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Of the 12 tracked institutions holding STRO, 6 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +6.3pt. It's a gauge of who owns the name, not just how many.
Among the 12 tracked institutional investors we monitor, STRO (SUTRO BIOPHARMA INC) is held with a combined value of $80.31M across 2,675,119 shares. The largest holder is BlackRock, Inc. with a position worth $37.27M. 4 funds opened new positions in the most recent quarter. 4 funds increased their holdings. 3 funds reduced their position.
Total Institutional Value
$80.31M
Total Shares Held
2,675,119
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. | $37.27M | 0.00% | +382.5% |
| 2 | MILLENNIUM MANAGEMENT LLC | $12.15M | 0.01% | +74.0% |
| 3 | STATE STREET CORP | $10.16M | 0.00% | +487.1% |
| 4 | Point72 Asset Management, L.P. | $7.90M | 0.01% | -65.6% |
| 5 | VANGUARD GROUP INC | $4.35M | 0.00% | New |
| 6 | CITADEL ADVISORS LLC | $3.39M | 0.00% | -13.2% |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $2.87M | 0.00% | -11.8% |
| 8 | Fisher Asset Management, LLC | $1.17M | 0.00% | - |
| 9 | PRICE T ROWE ASSOCIATES INC /MD/ | $452.00K | 0.00% | New |
| 10 | WELLINGTON MANAGEMENT GROUP LLP | $358.56K | 0.00% | New |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of STRO with a position worth $37.27M, representing 0.00% of their portfolio. In total, 12 institutional investors hold STRO with a combined value of $80.31M.
In the most recent quarter, 4 funds opened a new position in STRO. Additionally, 4 increased their holdings and 3 reduced their positions.
Institutional investors hold $80.31M worth of STRO stock across 12 positions. The largest institutional holder is BlackRock, Inc. with $37.27M 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 STRO, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their STRO 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 →
| 2026-08-14 |
| 6.4% | 2026-07-30 |
SEC Schedule 13D (activist) and 13G (passive) filings for STRO. Filed when an investor acquires 5%+ ownership.
Last Close
$10.79
2026-10-21
YTD
-1.6%
10% of 52-week range
