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Of the 12 tracked institutions holding SIBN, 4 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +6.2pt. It's a gauge of who owns the name, not just how many.
Among the 12 tracked institutional investors we monitor, SIBN (SI BONE INC) is held with a combined value of $168.83M across 9,798,282 shares. The largest holder is BlackRock, Inc. with a position worth $60.00M. Magnetar Financial LLC opened a new position in the most recent quarter. 7 funds increased their holdings. 4 funds reduced their position.
Total Institutional Value
$168.83M
Total Shares Held
9,798,282
Institutional Holders
12
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $60.00M | 0.00% | +7.2% |
| 2 | VANGUARD GROUP INC | $49.33M | 0.00% | +0.5% |
| 3 | STATE STREET CORP | $19.85M | 0.00% | +7.5% |
| 4 | Point72 Asset Management, L.P. | $12.90M | 0.02% | -6.0% |
| 5 | WELLINGTON MANAGEMENT GROUP LLP | $12.12M | 0.00% | -3.9% |
| 6 | MILLENNIUM MANAGEMENT LLC | $5.95M | 0.00% | -1.4% |
| 7 | AQR CAPITAL MANAGEMENT LLC | $4.14M | 0.00% | +339.9% |
| 8 | TWO SIGMA ADVISERS, LP | $2.24M | 0.00% | +11.5% |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $1.08M | 0.00% | +33.0% |
| 10 | RENAISSANCE TECHNOLOGIES LLC | $719.71K | 0.00% | -90.7% |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of SIBN with a position worth $60.00M, representing 0.00% of their portfolio. In total, 12 institutional investors hold SIBN with a combined value of $168.83M.
In the most recent quarter, 1 fund opened a new position in SIBN. Additionally, 7 increased their holdings and 4 reduced their positions.
Institutional investors hold $168.83M worth of SIBN stock across 12 positions. The largest institutional holder is BlackRock, Inc. with $60.00M 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 SIBN, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their SIBN 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 →
| 2026-07-30 |
SEC Schedule 13D (activist) and 13G (passive) filings for SIBN. Filed when an investor acquires 5%+ ownership.
Last Close
$20.82
2026-10-21
YTD
+5.2%
94% of 52-week range