David B. Singer
Insider
Activist
First SEC filing: May 26, 2026 · Latest: May 29, 2026
Insider at
Insider transactions
0 buys (P)
22 sells (S)
Net: $-258,106,128
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 29, 2026 | INFQ | J | 350,115 | · | · | 350,115 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 29, 2026 | INFQ | J | 660,901 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| May 29, 2026 | INFQ | J | 321,623 | · | · | 405,396 Indirect | +383.92% | Acquired | (price as of 2026-10-02) |
| May 29, 2026 | INFQ | J | 311,208 | · | · | 660,901 Indirect | +88.99% | Acquired | (price as of 2026-10-02) |
| May 29, 2026 | INFQ | S | 12,310 | $17.91 | $220,472 | 0 Indirect | -100.00% | Disposed | -26.6% (price as of 2026-10-02) |
| May 29, 2026 | INFQ | S | 66,194 | $16.85 | $1,115,369 | 12,310 Indirect | -84.32% | Disposed | -22.0% (price as of 2026-10-02) |
| May 29, 2026 | INFQ | S | 1,541,092 | $16.05 | $24,734,527 | 78,504 Indirect | -95.15% | Disposed | -18.1% (price as of 2026-10-02) |
| May 29, 2026 | INFQ | J | 810,384 | · | · | 1,619,596 Indirect | -33.35% | Disposed | (price as of 2026-10-02) |
| May 29, 2026 | INFQ | S | 1,353 | $17.91 | $24,232 | 0 Indirect | -100.00% | Disposed | -26.6% (price as of 2026-10-02) |
| May 29, 2026 | INFQ | S | 7,277 | $16.85 | $122,617 | 1,353 Indirect | -84.32% | Disposed | -22.0% (price as of 2026-10-02) |
| May 29, 2026 | INFQ | S | 169,411 | $16.05 | $2,719,047 | 8,630 Indirect | -95.15% | Disposed | -18.1% (price as of 2026-10-02) |
| May 29, 2026 | INFQ | J | 1,386,029 | · | · | 178,041 Indirect | -88.62% | Disposed | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 83,773 | · | · | 83,773 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 349,693 | · | · | 349,693 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | S | 603,707 | $15.98 | $9,647,238 | 2,429,980 Indirect | -19.90% | Disposed | -17.7% (price as of 2026-10-02) |
| May 27, 2026 | INFQ | S | 1,376,716 | $15.29 | $21,049,988 | 3,033,687 Indirect | -31.22% | Disposed | -14.0% (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 508,549 | · | · | 4,410,403 Indirect | -10.34% | Disposed | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | S | 332,639 | $15.98 | $5,315,571 | 1,564,070 Indirect | -17.54% | Disposed | -17.7% (price as of 2026-10-02) |
| May 27, 2026 | INFQ | S | 758,561 | $15.29 | $11,598,398 | 1,896,709 Indirect | -28.57% | Disposed | -14.0% (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 460,072 | · | · | 2,655,270 Indirect | -14.77% | Disposed | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 83,773 | · | · | 83,773 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 349,693 | · | · | 349,693 Indirect | · | Acquired | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 2,448,979 | · | · | 2,469,973 Indirect | -49.79% | Disposed | (price as of 2026-10-02) |
| May 27, 2026 | INFQ | J | 1,551,021 | · | · | 1,564,321 Indirect | -49.79% | Disposed | (price as of 2026-10-02) |
| May 22, 2026 | INFQ | S | 751,744 | $17.04 | $12,809,718 | 0 Indirect | -100.00% | Disposed | -22.8% (price as of 2026-10-02) |
| May 22, 2026 | INFQ | S | 2,635,848 | $16.70 | $44,018,662 | 4,918,952 Indirect | -34.89% | Disposed | -21.3% (price as of 2026-10-02) |
| May 22, 2026 | INFQ | S | 137,795 | $17.04 | $2,348,027 | 0 Indirect | -100.00% | Disposed | -22.8% (price as of 2026-10-02) |
| May 22, 2026 | INFQ | S | 1,669,369 | $16.70 | $27,878,462 | 3,115,342 Indirect | -34.89% | Disposed | -21.3% (price as of 2026-10-02) |
| May 22, 2026 | INFQ | S | 35,450 | $17.04 | $604,068 | 0 Indirect | -100.00% | Disposed | -22.8% (price as of 2026-10-02) |
| May 22, 2026 | INFQ | S | 19,761 | $17.04 | $336,727 | 0 Indirect | -100.00% | Disposed | -22.8% (price as of 2026-10-02) |
| May 21, 2026 | INFQ | S | 2,128,025 | $14.69 | $31,260,687 | 751,744 Indirect | -73.90% | Disposed | -10.5% (price as of 2026-10-02) |
