Grigorios Siokas
Insider
Activist
First SEC filing: Dec. 24, 2015 · Latest: June 12, 2026
Insider at
Insider transactions
20 buys (P)
0 sells (S)
Net: $1,705,267
Avg return of open purchases vs now: -3.3%
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 |
|---|---|---|---|---|---|---|---|---|---|
| July 30, 2026 | COSM | P | 349,825 | $0.20 | $69,965 | 14,597,917 Direct | +2.46% | Acquired | 90.0% (price as of 2026-10-02) |
| July 29, 2026 | COSM | P | 766,284 | $0.18 | $137,931 | 14,248,092 Direct | +5.68% | Acquired | 111.1% (price as of 2026-10-02) |
| June 11, 2026 | COSM | P | 218,447 | $0.21 | $45,874 | 13,481,808 Direct | +1.65% | Acquired | 81.0% (price as of 2026-10-02) |
| June 10, 2026 | COSM | P | 701,447 | $0.23 | $161,333 | 13,263,361 Direct | +5.58% | Acquired | 65.2% (price as of 2026-10-02) |
| May 19, 2026 | COSM | A | 2,350,000 | $0.28 | $658,000 | 12,561,914 Direct | +23.01% | Acquired | 35.7% (price as of 2026-10-02) |
| May 19, 2026 | COSM | C | 2,350,000 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Feb. 12, 2026 | COSM | P | 388,532 | $0.37 | $143,757 | 8,861,914 Direct | +4.59% | Acquired | 2.7% (price as of 2026-10-02) |
| Feb. 11, 2026 | COSM | P | 291,262 | $0.41 | $119,417 | 8,473,382 Direct | +3.56% | Acquired | -7.3% (price as of 2026-10-02) |
| Jan. 23, 2026 | COSM | P | 90,325 | $0.50 | $45,162 | 8,182,120 Direct | +1.12% | Acquired | -24.0% (price as of 2026-10-02) |
| Jan. 20, 2026 | COSM | P | 353,321 | $0.50 | $176,660 | 8,091,795 Direct | +4.57% | Acquired | -24.0% (price as of 2026-10-02) |
| Jan. 14, 2026 | COSM | P | 493,495 | $0.45 | $222,073 | 7,738,474 Direct | +6.81% | Acquired | -15.6% (price as of 2026-10-02) |
| Jan. 12, 2026 | COSM | P | 113,185 | $0.50 | $56,592 | 7,244,979 Direct | +1.59% | Acquired | -24.0% (price as of 2026-10-02) |
| Jan. 8, 2026 | COSM | P | 156,190 | $0.52 | $81,219 | 7,131,794 Direct | +2.24% | Acquired | -26.9% (price as of 2026-10-02) |
| Jan. 7, 2026 | COSM | P | 124,880 | $0.52 | $64,938 | 6,975,604 Direct | +1.82% | Acquired | -26.9% (price as of 2026-10-02) |
| Jan. 6, 2026 | COSM | P | 133,953 | $0.54 | $72,335 | 6,850,724 Direct | +1.99% | Acquired | -29.6% (price as of 2026-10-02) |
| Dec. 19, 2025 | COSM | P | 88,314 | $0.49 | $43,274 | 6,716,771 Direct | +1.33% | Acquired | -22.4% (price as of 2026-10-02) |
| Dec. 15, 2025 | COSM | P | 168,472 | $0.42 | $70,758 | 6,628,457 Direct | +2.61% | Acquired | -9.5% (price as of 2026-10-02) |
| Nov. 28, 2025 | COSM | P | 76,360 | $0.64 | $48,870 | 6,459,985 Direct | +1.20% | Acquired | -40.6% (price as of 2026-10-02) |
| Nov. 25, 2025 | COSM | P | 55,732 | $0.63 | $35,111 | 6,383,625 Direct | +0.88% | Acquired | -39.7% (price as of 2026-10-02) |
| Nov. 21, 2025 | COSM | P | 56,080 | $0.68 | $38,134 | 6,327,893 Direct | +0.89% | Acquired | -44.1% (price as of 2026-10-02) |
| Nov. 20, 2025 | COSM | P | 51,315 | $0.62 | $31,815 | 6,271,813 Direct | +0.82% | Acquired | -38.7% (price as of 2026-10-02) |
