Sumant Mandal
CIK 1603810 · View on SEC EDGAR ↗
Insider
First SEC filing: April 1, 2014 · Latest: April 1, 2014
On this page
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net:
$0
+ 30 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
No open-market trades on record; showing all filings.
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Feb. 25, 2019 | MGNI | J | 508,938 | — | — | 1,548,980 Indirect | -24.73% | Disposed | (price as of 2026-08-20) |
| Feb. 25, 2019 | MGNI | J | 1,746 | — | — | 44,988 Direct | +4.04% | Acquired | (price as of 2026-08-20) |
| Jan. 28, 2019 | MGNI | J | 508,938 | — | — | 2,057,918 Indirect | -19.83% | Disposed | (price as of 2026-08-20) |
| Jan. 28, 2019 | MGNI | J | 1,746 | — | — | 43,242 Direct | +4.21% | Acquired | (price as of 2026-08-20) |
| May 13, 2015 | MGNI | A | 11,759 | — | — | 11,759 Direct | — | Acquired | (price as of 2026-08-20) |
| May 13, 2015 | MGNI | A | 4,886 | — | — | 26,169 Direct | +22.96% | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 19,562 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 1,094,310 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 12,470 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 697,562 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 69,580 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 3,892,410 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 108,076 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 6,045,924 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 13,208 | — | — | 13,208 Direct | — | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 13,208 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 29,184 | — | — | 29,184 Direct | — | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 29,184 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 110,640 | — | — | 110,640 Indirect | — | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 110,640 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 6,189,340 | — | — | 6,189,340 Indirect | — | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 6,189,340 | — | — | 0 Indirect | -100.00% | Disposed | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 104,844 | — | — | 110,640 Indirect | +1808.90% | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | C | 5,865,103 | — | — | 6,189,340 Indirect | +1808.89% | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 21,283 | — | — | 21,283 Direct | — | Acquired | (price as of 2026-08-20) |
| April 7, 2014 | MGNI | J | 21,283 | — | — | 0 Direct | -100.00% | Disposed | (price as of 2026-08-20) |
| April 1, 2014 | MGNI | A | 13,208 | — | — | 13,208 Direct | — | Acquired | (price as of 2026-08-20) |
| April 1, 2014 | MGNI | A | 29,184 | — | — | 29,184 Direct | — | Acquired | (price as of 2026-08-20) |
| April 1, 2014 | MGNI | A | 6,283 | — | — | 21,283 Direct | +41.89% | Acquired | (price as of 2026-08-20) |
| April 1, 2014 | MGNI | A | 15,000 | — | — | 15,000 Direct | — | Acquired | (price as of 2026-08-20) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| May 13, 2015 | MGNI | Stock Option (right to buy) | Common Stock (11,759) | $17.91 | May 13, 2025 | 11,759 | Acquired |
| April 7, 2014 | MGNI | Series D Convertible Preferred Stock | Class A Common Stock | — | — | 19,562 | Disposed |
| April 7, 2014 | MGNI | Series D Convertible Preferred Stock | Class A Common Stock | — | — | 1,094,310 | Disposed |
| April 7, 2014 | MGNI | Series C Convertible Preferred Stock | Class A Common Stock | — | — | 12,470 | Disposed |
| April 7, 2014 | MGNI | Series C Convertible Preferred Stock | Class A Common Stock | — | — | 697,562 | Disposed |
| April 7, 2014 | MGNI | Series B Convertible Preferred Stock | Class A Common Stock | — | — | 69,580 | Disposed |
| April 7, 2014 | MGNI | Series B Convertible Preferred Stock | Class A Common Stock | — | — | 3,892,410 | Disposed |
| April 7, 2014 | MGNI | Series A Convertible Preferred Stock | Class A Common Stock | — | — | 108,076 | Disposed |
| April 7, 2014 | MGNI | Series A Convertible Preferred Stock | Class A Common Stock | — | — | 6,045,924 | Disposed |
| April 7, 2014 | MGNI | Stock Option (Right to Buy) | Class A Common Stock (13,208) | $15.00 | April 1, 2024 | 13,208 | Acquired |
| April 7, 2014 | MGNI | Stock Option (Right to Buy) | Class A Common Stock (13,208) | $15.00 | April 1, 2024 | 13,208 | Disposed |
| April 7, 2014 | MGNI | Stock Option (Right to Buy) | Class A Common Stock (29,184) | $15.00 | April 1, 2024 | 29,184 | Acquired |
| April 7, 2014 | MGNI | Stock Option (Right to Buy) | Class A Common Stock (29,184) | $15.00 | April 1, 2024 | 29,184 | Disposed |
| April 1, 2014 | MGNI | Stock Option (Right to Buy) | Class A Common Stock (13,208) | $15.00 | April 1, 2024 | 13,208 | Acquired |
| April 1, 2014 | MGNI | Stock Option (Right to Buy) | Class A Common Stock (29,184) | $15.00 | April 1, 2024 | 29,184 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 10 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| April 1, 2014 | MGNI | Class A Common Stock [F1] | 324,237 | Indirect |
| April 1, 2014 | MGNI | Class A Common Stock [F1] | 5,796 | Indirect |
| April 1, 2014 | MGNI | Series A Convertible Preferred Stock→ Class A Common Stock [F1] (3,022,962) | 3,022,962 | Indirect |
| April 1, 2014 | MGNI | Series A Convertible Preferred Stock→ Class A Common Stock [F1] (54,038) | 54,038 | Indirect |
| April 1, 2014 | MGNI | Series B Convertible Preferred Stock→ Class A Common Stock [F1] (1,946,205) | 1,946,205 | Indirect |
| April 1, 2014 | MGNI | Series B Convertible Preferred Stock→ Class A Common Stock [F1] (34,790) | 34,790 | Indirect |
| April 1, 2014 | MGNI | Series C Convertible Preferred Stock→ Class A Common Stock [F1] (348,781) | 348,781 | Indirect |
| April 1, 2014 | MGNI | Series C Convertible Preferred Stock→ Class A Common Stock [F1] (6,235) | 6,235 | Indirect |
| April 1, 2014 | MGNI | Series D Convertible Preferred Stock→ Class A Common Stock [F1] (547,155) | 547,155 | Indirect |
| April 1, 2014 | MGNI | Series D Convertible Preferred Stock→ Class A Common Stock [F1] (9,781) | 9,781 | Indirect |