| May 21, 2026 | INFQ | S | 2,262,112 | $14.69 | $33,230,425 | 7,554,800 Indirect | -23.04% | Disposed | -10.5% (price as of 2026-10-02) |
| May 21, 2026 | INFQ | S | 390,066 | $14.69 | $5,730,070 | 137,795 Indirect | -73.90% | Disposed | -10.5% (price as of 2026-10-02) |
| May 21, 2026 | INFQ | S | 1,432,671 | $14.69 | $21,045,937 | 4,784,711 Indirect | -23.04% | Disposed | -10.5% (price as of 2026-10-02) |
| May 21, 2026 | INFQ | S | 100,350 | $14.69 | $1,474,142 | 35,450 Indirect | -73.90% | Disposed | -10.5% (price as of 2026-10-02) |
| May 21, 2026 | INFQ | S | 55,939 | $14.69 | $821,744 | 19,761 Indirect | -73.90% | Disposed | -10.5% (price as of 2026-10-02) |
| April 10, 2026 | INFQ | A | 33,928 | · | · | 33,928 Direct | · | Acquired | (price as of 2026-10-02) |
| April 10, 2026 | INFQ | A | 33,928 | · | · | 33,928 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 13, 2026 | INFQ | A | 34,740 | · | · | 34,740 Direct | · | Acquired | (price as of 2026-10-02) |
| Feb. 13, 2026 | INFQ | A | 29,950 | · | · | 29,950 Direct | · | Acquired | (price as of 2026-10-02) |
| June 17, 2021 | SEER | A | 15,000 | · | · | 15,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 3,390,559 | · | · | 3,390,559 Indirect | · | Acquired | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 1,934,954 | · | · | 1,934,954 Indirect | · | Acquired | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 1,280,724 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 1,275,928 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 265,434 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 326,269 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 242,204 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 777,593 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 700,762 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 145,780 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 179,192 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 8, 2020 | SEER | C | 131,627 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Dec. 3, 2020 | SEER | A | 37,383 | · | · | 37,383 Direct | · | Acquired | (price as of 2026-10-02) |
| June 13, 2012 | PACB | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| June 23, 2011 | PACB | A | 12,500 | · | · | 12,500 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 26, 2010 | PACB | A | 25,000 | · | · | 25,000 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 31, 2004 | CORT | S | 17,500 | $6.27 | $109,725 | 731,667 Direct | -2.34% | Disposed | 1753.7% (price as of 2026-10-02) |
| Dec. 30, 2004 | CORT | S | 25,649 | $6.48 | $166,206 | 749,167 Direct | -3.31% | Disposed | 1693.7% (price as of 2026-10-02) |
| Dec. 22, 2004 | CORT | G | 3,500 | · | · | 774,816 Direct | -0.45% | Disposed | (price as of 2026-10-02) |
| Dec. 22, 2004 | CORT | G | 3,500 | · | · | 778,316 Direct | -0.45% | Disposed | (price as of 2026-10-02) |
| April 19, 2004 | CORT | C | 12,761 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 19, 2004 | CORT | C | 10,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 19, 2004 | CORT | C | 9,685 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 19, 2004 | CORT | C | 12,761 | · | · | 781,816 Direct | +1.66% | Acquired | (price as of 2026-10-02) |
| April 19, 2004 | CORT | C | 30,000 | · | · | 769,055 Direct | +4.06% | Acquired | (price as of 2026-10-02) |
| April 19, 2004 | CORT | C | 29,055 | · | · | 739,055 Direct | +4.09% | 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 |
|---|---|---|---|---|---|---|---|
| April 10, 2026 | INFQ | Stock Option (Right to Buy) | Common Stock | $12.59 | April 10, 2036 | 33,928 | Acquired |
| April 10, 2026 | INFQ | Stock Option (Right to Buy) | Common Stock | $12.59 | April 10, 2036 | 33,928 | Acquired |
| Feb. 13, 2026 | INFQ | Stock Option (Right to Buy) | Common Stock | $0.90 | June 5, 2034 | 34,740 | Acquired |
