Timothy A. Springer
Insider
Activist
First SEC filing: April 7, 2025 · Latest: June 10, 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 |
|---|---|---|---|---|---|---|---|---|---|
| June 9, 2026 | TECX | A | 10,200 | · | · | 10,200 Direct | · | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2026 | RNAC | A | 2,600 | · | · | 8,646,285 Direct | +0.03% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2026 | RNAC | A | 7,800 | · | · | 7,800 Direct | · | Acquired | (price as of 2026-10-02) |
| June 9, 2025 | TECX | A | 10,200 | · | · | 10,200 Direct | · | Acquired | (price as of 2026-10-02) |
| April 11, 2025 | TECX | P | 9,478 | $16.31 | $154,586 | 4,334,846 Direct | +0.22% | Acquired | 38.2% (price as of 2026-10-02) |
| April 11, 2025 | TECX | P | 53,706 | $16.31 | $875,945 | 1,503,358 Indirect | +3.70% | Acquired | 38.2% (price as of 2026-10-02) |
| April 11, 2025 | RNAC | P | 6,412 | $10.77 | $69,057 | 8,643,685 Direct | +0.07% | Acquired | -31.7% (price as of 2026-10-02) |
| April 11, 2025 | RNAC | P | 36,338 | $10.77 | $391,360 | 656,513 Indirect | +5.86% | Acquired | -31.7% (price as of 2026-10-02) |
| April 10, 2025 | TECX | P | 8,092 | $16.73 | $135,379 | 4,325,368 Direct | +0.19% | Acquired | 34.7% (price as of 2026-10-02) |
| April 10, 2025 | TECX | P | 45,858 | $16.73 | $767,204 | 1,449,652 Indirect | +3.27% | Acquired | 34.7% (price as of 2026-10-02) |
| April 10, 2025 | RNAC | P | 7,966 | $10.43 | $83,085 | 8,636,664 Direct | +0.09% | Acquired | -29.4% (price as of 2026-10-02) |
| April 10, 2025 | RNAC | P | 609 | $10.92 | $6,650 | 8,637,273 Direct | +0.01% | Acquired | -32.6% (price as of 2026-10-02) |
| April 10, 2025 | RNAC | P | 45,144 | $10.43 | $470,852 | 616,724 Indirect | +7.90% | Acquired | -29.4% (price as of 2026-10-02) |
| April 10, 2025 | RNAC | P | 3,451 | $10.92 | $37,685 | 620,175 Indirect | +0.56% | Acquired | -32.6% (price as of 2026-10-02) |
| April 9, 2025 | TECX | P | 2,861 | $14.62 | $41,828 | 4,316,419 Direct | +0.07% | Acquired | 54.2% (price as of 2026-10-02) |
| April 9, 2025 | TECX | P | 857 | $15.23 | $13,052 | 4,317,276 Direct | +0.02% | Acquired | 48.0% (price as of 2026-10-02) |
| April 9, 2025 | TECX | P | 16,215 | $14.62 | $237,063 | 1,398,938 Indirect | +1.17% | Acquired | 54.2% (price as of 2026-10-02) |
| April 9, 2025 | TECX | P | 4,856 | $15.23 | $73,957 | 1,403,794 Indirect | +0.35% | Acquired | 48.0% (price as of 2026-10-02) |
| April 9, 2025 | RNAC | P | 7,342 | $9.43 | $69,235 | 8,628,667 Direct | +0.09% | Acquired | -22.0% (price as of 2026-10-02) |
| April 9, 2025 | RNAC | P | 31 | $9.95 | $308 | 8,628,698 Direct | 0.00% | Acquired | -26.0% (price as of 2026-10-02) |
| April 9, 2025 | RNAC | P | 41,604 | $9.43 | $392,326 | 571,402 Indirect | +7.85% | Acquired | -22.0% (price as of 2026-10-02) |
| April 9, 2025 | RNAC | P | 178 | $9.95 | $1,771 | 571,580 Indirect | +0.03% | Acquired | -26.0% (price as of 2026-10-02) |
| April 7, 2025 | TECX | P | 87,500 | $17.10 | $1,496,250 | 4,313,558 Direct | +2.07% | Acquired | 31.8% (price as of 2026-10-02) |
| April 7, 2025 | TECX | P | 412,500 | $17.10 | $7,053,750 | 1,382,723 Indirect | +42.52% | Acquired | 31.8% (price as of 2026-10-02) |
