PRME · Insider trading · 13F holders · Congress trades
Prime Medicine Inc (PRME)
Who is buying and selling PRME: 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
- 6
- Insider buys, 90 days
- $0
- Insider sales, 90 days
- $0
- Congress trades, 12 months
- 0
PRME at a glance
- No open-market insider purchases or sales of PRME were filed in the last 90 days.
- 6 13F filers hold PRME among their 50 largest positions, worth $82.2M combined. The biggest bets by portfolio weight are Alessandra Capital Management, LLC (1.7%), Chelsea Counsel Co (0.7%) and Casdin Capital, LLC (0.6%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
- No member of Congress has disclosed a trade in PRME.
PRME insider trading
No open-market insider purchases or sales of PRME were filed in the last 90 days.
Who owns PRME? Hedge funds and superinvestors
6 13F filers hold PRME among their 50 largest positions, worth $82.2M combined. The biggest bets by portfolio weight are Alessandra Capital Management, LLC (1.7%), Chelsea Counsel Co (0.7%) and Casdin Capital, LLC (0.6%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
| Manager | % of portfolio | Value | Shares | Last quarter | 13F |
|---|---|---|---|---|---|
| Alphabet Inc.Corporation | 0.1% | $61.1M | 16,562,498 | +0.0% shares | Q2 2026 |
| Casdin Capital, LLCHedge fund | 0.6% | $11.7M | 3,167,175 | +0.0% shares | Q2 2026 |
| Redmile Group, LLCHedge fund | 0.3% | $5.1M | 1,389,632 | -12.6% shares | Q2 2026 |
| Alessandra Capital Management, LLCWealth manager | 1.7% | $2.5M | 666,603 | +56.7% shares | Q2 2026 |
| Chelsea Counsel CoInstitutional asset manager | 0.7% | $1.7M | 449,060 | -2.9% shares | Q2 2026 |
| IvyRock Asset Management (HK) LtdHedge fund | 0.1% | $154K | 41,800 | +0.0% shares | Q2 2026 |
Each manager counts with its latest 13F (Q2 2026: 6). Screen PRME in the grand portfolio →
PRME stock trades by members of Congress
No member of Congress has disclosed a trade in PRME.
PRME questions and answers
Are insiders buying PRME stock?
No open-market insider purchases or sales of PRME were filed in the last 90 days.
Which hedge funds own PRME?
6 13F filers hold PRME among their 50 largest positions, worth $82.2M combined. The biggest bets by portfolio weight are Alessandra Capital Management, LLC (1.7%), Chelsea Counsel Co (0.7%) and Casdin Capital, LLC (0.6%). In their latest 13Fs, 0 managers opened a new position and 1 added to one.
Has Congress traded PRME?
No member of Congress has disclosed a trade in PRME.
Who is the largest holder of PRME?
Among 13F filers, Alphabet Inc. reports the largest PRME position, $61.1M (16,562,498 shares) in its Q2 2026 13F. The biggest bet by portfolio weight is Alessandra Capital Management, LLC's: 1.7% of its portfolio.
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