Security key
74467Q103
PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (PUBM)
CUSIP: 74467Q103
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Class A Common Stock, par value $0.0001 per share
- Total 13F shares
- 28,841,151
- Total 13F value
- $235,949,316
- Share change
- +1,140,347
- Put/Call ratio
- 129%
- SEC-reported price per share
- $8.18
- Number of holders
- 152
- Value change
- +$7,575,205
- Number of buys
- 87
- Number of sells
- 69
- Shares outstanding
- 38,189,933
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
Q1 2026
Institutions
152
Top holders
10
PUBM full security history
Ownership snapshot
Full 13F holder table
PubMatic, Inc. SEC filings
PubMatic, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of PUBM - PubMatic, Inc. - Class A Common Stock, par value $0.0001 per share (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
Graham Holdings Co
Disclosed value leader
NEXUS INDIA CAPITAL I L P
Comparable rows
3/15
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 8.9%
12 rows are not safely comparable across share classes.
13D/G row: Graham Holdings Co
Showing 1-6 of 15 holder rows.
Quick read
Graham Holdings Co leads the comparable SEC ownership view at 8.9%.
3 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 Graham Holdings Co's linked filing trail.
Comparable ownership
Top 3
Graham Holdings Co
8.9%
BlackRock, Inc.
7.1%
VANGUARD GROUP INC
6.5%
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 |
|---|---|---|---|---|---|
| Graham Holdings Co |
13D/G
13F
Graham Holdings Company · Company
|
8.9%
Reported 13D/G
· 31 Mar 2026
|
$27,803,035
3,398,904 shares
|
+$4,641,676 | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
7.1%
Reported 13D/G
· 31 Dec 2025
|
$27,702,491
3,123,167 shares
|
— | 31 Dec 2025 |
| VANGUARD GROUP INC |
13D/G
13F
The Vanguard Group · Company
|
6.5%
Reported 13D/G
· 30 Jun 2025
|
$32,483,067
2,611,179 shares
|
-$9,982,155 | 30 Jun 2025 |
| NEXUS INDIA CAPITAL I L P |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$39,980,034
2,624,843 shares
|
— | 12 Nov 2021 |
| Helion Venture Partners LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$36,664,737
2,407,181 shares
|
— | 29 Nov 2021 |
| August Capital Management V, L.L.C. |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
$32,569,910
2,136,638 shares
mixed-class rows
|
— | 15 Nov 2021 |
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 Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
152
Shares
28,841,151
Rows available
152
| 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 Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
152
Q1 2026 holders
152
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|