Contour Asset Management LLC
· Reduced
−$113M
Change
−6.1M
Date
Q1 2026
ZE
| Investor | Type | Est. change | Change | Δ Own | Date | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Contour Asset Management LLC
· Reduced
−$113M
Change
−6.1M
Date
Q1 2026
|
Contour Asset Management LLC | Reduced· Q1 2026 | −$113M | −6.1M | – | Q1 2026 | |||||
|
Norges
· Exited
−$43M
Change
−2.3M
Δ Own
−100.0%
Date
Q1 2026
|
Norges | Exited· Q1 2026 | −$43M | −2.3M | −100.0% | Q1 2026 | |||||
|
Annex Advisory Services, LLC
· Reduced
−$35M
Change
−1.9M
Date
Q1 2026
|
Annex Advisory Services, LLC | Reduced· Q1 2026 | −$35M | −1.9M | – | Q1 2026 | |||||
|
Granahan Investment Management, LLC
· Reduced
−$30M
Change
−1.6M
Date
Q1 2026
|
Granahan Investment Management, LLC | Reduced· Q1 2026 | −$30M | −1.6M | – | Q1 2026 | |||||
|
FMR LLC
· Reduced
−$30M
Change
−1.6M
Δ Own
−89.4%
Date
Q1 2026
|
FMR LLC | Reduced· Q1 2026 | −$30M | −1.6M | −89.4% | Q1 2026 | |||||
|
UBS AM
· Reduced
−$29M
Change
−1.6M
Date
Q1 2026
|
UBS AM | Reduced· Q1 2026 | −$29M | −1.6M | – | Q1 2026 | |||||
|
Portolan Capital Management, LLC
· Reduced
−$15M
Change
−833K
Date
Q1 2026
|
Portolan Capital Management, LLC | Reduced· Q1 2026 | −$15M | −833K | – | Q1 2026 | |||||
|
P2 Capital Partners, LLC
· Reduced
−$15M
Change
−785K
Date
Q1 2026
|
P2 Capital Partners, LLC | Reduced· Q1 2026 | −$15M | −785K | – | Q1 2026 | |||||
|
O'Neil Global Advisors, Inc.
· Exited
−$11M
Change
−614K
Δ Own
−100.0%
Date
Q1 2026
|
O'Neil Global Advisors, Inc. | Exited· Q1 2026 | −$11M | −614K | −100.0% | Q1 2026 | |||||
|
Deutsche Bank AG
· Reduced
−$11M
Change
−596K
Date
Q1 2026
|
Deutsche Bank AG | Reduced· Q1 2026 | −$11M | −596K | – | Q1 2026 | |||||
|
Summit Partners Public Asset Management, LLC
· Reduced
−$11M
Change
−574K
Date
Q1 2026
|
Summit Partners Public Asset Management, LLC | Reduced· Q1 2026 | −$11M | −574K | – | Q1 2026 | |||||
|
Ophir Asset Management Pty Ltd
· Reduced
−$10M
Change
−553K
Date
Q1 2026
|
Ophir Asset Management Pty Ltd | Reduced· Q1 2026 | −$10M | −553K | – | Q1 2026 | |||||
|
T. Rowe Price Associates
· Reduced
−$9.8M
Change
−530K
Date
Q1 2026
|
T. Rowe Price Associates | Reduced· Q1 2026 | −$9.8M | −530K | – | Q1 2026 | |||||
|
Tudor Investment Corp Et Al
· Reduced
−$9.8M
Change
−529K
Date
Q1 2026
|
Tudor Investment Corp Et Al | Reduced· Q1 2026 | −$9.8M | −529K | – | Q1 2026 | |||||
|
Capital Fund Management S.A.
· Exited
−$8.8M
Change
−475K
Δ Own
−100.0%
Date
Q1 2026
|
Capital Fund Management S.A. | Exited· Q1 2026 | −$8.8M | −475K | −100.0% | Q1 2026 | |||||
| Insider | Title | Type | Price | Qty | Value | Owned | ΔOwn | Trade date | Filed date | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Niehaus Robert H.
· Director
Grant (A)
7K
|
Niehaus Robert H. | Director | Grant (A) | – | 7K | – | 612K | +1.2% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Silberblatt Jeanine
· Director
Grant (A)
7K
|
Silberblatt Jeanine | Director | Grant (A) | – | 7K | – | 58K | +14.3% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Landman William
· Director
2 operations
8K
|
Landman William | Director | 2 operations | $19.68 | 8K | – | 272K | +3.2% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Royan William T.
· Director
Grant (A)
7K
|
Royan William T. | Director | Grant (A) | – | 7K | – | 83K | +9.5% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Elzie Jene
· Director
Grant (A)
7K
|
Elzie Jene | Director | Grant (A) | – | 7K | – | 70K | +11.5% | Jul 1, 2026 | Jul 2, 2026 | |||||||||
|
Silberblatt Jeanine
· Director
Sell
−$149K
|
Silberblatt Jeanine | Director | Sell | $19.89 | −8K | −$149K | 50K | – | Jun 12, 2026 | Jun 12, 2026 | |||||||||
|
Ravella Satish
· Officer
Gift (G)
-8K
|
Ravella Satish | Officer | Gift (G) | – | -8K | – | 181K | – | Jun 4, 2026 | Jun 4, 2026 | |||||||||
|
Ravella Satish
· Officer
2 operations
0
|
Ravella Satish | Officer | 2 operations | $12.56 | 0 | – | 75K | – | Jun 2, 2026 | Jun 4, 2026 | |||||||||
|
Ravella Satish
· Officer
Tax withholding or exercise payment (F)
-$437K
|
Ravella Satish | Officer | Tax withholding or exercise payment (F) | $25.25 | -17K | -$437K | 189K | – | Jun 2, 2026 | Jun 4, 2026 | |||||||||
|
Gerber Steven H.
· Officer
Gift (G)
-724K
|
Gerber Steven H. | Officer | Gift (G) | – | -724K | – | 154K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Greiner Christopher E.
· CFO
Gift (G)
-633K
|
Greiner Christopher E. | CFO | Gift (G) | – | -633K | – | 144K | – | May 20, 2026 | May 22, 2026 | |||||||||
|
Niehaus Robert H.
· Director
2 operations
0
|
Niehaus Robert H. | Director | 2 operations | – | 0 | – | 60K | – | May 7, 2026 | May 12, 2026 | |||||||||
|
Steinberg David
· Director
4 operations
-1.3M
|
Steinberg David | Director | 4 operations | – | -1.3M | – | 67K | – | May 6, 2026 | May 8, 2026 | |||||||||
|
Landman William
· Director
Grant (A)
$25K
|
Landman William | Director | Grant (A) | $15.92 | 2K | $25K | 264K | – | Apr 1, 2026 | Apr 3, 2026 | |||||||||
|
Elzie Jene
· Director
Shares transferred outside the market (D), often for tax or as a gift, not a market sale
-$75K
|
Elzie Jene | Director | Shares transferred outside the market (D), often for tax or as a gift, not a market sale | $18.24 | -4K | -$75K | 62K | – | Mar 11, 2026 | Mar 13, 2026 | |||||||||
N
A
M
G
A
A
396 reporting institutions disclosed ZETA 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.