| Nov. 19, 2025 | COSM | P | 61,614 | $0.65 | $40,049 | 6,220,498 Direct | +1.00% | Acquired | -41.5% (price as of 2026-10-02) |
| May 23, 2025 | COSM | P | 34,004 | $0.45 | $15,302 | 6,158,884 Direct | +0.56% | Acquired | -15.6% (price as of 2026-10-02) |
| May 22, 2025 | COSM | P | 141,825 | $0.44 | $62,403 | 6,124,880 Direct | +2.37% | Acquired | -13.6% (price as of 2026-10-02) |
| May 21, 2025 | COSM | P | 174,172 | $0.47 | $81,861 | 5,983,055 Direct | +3.00% | Acquired | -19.1% (price as of 2026-10-02) |
| May 20, 2025 | COSM | P | 147,563 | $0.45 | $66,403 | 5,808,883 Direct | +2.61% | Acquired | -15.6% (price as of 2026-10-02) |
| May 19, 2025 | COSM | P | 79,254 | $0.43 | $34,079 | 5,661,320 Direct | +1.42% | Acquired | -11.6% (price as of 2026-10-02) |
| April 24, 2025 | COSM | P | 254,618 | $0.40 | $101,847 | 5,582,066 Direct | +4.78% | Acquired | -5.0% (price as of 2026-10-02) |
| April 24, 2025 | COSM | P | 177,234 | $0.40 | $70,894 | 5,327,448 Direct | +3.44% | Acquired | -5.0% (price as of 2026-10-02) |
| April 23, 2025 | COSM | P | 205,000 | $0.40 | $82,000 | 5,150,214 Direct | +4.15% | Acquired | -5.0% (price as of 2026-10-02) |
| April 22, 2025 | COSM | P | 175,000 | $0.36 | $63,000 | 4,945,214 Direct | +3.67% | Acquired | 5.6% (price as of 2026-10-02) |
| April 21, 2025 | COSM | P | 654,912 | $0.32 | $209,572 | 4,770,214 Direct | +15.91% | Acquired | 18.8% (price as of 2026-10-02) |
| March 4, 2025 | COSM | P | 85,714 | $0.52 | $44,571 | 4,115,302 Direct | +2.13% | Acquired | -26.9% (price as of 2026-10-02) |
| March 3, 2025 | COSM | P | 132,572 | $0.49 | $64,960 | 4,029,588 Direct | +3.40% | Acquired | -22.4% (price as of 2026-10-02) |
| Feb. 24, 2025 | COSM | P | 354,296 | $0.56 | $198,406 | 3,897,016 Direct | +10.00% | Acquired | -32.1% (price as of 2026-10-02) |
| Jan. 30, 2025 | COSM | P | 51,414 | $0.66 | $33,933 | 4,255,103 Direct | +1.22% | Acquired | -42.4% (price as of 2026-10-02) |
| Jan. 22, 2025 | COSM | P | 38,900 | $0.77 | $29,953 | 4,203,689 Direct | +0.93% | Acquired | -50.6% (price as of 2026-10-02) |
| Jan. 17, 2025 | COSM | P | 29,158 | $0.86 | $25,076 | 4,164,789 Direct | +0.71% | Acquired | -55.8% (price as of 2026-10-02) |
| Jan. 16, 2025 | COSM | P | 47,904 | $0.84 | $40,239 | 4,135,631 Direct | +1.17% | Acquired | -54.8% (price as of 2026-10-02) |
| Jan. 15, 2025 | COSM | P | 62,500 | $0.80 | $50,000 | 4,087,727 Direct | +1.55% | Acquired | -52.5% (price as of 2026-10-02) |
| Jan. 14, 2025 | COSM | P | 87,247 | $0.69 | $60,200 | 4,025,227 Direct | +2.22% | Acquired | -44.9% (price as of 2026-10-02) |
| Jan. 13, 2025 | COSM | P | 163,666 | $0.61 | $99,836 | 3,937,980 Direct | +4.34% | Acquired | -37.7% (price as of 2026-10-02) |
| Dec. 20, 2024 | COSM | P | 257,334 | $0.58 | $149,254 | 3,774,314 Direct | +7.32% | Acquired | -34.5% (price as of 2026-10-02) |
| Feb. 16, 2024 | COSM | P | 60,000 | $0.83 | $49,800 | 1,394,597 Direct | +4.50% | Acquired | -54.2% (price as of 2026-10-02) |