| March 20, 2025 | RNAC | P | 54,889 | $15.59 | $855,720 | 8,621,325 Direct | +0.64% | Acquired | -52.8% (price as of 2026-10-02) |
| March 19, 2025 | RNAC | P | 20,234 | $14.97 | $302,903 | 8,566,436 Direct | +0.24% | Acquired | -50.8% (price as of 2026-10-02) |
| March 18, 2025 | RNAC | P | 14,740 | $14.42 | $212,551 | 8,546,202 Direct | +0.17% | Acquired | -49.0% (price as of 2026-10-02) |
| Feb. 5, 2025 | TECX | P | 129,294 | $54.14 | $6,999,977 | 4,226,058 Direct | +3.16% | Acquired | -58.4% (price as of 2026-10-02) |
| Feb. 5, 2025 | TECX | P | 660,000 | $50.00 | $33,000,000 | 970,223 Indirect | +212.75% | Acquired | -54.9% (price as of 2026-10-02) |
| Jan. 14, 2025 | RNAC | P | 4,022 | $18.00 | $72,396 | 8,531,462 Direct | +0.05% | Acquired | -59.1% (price as of 2026-10-02) |
| Jan. 13, 2025 | RNAC | P | 7,962 | $16.86 | $134,239 | 8,518,457 Direct | +0.09% | Acquired | -56.3% (price as of 2026-10-02) |
| Jan. 13, 2025 | RNAC | P | 8,983 | $17.78 | $159,718 | 8,527,440 Direct | +0.11% | Acquired | -58.6% (price as of 2026-10-02) |
| Jan. 2, 2025 | RNAC | A | 2,600 | · | · | 8,510,495 Direct | +0.03% | Acquired | (price as of 2026-10-02) |
| Jan. 2, 2025 | RNAC | A | 7,800 | · | · | 7,800 Direct | · | Acquired | (price as of 2026-10-02) |
| Dec. 23, 2024 | RNAC | P | 5,181 | $19.00 | $98,439 | 8,507,895 Direct | +0.06% | Acquired | -61.3% (price as of 2026-10-02) |
| Dec. 20, 2024 | RNAC | P | 21,800 | $18.94 | $412,892 | 8,502,714 Direct | +0.26% | Acquired | -61.1% (price as of 2026-10-02) |
| Dec. 19, 2024 | RNAC | P | 11,303 | $17.39 | $196,559 | 8,467,009 Direct | +0.13% | Acquired | -57.7% (price as of 2026-10-02) |
| Dec. 19, 2024 | RNAC | P | 10,529 | $18.35 | $193,207 | 8,477,538 Direct | +0.12% | Acquired | -59.9% (price as of 2026-10-02) |
| Dec. 19, 2024 | RNAC | P | 3,376 | $18.93 | $63,908 | 8,480,914 Direct | +0.04% | Acquired | -61.1% (price as of 2026-10-02) |
| Nov. 18, 2024 | RNAC | P | 38,114 | $17.96 | $684,527 | 8,435,525 Direct | +0.45% | Acquired | -59.0% (price as of 2026-10-02) |
| Nov. 18, 2024 | RNAC | P | 20,181 | $18.42 | $371,734 | 8,455,706 Direct | +0.24% | Acquired | -60.0% (price as of 2026-10-02) |
| Nov. 15, 2024 | RNAC | P | 277,246 | $17.09 | $4,738,134 | 8,397,411 Direct | +3.41% | Acquired | -56.9% (price as of 2026-10-02) |
| Nov. 14, 2024 | RNAC | P | 74,157 | $16.19 | $1,200,602 | 8,097,923 Direct | +0.92% | Acquired | -54.5% (price as of 2026-10-02) |
| Nov. 14, 2024 | RNAC | P | 22,242 | $16.97 | $377,447 | 8,120,165 Direct | +0.27% | Acquired | -56.6% (price as of 2026-10-02) |
| Oct. 22, 2024 | TECX | P | 300,000 | $33.59 | $10,077,000 | 4,096,764 Direct | +7.90% | Acquired | -32.9% (price as of 2026-10-02) |
| Oct. 4, 2024 | RNAC | P | 9,892 | $21.35 | $211,194 | 7,953,357 Direct | +0.12% | Acquired | -65.5% (price as of 2026-10-02) |
| Oct. 4, 2024 | RNAC | P | 48,880 | $22.35 | $1,092,468 | 8,002,237 Direct | +0.61% | Acquired | -67.1% (price as of 2026-10-02) |
| Oct. 4, 2024 | RNAC | P | 16,650 | $23.57 | $392,440 | 8,018,887 Direct | +0.21% | Acquired | -68.8% (price as of 2026-10-02) |
| Oct. 4, 2024 | RNAC | P | 4,879 | $23.93 | $116,754 | 8,023,766 Direct | +0.06% | Acquired | -69.2% (price as of 2026-10-02) |
