Form 13-F position report

DAWSON GEOPHYSICAL CO

Reported by GREAT LAKES ADVISORS LLC

DWSN CUSIP 239359102 Manager CIK 0001078013

Reported 0 shares, down 231,700 (100.0%) from the prior quarter.

Reported value -100.0%; share count -100.0% vs. the prior quarter.

Reduced
% of reported 13F value 0 This manager · Q1 2015
Shares 0 Quarter-end amount reported
Reported value $0 Fair value at quarter end
Consecutive quarters held 8 Through Q1 2015

Reported position value by quarter

Reported position value by quarter

Each bar is a Form 13-F quarter-end snapshot. It does not show trades made within the quarter.

Reported position value by quarter
Date Holding Value

Quarterly position history

How this manager's reported quarter-end position changed over time.

0 quarters
Quarterly reported position history for DAWSON GEOPHYSICAL CO held by GREAT LAKES ADVISORS LLC.
Quarter Activity Shares Change % of reported 13F Reported value Filed Source filing
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Who else reported the position

69 managers reported DAWSON GEOPHYSICAL CO for Q1 2015.

Managers reporting DAWSON GEOPHYSICAL CO in Q1 2015.
Manager Activity Shares Change % of reported 13F Reported value Tenure
BEDDOW CAPITAL MANAGEMENT INC Added 816,386 +436,662 1.22% $3,486,000 8 qtrs
Oslo Asset Management AS Added 176,000 +76,000 0.7% $752,000 2 qtrs
PERRITT CAPITAL MANAGEMENT INC New 174,595 +174,595 0.13% $746,000 1 qtr
CALIFORNIA PUBLIC EMPLOYEES RETIREMENT SYSTEM Unchanged 39,900 0 < 0.01% $444,000 8 qtrs
Adams Asset Advisors LLC Added 76,098 +32,860 0.06% $324,000 4 qtrs
ROBOTTI ROBERT New 6,127 +6,127 0.01% $26,000 1 qtr
DEUTSCHE BANK AG Reduced 0 -10,709 0 $0 7 qtrs
WELLS FARGO & COMPANY MN Reduced 0 -728 0 $0 8 qtrs
Teton Advisors Inc Reduced 0 -12,000 0 $0 8 qtrs
US BANCORP DE Reduced 0 -68,928 0 $0 8 qtrs
Premium adds each manager's conviction percentile across reporting peers.
Filing details and methodology As reported
Report period
March 31, 2015
Filed
May 06, 2015
Filing type
13F-HR
Position type
CS

Voting authority reported

No voting-authority amounts were reported for this position. Voting authority is not required for reported call options.

Form 13-F is a delayed quarter-end snapshot of disclosed long Section 13(f) securities. It can be filed up to 45 days after quarter end, excludes short positions and most non-U.S. securities, and does not reveal intra-quarter trading. For options, reported shares and value describe the underlying-share exposure; strike, expiry, premium, and written positions are not disclosed.