| Oct. 12, 2023 | COSM | P | 6,712 | $23.66 | $158,806 | 1,334,597 Direct | +0.51% | Acquired | -98.4% (price as of 2026-10-02) |
| July 20, 2023 | COSM | P | 181,451 | $2.48 | $449,998 | 1,327,885 Direct | +15.83% | Acquired | -84.7% (price as of 2026-10-02) |
| June 6, 2023 | COSM | P | 4,474 | $23.92 | $107,018 | 1,146,434 Direct | +0.39% | Acquired | -98.4% (price as of 2026-10-02) |
| April 27, 2023 | COSM | P | 4,474 | $24.64 | $110,239 | 1,141,960 Direct | +0.39% | Acquired | -98.5% (price as of 2026-10-02) |
| April 21, 2023 | COSM | P | 4,474 | $24.49 | $109,568 | 1,137,486 Direct | +0.39% | Acquired | -98.4% (price as of 2026-10-02) |
| April 7, 2023 | COSM | P | 2,238 | $24.37 | $54,540 | 1,133,012 Direct | +0.20% | Acquired | -98.4% (price as of 2026-10-02) |
| Dec. 19, 2022 | COSM | P | 260,870 | $11.50 | $3,000,005 | 1,130,774 Direct | +29.99% | Acquired | -96.7% (price as of 2026-10-02) |
| Dec. 19, 2022 | COSM | P | 260,870 | $11.50 | $3,000,005 | 1,130,774 Direct | +29.99% | Acquired | -96.7% (price as of 2026-10-02) |
| Dec. 19, 2022 | COSM | P | 260,870 | $11.50 | $3,000,005 | 260,870 Direct | · | Acquired | -96.7% (price as of 2026-10-02) |
| Dec. 2, 2022 | COSM | C | 1,131,098 | $0.62 | $701,281 | 21,747,605 Direct | +5.49% | Acquired | -38.7% (price as of 2026-10-02) |
| Dec. 2, 2022 | COSM | C | 703 | $0.62 | $436 | 0 Direct | -100.00% | Disposed | -38.7% (price as of 2026-10-02) |
| Nov. 30, 2022 | COSM | C | 481,079 | $0.62 | $298,269 | 20,616,507 Direct | +2.39% | Acquired | -38.7% (price as of 2026-10-02) |
| Nov. 30, 2022 | COSM | C | 299 | $0.62 | $185 | 703 Direct | -29.84% | Disposed | -38.7% (price as of 2026-10-02) |
| Nov. 28, 2022 | COSM | P | 801,261 | $0.62 | $496,782 | 20,135,429 Direct | +4.14% | Acquired | -38.7% (price as of 2026-10-02) |
| Nov. 28, 2022 | COSM | C | 498 | $0.62 | $309 | 1,002 Direct | -33.20% | Disposed | -38.7% (price as of 2026-10-02) |
| Nov. 28, 2022 | COSM | P | 801,261 | $0.62 | $496,782 | 20,135,429 Direct | +4.14% | Acquired | -38.7% (price as of 2026-10-02) |
| Nov. 28, 2022 | COSM | S | 498 | $0.62 | $309 | 1,002 Direct | -33.20% | Disposed | -38.7% (price as of 2026-10-02) |
| Oct. 20, 2022 | COSM | P | 12,500,000 | $0.12 | $1,500,000 | 19,334,168 Direct | +182.90% | Acquired | 216.7% (price as of 2026-10-02) |
| Oct. 20, 2022 | COSM | H | 2,654,782 | $0.62 | $1,645,965 | 0 Direct | -100.00% | Disposed | -38.7% (price as of 2026-10-02) |
| Oct. 20, 2022 | COSM | P | 5,309,564 | $0.12 | $637,148 | 5,309,564 Direct | · | Acquired | 216.7% (price as of 2026-10-02) |
| Oct. 20, 2022 | COSM | P | 12,500,000 | $0.12 | $1,500,000 | 12,500,000 Direct | · | Acquired | 216.7% (price as of 2026-10-02) |
| Oct. 20, 2022 | COSM | P | 12,500,000 | $0.12 | $1,500,000 | 12,500,000 Direct | · | Acquired | 216.7% (price as of 2026-10-02) |
