New Positions
3 managers initiated
Top five by reported value
Sutro Biopharma Inc NASDAQ NMS - GLOBAL MARKET:STRO
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
3 new1 added6 reduced81 exited
Total Institutional Holders
10
as of 2025-12-31
Top Holder
Merck & Co., Inc.
$3.2M
Largest QoQ Increase
FNY Investment Advisers, LLC
+10,000 sh
Largest QoQ Decrease
SUVRETTA CAPITAL MANAGEMENT, LLC
-6,488,324 sh
New Positions(3)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Fortitude Family Office, LLC | 56 | +56 | $648 | +$648 | — |
| IFP Advisors, Inc | 21 | +21 | $18 | +$18 | — |
| FNY Investment Advisers, LLC | 10,000 | +10,000 | $8 | +$8 | — |
Added To(1)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| BARCLAYS PLC | 6,618 | +3,851 | $4.7K | +$2.3K | 139.2% |
Reduced(6)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| Merck & Co., Inc. | 272,351 | -2,451,158 | $3.2M | +$786.0K | -90.0% |
| AJU IB Investment Co., Ltd. | 17,500 | -157,500 | $202.5K | +$49.4K | -90.0% |
| Bogart Wealth, LLC | 50 | -450 | $579 | +$145 | -90.0% |
| Parallel Advisors, LLC | 47 | -418 | $544 | +$140 | -89.9% |
| EverSource Wealth Advisors, LLC | 31 | -423 | $359 | -$35 | -93.2% |
| BANK OF AMERICA CORP /DE/ | 119,434 | 0 | $103.7K | $0 | 0.0% |
Sold Out(81)
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| Merck & Co., Inc. | 272,351 | $3.2M | -2,451,158 | -90.0% |
| AJU IB Investment Co., Ltd. | 17,500 | $202.5K | -157,500 | -90.0% |
| BANK OF AMERICA CORP /DE/ | 119,434 | $103.7K | 0 | 0.0% |
| BARCLAYS PLC | 6,618 | $4.7K | +3,851 | 139.2% |
| Fortitude Family Office, LLC | 56 | $648 | +56 | — |
| Bogart Wealth, LLC | 50 | $579 | -450 | -90.0% |
| Parallel Advisors, LLC | 47 | $544 | -418 | -89.9% |
| EverSource Wealth Advisors, LLC | 31 | $359 | -423 | -93.2% |
| IFP Advisors, Inc | 21 | $18 | +21 | — |
| FNY Investment Advisers, LLC | 10,000 | $8 | +10,000 | — |
New & Closed Positions this quarter
Closed Positions
81 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for STRO against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.