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Of the 17 tracked institutions holding NBIX, 9 have a 3-year clone track record — 7 of them beat the S&P. Average holder's clone alpha: +3.2pt. It's a gauge of who owns the name, not just how many.
Among the 17 tracked institutional investors we monitor, NBIX (NEUROCRINE BIOSCIENCES INC) is held with a combined value of $5.92B across 36,823,183 shares. The largest holder is BlackRock, Inc. with a position worth $2.31B (0.03% of their portfolio). Magnetar Financial LLC opened a new position in the most recent quarter. 9 funds increased their holdings. 7 funds reduced their position.
Total Institutional Value
$5.92B
Total Shares Held
36,823,183
Institutional Holders
17
% of Shares Outstanding
36.2%
of 101.65M shares · SEC 2026-07-22
Days to Cover
3.4+3.7%
4.55M shares short · FINRA 2026-08-14
Tracked 13F institutions hold 36.2% of NBIX's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-07-22), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $2.31B | 0.03% | +2.4% |
| 2 | VANGUARD GROUP INC | $1.38B | 0.02% | -0.1% |
| 3 | STATE STREET CORP | $739.13M | 0.02% | +0.7% |
| 4 | AQR CAPITAL MANAGEMENT LLC | $643.47M | 0.22% | -22.7% |
| 5 | RENAISSANCE TECHNOLOGIES LLC | $393.68M | 0.54% | -3.4% |
| 6 | TWO SIGMA ADVISERS, LP | $119.50M | 0.23% | +466.4% |
| 7 | ARMISTICE CAPITAL, LLC | $90.31M | 2.50% | -26.0% |
| 8 | Gotham Asset Management, LLC | $62.62M | 0.15% | +3.2% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $56.25M | 0.01% | +120.7% |
| 10 | FMR LLC | $52.92M | 0.00% | +102.8% |
SEC Schedule 13D (activist) and 13G (passive) filings for NBIX. Filed when an investor acquires 5%+ ownership.
| Member | Type | Date |
|---|---|---|
| Lisa McClain | Sell | Jun 17, 2025 |
| Lisa McClain | Buy | Jun 11, 2025 |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of NBIX with a position worth $2.31B, representing 0.03% of their portfolio. In total, 17 institutional investors hold NBIX with a combined value of $5.92B.
In the most recent quarter, 1 fund opened a new position in NBIX. Additionally, 9 increased their holdings and 7 reduced their positions.
Institutional investors hold $5.92B worth of NBIX stock across 17 positions. The largest institutional holder is BlackRock, Inc. with $2.31B in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For NBIX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their NBIX positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$155.14
2026-09-09
YTD
+10.3%
51% of 52-week range
