Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in OCS held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | EQT Fund Management S.a r.l. | 5.9M | $156.9M | 0.0% | 10.321% | 15.37% |
| 2 | Gildi - lifeyrissjodur | 2.4M | $64.3M | -0.7% | 4.251% | 32.62% |
| 3 | abrdn plc | 1.7M | $46.5M | 0.0% | 3.056% | 0.07% |
| 4 | Pivotal bioVenture Partners Investment Advisor LLC | 1.7M | $44.7M | -26.6% | 2.939% | 15.97% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | 1.3M | $35.8M | -0.8% | 2.354% | 0.01% |
| 6 | MILLENNIUM MANAGEMENT LLC | 913K | $24.3M | +5737.4% | 1.597% | 0.02% |
| 7 | ADAGE CAPITAL PARTNERS GP, L.L.C. | 833K | $22.2M | — | 1.457% | 0.03% |
| 8 | SR ONE CAPITAL MANAGEMENT, LP | 641K | $17.0M | 0.0% | 1.121% | 1.86% |
| 9 | Saturn V Capital Management LP | 517K | $13.7M | 0.0% | 0.904% | 2.49% |
| 10 | PERCEPTIVE ADVISORS LLC | 494K | $13.1M | 0.0% | 0.864% | 0.26% |
| 11 | EVENTIDE ASSET MANAGEMENT, LLC | 430K | $11.4M | — | 0.752% | 0.19% |
| 12 | Nan Fung Group Holdings Ltd | 351K | $9.3M | -31.9% | 0.613% | 7.69% |
| 13 | Alyeska Investment Group, L.P. | 331K | $8.8M | 0.0% | 0.580% | 0.02% |
| 14 | FOLKETRYGDFONDET | 320K | $8.5M | +74.8% | 0.559% | 0.15% |
| 15 | Woodline Partners LP | 201K | $5.3M | 0.0% | 0.352% | 0.02% |
| 16 | CITADEL ADVISORS LLC | 161K | $4.3M | -2.5% | 0.282% | 0.00% |
| 17 | NEXTBio Capital Management LP | 150K | $4.0M | -0.1% | 0.262% | 1.85% |
| 18 | Propel Bio Management, LLC | 122K | $3.3M | -29.3% | 0.214% | 2.07% |
| 19 | Compagnie Lombard Odier SCmA | 105K | $2.8M | -1.7% | 0.184% | 0.03% |
| 20 | ACUTA CAPITAL PARTNERS, LLC | 98K | $2.6M | -3.4% | 0.172% | 1.88% |
| 21 | JANE STREET GROUP, LLC | 90K | $2.4M | — | 0.158% | 0.02% |
| 22 | BANK OF AMERICA CORP /DE/ | 70K | $1.9M | +9.1% | 0.122% | 0.00% |
| 23 | GOLDMAN SACHS GROUP INC | 68K | $1.8M | — | 0.119% | 0.00% |
| 24 | Simplify Asset Management Inc. | 67K | $1.8M | -32.5% | 0.117% | 0.03% |
| 25 | MORGAN STANLEY | 66K | $1.8M | +2071.7% | 0.116% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in OCS — a direct measure of their conviction.
Filings activity in OCS during Q1 2026, grouped by how each filer changed its position.
Institutions that opened a new OCS position in Q1 2026
Institutions that fully closed their OCS position in Q1 2026
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 56 | +37% | 82.58% | +25.99 pp | $524M | +46% |
| Q4 2025 | 41 | +116% | 56.59% | +26.36 pp | $359M | +87% |
| Q3 2025 | 19 | 21% | 30.23% | +14.60 pp | $192M | +93% |
| Q2 2025 | 24 | +14% | 15.63% | +0.69 pp | $99M | +4.6% |
| Q1 2025 | 21 | +62% | 14.94% | +5.57 pp | $95M | +60% |
| Q4 2024 | 13 | +18% | 9.37% | +3.54 pp | $59M | +61% |
| Q3 2024 | 11 | 8.3% | 5.83% | 0.35 pp | $37M | 5.7% |
| Q2 2024 | 12 | — | 6.18% | — | $39M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying OCS stock.
Based on Q1 2026 13F filings, institutional ownership of Oculis Holding AG stands at 82.6%, held across 56 reporting institutions.
EQT Fund Management S.a r.l. is the largest reported institutional holder of OCS, with approximately 5,900,294 shares worth $0.16B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of OCS, including MILLENNIUM MANAGEMENT LLC, CITADEL ADVISORS LLC, JANE STREET GROUP, LLC.
Our composite Smart Money Score for OCS is 78 out of 100 (Bullish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
23 institutions opened new positions in OCS during Q1 2026, while 8 fully exited. 29 added to existing positions and 4 trimmed.
OCS institutional ownership rose by 25.99 percentage points quarter-over-quarter, with a net change of +15 holders.
The top 10 institutions account for 83.7% of all reported 13F value in OCS, and the top 25 account for 97.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Oculis Holding AG (OCS) Institutional Ownership