Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in HOLX held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 22.5M | $1.70B | +1.9% | 10.088% | 0.03% |
| 2 | VANGUARD CAPITAL MANAGEMENT LLC | 14.5M | $1.10B | — | 6.497% | 0.03% |
| 3 | STATE STREET CORP | 10.0M | $755.2M | +1.2% | 4.475% | 0.03% |
| 4 | HBK INVESTMENTS L P | 9.8M | $740.8M | +16.7% | 4.390% | 9.63% |
| 5 | VANGUARD PORTFOLIO MANAGEMENT LLC | 9.6M | $727.2M | — | 4.309% | 0.04% |
| 6 | FIL Ltd | 7.8M | $591.2M | +49.6% | 3.504% | 0.46% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 6.1M | $456.3M | +2.4% | 2.714% | 0.03% |
| 8 | MILLENNIUM MANAGEMENT LLC | 5.7M | $427.6M | +61.6% | 2.534% | 0.28% |
| 9 | UBS Group AG | 5.1M | $384.7M | +62.1% | 2.280% | 0.06% |
| 10 | BALYASNY ASSET MANAGEMENT LLC | 4.7M | $357.0M | +193.7% | 2.116% | 1.22% |
| 11 | Pentwater Capital Management LP | 4.5M | $340.2M | +5.9% | 2.016% | 1.77% |
| 12 | MORGAN STANLEY | 3.6M | $270.1M | +51.3% | 1.600% | 0.02% |
| 13 | Invesco Ltd. | 3.2M | $239.2M | -11.9% | 1.417% | 0.04% |
| 14 | Qube Research & Technologies Ltd | 3.1M | $236.7M | +48.0% | 1.403% | 0.28% |
| 15 | O'Connor Alternative Investments LLC | 3.1M | $235.7M | — | 1.397% | 20.22% |
| 16 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 2.9M | $220.8M | -3.4% | 1.308% | 0.12% |
| 17 | NORTHERN TRUST CORP | 2.7M | $202.3M | -1.6% | 1.199% | 0.03% |
| 18 | GOLDMAN SACHS GROUP INC | 2.4M | $181.1M | +138.1% | 1.073% | 0.02% |
| 19 | UBS ASSET MANAGEMENT AMERICAS INC | 2.3M | $173.8M | +11.5% | 1.030% | 0.04% |
| 20 | BANK OF AMERICA CORP /DE/ | 2.3M | $170.4M | -23.2% | 1.010% | 0.01% |
| 21 | TUDOR INVESTMENT CORP ET AL | 2.2M | $166.1M | +36.5% | 0.984% | 0.58% |
| 22 | DEUTSCHE BANK AG\ | 2.2M | $164.3M | +34.1% | 0.974% | 0.05% |
| 23 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 2.2M | $163.1M | +2.9% | 0.966% | 0.02% |
| 24 | EARNEST PARTNERS LLC | 1.8M | $139.3M | -2.5% | 0.826% | 0.57% |
| 25 | DAVIDSON KEMPNER CAPITAL MANAGEMENT LP | 1.6M | $122.4M | — | 0.725% | 2.62% |
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 HOLX — a direct measure of their conviction.
Filings activity in HOLX during Q1 2026, grouped by how each filer changed its position.
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 | 687 | 5.9% | 90.72% | +3.20 pp | $15.39B | +3.7% |
| Q4 2025 | 730 | +2.0% | 87.52% | +15.47 pp | $14.85B | +21% |
| Q3 2025 | 716 | +5.3% | 72.05% | +0.81 pp | $12.23B | +1.1% |
| Q2 2025 | 680 | 1.2% | 71.24% | +1.49 pp | $12.09B | +2.1% |
| Q1 2025 | 688 | 1.0% | 69.75% | 14.11 pp | $11.84B | 17% |
| Q4 2024 | 695 | 0.7% | 83.86% | 8.51 pp | $14.23B | 9.2% |
| Q3 2024 | 700 | +2.5% | 92.37% | +10.47 pp | $15.67B | +13% |
| Q2 2024 | 683 | — | 81.90% | — | $13.90B | — |
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 HOLX stock.
Based on Q1 2026 13F filings, institutional ownership of Hologic, Inc. stands at 90.7%, held across 687 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of HOLX, with approximately 22,520,444 shares worth $1.70B as of Q1 2026.
Yes — 1 widely-followed marquee investor appear among the top 25 institutional holders of HOLX, including MILLENNIUM MANAGEMENT LLC.
Our composite Smart Money Score for HOLX is 48 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
98 institutions opened new positions in HOLX during Q1 2026, while 141 fully exited. 387 added to existing positions and 197 trimmed.
HOLX institutional ownership rose by 3.20 percentage points quarter-over-quarter, with a net change of -43 holders.
The top 10 institutions account for 47.0% of all reported 13F value in HOLX, and the top 25 account for 66.7%.
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.
Hologic, Inc. (HOLX) Institutional Ownership