Plus Therapeutics, Inc.
Plus Therapeutics, Inc. (PSTV) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · PSTV · as of Sep 30, 2025
Ownership Breakdown
23
Institutional Holders
▲ 5 vs Q2
$3.57M
Total Inst. Value
▲ $3.43M vs Q2
2.42M
Shares Outstanding
freeFloat 99.75%
5.21M
13F Shares Held
▲ 4.84M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
PSTV largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC surgical & medical instruments & apparatus | 1.45M | 2.99% | 2.99% | $989.63M | Nov 7, 2025 | ▲ 1.41M |
ALTIUM CAPITAL MANAGEMENT LP surgical & medical instruments & apparatus | 918.9K | 1.90% | 1.90% | $628.26M | Nov 4, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC surgical & medical instruments & apparatus | 813.3K | 1.68% | 1.68% | $556.02M | Nov 12, 2025 | ▲ 762.1K |
UBS GROUP AG surgical & medical instruments & apparatus | 623.9K | 1.29% | 1.29% | $426.73M | Nov 13, 2025 | ▲ 536.2K |
BLACKROCK, INC. surgical & medical instruments & apparatus | 469.4K | 97.00% | 97.00% | $320.92M | Nov 12, 2025 | ▲ 462.4K |
STATE STREET CORP surgical & medical instruments & apparatus | 341.9K | 70.66% | 70.66% | $233.75M | Nov 14, 2025 | NEW |
NORTHERN TRUST CORP surgical & medical instruments & apparatus | 265.5K | 54.87% | 54.87% | $181.51M | Nov 14, 2025 | NEW |
SCIENTECH RESEARCH LLC surgical & medical instruments & apparatus | 146.7K | 30.31% | 30.31% | $100.27M | Nov 14, 2025 | NEW |
SUSQUEHANNA INTERNATIONAL GROUP, LLP surgical & medical instruments & apparatus | 67.3K | 13.90% | 13.90% | $45.99M | Nov 14, 2025 | ▲ 67.3K |
MERCER GLOBAL ADVISORS INC /ADV surgical & medical instruments & apparatus | 28.5K | 5.88% | 5.88% | $19.47M | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
11
Increased
+3.26M shares8
New Positions
first time holders3
Decreased
−2.9K shares7
Sold Out
fully exitedNet shares change (top 50)
+3.25M
+3.26M / −2.9K
Net new holders
+9
8 new / 7 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
PSTV insider trading · insider activity
Source: SEC Form 4
5
Buy transactions
5
Sell transactions
1.00
Buy/Sell ratio
$1M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
van Es-Johansson An director | May 14, 2026 | Award | 3,686 | $5.76 | $21.2K | 3.7K | Form 4 ↗ |
van Es-Johansson An director | May 14, 2026 | Award | 3,686 | — | — | 3.7K | Form 4 ↗ |
Hawkins Richard J director | May 14, 2026 | Award | 3,686 | — | — | 3.7K | Form 4 ↗ |
Hawkins Richard J director | May 14, 2026 | Award | 3,686 | $5.76 | $21.2K | 3.7K | Form 4 ↗ |
Guse Kyle director | May 14, 2026 | Award | 3,686 | — | — | 3.7K | Form 4 ↗ |
Guse Kyle director | May 14, 2026 | Award | 3,686 | $5.76 | $21.2K | 3.7K | Form 4 ↗ |
Clowes Howard director | May 14, 2026 | Award | 3,686 | — | — | 3.7K | Form 4 ↗ |
Clowes Howard director | May 14, 2026 | Award | 3,686 | $5.76 | $21.2K | 3.7K | Form 4 ↗ |
ANDREWS RONALD ASBURY director | May 14, 2026 | Award | 3,686 | — | — | 3.7K | Form 4 ↗ |
ANDREWS RONALD ASBURY director | May 14, 2026 | Award | 3,686 | $5.76 | $21.2K | 3.7K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Plus Therapeutics, Inc. (PSTV) is primarily owned by institutional investors, who hold approximately 100.0% of total shares outstanding. Company insiders own approximately 0.25%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Plus Therapeutics, Inc. is VANGUARD GROUP INC, holding approximately 1.45 million shares — equal to 2.99% of outstanding shares — as of September 30, 2025.
A total of 23 institutional investors currently hold PSTV stock, with a combined institutional value of approximately $3,565,788 as of the most recent 13F filing period.
Frequently asked questions
PSTV ownershipPlus Therapeutics, Inc. (PSTV) is primarily owned by institutional investors, who hold approximately 100.0% of shares. The largest shareholder is VANGUARD GROUP INC with a 2.99% stake. Company insiders hold 0.25%. Data sourced from SEC Form 13F as of September 30, 2025.