| June 15, 2022 | COSM | P | 1,500 | $0.62 | $930 | 2,413,438 Direct | +0.06% | Acquired | -38.7% (price as of 2026-10-02) |
| June 15, 2022 | COSM | P | 500,000 | $0.62 | $310,000 | 5,068,220 Direct | +10.95% | Acquired | -38.7% (price as of 2026-10-02) |
| June 15, 2022 | COSM | P | 500,000 | $0.62 | $310,000 | 4,826,876 Direct | +11.56% | Acquired | -38.7% (price as of 2026-10-02) |
| June 15, 2022 | COSM | P | 1,500 | $0.62 | $930 | 2,413,438 Direct | +0.06% | Acquired | -38.7% (price as of 2026-10-02) |
| Dec. 8, 2021 | COSM | P | 125,000 | $6.00 | $750,000 | 6,834,167 Direct | +1.86% | Acquired | -93.7% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 220,000 | $0.12 | $26,400 | 6,831,067 Direct | -3.12% | Disposed | 216.7% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 2,200 | $0.16 | $352 | 6,828,867 Direct | -0.03% | Disposed | 137.5% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 30,000 | $0.19 | $5,700 | 6,798,867 Direct | -0.44% | Disposed | 100.0% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 4,500 | $0.26 | $1,170 | 6,794,367 Direct | -0.07% | Disposed | 46.2% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 8,150 | $0.29 | $2,364 | 6,786,217 Direct | -0.12% | Disposed | 31.0% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 2,750 | $0.42 | $1,155 | 6,783,467 Direct | -0.04% | Disposed | -9.5% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 15,300 | $0.76 | $11,628 | 6,768,167 Direct | -0.23% | Disposed | -50.0% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 30,500 | $3.82 | $116,510 | 6,737,667 Direct | -0.45% | Disposed | -90.1% (price as of 2026-10-02) |
| Oct. 22, 2021 | COSM | S | 28,500 | $4.08 | $116,280 | 6,709,167 Direct | -0.42% | Disposed | -90.7% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 100,000 | · | · | 7,224,517 Direct | -1.37% | Disposed | (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 4,250 | $0.28 | $1,190 | 7,220,267 Direct | -0.06% | Disposed | 35.7% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 3,000 | $0.39 | $1,170 | 7,217,267 Direct | -0.04% | Disposed | -2.6% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 2,500 | $0.47 | $1,175 | 7,214,767 Direct | -0.03% | Disposed | -19.1% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 93,300 | $3.79 | $353,607 | 7,121,467 Direct | -1.29% | Disposed | -90.0% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 23,300 | $3.80 | $88,540 | 7,098,167 Direct | -0.33% | Disposed | -90.0% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 12,300 | $3.85 | $47,355 | 7,085,867 Direct | -0.17% | Disposed | -90.1% (price as of 2026-10-02) |
| July 20, 2021 | COSM | S | 34,800 | $4.07 | $141,636 | 7,051,067 Direct | -0.49% | Disposed | -90.7% (price as of 2026-10-02) |
| July 19, 2021 | COSM | P | 208,333 | $6.00 | $1,249,998 | 7,324,517 Direct | +2.93% | Acquired | -93.7% (price as of 2026-10-02) |
| July 13, 2021 | COSM | P | 166,667 | $6.00 | $1,000,002 | 7,116,184 Direct | +2.40% | Acquired | -93.7% (price as of 2026-10-02) |
