William Blair Investment Management, LLC Mercury Systems Inc Transaction History

William Blair Investment Management, LLC

  • $35.8 Billion
  • Q3 2025

A detailed history of William Blair Investment Management, LLC transactions in Mercury Systems Inc stock. As of the latest transaction made, William Blair Investment Management, LLC holds 2,487,957 shares of MRCY stock, worth $176 Million. This represents 0.54% of its overall portfolio holdings.

Number of Shares
2,487,957
Previous 4,695,683 47.02%
Holding current value
$176 Million
Previous $253 Million 23.86%
% of portfolio
0.54%
Previous 0.73%

Shares

33 transactions
Quarter Operation Price Per share shares change shares Held SEC Form
Q3 2025

Nov 12, 2025
SELL
$50.09 - $77.4 $111 Million - $171 Million
-2,207,726 Reduced 47.02%
2,487,957 $193 Million
Q2 2025

Jul 29, 2025
SELL
$41.52 - $53.87 $28.1 Million - $36.4 Million
-676,515 Reduced 12.59%
4,695,683 $253 Million
Q1 2025

May 09, 2025
SELL
$39.67 - $49.88 $42.1 Million - $52.9 Million
-1,060,403 Reduced 16.48%
5,372,198 $231 Million
Q4 2024

Feb 10, 2025
SELL
$32.35 - $43.91 $28 Million - $38.1 Million
-866,911 Reduced 11.88%
6,432,601 $270 Million
Q3 2024

Nov 08, 2024
BUY
$28.35 - $40.12 $25 Million - $35.4 Million
883,063 Added 13.76%
7,299,512 $270 Million
Q2 2024

Aug 08, 2024
BUY
$26.61 - $32.45 $982,521 - $1.2 Million
36,923 Added 0.58%
6,416,449 $173 Million
Q1 2024

May 08, 2024
SELL
$26.23 - $36.05 $4.65 Million - $6.39 Million
-177,246 Reduced 2.7%
6,379,526 $188 Million
Q4 2023

Feb 09, 2024
SELL
$31.69 - $39.31 $6.11 Million - $7.58 Million
-192,790 Reduced 2.86%
6,556,772 $240 Million
Q3 2023

Nov 09, 2023
BUY
$33.4 - $40.38 $46 Million - $55.6 Million
1,376,905 Added 25.63%
6,749,562 $250 Million
Q2 2023

Aug 10, 2023
BUY
$31.5 - $52.36 $765,418 - $1.27 Million
24,299 Added 0.45%
5,372,657 $186 Million
Q1 2023

May 12, 2023
BUY
$44.56 - $56.19 $6.34 Million - $8 Million
142,390 Added 2.74%
5,348,358 $273 Million
Q4 2022

Feb 09, 2023
SELL
$41.78 - $53.58 $2.45 Million - $3.14 Million
-58,573 Reduced 1.11%
5,205,968 $233 Million
Q3 2022

Nov 09, 2022
BUY
$40.6 - $64.0 $32.1 Million - $50.6 Million
791,172 Added 17.69%
5,264,541 $214 Million
Q2 2022

Aug 10, 2022
SELL
$54.24 - $66.04 $7.25 Million - $8.82 Million
-133,629 Reduced 2.9%
4,473,369 $288 Million
Q1 2022

May 11, 2022
BUY
$51.11 - $69.81 $65.9 Million - $90 Million
1,289,176 Added 38.86%
4,606,998 $297 Million
Q4 2021

Feb 14, 2022
SELL
$46.71 - $55.92 $1.42 Million - $1.7 Million
-30,390 Reduced 0.91%
3,317,822 $183 Million
Q3 2021

Nov 10, 2021
SELL
$45.31 - $67.02 $1.7 Million - $2.52 Million
-37,615 Reduced 1.11%
3,348,212 $159 Million
Q2 2021

Aug 12, 2021
BUY
$57.69 - $79.28 $6.76 Million - $9.29 Million
117,183 Added 3.59%
3,385,827 $224 Million
Q1 2021

May 13, 2021
BUY
$61.26 - $85.49 $1.17 Million - $1.63 Million
19,080 Added 0.59%
3,268,644 $231 Million
Q4 2020

Feb 09, 2021
BUY
$67.1 - $88.06 $32.7 Million - $42.9 Million
487,709 Added 17.66%
3,249,564 $286 Million
Q3 2020

Nov 06, 2020
BUY
$66.65 - $81.23 $43.8 Million - $53.3 Million
656,735 Added 31.2%
2,761,855 $214 Million
Q2 2020

Aug 12, 2020
SELL
$68.26 - $92.8 $3.11 Million - $4.23 Million
-45,589 Reduced 2.12%
2,105,120 $166 Million
Q1 2020

May 08, 2020
BUY
$57.1 - $86.47 $108 Million - $163 Million
1,886,864 Added 715.14%
2,150,709 $153 Million
Q4 2019

Feb 12, 2020
BUY
$68.41 - $77.53 $4.23 Million - $4.79 Million
61,835 Added 30.61%
263,845 $18.2 Million
Q3 2019

Nov 12, 2019
SELL
$68.31 - $88.75 $3.79 Million - $4.92 Million
-55,426 Reduced 21.53%
202,010 $16.4 Million
Q2 2019

Aug 09, 2019
SELL
$63.79 - $75.55 $315,441 - $373,594
-4,945 Reduced 1.88%
257,436 $18.1 Million
Q1 2019

May 10, 2019
BUY
$43.11 - $65.87 $902,033 - $1.38 Million
20,924 Added 8.67%
262,381 $16.8 Million
Q4 2018

Feb 13, 2019
SELL
$41.61 - $55.01 $1.72 Million - $2.27 Million
-41,278 Reduced 14.6%
241,457 $11.4 Million
Q3 2018

Nov 13, 2018
BUY
$38.53 - $56.45 $1.44 Million - $2.11 Million
37,329 Added 15.21%
282,735 $15.6 Million
Q2 2018

Aug 14, 2018
BUY
$31.72 - $49.07 $2.54 Million - $3.92 Million
79,963 Added 48.33%
245,406 $9.34 Million
Q1 2018

May 14, 2018
SELL
$41.82 - $51.71 $125,418 - $155,078
-2,999 Reduced 1.78%
165,443 $7.99 Million
Q4 2017

Feb 14, 2018
SELL
$48.12 - $53.99 $1.3 Million - $1.45 Million
-26,948 Reduced 13.79%
168,442 $8.65 Million
Q3 2017

Nov 13, 2017
BUY
$43.53 - $51.88 $8.51 Million - $10.1 Million
195,390
195,390 $10.1 Million

Others Institutions Holding MRCY

# of Institutions
351
Shares Held
63M
Call Options Held
119K
Put Options Held
109K
View Full List

About MERCURY SYSTEMS INC

MRCY Quotes by TradingView
  • Ticker MRCY
  • Exchange NASDAQ
  • Sector Industrials
  • Industry Aerospace & Defense
  • Shares Outstandng 57,778,700
  • Market Cap $4.09B
  • Description
  • Mercury Systems, Inc., a technology company, manufactures and sells components, products, modules, and subsystems for aerospace and defense industries in the United States, Europe, and the Asia Pacific. Its products and solutions are deployed in approximately 300 programs with 25 defense contractors and commercial aviation customers. The company...
More about MRCY
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