David Mandelbaum
Insider
First SEC filing: Jan. 21, 2022 · Latest: Jan. 21, 2022
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 21, 2026 | ALX | A | 505 | · | · | 505 Direct | · | Acquired | (price as of 2026-10-02) |
| May 21, 2026 | VNO | A | 7,168 | · | · | 7,168 Direct | · | Acquired | (price as of 2026-10-02) |
| May 22, 2025 | ALX | A | 346 | · | · | 346 Direct | · | Acquired | (price as of 2026-10-02) |
| May 22, 2025 | VNO | A | 6,062 | · | · | 6,062 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2024 | VNO | A | 7,400 | · | · | 7,400 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2024 | ALX | A | 357 | · | · | 357 Direct | · | Acquired | (price as of 2026-10-02) |
| May 18, 2023 | VNO | A | 13,436 | · | · | 13,436 Direct | · | Acquired | (price as of 2026-10-02) |
| May 18, 2023 | ALX | A | 449 | · | · | 449 Direct | · | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | ALX | A | 326 | · | · | 326 Direct | · | Acquired | (price as of 2026-10-02) |
| May 19, 2022 | VNO | A | 5,167 | · | · | 5,167 Direct | · | Acquired | (price as of 2026-10-02) |
| May 20, 2021 | ALX | A | 284 | · | · | 2,278 Direct | +14.24% | Acquired | (price as of 2026-10-02) |
| May 20, 2021 | VNO | A | 3,859 | · | · | 3,859 Direct | · | Acquired | (price as of 2026-10-02) |
| May 14, 2020 | VNO | A | 5,310 | · | · | 5,310 Direct | · | Acquired | (price as of 2026-10-02) |
| May 14, 2020 | ALX | A | 329 | · | · | 1,994 Direct | +19.76% | Acquired | (price as of 2026-10-02) |
| May 16, 2019 | VNO | A | 2,611 | · | · | 2,611 Direct | · | Acquired | (price as of 2026-10-02) |
| May 16, 2019 | ALX | A | 193 | · | · | 1,665 Direct | +13.11% | Acquired | (price as of 2026-10-02) |
| May 17, 2018 | VNO | A | 2,628 | · | · | 2,628 Direct | · | Acquired | (price as of 2026-10-02) |
| May 17, 2018 | ALX | A | 195 | · | · | 1,472 Direct | +15.27% | Acquired | (price as of 2026-10-02) |
| May 18, 2017 | VNO | A | 1,345 | · | · | 1,345 Direct | · | Acquired | (price as of 2026-10-02) |
| May 18, 2017 | ALX | A | 183 | · | · | 1,277 Direct | +16.73% | Acquired | (price as of 2026-10-02) |
| May 19, 2016 | ALX | A | 203 | · | · | 1,094 Direct | +22.78% | Acquired | (price as of 2026-10-02) |
| May 19, 2016 | VNO | A | 1,363 | · | · | 1,363 Direct | · | Acquired | (price as of 2026-10-02) |
| May 21, 2015 | ALX | A | 176 | · | · | 891 Direct | +24.62% | Acquired | (price as of 2026-10-02) |
| May 21, 2015 | VNO | A | 1,220 | · | · | 1,220 Direct | · | Acquired | (price as of 2026-10-02) |
| May 22, 2014 | ALX | A | 212 | · | · | 715 Direct | +42.15% | Acquired | (price as of 2026-10-02) |
| May 22, 2014 | VNO | A | 1,193 | · | · | 1,193 Direct | · | Acquired | (price as of 2026-10-02) |
| Aug. 7, 2013 | VNO | A | 417 | · | · | 417 Direct | · | Acquired | (price as of 2026-10-02) |
| May 23, 2013 | ALX | A | 243 | · | · | 503 Direct | +93.46% | Acquired | (price as of 2026-10-02) |
| May 23, 2013 | VNO | A | 1,068 | · | · | 1,068 Direct | · | Acquired | (price as of 2026-10-02) |
| May 24, 2012 | VNO | A | 1,086 | · | · | 1,086 Direct | · | Acquired | (price as of 2026-10-02) |
| May 24, 2012 | ALX | A | 129 | · | · | 260 Direct | +98.47% | Acquired | (price as of 2026-10-02) |
| May 26, 2011 | ALX | A | 131 | · | · | 131 Direct | · | Acquired | (price as of 2026-10-02) |
| May 26, 2011 | VNO | A | 941 | · | · | 3,252 Direct | +40.72% | Acquired | (price as of 2026-10-02) |
| May 13, 2010 | VNO | A | 608 | · | · | 2,311 Direct | +35.70% | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNO | A | 6 | · | · | 30 Direct | +25.00% | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNO | A | 20,261 | · | · | 5,607,174 Indirect | +0.36% | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNO | A | 2,031 | · | · | 300,599 Indirect | +0.68% | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNO | A | 11,377 | · | · | 2,909,252 Indirect | +0.39% | Acquired | (price as of 2026-10-02) |
