Security key
589378108
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 65,624,441
- Total 13F value
- $8,015,009,654
- Share change
- +449,407
- Put/Call ratio
- 81%
- SEC-reported price per share
- $122.33
- Number of holders
- 391
- Value change
- +$94,975,153
- Number of buys
- 209
- Number of sells
- 176
- Shares outstanding
- 60,158,713
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
391
Top holders
10
MRCY full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2026
MERCURY SYSTEMS INC SEC filings
MERCURY SYSTEMS INC company facts
Broader feeds
Reporting periods
Holder history for CUSIP 589378108
Recent filing periods:
Ownership snapshot
Top reported holders of MRCY - MERCURY SYSTEMS INC - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
30 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 14%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
14%
JANA Partners Management, LP
6.9%
STATE STREET CORP
6.4%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.1%
WILLIAM BLAIR INVESTMENT MANAGEME...
4.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13D/G
13F
Company
|
14%
|
$1,054,426,738
8,619,527 shares
|
+$79,181,028 | 30 Jun 2026 |
| JANA Partners Management, LP |
3/4/5
13D/G
13F
Director, Other* · Company
|
6.9%
from 13D/G
|
$368,998,942
4,114,618 shares
|
-$149,262,246 | 02 Mar 2026 |
| STATE STREET CORP |
13D/G
13F
STATE STREET CORPORATION · Company
|
6.4%
|
$307,711,232
3,865,719 shares
|
+$69,931,306 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.1%
|
$333,241,613
3,086,142 shares
|
$0 | 30 Jun 2026 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC |
13D/G
13F
Company
|
4.2%
|
$195,522,694
2,526,133 shares
|
-$167,923,170 | 30 Sep 2025 |
| Orlando D. Carvalho |
3/4/5
Director
|
0.09%
|
$4,686,805
52,448 shares
|
-$625,527 | 12 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
391
Shares
65,624,441
Rows available
391
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
357
Q2 2026 holders
391
Holder diff
34
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend