Y-MABS THERAPEUTICS INC

CUSIP: 984241109 Class: Common Stock

LOOMIS SAYLES & CO L P's Holding History (CIK: 0000312348)

Note: Option positions (PUT/CALL) are excluded.

Q1 2021
Shares 782,084 Value ($000) $23,650 Avg Close — Range —
Q4 2020
Shares 784,282 Value ($000) $38,830 Avg Close — Range —
Q3 2020
Shares 788,936 Value ($000) $30,288 Avg Close — Range —
Q2 2020
Shares 773,987 Value ($000) $33,436 Avg Close — Range —
Q1 2020
Shares 706,915 Value ($000) $18,450 Avg Close — Range —
Q4 2019
Shares 545,056 Value ($000) $17,034 Avg Close — Range —