Insider · CIK 0001587114
EcoR1 Capital, LLC
ownerdirector
Files at ANAB (ANAPTYSBIO, INC), MRSN (Mersana Therapeutics, Inc.), TNGX (Tango Therapeutics, Inc.), ZYME (Zymeworks Inc.). First filing Nov 8, 2024, latest Mar 27, 2025.
Track record
Not enough history
Fewer than three past buys with six months of prices.
Median 6-month excess
-
after past buys, n = 0
Hit rate
-
past buys that beat the index over 6 months
Open-market trades
11 / 1
$52M bought, $8.4M sold
Where the trades landed
Last year at the 3 companies this insider has traded most, with each buy and sell on the bar it happened.
ZYME: Zymeworks Inc.
ZYMEOct 9, 2026 · close 25.79
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
ANAB: ANAPTYSBIO, INC
ANABOct 9, 2026 · close 45.95
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
TNGX: Tango Therapeutics, Inc.
TNGXOct 9, 2026 · close 23.81
Daily candles, adjusted for splits and dividends. Green arrows are insider buys, red are sells, sized by value. Click a marked bar to open the signal.Charts by TradingView Lightweight Charts™
Signals
This insider’s open-market buys and sells, scored.
| Score | Company | Value | Holdings | Price context | Filed |
|---|---|---|---|---|---|
| 44Moderate | ZYMEbuy Zymeworks Inc. | $1.2M 97,349 shares | +1% | +15% from low-26% from high | |
| 44Moderate | ZYMEbuy Zymeworks Inc. | $1.6M 127,198 shares | +1% | +16% from low-26% from high | |
| 49Moderate | ZYMEbuy Zymeworks Inc. | $2.9M 228,463 shares | +1% | +13% from low-28% from high | |
| 66Notable | ZYMEbuy Zymeworks Inc. | $13M 1,081,980 shares | +7% | +5% from low-33% from high | |
| 44Moderate | ZYMEbuy Zymeworks Inc. | $2.0M 141,429 shares | +1% | +16% from low-20% from high | |
| 49Moderate | ZYMEbuy Zymeworks Inc. | $2.3M 167,654 shares | +1% | +15% from low-20% from high | |
| 49Moderate | ZYMEbuy Zymeworks Inc. | $3.0M 225,119 shares | +1% | +17% from low-19% from high | |
| 58Moderate | ANABbuy ANAPTYSBIO, INC | $1.1M 85,098 shares | +1% | +1% from low-67% from high | |
| 49Moderate | ZYMEbuy Zymeworks Inc. | $5.3M 363,369 shares | +2% | +20% from low-17% from high | |
| 44Moderate | ZYMEbuy Zymeworks Inc. | $1.9M 130,309 shares | +1% | +17% from low-19% from high | |
| 47Moderate | ZYMEbuy Zymeworks Inc. | $18M 1,254,808 shares | +9% | +12% from low-22% from high | |
| 50Moderate | Tango Therapeutics, Inc. | $8.4M 2,700,000 shares | -20% | - |
Transactions
Every row this insider has filed, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Mar 25, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +53,501 | $12.91 | $690k | 17,211,303 | Mar 27, 2025 |
| Mar 26, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +43,848 | $12.24 | $537k | 17,255,151 | Mar 27, 2025 |
| Mar 20, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +73,476 | $12.93 | $950k | 17,104,080 | Mar 24, 2025 |
| Mar 21, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +31,033 | $12.78 | $397k | 17,135,113 | Mar 24, 2025 |
| Mar 24, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +22,689 | $13.08 | $297k | 17,157,802 | Mar 24, 2025 |
| Mar 17, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +56,277 | $12.23 | $688k | 16,858,418 | Mar 19, 2025 |
| Mar 18, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +113,880 | $12.65 | $1.4M | 16,972,298 | Mar 19, 2025 |
| Mar 19, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +58,306 | $12.64 | $737k | 17,030,604 | Mar 19, 2025 |
| Mar 11, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +320,690 | $11.49 | $3.7M | 16,040,851 | Mar 13, 2025 |
| Mar 12, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +292,934 | $12.25 | $3.6M | 16,333,785 | Mar 13, 2025 |
| Mar 13, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +468,356 | $12.48 | $5.8M | 16,802,141 | Mar 13, 2025 |
| Jan 16, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +121,681 | $13.89 | $1.7M | 15,700,413 | Jan 21, 2025 |
| Jan 17, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +19,748 | $13.87 | $274k | 15,720,161 | Jan 21, 2025 |
| Jan 13, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +74,125 | $13.39 | $993k | 15,485,203 | Jan 15, 2025 |
| Jan 14, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +54,500 | $13.56 | $739k | 15,539,703 | Jan 15, 2025 |
| Jan 15, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +39,029 | $14.01 | $547k | 15,578,732 | Jan 15, 2025 |
| Jan 8, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +21,021 | $14.07 | $296k | 15,206,980 | Jan 10, 2025 |
| Jan 10, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +204,098 | $13.13 | $2.7M | 15,411,078 | Jan 10, 2025 |
| Dec 30, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +58,988 | $14.47 | $853k | 14,881,578 | Jan 2, 2025 |
| Dec 30, 2024 | ANAB ANAPTYSBIO, INC | POpen-market purchase Common Stockindirect: See Note | +65,184 | $12.92 | $842k | 7,860,180 | Jan 2, 2025 |
| Dec 31, 2024 | ANAB ANAPTYSBIO, INC | POpen-market purchase Common Stockindirect: See Note | +13,268 | $12.93 | $172k | 7,873,448 | Jan 2, 2025 |
| Dec 31, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +146,501 | $14.57 | $2.1M | 15,028,079 | Jan 2, 2025 |
| Jan 2, 2025 | ANAB ANAPTYSBIO, INC | POpen-market purchase Common Stockindirect: See Note | +6,646 | $12.95 | $86k | 7,880,094 | Jan 2, 2025 |
| Jan 2, 2025 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +157,880 | $14.78 | $2.3M | 15,185,959 | Jan 2, 2025 |
| Dec 24, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +11,958 | $14.12 | $169k | 14,704,239 | Dec 27, 2024 |
| Dec 26, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +16,692 | $14.38 | $240k | 14,720,931 | Dec 27, 2024 |
| Dec 27, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +101,659 | $14.49 | $1.5M | 14,822,590 | Dec 27, 2024 |
| Dec 19, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +298,818 | $13.53 | $4.0M | 13,736,291 | Dec 26, 2024 |
| Dec 20, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +704,488 | $14.08 | $9.9M | 14,440,779 | Dec 26, 2024 |
| Dec 23, 2024 | ZYME Zymeworks Inc. | POpen-market purchase Common Stockindirect: See Note | +251,502 | $14.25 | $3.6M | 14,692,281 | Dec 26, 2024 |
| Dec 19, 2024 | MRSN Mersana Therapeutics, Inc. | JOther Common Stockindirect: See Note | -8,036,688 | - | - | 11,328,000 | Dec 23, 2024 |
| Dec 26, 2023 | ZYME Zymeworks Inc. | POpen-market purchase Pre-Funded Warrantsderivativeindirect: See note | +5,086,521 | $9.83 | $50M | 5,086,521 | Dec 23, 2024 |
| Dec 19, 2024 | MRSN Mersana Therapeutics, Inc. | JOther Pre-Funded Warrantsderivativeindirect: See Note | +8,036,688 | - | - | 8,036,688 | Dec 23, 2024 |
| Nov 6, 2024 | TNGX Tango Therapeutics, Inc. | SOpen-market sale Common Stockindirect: See Note | -1,494,558 | $3.28 | $4.9M | 11,836,178 | Nov 8, 2024 |
| Nov 7, 2024 | TNGX Tango Therapeutics, Inc. | SOpen-market sale Common Stockindirect: See Note | -62,318 | $3.29 | $205k | 11,773,860 | Nov 8, 2024 |
| Nov 7, 2024 | TNGX Tango Therapeutics, Inc. | SOpen-market sale Common Stockindirect: See Note | -1,143,124 | $2.92 | $3.3M | 10,630,736 | Nov 8, 2024 |
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.