Stock Analysis
Data Source: SEC EDGAR 13F
Updated Hourly

Sutro Biopharma Inc (STRO)

77 + Investors. Track Smart Money conviction in STRO. See who's accumulating, reducing, or initiating positions.

Current Price
-- USD
Analyst Target
-- (0 analysts)
Upside
0.00%
Net Flow Q/Q
↑ +18
Streak
1Q ▲
Buyers last Q
70%

Smart Money Signals — STRO

Based on 77 hedge funds · latest filing: 2026 Q1 · updated quarterly

📈

Buying streak — 1 quarter in a row

last 6Q
For 1 consecutive quarter, more hedge funds added STRO than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.
🔻

Below peak — only 59% of 3.0Y high

59% of all-time peak
Only 77 funds hold STRO today versus a peak of 130 funds at 2024 Q3 — just 59% of the maximum. Low institutional ownership can mean the stock is out of favor, but it also means there's a large pool of potential buyers if sentiment turns.
📉

Outflows — 32% fewer funds vs a year ago

fund count last 6Q
36 fewer hedge funds hold STRO compared to a year ago (-32% decline). When institutions consistently reduce their exposure, it's worth exploring the underlying fundamental reasons driving them away.
🟢

More buyers than sellers — 70% buying

49 buying21 selling
Last quarter: 49 funds were net buyers (26 opened a brand new position + 23 added to an existing one). Only 21 were sellers (13 trimmed + 8 sold completely). A clear majority buying is a strong confirmation signal.
📈

More new buyers each quarter (+15 vs last Q)

new funds entering per quarter
Funds opening a new STRO position: 30 → 9 → 11 → 26. A growing influx of new institutional buyers means the asset is still gathering momentum — the consensus hasn't fully saturated yet.
🔒

55% of holders stayed for 2+ years

■ 55% conviction (2yr+) ■ 25% medium ■ 21% new
42 out of 77 hedge funds have held STRO for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.
💰

Value +441% but shares only +158% — price-driven

Value
+441%
Shares
+158%
Last quarter: the total dollar value of institutional holdings rose +441%, but actual share count only changed +158%. The gap is explained by the stock's price rising — not new buying. Strong value growth with weak share growth means the rally is price momentum, not fresh institutional demand.
➡️

Steady discovery — ~26 new funds/quarter

20 → 30 → 9 → 11 → 26 new funds/Q
New funds entering each quarter: 30 → 9 → 11 → 26. Consistent flow of new institutional buyers without clear acceleration or slowdown.
🏛️

Veteran-anchored — 67% veterans vs 23% newcomers

■ 67% veterans ■ 10% 1-2yr ■ 23% new
Entry-cohort mix of 79 holders: 53 (67%) are 2+ year veterans, 8 entered 1–2 years ago, and 18 (23%) joined within the past year. A veteran-weighted cap table skews toward institutional memory over fresh momentum.
📋

Smaller funds dominant — 10% AUM from top-100

10% from top-100 AUM funds
22 of 77 holders rank in the top 100 by AUM, but together hold only 10% of total institutional value. The stock is held primarily by smaller and mid-sized funds.
1.5
out of 10
Low Exit Risk
Exit risk score 1.5/10 — low institutional crowding. Ownership is below peak levels, holder base is relatively sticky, and buying momentum is positive.

Methodology note: these Smart Money cards use consecutive 13F disclosure snapshots, not trade-by-trade execution data. "Buying", "selling", "new holders", and "trimmed" refer to quarter-over-quarter changes in reported holders, aggregate shares, or disclosed position values between filings. They are useful for ownership regime analysis and crowding, but they do not imply exact trade timing on the filing date.

Institutional Sentiment Summary — STRO

In 2026 Q1, 49 hedge funds were net buyers of STRO (26 opened a new position, 23 added to an existing one), while 21 reduced or exited (13 trimmed, 8 sold completely) — a 70% buyer ratio, indicating clear institutional accumulation. Net fund flow last quarter: +18 funds (more new holders than closures). Total institutional holders: 77.

