Capital Research Global Investors
· Reduced
−$106M
Change
−7.9M
Δ Own
−61.1%
Date
Q1 2026
MG
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Capital Research Global Investors
· Reduced
−$106M
Change
−7.9M
Δ Own
−61.1%
Date
Q1 2026
|
Capital Research Global Investors | Reduced· Q1 2026 | −$106M | −7.9M | −61.1% | Q1 2026 | |||||
|
FMR LLC
· Reduced
−$29M
Change
−2.2M
Δ Own
−32.7%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | −$29M | −2.2M | −32.7% | Q1 2026 | |||||
|
Jane Street Group, LLC
· Added
+$17M
Change
+1.3M
Date
Q1 2026
|
Jane Street Group, LLC | Added· Q1 2026 | +$17M | +1.3M | – | Q1 2026 | |||||
|
Millennium Management LLC
· Added
+$16M
Change
+1.2M
Date
Q1 2026
|
Millennium Management LLC | Added· Q1 2026 | +$16M | +1.2M | – | Q1 2026 | |||||
|
Stephens Investment Management Group LLC
· Exited
−$15M
Change
−1.1M
Δ Own
−100.0%
Date
Q1 2026
|
Stephens Investment Management Group LLC | Exited· Q1 2026 | −$15M | −1.1M | −100.0% | Q1 2026 | |||||
|
Victory Capital Management Inc
· Added
+$15M
Change
+1.1M
Date
Q1 2026
|
Victory Capital Management Inc | Added· Q1 2026 | +$15M | +1.1M | – | Q1 2026 | |||||
|
Morgan Stanley
· Reduced
−$13M
Change
−936K
Date
Q1 2026
|
Morgan Stanley | Reduced· Q1 2026 | −$13M | −936K | – | Q1 2026 | |||||
|
Schonfeld Strategic Advisors LLC
· Added
+$11M
Change
+825K
Date
Q1 2026
|
Schonfeld Strategic Advisors LLC | Added· Q1 2026 | +$11M | +825K | – | Q1 2026 | |||||
|
J. Goldman & Co LP
· Exited
−$10M
Change
−783K
Δ Own
−100.0%
Date
Q1 2026
|
J. Goldman & Co LP | Exited· Q1 2026 | −$10M | −783K | −100.0% | Q1 2026 | |||||
|
Penn Capital Management Company, LLC
· Exited
−$9.3M
Change
−695K
Δ Own
−100.0%
Date
Q1 2026
|
Penn Capital Management Company, LLC | Exited· Q1 2026 | −$9.3M | −695K | −100.0% | Q1 2026 | |||||
|
Grizzlyrock Capital, LLC
· Added
+$8.9M
Change
+667K
Date
Q1 2026
|
Grizzlyrock Capital, LLC | Added· Q1 2026 | +$8.9M | +667K | – | Q1 2026 | |||||
|
American Century Companies Inc
· Reduced
−$8.8M
Change
−660K
Date
Q1 2026
|
American Century Companies Inc | Reduced· Q1 2026 | −$8.8M | −660K | – | Q1 2026 | |||||
|
Balyasny Asset Management L.P.
· Added
+$8.4M
Change
+627K
Date
Q1 2026
|
Balyasny Asset Management L.P. | Added· Q1 2026 | +$8.4M | +627K | – | Q1 2026 | |||||
|
Boston Partners
· Added
+$8.2M
Change
+611K
Date
Q1 2026
|
Boston Partners | Added· Q1 2026 | +$8.2M | +611K | – | Q1 2026 | |||||
|
Apis Capital Advisors, LLC
· Exited
−$8.1M
Change
−604K
Δ Own
−100.0%
Date
Q1 2026
|
Apis Capital Advisors, LLC | Exited· Q1 2026 | −$8.1M | −604K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Barrett Michael G.
· Director
Sell
−$785K
|
Barrett Michael G. | Director | Sell | $20.35 | −39K | −$785K | 403K | −8.7% | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Barrett Michael G.
· Director
2 operations
0
|
Barrett Michael G. | Director | 2 operations | $5.80 | 0 | – | 294K | – | Jul 15, 2026 | Jul 17, 2026 | |||||||||
|
Caine Paul
· Director
Sell
−$103K
|
Caine Paul | Director | Sell | $20.64 | −5K | −$103K | 162K | −3.0% | Jul 10, 2026 | Jul 14, 2026 | |||||||||
|
Buonasera David
· Officer
Sell
−$26K
|
Buonasera David | Officer | Sell | $21.00 | −1K | −$26K | 268K | −0.5% | Jul 7, 2026 | Jul 9, 2026 | |||||||||
|
Buckley Sean Patrick
· Officer
Sell
−$404K
|
Buckley Sean Patrick | Officer | Sell | $21.03 | −19K | −$404K | 354K | −5.1% | Jul 7, 2026 | Jul 9, 2026 | |||||||||
|
Buonasera David
· Officer
Sell
−$188K
|
Buonasera David | Officer | Sell | $20.00 | −9K | −$188K | 270K | −3.4% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Barrett Michael G.
· Director
Sell
−$1.5M
|
Barrett Michael G. | Director | Sell | $19.50 | −75K | −$1.5M | 403K | −15.7% | Jun 29, 2026 | Jul 1, 2026 | |||||||||
|
Barrett Michael G.
· Director
2 operations
0
|
Barrett Michael G. | Director | 2 operations | $5.80 | 0 | – | 333K | – | Jun 29, 2026 | Jul 1, 2026 | |||||||||
|
Buckley Sean Patrick
· Officer
Sell
−$365K
|
Buckley Sean Patrick | Officer | Sell | $19.00 | −19K | −$365K | 374K | – | Jun 17, 2026 | Jun 18, 2026 | |||||||||
|
Buonasera David
· Officer
Sell
−$27K
|
Buonasera David | Officer | Sell | $19.00 | −1K | −$27K | 279K | – | Jun 17, 2026 | Jun 17, 2026 | |||||||||
|
Knopper Douglas S.
· Director
Sell
−$676K
|
Knopper Douglas S. | Director | Sell | $18.10 | −37K | −$676K | 126K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Buonasera David
· Officer
Sell
−$202K
|
Buonasera David | Officer | Sell | $18.00 | −11K | −$202K | 280K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Barrett Michael G.
· Director
Sell
−$1.8M
|
Barrett Michael G. | Director | Sell | $17.50 | −100K | −$1.8M | 403K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Barrett Michael G.
· Director
2 operations
0
|
Barrett Michael G. | Director | 2 operations | $5.80 | 0 | – | 408K | – | Jun 16, 2026 | Jun 17, 2026 | |||||||||
|
Buonasera David
· Officer
Sell
−$18K
|
Buonasera David | Officer | Sell | $17.00 | −1K | −$18K | 292K | – | Jun 15, 2026 | Jun 17, 2026 | |||||||||
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289 reporting institutions disclosed MGNI position changes in the Q1 2026 snapshot.
For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.
An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.
Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.
Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.
A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.