Form 4 for PUBM PubMatic, Inc.
Accepted 2026-08-18 18:38:04 ET · period of report 2026-08-15 · accession 0001980851-26-000008 · SEC index · Original document
Summary rows
Aggregated the way they appear in lists: one row per insider, transaction code and security table.
| X | Filed | Traded | Ticker | Insider | Title | Type | Price | Qty | Owned | ΔOwn | Value |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DM | 2026-08-18 18:38 | 2026-08-15 | PUBM | Gimbel Lisa | CAO | M - OptEx | $0.00 | +3,762 | 18.3K | +26% | $0 |
| D | 2026-08-18 18:38 | 2026-05-18 | PUBM | Gimbel Lisa | CAO | S - Sale+OE | $17.04 | -1,396 | 16.9K | -8% | -$23.8K |
| DM | 2026-08-18 18:38 | 2026-08-15 | PUBM | Gimbel Lisa | CAO | M - OptEx | $0.00 | -3,762 | 11.1K | -25% | $0 |
Purchase Sale Sale after option exercise All abbreviations
Every reported transaction
| # | Table | Security | Date | Code | A/D | Shares | Price | Owned after | Own | Exercise / expiry | Underlying | Footnotes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Common | Class A Common Stock | 2026-08-15 | M | A | 1,395 | $0.00 | 15,956 | D | — | — | |
| 2 | Common | Class A Common Stock | 2026-08-15 | M | A | 772 | $0.00 | 16,728 | D | — | — | |
| 3 | Common | Class A Common Stock | 2026-08-15 | M | A | 801 | $0.00 | 17,529 | D | — | — | |
| 4 | Common | Class A Common Stock | 2026-08-15 | M | A | 794 | $0.00 | 18,323 | D | — | — | |
| 5 | Common | Class A Common Stock | 2026-05-18 | S | D | 1,396 | $17.04 | 16,927 | D | — | — | (F1) The sales reported on this line represent shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units ("RSUs"). The sales were to satisfy tax withholding obligations to be funded by a "sell to cover" transaction. (F2) The price reported in Column 4 is a weighted average price. These shares were sold as part of a block trade for multiple security holders of the Issuer at prices ranging from $16.84 to $17.37, inclusive. The Reporting Person undertakes to provide to the Issuer, any securityholder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein with regard to the block trade. |
| 6 | Derivative | Restricted Stock Units | 2026-08-15 | M | D | 1,395 | $0.00 | 5,580 | D | — · — to — | 1,395 Class A Common Stock | (F3) Each RSU represents a right to receive one share of the Issuer's Class A Common Stock at the time of vesting for no consideration. (F4) The RSUs vest as to 1/4 of the total shares on August 15, 2024, and 1/16th of the total shares will vest quarterly thereafter, subject to the Reporting Person's provision of service to the Issuer on each vesting date. (F5) RSUs do not expire; they either vest or are canceled prior to the vesting date. |
| 7 | Derivative | Restricted Stock Units | 2026-08-15 | M | D | 772 | $0.00 | 4,636 | D | — · — to — | 772 Class A Common Stock | (F3) Each RSU represents a right to receive one share of the Issuer's Class A Common Stock at the time of vesting for no consideration. (F6) The RSUs vest as to 1/16 of the total shares quarterly beginning on May 15, 2024, subject to the Reporting Person's provision of service to the Issuer on each vesting date. (F5) RSUs do not expire; they either vest or are canceled prior to the vesting date. |
| 8 | Derivative | Restricted Stock Units | 2026-08-15 | M | D | 801 | $0.00 | 8,013 | D | — · — to — | 801 Class A Common Stock | (F3) Each RSU represents a right to receive one share of the Issuer's Class A Common Stock at the time of vesting for no consideration. (F7) The RSUs vest as to 1/16 of the total shares quarterly beginning on May 15, 2025, subject to the Reporting Person's provision of service to the Issuer on each vesting date. (F5) RSUs do not expire; they either vest or are canceled prior to the vesting date. |
| 9 | Derivative | Restricted Stock Units | 2026-08-15 | M | D | 794 | $0.00 | 11,125 | D | — · — to — | 794 Class A Common Stock | (F3) Each RSU represents a right to receive one share of the Issuer's Class A Common Stock at the time of vesting for no consideration. (F8) The RSUs vest as to 1/16 of the total shares quarterly beginning on May 15, 2026, subject to the Reporting Person's provision of service to the Issuer on each vesting date. (F5) RSUs do not expire; they either vest or are canceled prior to the vesting date. |