VivoSim Labs, Inc.
VivoSim Labs, Inc. (VIVS) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · VIVS · as of Sep 30, 2025
Ownership Breakdown
29
Institutional Holders
▲ 5 vs Q2
$644,369
Total Inst. Value
▲ $455,352 vs Q2
2.61M
Shares Outstanding
freeFloat 89.18%
220,763
13F Shares Held
▲ 92,177 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
VIVS largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
DRW SECURITIES, LLC | 67.5K | 2.70% | 2.70% | $197.05M | Nov 14, 2025 | NEW |
HRT FINANCIAL LP | 31.6K | 1.26% | 1.26% | $92.00M | Nov 14, 2025 | NEW |
TWO SIGMA INVESTMENTS, LP | 23.2K | 92.63% | 92.63% | $67.72M | Nov 14, 2025 | NEW |
VANGUARD GROUP INC | 22.4K | 89.36% | 89.36% | $65.33M | Nov 7, 2025 | — held |
TWO SIGMA SECURITIES, LLC | 18.2K | 72.75% | 72.75% | $53.19M | Nov 14, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC | 17.9K | 71.67% | 71.67% | $52.40M | Nov 12, 2025 | NEW |
UBS GROUP AG | 15.2K | 60.77% | 60.77% | $44.43M | Nov 13, 2025 | ▲ 1.1K |
BLACKROCK, INC. | 11.8K | 47.20% | 47.20% | $34.51M | Nov 12, 2025 | ▼ 1 |
NORTHERN TRUST CORP | 10.5K | 42.08% | 42.08% | $30.76M | Nov 14, 2025 | NEW |
TOWER RESEARCH CAPITAL LLC (TRC) | 1.2K | 4.80% | 4.80% | $3.51M | Nov 14, 2025 | ▼ 505 |
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
6
Increased
+1.2K shares11
New Positions
first time holders4
Decreased
−551 shares6
Sold Out
fully exitedNet shares change (top 50)
+656
+1.2K / −551
Net new holders
+7
11 new / 6 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
VIVS insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
5
Buy transactions
0
Sell transactions
0.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
Cohen Douglas Jay director | Jan 27, 2026 | Award | 15,000 | — | — | 20.7K | Form 4 ↗ |
Murphy Keith EXECUTIVE CHAIRMAN | Jan 27, 2026 | Award | 15,000 | — | — | 26.1K | Form 4 ↗ |
Milhous Alison Tjosvold director | Jan 27, 2026 | Award | 15,000 | — | — | 19.9K | Form 4 ↗ |
Gobel David director | Jan 27, 2026 | Award | 15,000 | — | — | 15.0K | Form 4 ↗ |
STERN ADAM K director | Jan 27, 2026 | Award | 15,000 | — | — | 19.9K | Form 4 ↗ |
Sethi Amar Akhtar Chief Scientific Officer | Nov 25, 2025 | Award | 53,500 | $2.19 | $117.2K | 53.5K | Form 4 ↗ |
Gobel David director | Nov 17, 2025 | Sale | 3,266 | $2.24 | $7.3K | 0 | Form 4 ↗ |
Lialin Tony Serge Chief Commercial Officer | Aug 11, 2025 | Award | 40,000 | $1.78 | $71.2K | 40.0K | 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
VivoSim Labs, Inc. (VIVS) is primarily owned by institutional investors, who hold approximately 8.5% of total shares outstanding. Company insiders own approximately 10.82%, while retail and public investors account for the remaining 80.71%.
The largest institutional shareholder of VivoSim Labs, Inc. is DRW SECURITIES, LLC, holding approximately 67,482 shares — equal to 2.70% of outstanding shares — as of September 30, 2025.
A total of 29 institutional investors currently hold VIVS stock, with a combined institutional value of approximately $644,369 as of the most recent 13F filing period.
Frequently asked questions
VIVS ownershipVivoSim Labs, Inc. (VIVS) is primarily owned by institutional investors, who hold approximately 8.5% of shares. The largest shareholder is DRW SECURITIES, LLC with a 2.70% stake. Company insiders hold 10.82%. Data sourced from SEC Form 13F as of September 30, 2025.