SEC Insider Transactions from Taveras Arthur.

Last updated: 2026-03-14 11:18 UTC | Total transactions: 9

Taveras Arthur has filed 9 insider transactions across 1 company since February 2023.

Most recent transaction: a grant/award of 230645 shares of X4 Pharmaceuticals, Inc ($XFOR) on October 04, 2024.

Activity breakdown: 0 open-market purchases and 6 sales.

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Transaction Date Company Ticker Insider Name Title Transaction Type Security Shares Price Shares Owned Following Total Shares Outstanding % of Owned % of Outstanding
Oct. 4, 2024 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer A Common Stock 230645 $0.00 464,946.0000 6,695,509 98.44% 3.44%
Oct. 7, 2024 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer S Common Stock 76920 $0.56 388,026.0000 6,695,509 16.54% 1.15%
March 11, 2024 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer S Common Stock 14235 $0.88 234,301.0000 177,812,480 5.73% 0.01%
Feb. 13, 2024 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer A Stock Appreciation Right 428248 $0.00 428,248.0000 177,812,480 9999.99% 0.24%
Feb. 12, 2024 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer S Common Stock 787 $1.01 248,536.0000 177,812,480 0.32% 0.00%
Nov. 1, 2023 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer S Common Stock 67695 $0.73 249,323.0000 63,525,845 21.35% 0.11%
Oct. 31, 2023 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer A Common Stock 230645 $0.00 317,018.0000 63,525,845 267.03% 0.36%
March 10, 2023 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer S Common Stock 16806 $0.84 86,373.0000 63,525,845 16.29% 0.03%
Feb. 13, 2023 X4 Pharmaceuticals, Inc $XFOR Taveras Arthur Chief Scientific Officer S Common Stock 928 $0.93 103,179.0000 63,525,845 0.89% 0.00%