CERo Therapeutics Holdings, Inc.
CERo Therapeutics Holdings, Inc. (CERO) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CERO · as of Sep 30, 2025
Ownership Breakdown
10
Institutional Holders
▲ 2 vs Q2
$798,684
Total Inst. Value
▼ $1.58M vs Q2
1.21M
Shares Outstanding
freeFloat 97.90%
156,980
13F Shares Held
▼ 89,791 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
CERO largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
PARALLEL ADVISORS, LLC blank checks | 121.0K | 42.08% | 42.08% | $615.89M | Nov 13, 2025 | ▼ 99.0K |
ARCH VENTURE MANAGEMENT, LLC blank checks | 22.4K | 7.79% | 7.79% | $113.96M | Nov 14, 2025 | — held |
SUSQUEHANNA INTERNATIONAL GROUP, LLP blank checks | 10.2K | 3.56% | 3.56% | $52.14M | Nov 14, 2025 | NEW |
TOWER RESEARCH CAPITAL LLC (TRC) blank checks | 1.3K | 0.45% | 0.45% | $6.61M | Nov 14, 2025 | ▲ 615 |
FNY INVESTMENT ADVISERS, LLC blank checks | 1.1K | 0.37% | 0.37% | $5.00M | Dec 15, 2025 | — held |
CITIGROUP INC blank checks | 968 | 0.34% | 0.34% | $4.93M | Nov 10, 2025 | NEW |
SBI SECURITIES CO., LTD. blank checks | 18 | 0.01% | 0.01% | $92,000 | Nov 5, 2025 | — held |
UBS GROUP AG blank checks | 6 | 0.00% | 0.00% | $30,000 | Nov 13, 2025 | ▼ 2.6K |
JONES FINANCIAL COMPANIES LLLP blank checks | 3 | 0.00% | 0.00% | $16,000 | Nov 4, 2025 | — held |
BANK OF AMERICA CORP /DE/ blank checks | 3 | 0.00% | 0.00% | $15,000 | Feb 3, 2026 | ▲ 1 |
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
2
Increased
+616 shares2
New Positions
first time holders2
Decreased
−101.6K shares0
Sold Out
fully exitedNet shares change (top 50)
101.0K
+616 / −101.6K
Net new holders
+2
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CERO insider trading · insider activity
Source: SEC Form 4
8
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 |
|---|---|---|---|---|---|---|---|
Francois Eric director | Mar 4, 2026 | Award | 1,823,278 | $0.06 | $100.3K | 1.82M | Form 4 ↗ |
Rolfe Lindsey director | Jan 7, 2026 | Award | 690,900 | $0.06 | $38.0K | 690.9K | Form 4 ↗ |
LAPORTE KATHLEEN director | Jan 7, 2026 | Award | 690,900 | $0.06 | $38.0K | 690.9K | Form 4 ↗ |
Pierce Kristen Chief Development Officer | Jan 7, 2026 | Award | 1,612,099 | $0.06 | $88.7K | 1.61M | Form 4 ↗ |
Patel Shami director | Jan 7, 2026 | Award | 690,900 | $0.06 | $38.0K | 690.9K | Form 4 ↗ |
ATWOOD BRIAN G director | Jan 7, 2026 | Award | 1,612,099 | $0.06 | $88.7K | 1.61M | Form 4 ↗ |
Ehrlich Christopher B Chairman and CEO | Jan 7, 2026 | Award | 4,530,997 | $0.06 | $249.2K | 4.53M | Form 4 ↗ |
Byrnes Michael director | Jan 7, 2026 | Award | 690,900 | $0.06 | $38.0K | 690.9K | Form 4 ↗ |
KUCHARCHUK ANDREW ALBERT Chief Financial Officer | Jan 7, 2026 | Award | 1,162,099 | $0.06 | $63.9K | 1.16M | Form 4 ↗ |
LAPORTE KATHLEEN director | May 30, 2025 | Award | 9,326 | $0.45 | $4.2K | 9.3K | 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
CERo Therapeutics Holdings, Inc. (CERO) is primarily owned by institutional investors, who hold approximately 13.0% of total shares outstanding. Company insiders own approximately 2.10%, while retail and public investors account for the remaining 84.87%.
The largest institutional shareholder of CERo Therapeutics Holdings, Inc. is PARALLEL ADVISORS, LLC, holding approximately 121,000 shares — equal to 42.08% of outstanding shares — as of September 30, 2025.
A total of 10 institutional investors currently hold CERO stock, with a combined institutional value of approximately $798,684 as of the most recent 13F filing period.
Frequently asked questions
CERO ownershipCERo Therapeutics Holdings, Inc. (CERO) is primarily owned by institutional investors, who hold approximately 13.0% of shares. The largest shareholder is PARALLEL ADVISORS, LLC with a 42.08% stake. Company insiders hold 2.10%. Data sourced from SEC Form 13F as of September 30, 2025.