| Feb. 13, 2026 | INFQ | Stock Option (Right to Buy) | Common Stock | $13.22 | Feb. 12, 2036 | 29,950 | Acquired |
| June 17, 2021 | SEER | Stock Option (right to buy) | Class A Common Stock | $33.74 | June 17, 2031 | 15,000 | Acquired |
| Dec. 8, 2020 | SEER | Series A Convertible Preferred Stock | Class A Common Stock | · | · | 1,280,724 | Disposed |
| Dec. 8, 2020 | SEER | Series B Convertible Preferred Stock | Class A Common Stock | · | · | 1,275,928 | Disposed |
| Dec. 8, 2020 | SEER | Series C Convertible Preferred Stock | Class A Common Stock | · | · | 265,434 | Disposed |
| Dec. 8, 2020 | SEER | Series D Convertible Preferred Stock | Class A Common Stock | · | · | 326,269 | Disposed |
| Dec. 8, 2020 | SEER | Series D-1 Convertible Preferred Stock | Class A Common Stock | · | · | 242,204 | Disposed |
| Dec. 8, 2020 | SEER | Series A Convertible Preferred Stock | Class A Common Stock | · | · | 777,593 | Disposed |
| Dec. 8, 2020 | SEER | Series B Convertible Preferred Stock | Class A Common Stock | · | · | 700,762 | Disposed |
| Dec. 8, 2020 | SEER | Series C Convertible Preferred Stock | Class A Common Stock | · | · | 145,780 | Disposed |
| Dec. 8, 2020 | SEER | Series D Convertible Preferred Stock | Class A Common Stock | · | · | 179,192 | Disposed |
| Dec. 8, 2020 | SEER | Series D-1 Convertible Preferred Stock | Class A Common Stock | · | · | 131,627 | Disposed |
| Dec. 3, 2020 | SEER | Stock Option (right to buy) | Class A Common Stock | $19.00 | Dec. 3, 2020 | 37,383 | Acquired |
| June 13, 2012 | PACB | Stock Option (right to buy) | Common Stock | $1.83 | June 13, 2022 | 25,000 | Acquired |
| June 23, 2011 | PACB | Stock Option (right to buy) | Common Stock | $10.58 | June 23, 2021 | 12,500 | Acquired |
| Oct. 26, 2010 | PACB | Stock Option (right to buy) | Common Stock | $16.00 | Oct. 26, 2020 | 25,000 | Acquired |
| April 19, 2004 | CORT | Series BB Preferred Stock | Common Stock | · | · | 12,761 | Disposed |
| April 19, 2004 | CORT | Series B Preferred Stock | Common Stock | · | · | 10,000 | Disposed |
| April 19, 2004 | CORT | Series A Preferred Stock | Common Stock | · | · | 9,685 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 23 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Feb. 18, 2026 | INFQ | Common Stock | 75,700 | Indirect |
| Feb. 18, 2026 | INFQ | Common Stock | 135,800 | Indirect |
| Feb. 18, 2026 | INFQ | Common Stock | 6,217,382 | Indirect |
| Feb. 18, 2026 | INFQ | Common Stock | 527,861 | Indirect |
| Feb. 18, 2026 | INFQ | Common Stock | 9,816,912 | Indirect |
| Feb. 18, 2026 | INFQ | Common Stock | 2,879,769 | Indirect |
| Dec. 3, 2020 | SEER | Series A Convertible Preferred Stock | 1,280,724 | Indirect |
| Dec. 3, 2020 | SEER | Series B Convertible Preferred Stock | 1,275,928 | Indirect |
| Dec. 3, 2020 | SEER | Series C Convertible Preferred Stock | 265,434 | Indirect |
| Dec. 3, 2020 | SEER | Series D Convertible Preferred Stock | 326,269 | Indirect |
| Dec. 3, 2020 | SEER | Series D-1 Convertible Preferred Stock | 242,204 | Indirect |
| Dec. 3, 2020 | SEER | Class B Common Stock | 101,761 | Indirect |
| Dec. 3, 2020 | SEER | Series A Convertible Preferred Stock | 777,593 | Indirect |
| Dec. 3, 2020 | SEER | Series B Convertible Preferred Stock | 700,762 | Indirect |
| Dec. 3, 2020 | SEER | Series C Convertible Preferred Stock | 145,780 | Indirect |
| Dec. 3, 2020 | SEER | Series D Convertible Preferred Stock | 179,192 | Indirect |
| Dec. 3, 2020 | SEER | Series D-1 Convertible Preferred Stock | 131,627 | Indirect |
| Dec. 3, 2020 | SEER | Class B Common Stock | 61,789 | Indirect |
| April 14, 2004 | CORT | Common Stock | · | Direct |
| April 14, 2004 | CORT | Common Stock | 40,000 | Indirect |
| April 14, 2004 | CORT | Series A Preferred Stock | 29,055 | Direct |
| April 14, 2004 | CORT | Series B Preferred Stock | 30,000 | Direct |
| April 14, 2004 | CORT | Series BB Preferred Stock | 12,761 | Direct |