Latest Period
Q4 2025
Security Snapshot
SUTRO BIOPHARMA, INC. - Common Stock, par value $0.001 per share (STRO) Institutional Ownership
CUSIP: 869367102
13F Institutional Holders and Ownership History from Q3 2018 to Q1 2026
Institutions Reporting
6
Shares (Excl. Options)
290,035
Price
$11.57
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- Type / Class
- Equity / Common Stock, par value $0.001 per share
- Symbol
- STRO on Nasdaq
- Shares outstanding
- 16,611,035
- Price per share
- $24.92
- All holders as of 31 Dec 2025
- Q4 2025
- Total 13F shares
- 290,035
- Total reported value
- $3,355,706
- % of total 13F portfolios
- 0%
- Share change
- -53,066,205
- Value change
- -$74,008,020
- Number of holders
- 6
- Price from insider filings
- $24.92
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Quick Takeaways
- STRO - SUTRO BIOPHARMA, INC. - Common Stock, par value $0.001 per share is tracked under CUSIP 869367102.
- 6 institutions reported positions in Q4 2025.
- 6 significant owners is listed from Schedule 13D/13G reporting.
What Changed
- Holder count moved from 6 to 2 between Q4 2025 and Q1 2026.
- Reported value moved from $3,355,706 to $2,641.
Why This Matters
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Source Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 6 institutions filings for Q4 2025.
Investment Quick Answers
What is CUSIP 869367102?
CUSIP 869367102 identifies STRO - SUTRO BIOPHARMA, INC. - Common Stock, par value $0.001 per share in SEC 13F datasets.
Where can I see the latest institutional holders?
Review the Q4 2025 holders report and the ownership history table below.
Next ownership checks
Use the next link that matches the question you still need to answer about this security.
- Latest 13F filings when you want to inspect fresh institutional portfolio moves.
- Latest Schedule 13D/13G reports when you need large-owner changes outside the 13F cycle.
- All institutional ownership pages to compare this security with other holder-history pages.
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 869367102:
Significant Owners of SUTRO BIOPHARMA, INC. - Common Stock, par value $0.001 per share (STRO) based on Schedule 13D/G filings
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Affinity Asset Advisors, LLC | 7.8% | $5,717,348 | 6,583,772 | Affinity Healthcare Fund, LP | 16 Oct 2025 | |||
| VANGUARD GROUP INC | 4.9% | $2,937,877 | 4,115,250 | The Vanguard Group | 30 Jun 2025 | |||
| BlackRock, Inc. | 2.5% | -69% | $1,493,679 | -$2,892,242 | 2,092,281 | -66% | BlackRock, Inc. | 30 Jun 2025 |
| Point72 Asset Management, L.P. | 5.7% | $23,590,623 | 946,829 | Point72 Asset Management, L.P. | 24 Apr 2026 | |||
| PERCEPTIVE ADVISORS LLC | 5.4% | $22,370,431 | 898,025 | Perceptive Advisors LLC | 14 Apr 2026 | |||
| MILLENNIUM MANAGEMENT LLC | 1.3% | -72% | $5,240,663 | -$112,268,464 | 210,378 | -96% | Millennium Management LLC | 31 Mar 2026 |
As of 31 Dec 2025, 6 institutional investors reported holding 290,035 shares of SUTRO BIOPHARMA, INC. - Common Stock, par value $0.001 per share (STRO). This represents 1.7% of the company’s total 16,611,035 outstanding shares.
Institutional Holders of SUTRO BIOPHARMA, INC. - Common Stock, par value $0.001 per share (STRO) across Reporting Periods
| Period | Reported Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 106 | $2,641 | $24.92 | 2 | |
| 2025 Q4 | 290,035 | $3,355,706 | -$74,008,020 | $11.57 | 6 |
| 2025 Q3 | 53,354,083 | $46,329,126 | -$1,641,183 | $0.87 | 84 |
| 2025 Q2 | 55,585,121 | $39,680,994 | -$3,651,726 | $0.71 | 100 |
| 2025 Q1 | 61,457,334 | $39,985,859 | -$10,841,219 | $0.65 | 113 |
| 2024 Q4 | 63,895,959 | $117,565,386 | -$7,306,459 | $1.84 | 122 |
| 2024 Q3 | 62,516,525 | $216,373,636 | -$1,660,759 | $3.46 | 130 |
| 2024 Q2 | 63,167,394 | $185,075,042 | +$25,139,079 | $2.93 | 119 |
| 2024 Q1 | 53,412,221 | $301,719,025 | +$2,094,339 | $5.65 | 116 |
| 2023 Q4 | 55,648,249 | $238,729,642 | -$219,480 | $4.29 | 113 |
| 2023 Q3 | 55,996,442 | $194,308,615 | +$5,622,550 | $3.47 | 108 |
| 2023 Q2 | 54,105,078 | $251,585,717 | +$2,181,872 | $4.65 | 119 |
| 2023 Q1 | 53,720,779 | $247,499,715 | +$10,470,599 | $4.62 | 114 |
| 2022 Q4 | 49,984,035 | $403,859,817 | +$6,296,600 | $8.08 | 116 |
| 2022 Q3 | 50,396,383 | $279,697,401 | +$23,514,794 | $5.55 | 111 |
| 2022 Q2 | 46,245,672 | $240,931,373 | +$15,713,924 | $5.21 | 111 |
| 2022 Q1 | 41,606,389 | $341,990,813 | -$38,514,469 | $8.22 | 111 |
| 2021 Q4 | 39,677,298 | $590,411,817 | -$4,363,219 | $14.88 | 114 |
| 2021 Q3 | 39,817,120 | $752,214,523 | -$26,368,206 | $18.89 | 119 |
| 2021 Q2 | 41,241,047 | $766,657,023 | -$71,886,996 | $18.59 | 121 |
| 2021 Q1 | 44,209,991 | $1,005,487,689 | +$114,863,310 | $22.76 | 136 |
| 2020 Q4 | 39,392,744 | $855,224,796 | +$184,675,658 | $21.71 | 132 |
| 2020 Q3 | 31,151,440 | $313,088,624 | +$67,545,691 | $10.05 | 87 |
| 2020 Q2 | 23,997,579 | $186,238,799 | +$97,614,730 | $7.76 | 76 |
| 2020 Q1 | 11,868,607 | $116,270,683 | +$7,872,102 | $10.20 | 60 |
| 2019 Q4 | 11,616,437 | $127,772,633 | +$7,088,075 | $11.00 | 64 |
| 2019 Q3 | 11,074,608 | $91,621,057 | -$8,301,817 | $9.09 | 59 |
| 2019 Q2 | 11,817,484 | $122,739,770 | +$6,666,665 | $11.38 | 58 |
| 2019 Q1 | 11,231,778 | $116,185,606 | +$4,727,906 | $11.39 | 49 |
| 2018 Q4 | 9,707,399 | $87,234,000 | -$10,616,486 | $9.02 | 41 |
| 2018 Q3 | 9,086,875 | $135,767,000 | +$129,306,000 | $15.00 | 32 |