| Dec. 14, 2009 | VNO | A | 77 | · | · | 238,957 Direct | +0.03% | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2009 | VNO | A | 8 | · | · | 24 Direct | +50.00% | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2009 | VNO | A | 24,401 | · | · | 5,591,297 Indirect | +0.44% | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2009 | VNO | A | 2,561 | · | · | 517,476 Indirect | +0.50% | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2009 | VNO | A | 14,345 | · | · | 2,897,875 Indirect | +0.50% | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2009 | VNO | A | 97 | · | · | 19,972 Direct | +0.49% | Acquired | (price as of 2026-10-02) |
| June 12, 2009 | VNO | A | 6 | · | · | 16 Direct | +60.00% | Acquired | (price as of 2026-10-02) |
| June 12, 2009 | VNO | A | 60,817 | · | · | 5,577,920 Indirect | +1.10% | Acquired | (price as of 2026-10-02) |
| June 12, 2009 | VNO | A | 6,030 | · | · | 514,915 Indirect | +1.18% | Acquired | (price as of 2026-10-02) |
| June 12, 2009 | VNO | A | 33,771 | · | · | 2,883,530 Indirect | +1.19% | Acquired | (price as of 2026-10-02) |
| June 12, 2009 | VNO | A | 230 | · | · | 19,875 Direct | +1.17% | Acquired | (price as of 2026-10-02) |
| May 14, 2009 | VNO | A | 1,131 | · | · | 1,703 Direct | +197.73% | Acquired | (price as of 2026-10-02) |
| March 12, 2009 | VNO | A | 10 | · | · | 10 Direct | · | Acquired | (price as of 2026-10-02) |
| March 12, 2009 | VNO | A | 124,139 | · | · | 5,567,139 Indirect | +2.28% | Acquired | (price as of 2026-10-02) |
| March 12, 2009 | VNO | A | 8,885 | · | · | 508,885 Indirect | +1.78% | Acquired | (price as of 2026-10-02) |
| March 12, 2009 | VNO | A | 49,759 | · | · | 2,849,759 Indirect | +1.78% | Acquired | (price as of 2026-10-02) |
| March 12, 2009 | VNO | A | 340 | · | · | 19,645 Direct | +1.76% | Acquired | (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | M | 10,000 | $70.38 | $703,800 | 10,000 Direct | · | Acquired | 246.5% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | S | 1,406 | $311.16 | $437,491 | 8,594 Direct | -14.06% | Disposed | -21.6% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | S | 100 | $312.39 | $31,239 | 8,494 Direct | -1.16% | Disposed | -21.9% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | S | 500 | $312.87 | $156,435 | 7,994 Direct | -5.89% | Disposed | -22.1% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | S | 100 | $313.19 | $31,319 | 7,894 Direct | -1.25% | Disposed | -22.1% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | S | 100 | $315.31 | $31,531 | 7,794 Direct | -1.27% | Disposed | -22.7% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | S | 57 | $316.59 | $18,046 | 7,737 Direct | -0.73% | Disposed | -23.0% (price as of 2026-10-02) |
| Nov. 13, 2008 | ALX | M | 10,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| May 17, 2007 | VNO | A | 309 | · | · | 572 Direct | +117.49% | Acquired | (price as of 2026-10-02) |
| May 17, 2007 | VNO | A | 263 | · | · | 263 Direct | · | Acquired | (price as of 2026-10-02) |
| March 17, 2006 | VNO | A | 307 | · | · | 19,305 Direct | +1.62% | Acquired | (price as of 2026-10-02) |
| March 4, 2005 | VNO | J | 2,800,000 | · | · | 2,800,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Dec. 20, 2004 | VNO | J | 0 | · | · | 7,943,000 Indirect | 0.00% | Acquired | (price as of 2026-10-02) |
| Dec. 20, 2004 | VNO | J | 2,800,000 | · | · | 2,800,000 Indirect | -50.00% | Disposed | (price as of 2026-10-02) |
| Sept. 27, 2004 | VNO | J | 1,800,000 | · | · | 2,800,000 Indirect | +180.00% | Acquired | (price as of 2026-10-02) |
| Sept. 27, 2004 | VNO | J | 1,800,000 | · | · | 18,998 Direct | -98.96% | Disposed | (price as of 2026-10-02) |