Hedge Fund Ownership: STRO

How many hedge funds hold STRO — quarterly history vs. share price
Quarterly hedge fund ownership of STRO vs. share price

Market Analysis: STRO

Analyst Price Targets

Avg. Price Target
--

Analyst Recommendations

Stock Performance

Real-time

Company Profile: STRO

-- --

Institutional ownership data sourced from SEC EDGAR Form 13F-HR filings.

Is It Too Late to Buy Sutro Biopharma Inc (STRO) Based on Hedge Fund 13F Filings?

Signal Freshness measures how much STRO has moved relative to its sector benchmark (XLV) since the 2026 Q2 13F filing. A stock that has barely outrun its sector is still a relatively fresh entry point — the fund's thesis has not yet been priced in by the broader market.

Since Quarter End June 30, 2026 · 45d ago
STRO
-35.8%
XLV
+6.1%

STRO outperformed XLV by -41.9% since June 30, 2026.

Since 13F Filing Date August 14, 2026 · 0d ago
STRO
+0.0%
XLV
+0.0%

Since the filing became public, STRO outperformed XLV by +0.0% .

Interpretation: The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference. Learn more →

Smart Money Signal ?
Limited Smart Money Interest

No strong consensus or elite conviction detected among institutional holders.

6 top-rated funds 3 high-conviction
Consensus
3.7
/ 10
breadth
×
Elite
2.9
/ 10
conviction
Hedge Fund Positioning: STRO
2026 Q2 Stats Unlock in 5 days 77 + Investors

Track Smart Money conviction in STRO. See who's accumulating, reducing, or initiating positions.

Metric All 13F Filers (2026 Q1) Prior (2025 Q4) Change
Funds Holding 77 59 30.51%
13F Shares 14M 6M 158.24%
Total Value $351M $65M 441.49%
New Positions 26 11 +15
Increased Positions 23 0 +23
Closed Positions 8 37 -29
Reduced Positions 12 48 -36
Total Calls 0 0 -
Total Puts 2 0 100%
PUT/CALL Ratio 0.0 0.0 Bullish

Statistics: STRO

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Valuation Measures Data as of: --

Market Cap --
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PEG Ratio (5yr expected) --
Price/Sales (ttm) --
Price/Book (mrq) --
Enterprise Value/Revenue --
Enterprise Value/EBITDA --
Beta (5Y Monthly) --
Short Ratio (Days to Cover) --
Short % of Float --

Financial Highlights

Profitability
Profit Margin --
Return on Assets (ttm) --
Return on Equity (ttm) --
Income Statement & Cash Flow
Revenue (ttm) --
Net Income Avi to Common (ttm) --
Diluted EPS (ttm) --
Total Cash (mrq) --
Total Debt/Equity (mrq) --
Levered Free Cash Flow (ttm) --

Institutional Holders (2026 Q2)

77 + investors

Explore institutional interest and hedge fund ownership dynamics. Analyze portfolio weights, new positions, and conviction trends in STRO. Verified SEC 13F-HR filings.

