318 tracked 13F filers disclose a position in OSIS as of the latest SEC 13F filings, a combined $4.5B in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
| # | Fund | Position value | Shares | Last move | As of | History |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | $671.6M | 2.5M | ▼−1.3% Reduced · −32K sh | Q1 2026 | |
| 2 | FMR LLC | $522.3M | 2.0M | ▲+19% Added · +310K sh | Q1 2026 | |
| 3 | VANGUARD PORTFOLIO MANAGEMENT LLC | $331.8M | 1.2M | →First observed position No prior filed position | Q1 2026 | |
| 4 | JANUS HENDERSON GROUP PLC | $205.1M | 772K | ▲+2.6% Added · +20K sh | Q1 2026 | |
| 5 | VANGUARD CAPITAL MANAGEMENT LLC | $185.7M | 699K | →First observed position No prior filed position | Q1 2026 | |
| 6 | STATE STREET CORP | $147.4M | 674K | ▲+1.8% Added · +12K sh | Q2 2026 | |
| 7 | Mawer Investment Management Ltd. | $175.9M | 663K | ▼−18% Reduced · −141K sh | Q1 2026 | |
| 8 | GEODE CAPITAL MANAGEMENT, LLC | $101.4M | 464K | ▲+5.2% Added · +23K sh | Q2 2026 | |
| 9 | Channing Capital Management, LLC | $94.7M | 433K | ▲+62% Added · +166K sh | Q2 2026 | |
| 10 | UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AME | $114.3M | 431K | ▼−14% Reduced · −68K sh | Q1 2026 | |
| 11 | Hood River Capital Management LLC | $90.6M | 414K | ▲+11% Added · +42K sh | Q2 2026 | |
| 12 | DIMENSIONAL FUND ADVISORS LP | $105.0M | 395K | ▼−2.8% Reduced · −11K sh | Q1 2026 | |
| 13 | WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | $83.0M | 379K | ▲+121% Added · +208K sh | Q2 2026 | |
| 14 | Neuberger Berman Group LLC | $80.7M | 304K | ▲+1.0% Added · +3K sh | Q1 2026 | |
| 15 | BANK OF AMERICA CORP /DE/ | $70.7M | 266K | ▼−6.9% Reduced · −20K sh | Q1 2026 | |
| 16 | PRICE T ROWE ASSOCIATES INC /MD/ | $68.9M | 260K | ▲+1.8% Added · +4K sh | Q1 2026 | |
| 17 | PRIMECAP MANAGEMENT CO/CA/ | $65.0M | 245K | ▼−8.6% Reduced · −23K sh | Q1 2026 | |
| 18 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | $61.6M | 232K | ▲+43% Added · +69K sh | Q1 2026 | |
| 19 | NEUMEIER POMA INVESTMENT COUNSEL LLC | $48.7M | 223K | ▲+16% Added · +31K sh | Q2 2026 | |
| 20 | SYSTEMATIC FINANCIAL MANAGEMENT LP | $58.2M | 219K | ▼−6.0% Reduced · −14K sh | Q1 2026 | |
| 21 | Clark Capital Management Group, Inc. | $47.9M | 219K | ▼−19% Reduced · −52K sh | Q2 2026 | |
| 22 | MORGAN STANLEY | $55.9M | 210K | ▼−5.6% Reduced · −13K sh | Q1 2026 | |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | $53.4M | 201K | ▼−0.5% Reduced · −1K sh | Q1 2026 | |
| 24 | LOOMIS SAYLES & CO L P | $50.8M | 191K | ▼−7.7% Reduced · −16K sh | Q1 2026 | |
| 25 | VAN ECK ASSOCIATES CORP | Withheld | 188K | ▼−17% Reduced · −39K sh | Q1 2026 |
Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.
Last quarter, 5 funds opened a new position in OSIS and 26 added to an existing one, while 20 reduced and 0 exited entirely — based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).
| Company | Co-held by | Combined value |
|---|---|---|
| MICROSOFT CORPMSFT | 171 funds | $232.7B |
| AMAZON.COM INCAMZN | 167 funds | $173.2B |
| ALPHABET INC-CL AGOOGL | 163 funds | $146.7B |
| META PLATFORMS INC-CLASS AMETA | 163 funds | $104.9B |
| NVIDIA CORPNVDA | 162 funds | $343.4B |
| APPLE INCAAPL | 161 funds | $247.2B |
| JPMORGAN CHASE & COJPM | 160 funds | $55.6B |
| VISA INC-CLASS A SHARESV | 158 funds | $57.1B |
| COSTCO WHOLESALE CORPCOST | 156 funds | $30.6B |
| BROADCOM INCAVGO | 155 funds | $132.8B |
| ALPHABET INC-CL CGOOG | 155 funds | $110.7B |
| ELI LILLY & COLLY | 155 funds | $73.3B |
Ranked by how many of OSIS's institutional holders also hold each name, a cross-fund conviction signal.
| Date | Insider | Role | Action | Shares | Value |
|---|---|---|---|---|---|
| May 4, 2026 | CHOPRA DEEPAK | Director | Sell (S) | 20K | $5.6M |
| Feb 2, 2026 | CHOPRA DEEPAK | Director | Sell (S) | 20K | $5.0M |
| Nov 10, 2025 | CHOPRA DEEPAK | EXECUTIVE CHAIRMAN, Director | Sell (S) | 20K | $5.7M |
| Nov 7, 2025 | HAWKINS JAMES B | Director | Sell (S) | 2K | $425K |
| Nov 7, 2025 | Morben Paul Keith | PRES., OPTOELECTRONICS DIV | Sell (S) | 416 | $116K |
| Oct 1, 2025 | CHOPRA DEEPAK | EXECUTIVE CHAIRMAN, Director | Sell (S) | 20K | $4.9M |
| Sep 12, 2025 | Ballhaus William Francis JR | Director | Sell (S) | 562 | $134K |
| Sep 4, 2025 | Morben Paul Keith | PRES., OPTOELECTRONICS DIV | Sell (S) | 2K | $396K |
| Jun 12, 2025 | LUSKIN MEYER/ | Director | Sell (S) | 1K | $237K |
| May 21, 2025 | Ballhaus William Francis JR | Director | Sell (S) | 750 | $172K |
| May 13, 2025 | EDRICK ALAN I | EVP & CFO | Sell (S) | 20K | $4.6M |
| May 8, 2025 | Grindstaff Glenn | CHIEF HUMAN RESOURCES OFFICER | Sell (S) | 688 | $155K |
| Class | 13F holders | Value held |
|---|---|---|
| OSISthis pagecs | 318 funds | $4.5B |
| OSIS 2.25 08/01/29SDBCV | 31 funds | $438.6M |
Same issuer, multiple share classes. The consensus leaderboards count this company once across all classes; this is the per-class detail.
Connected entities for OSIS
This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.
curl -H "Authorization: Bearer YOUR_API_KEY" \ "https://arkolith.com/api/v1/stocks/OSIS/capital-change-brief"
Use Arkolith's capital_change_brief for OSIS. Tell me what changed, whether insider activity corroborates it, and cite the SEC evidence.
13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OSIS. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.