QUIDEL CORP

CUSIP: 74838J101 Class: COMMON STOCK

GAMCO INVESTORS, INC. ET AL's Holding History (CIK: 0000807249)

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

Q1 2022
Shares 191,517 Value ($000) $21,538 Avg Close — Range —
Q4 2021
Shares 186,442 Value ($000) $25,168 Avg Close — Range —
Q3 2021
Shares 211,815 Value ($000) $29,898 Avg Close — Range —
Q2 2021
Shares 216,640 Value ($000) $27,756 Avg Close — Range —
Q1 2021
Shares 203,823 Value ($000) $26,075 Avg Close — Range —
Q4 2020
Shares 207,800 Value ($000) $37,331 Avg Close — Range —
Q3 2020
Shares 294,500 Value ($000) $64,607 Avg Close — Range —
Q2 2020
Shares 349,100 Value ($000) $78,108 Avg Close — Range —
Q1 2020
Shares 431,300 Value ($000) $42,185 Avg Close — Range —
Q4 2019
Shares 434,100 Value ($000) $32,571 Avg Close — Range —
Q3 2019
Shares 436,100 Value ($000) $26,755 Avg Close — Range —
Q2 2019
Shares 455,900 Value ($000) $27,044 Avg Close — Range —
Q1 2019
Shares 498,800 Value ($000) $32,656 Avg Close — Range —
Q4 2018
Shares 505,700 Value ($000) $24,688 Avg Close — Range —
Q3 2018
Shares 507,700 Value ($000) $33,087 Avg Close — Range —
Q2 2018
Shares 540,700 Value ($000) $35,957 Avg Close — Range —
Q1 2018
Shares 565,200 Value ($000) $29,283 Avg Close — Range —
Q4 2017
Shares 565,200 Value ($000) $24,501 Avg Close — Range —
Q3 2017
Shares 569,700 Value ($000) $24,987 Avg Close — Range —
Q2 2017
Shares 626,100 Value ($000) $16,992 Avg Close — Range —
Q1 2017
Shares 626,100 Value ($000) $14,175 Avg Close — Range —
Q4 2016
Shares 626,100 Value ($000) $13,411 Avg Close — Range —
Q3 2016
Shares 626,100 Value ($000) $13,831 Avg Close — Range —
Q2 2016
Shares 626,100 Value ($000) $11,182 Avg Close — Range —
Q1 2016
Shares 624,100 Value ($000) $10,772 Avg Close — Range —
Q4 2015
Shares 600,000 Value ($000) $12,720 Avg Close — Range —
Q3 2015
Shares 600,000 Value ($000) $11,328 Avg Close — Range —
Q2 2015
Shares 600,000 Value ($000) $13,770 Avg Close — Range —
Q1 2015
Shares 600,000 Value ($000) $16,188 Avg Close — Range —
Q4 2014
Shares 600,000 Value ($000) $17,352 Avg Close — Range —
Q3 2014
Shares 600,000 Value ($000) $16,122 Avg Close — Range —
Q2 2014
Shares 601,000 Value ($000) $13,288 Avg Close — Range —
Q1 2014
Shares 601,000 Value ($000) $16,407 Avg Close — Range —
Q4 2013
Shares 601,000 Value ($000) $18,565 Avg Close — Range —
Q3 2013
Shares 603,091 Value ($000) $17,128 Avg Close — Range —
Q2 2013
Shares 593,091 Value ($000) $15,142 Avg Close — Range —