132 +6.2% 0.00% $157K 2025-08-14 $1.14
2025 Q1 REDUCED 20.5% +28.0% ❌ 115,200 -29,725 -20.5% 0.00% $115K 2025-05-13 $0.87
2024 Q4 ADDED — — — 144,925 +142,354 +5536.9% 0.00% $132K 2025-02-14 $1.30
2024 Q3 ADDED — — — 2,571 +714 +38.4% 0.00% $4K 2024-11-14 $0.95
2024 Q2 ADDED — — — 1,857 +1,800 +3157.9% 0.00% $1K 2024-08-14 $0.97
2024 Q1 REDUCED 98.1% -26.3% ✅ 57 -2,904 -98.1% 0.00% $54 2024-05-13 $0.83
2023 Q4 ADDED — — — 2,961 +2,764 +1403.0% 0.00% $3K 2024-02-09 $1.02
30 older quarters hidden  —  Sign in free or upgrade to Premium to see full history

🏢 Other funds also holding CTSO

As of 2026 Q1 — sorted by position size

Skylands Capital, LLC 3Y 7Y 0.13% Key Client Fiduciary Advisors, LLC 3Y 0.02% NWF Advisory Services Inc. 0.01% Seelaus Asset Management LLC 3Y 7Y 0.01% RITHOLTZ WEALTH MANAGEMENT 3Y 7Y 0.0% Merit Financial Group, LLC 3Y 7Y 0.0% Kestra Advisory Services, LLC 3Y 0.0% Your Advocates Ltd., LLP 3Y 0.0% Medallion Wealth Advisors, LLC 0.0% LPL Financial LLC 3Y 7Y 0.0%

FAQ About UBS Group AG and CTSO

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

How long has UBS Group AG reported owning CTSO?

UBS Group AG reported CTSO across 10 quarterly 13F filings, from 2023 Q4 through 2026 Q1.

What was the largest reported CTSO position in UBS Group AG's portfolio?

The largest reported portfolio weight for CTSO was 0.00% in 2025 Q2.

What is the latest reported CTSO position on this page?

The most recent filing on this page is 2026 Q1, when UBS Group AG reported 115,200 shares, equal to 0.00% of portfolio, with an estimated market value of $65K.

What does the chart on this CTSO ownership page compare?

The chart compares UBS Group AG's quarterly CTSO 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 UBS Group AG time their CTSO position?

Based on 13F filing dates vs. subsequent CTSO price moves, UBS Group AG correctly timed 20 out of 39 reported position changes (51%). The annualised alpha on CTSO relative to SPY over the holding period was -30.2%.

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