CTMX · Insider trading · 13F holders · Congress trades
CytomX Therapeutics, Inc. (CTMX)
Who is buying and selling CTMX: company insiders on SEC Form 4, hedge funds and superinvestors on Form 13F, and members of Congress under the STOCK Act. Every figure links to the filing or page it comes from.
- 13F filers holding
- 17
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
CTMX at a glance
- No open-market insider purchases or sales of CTMX were filed in the last 90 days.
- 17 13F filers hold CTMX among their 50 largest positions, worth $212.1M combined, including Joseph Edelman. The biggest bets by portfolio weight are Kynam Capital Management, LP (4.5%), Elmind Capital, LP (4.3%) and Ally Bridge Group (NY) LLC (3.7%). In their latest 13Fs, 0 managers opened a new position and 4 added to one.
- No member of Congress has disclosed a trade in CTMX.
CTMX insider trading
No open-market insider purchases or sales of CTMX were filed in the last 90 days.
Who owns CTMX? Hedge funds and superinvestors
17 13F filers hold CTMX among their 50 largest positions, worth $212.1M combined, including Joseph Edelman. The biggest bets by portfolio weight are Kynam Capital Management, LP (4.5%), Elmind Capital, LP (4.3%) and Ally Bridge Group (NY) LLC (3.7%). In their latest 13Fs, 0 managers opened a new position and 4 added to one.
Superinvestors holding CTMX: Joseph Edelman 0.6%
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Kynam Capital Management, LPHedge fund | 4.5% | $81.4M | 21,703,093 | +44.6% shares | Q2 2026 |
| Joseph EdelmanHedge fund | 0.6% | $39.1M | 10,439,185 | +3.4% shares | Q2 2026 |
| Venrock Adviser, LLCHedge fund | 0.6% | $18.7M | 4,982,124 | -50.1% shares | Q2 2026 |
| Elmind Capital, LPHedge fund | 4.3% | $17.1M | 4,550,000 | +0.0% shares | Q2 2026 |
| Nextech Invest Ltd.Hedge fund | 0.8% | $16.7M | 4,449,932 | +0.0% shares | Q2 2026 |
| Eversept Partners, LPHedge fund | 0.7% | $13.3M | 3,558,497 | +11.6% shares | Q2 2026 |
| ADAR1 Capital Management, LLCHedge fund | 0.6% | $12.6M | 3,365,118 | -1.3% shares | Q2 2026 |
| Seven Fleet Capital Management LPHedge fund | 0.7% | $4.1M | 1,085,398 | +192.2% shares | Q2 2026 |
| Ally Bridge Group (NY) LLCHedge fund | 3.7% | $2.9M | 775,000 | -13.9% shares | Q2 2026 |
| Schulhoff & Co IncWealth manager | 0.7% | $1.8M | 477,550 | +0.0% shares | Q2 2026 |
| Exome Asset Management LLCHedge fund | 1.1% | $1.7M | 460,067 | -11.8% shares | Q2 2026 |
| Peak Financial Advisors LLCWealth manager | 0.5% | $1.3M | 462,061 | — | Q3 2026 |
| Stonepine Capital Management, LLCHedge fund | 0.6% | $769K | 205,000 | +2.5% shares | Q2 2026 |
| Velan Capital Investment Management LPHedge fund | 0.3% | $450K | 120,000 | -77.8% shares | Q2 2026 |
| PSP Research LLCInstitutional asset manager | 0.1% | $107K | 39,400 | — | Q3 2026 |
| Forefront Analytics, LLCInstitutional asset manager | 0.1% | $94K | 25,033 | +100.6% shares | Q2 2026 |
| Nierenberg Investment Management Company, LLCHedge fund | 0.0% | $47K | 12,555 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q3 2026: 2, Q2 2026: 15). Screen CTMX in the grand portfolio →
CTMX stock trades by members of Congress
No member of Congress has disclosed a trade in CTMX.
CTMX questions and answers
Are insiders buying CTMX stock?
No open-market insider purchases or sales of CTMX were filed in the last 90 days.
Which hedge funds own CTMX?
17 13F filers hold CTMX among their 50 largest positions, worth $212.1M combined, including Joseph Edelman. The biggest bets by portfolio weight are Kynam Capital Management, LP (4.5%), Elmind Capital, LP (4.3%) and Ally Bridge Group (NY) LLC (3.7%). In their latest 13Fs, 0 managers opened a new position and 4 added to one.
Has Congress traded CTMX?
No member of Congress has disclosed a trade in CTMX.
Who is the largest holder of CTMX?
Among 13F filers, Kynam Capital Management, LP reports the largest CTMX position, $81.4M (21,703,093 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Kynam Capital Management, LP's: 4.5% of its portfolio.
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