| June 23, 2021 | COSM | P | 500,000 | $6.00 | $3,000,000 | 6,949,517 Direct | +7.75% | Acquired | -93.7% (price as of 2026-10-02) |
| June 17, 2021 | COSM | S | 392,000 | $0.31 | $121,520 | 6,619,517 Direct | -5.59% | Disposed | 22.6% (price as of 2026-10-02) |
| June 17, 2021 | COSM | S | 50,000 | $0.36 | $18,000 | 6,569,517 Direct | -0.76% | Disposed | 5.6% (price as of 2026-10-02) |
| June 17, 2021 | COSM | S | 20,000 | $0.60 | $12,000 | 6,549,517 Direct | -0.30% | Disposed | -36.7% (price as of 2026-10-02) |
| June 17, 2021 | COSM | S | 100,000 | $0.85 | $85,000 | 6,449,517 Direct | -1.53% | Disposed | -55.3% (price as of 2026-10-02) |
| April 27, 2021 | COSM | S | 50,000 | · | · | 7,559,049 Direct | -0.66% | Disposed | (price as of 2026-10-02) |
| April 27, 2021 | COSM | S | 23,382 | $0.01 | $234 | 7,535,667 Direct | -0.31% | Disposed | 3700.0% (price as of 2026-10-02) |
| April 27, 2021 | COSM | S | 150,000 | $0.01 | $1,500 | 7,385,667 Direct | -1.99% | Disposed | 3700.0% (price as of 2026-10-02) |
| April 27, 2021 | COSM | S | 5,000 | $0.10 | $500 | 7,380,667 Direct | -0.07% | Disposed | 280.0% (price as of 2026-10-02) |
| April 27, 2021 | COSM | S | 133,500 | $0.12 | $16,020 | 7,247,167 Direct | -1.81% | Disposed | 216.7% (price as of 2026-10-02) |
Showing latest 100 of 240 transactions
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 19, 2026 | COSM | Restricted Stock Unit | Common Stock, par value $.001 | · | May 19, 2036 | 2,350,000 | Disposed |
| Dec. 19, 2022 | COSM | Warrants | Common Stock | $11.50 | Dec. 21, 2027 | 260,870 | Acquired |
| Dec. 2, 2022 | COSM | Series A Preferred Stock | Common Stock | $0.62 | · | 703 | Disposed |
| Nov. 30, 2022 | COSM | Series A Preferred Stock | Common Stock | $0.62 | · | 299 | Disposed |
| Nov. 28, 2022 | COSM | Series A Preferred Stock | Common Stock | $0.62 | · | 498 | Disposed |
| Nov. 28, 2022 | COSM | Series A Preferred Stock | Common Stock | $0.62 | · | 498 | Disposed |
| Oct. 20, 2022 | COSM | Common Warrants | Common Stock | $0.62 | Aug. 28, 2027 | 2,654,782 | Disposed |
| Oct. 20, 2022 | COSM | Exchange Warrants | Common Stock | $0.12 | Oct. 20, 2029 | 5,309,564 | Acquired |
| Oct. 20, 2022 | COSM | Series A Common Warrants | Common Stock | $0.12 | Oct. 20, 2024 | 12,500,000 | Acquired |
| Oct. 20, 2022 | COSM | Series B Common Warrants | Common Stock | $0.12 | Oct. 20, 2029 | 12,500,000 | Acquired |
| June 15, 2022 | COSM | Series A Preferred | Common Stock | $0.62 | · | 1,500 | Acquired |
| June 15, 2022 | COSM | Warrants | Common Stock | $0.62 | Aug. 27, 2027 | 500,000 | Acquired |
| June 15, 2022 | COSM | Warrants | Common Stock | $0.62 | Aug. 27, 2027 | 500,000 | Acquired |
| June 15, 2022 | COSM | Series A Preferred | Common Stock | $0.62 | · | 1,500 | 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 |
|---|---|---|---|---|
| Dec. 24, 2015 | COSM | Common Stock, par value $0.001 per share | 95,000,000 | Direct |