Gregory Serio
Insider
First SEC filing: June 1, 2012 · Latest: May 19, 2026
Insider at
Insider transactions
0 buys (P)
0 sells (S)
Net: $0
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| May 15, 2026 | RDN | M | 4,837 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 15, 2026 | RDN | F | 5 | $36.93 | $185 | 10,274 Direct | -0.05% | Disposed | -11.8% (price as of 2026-10-02) |
| May 15, 2026 | RDN | M | 4,837 | · | · | 10,279 Direct | +88.88% | Acquired | (price as of 2026-10-02) |
| May 21, 2025 | RDN | A | 4,837 | · | · | 4,837 Direct | · | Acquired | (price as of 2026-10-02) |
| May 15, 2025 | RDN | M | 5,109 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 15, 2025 | RDN | F | 11 | $34.04 | $374 | 5,442 Direct | -0.20% | Disposed | -4.3% (price as of 2026-10-02) |
| May 15, 2025 | RDN | M | 5,109 | · | · | 5,453 Direct | +1485.17% | Acquired | (price as of 2026-10-02) |
| Feb. 28, 2025 | RDN | S | 4,100 | $32.65 | $133,865 | 344 Direct | -92.26% | Disposed | -0.2% (price as of 2026-10-02) |
| May 23, 2024 | RDN | S | 9,663 | $31.04 | $299,940 | 4,444 Direct | -68.50% | Disposed | 4.9% (price as of 2026-10-02) |
| May 22, 2024 | RDN | A | 5,109 | · | · | 5,109 Direct | · | Acquired | (price as of 2026-10-02) |
| May 15, 2024 | RDN | M | 5,899 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 15, 2024 | RDN | F | 13 | $31.34 | $407 | 14,107 Direct | -0.09% | Disposed | 3.9% (price as of 2026-10-02) |
| May 15, 2024 | RDN | M | 5,899 | · | · | 14,120 Direct | +71.76% | Acquired | (price as of 2026-10-02) |
| Aug. 17, 2023 | RDN | S | 3,800 | $26.82 | $101,916 | 8,221 Direct | -31.61% | Disposed | 21.4% (price as of 2026-10-02) |
| May 19, 2023 | RDN | S | 11,000 | $25.72 | $282,920 | 12,021 Direct | -47.78% | Disposed | 26.6% (price as of 2026-10-02) |
| May 17, 2023 | RDN | A | 5,899 | · | · | 5,899 Direct | · | Acquired | (price as of 2026-10-02) |
| May 15, 2023 | RDN | M | 7,083 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 15, 2023 | RDN | F | 6 | $25.04 | $150 | 23,021 Direct | -0.03% | Disposed | 30.1% (price as of 2026-10-02) |
| May 15, 2023 | RDN | M | 7,083 | · | · | 23,027 Direct | +44.42% | Acquired | (price as of 2026-10-02) |
| May 15, 2022 | RDN | M | 5,986 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 15, 2022 | RDN | F | 4 | $21.19 | $85 | 15,944 Direct | -0.03% | Disposed | 53.7% (price as of 2026-10-02) |
| May 15, 2022 | RDN | M | 5,986 | · | · | 15,948 Direct | +60.09% | Acquired | (price as of 2026-10-02) |
| May 11, 2022 | RDN | A | 7,083 | · | · | 7,083 Direct | · | Acquired | (price as of 2026-10-02) |
| May 13, 2021 | RDN | M | 9,962 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 13, 2021 | RDN | M | 9,962 | · | · | 9,962 Direct | · | Acquired | (price as of 2026-10-02) |
| May 12, 2021 | RDN | A | 5,986 | · | · | 5,986 Direct | · | Acquired | (price as of 2026-10-02) |
| May 13, 2020 | RDN | A | 9,962 | · | · | 9,962 Direct | · | Acquired | (price as of 2026-10-02) |
| May 15, 2019 | RDN | A | 5,768 | · | · | 5,768 Direct | · | Acquired | (price as of 2026-10-02) |
| May 9, 2018 | RDN | A | 7,833 | · | · | 7,833 Direct | · | Acquired | (price as of 2026-10-02) |
| May 10, 2017 | RDN | A | 6,924 | · | · | 6,924 Direct | · | Acquired | (price as of 2026-10-02) |
| May 11, 2016 | RDN | A | 9,458 | · | · | 9,458 Direct | · | Acquired | (price as of 2026-10-02) |
| May 13, 2015 | RDN | A | 6,333 | · | · | 6,333 Direct | · | Acquired | (price as of 2026-10-02) |
| May 14, 2014 | RDN | A | 7,824 | · | · | 7,824 Direct | · | Acquired | (price as of 2026-10-02) |
| May 14, 2013 | RDN | A | 8,221 | · | · | 8,221 Direct | · | Acquired | (price as of 2026-10-02) |
| May 30, 2012 | RDN | A | 46,371 | · | · | 46,371 Direct | · | Acquired | (price as of 2026-10-02) |
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 15, 2026 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 4,837 | Disposed |
| May 21, 2025 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 4,837 | Acquired |
| May 15, 2025 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 5,109 | Disposed |
| May 22, 2024 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 5,109 | Acquired |
| May 15, 2024 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 5,899 | Disposed |
| May 17, 2023 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 5,899 | Acquired |
| May 15, 2023 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 7,083 | Disposed |
| May 15, 2022 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 5,986 | Disposed |
| May 11, 2022 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 7,083 | Acquired |
| May 13, 2021 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 9,962 | Disposed |
| May 12, 2021 | RDN | Restricted Stock Units - Time-based Award | Common Stock | · | · | 5,986 | Acquired |
| May 13, 2020 | RDN | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 9,962 | Acquired |
| May 15, 2019 | RDN | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 5,768 | Acquired |
| May 9, 2018 | RDN | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 7,833 | Acquired |
| May 10, 2017 | RDN | Restricted Stock Units (stock settled) [F1] | Common Stock | $0.00 | · | 6,924 | Acquired |
| May 11, 2016 | RDN | Restricted Stock Units (stock settled) [F1] | Common Stock | $0.00 | · | 9,458 | Acquired |
| May 13, 2015 | RDN | Restricted Stock Units (stock settled) [F1] | Common Stock | $0.00 | · | 6,333 | Acquired |
| May 14, 2014 | RDN | Restricted Stock Units (stock settled) [F1] | Common Stock | $0.00 | · | 7,824 | Acquired |
| May 14, 2013 | RDN | Restricted Stock Units (stock settled) [F1] | Common Stock | $0.00 | · | 8,221 | Acquired |
| May 30, 2012 | RDN | Restricted Stock Units [F1] | Common Stock | $0.00 | · | 46,371 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 1 holding
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| June 1, 2012 | RDN | Restricted Stock Unit [F1] | · | Direct |