| Sept. 14, 2004 | VNO | J | 1,000,000 | · | · | 1,000,000 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 14, 2004 | VNO | J | 1,000,000 | · | · | 1,818,998 Direct | -35.47% | Disposed | (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 21, 2026 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 505 | Acquired |
| May 21, 2026 | VNO | Restricted Units [F1] | Common Shares | · | · | 7,168 | Acquired |
| May 22, 2025 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 346 | Acquired |
| May 22, 2025 | VNO | Restricted Units [F1] | Common Shares | · | · | 6,062 | Acquired |
| May 23, 2024 | VNO | Restricted Units [F1] | Common Shares | · | · | 7,400 | Acquired |
| May 23, 2024 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 357 | Acquired |
| May 18, 2023 | VNO | Restricted Units [F1] | Common Shares | · | · | 13,436 | Acquired |
| May 18, 2023 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 449 | Acquired |
| May 19, 2022 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 326 | Acquired |
| May 19, 2022 | VNO | Restricted Units [F1] | Common Shares | · | · | 5,167 | Acquired |
| May 20, 2021 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 284 | Acquired |
| May 20, 2021 | VNO | Restricted Units [F1] | Common Shares | · | · | 3,859 | Acquired |
| May 14, 2020 | VNO | Restricted Units [F1] | Common Shares | · | · | 5,310 | Acquired |
| May 14, 2020 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 329 | Acquired |
| May 16, 2019 | VNO | Restricted Units [F1] | Common Shares | · | · | 2,611 | Acquired |
| May 16, 2019 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 193 | Acquired |
| May 17, 2018 | VNO | Restricted Units [F1] | Common Shares | · | · | 2,628 | Acquired |
| May 17, 2018 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 195 | Acquired |
| May 18, 2017 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,345 | Acquired |
| May 18, 2017 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 183 | Acquired |
| May 19, 2016 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 203 | Acquired |
| May 19, 2016 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,363 | Acquired |
| May 21, 2015 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 176 | Acquired |
| May 21, 2015 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,220 | Acquired |
| May 22, 2014 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 212 | Acquired |
| May 22, 2014 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,193 | Acquired |
| Aug. 7, 2013 | VNO | Restricted Units [F1] | Common Shares | · | · | 417 | Acquired |
| May 23, 2013 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 243 | Acquired |
| May 23, 2013 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,068 | Acquired |
| May 24, 2012 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,086 | Acquired |
| May 24, 2012 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 129 | Acquired |
| May 26, 2011 | ALX | Deferred Stock Units [F1] | Common Stock | · | · | 131 | Acquired |
| May 26, 2011 | VNO | Restricted Units [F1] | Common Shares | · | · | 941 | Acquired |
| May 13, 2010 | VNO | Restricted Units [F1] | Common Shares | · | · | 608 | Acquired |
| Dec. 14, 2009 | VNO | Class A Units | Common Shares | · | · | 6 | Acquired |
| Sept. 14, 2009 | VNO | Class A Units | Common Shares | · | · | 8 | Acquired |
| June 12, 2009 | VNO | Class A Units | Common Shares | · | · | 6 | Acquired |
| May 14, 2009 | VNO | Restricted Units [F1] | Common Shares | · | · | 1,131 | Acquired |
| March 12, 2009 | VNO | Class A Units | Common Shares | · | · | 10 | Acquired |
| Nov. 13, 2008 | ALX | Options (Right to Buy) | Common Stock | $70.38 | March 4, 2009 | 10,000 | Disposed |
| May 17, 2007 | VNO | Restricted Units [F1] | Common Shares | · | · | 309 | Acquired |
| May 17, 2007 | VNO | Restricted Units [F1] | Common Shares | · | · | 263 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).