QUARTER:
2026 Q2 filings are still coming in. Only funds that have filed so far are shown — top holders may not have reported yet. Full 13F data typically settles by ~50 days after quarter-end.
Top 25 STRO holders by conviction (% of portfolio weight) — 2026 Q1 · Source: SEC Form 13F
# Investor % of Portfolio Shares Mkt Value
1 KVP Capital Advisors, LP 5.52% 226,575 $7.5M
2 Affinity Asset Advisors, LLC 1.76% 1,172,487 $38.9M
3 Merck & Co., Inc. 1.72% 272,351 $9.0M
4 AJU IB Investment Co., Ltd. 1.43% 17,500 $436K
5 Persistent Asset Partners Ltd 0.07% 6,569 $218K
6 Informed Momentum Co LLC 0.05% 16,232 $539K
7 Sigma Planning Corp 0.04% 45,020 $1.5M
8 Y-Intercept (Hong Kong) Ltd 0.04% 55,879 $1.9M
9 State of Wyoming 0.01% 1,618 $54K
10 Owl Creek Wealth Partners LLC 0.00% 491 $16K
11 Marshall Wace, LLP 0.00% 175,246 $5.8M
12 Renaissance Technologies LLC 0.00% 86,324 $2.9M
13 Mackenzie Financial Corp 0.00% 94,767 $3.1M
14 Ameritas Investment Partners, Inc. 0.00% 1,448 $48K
15 Police & Firemen's Retirement System of New Jersey 0.00% 4,704 $156K
16 Walleye Capital LLC 0.00% 9,306 $309K
17 UBS Group AG 0.00% 208,512 $6.9M
18 Vanguard Fiduciary Trust Co 0.00% 104,232 $3.5M
19 Physician Wealth Advisors, Inc. 0.00% 182 $6K
20 Tower Research Capital LLC (TRC) 0.00% 866 $29K
21 BlackRock, Inc. 0.00% 1,122,655 $37.3M
22 Rhumbline Advisers 0.00% 20,628 $685K
23 Vanguard Capital Management LLC 0.00% 694,219 $23.0M
24 State Board of Administration of Florida Retirement System 0.00% 7,001 $232K
25 Fortitude Family Office, LLC 0.00% 56 $2K
Investor Ownership
History 		% of Portfolio Prev % Rank Conviction Avg Buy Price 13F Score™ 3Y / 7Y Sell Timing Shares Mkt Value Change Change % Source Quarter Filed

Frequently Asked Questions — Sutro Biopharma Inc (STRO)

What does the Smart Money Trend signal show for STRO?

Buying streak — 1 quarter in a row: For 1 consecutive quarter, more hedge funds added STRO than sold it. That's a consistent pattern of professional buying — not a one-time trade. When institutions keep buying quarter after quarter, it usually means they see a multi-year opportunity, not just a short-term momentum flip.

What is the institutional breadth score for STRO?

More buyers than sellers — 70% buying: Last quarter: 49 funds were net buyers (26 opened a brand new position + 23 added to an existing one). Only 21 were sellers (13 trimmed + 8 sold completely). A clear majority buying is a strong confirmation signal.

What is the fund quality score for STRO holders?

Smaller funds dominant — 10% AUM from top-100: 22 of 77 holders rank in the top 100 by AUM, but together hold only 10% of total institutional value. The stock is held primarily by smaller and mid-sized funds.

How long have hedge funds held STRO?

55% of holders stayed for 2+ years: 42 out of 77 hedge funds have held STRO for over 2 years without selling. Long-term investors are generally harder to shake out during market stress, creating a stable ownership base that limits the risk of sudden capitulation.

Is it too late to buy Sutro Biopharma Inc (STRO) following the 2026 Q2 hedge fund 13F filings?

As of today, STRO has moved +0.0% since the 2026 Q2 13F filing date (August 14, 2026), compared to +0.0% for the XLV sector ETF — an outperformance of +0.0%. Since the quarter end (June 30, 2026), STRO has gained -35.8% vs +6.1% for XLV. The stock is tracking its sector benchmark closely. The signal remains fresh and the entry point is still near the fund's implied reference.

Where does this institutional ownership data come from?

All holdings data is sourced from SEC Form 13F filings, which institutional investment managers with over $100 million in assets are required to submit quarterly. Data is parsed directly from SEC EDGAR.

Disclaimer: The information on this page is for informational purposes only and does not constitute investment advice, a recommendation, or an offer to buy or sell any security. Institutional holdings data is sourced from SEC Form 13F filings and reflects positions as of the filing date. Past performance of any fund or portfolio is not indicative of future results. 13Foresight is not a registered investment adviser. Always conduct your own due diligence before making investment decisions.

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