| Oct. 3, 2024 | RNAC | P | 29,847 | $18.25 | $544,708 | 7,853,406 Direct | +0.38% | Acquired | -59.7% (price as of 2026-10-02) |
| Oct. 3, 2024 | RNAC | P | 10,249 | $19.01 | $194,833 | 7,863,655 Direct | +0.13% | Acquired | -61.3% (price as of 2026-10-02) |
| Oct. 3, 2024 | RNAC | P | 50,489 | $20.18 | $1,018,868 | 7,914,144 Direct | +0.64% | Acquired | -63.5% (price as of 2026-10-02) |
| Oct. 3, 2024 | RNAC | P | 21,278 | $21.17 | $450,455 | 7,935,422 Direct | +0.27% | Acquired | -65.2% (price as of 2026-10-02) |
| Oct. 3, 2024 | RNAC | P | 8,043 | $21.86 | $175,820 | 7,943,465 Direct | +0.10% | Acquired | -66.3% (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | J | 1,801,314 | · | · | 7,818,045 Direct | +29.94% | Acquired | (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | P | 5,514 | $17.38 | $95,833 | 7,823,559 Direct | +0.07% | Acquired | -57.7% (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | J | 2,119,193 | · | · | 529,798 Indirect | -80.00% | Disposed | (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | J | 317,879 | · | · | 330,695 Indirect | +2480.33% | Acquired | (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | J | 133,632 | · | · | 33,408 Indirect | -80.00% | Disposed | (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | J | 113,587 | · | · | 113,587 Direct | · | Acquired | (price as of 2026-10-02) |
| Oct. 2, 2024 | RNAC | J | 20,045 | · | · | 20,045 Indirect | · | Acquired | (price as of 2026-10-02) |
| Sept. 26, 2024 | TECX | P | 24,531 | $28.16 | $690,793 | 3,771,295 Direct | +0.65% | Acquired | -20.0% (price as of 2026-10-02) |
| Sept. 26, 2024 | TECX | P | 18,999 | $29.13 | $553,441 | 3,790,294 Direct | +0.50% | Acquired | -22.6% (price as of 2026-10-02) |
| Sept. 26, 2024 | TECX | P | 4,070 | $30.10 | $122,507 | 3,794,364 Direct | +0.11% | Acquired | -25.1% (price as of 2026-10-02) |
| Sept. 26, 2024 | TECX | P | 2,400 | $30.87 | $74,088 | 3,796,764 Direct | +0.06% | Acquired | -27.0% (price as of 2026-10-02) |
| Sept. 25, 2024 | RNAC | M | 1,636,832 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 25, 2024 | RNAC | M | 1,636,832 | · | · | 6,016,731 Direct | +37.37% | Acquired | (price as of 2026-10-02) |
| Sept. 25, 2024 | RNAC | M | 721,361 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 25, 2024 | RNAC | M | 721,361 | · | · | 2,648,991 Indirect | +37.42% | Acquired | (price as of 2026-10-02) |
| Sept. 25, 2024 | RNAC | M | 1,307 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| Sept. 25, 2024 | RNAC | M | 1,307 | · | · | 12,816 Indirect | +11.36% | Acquired | (price as of 2026-10-02) |
| Sept. 24, 2024 | TECX | J | 1,240,893 | · | · | 310,223 Indirect | -80.00% | Disposed | (price as of 2026-10-02) |
| Sept. 24, 2024 | TECX | J | 1,054,759 | · | · | 3,746,764 Direct | +39.18% | Acquired | (price as of 2026-10-02) |
| Sept. 24, 2024 | TECX | J | 186,134 | · | · | 186,134 Indirect | · | Acquired | (price as of 2026-10-02) |
| Aug. 12, 2024 | RNAC | P | 8,016 | $12.72 | $101,964 | 11,509 Indirect | +229.49% | Acquired | -42.1% (price as of 2026-10-02) |
| July 2, 2024 | RNAC | A | 1,636,832 | $20.00 | $32,736,640 | 1,636,832 Direct | · | Acquired | -63.2% (price as of 2026-10-02) |
| July 2, 2024 | RNAC | A | 721,361 | $20.00 | $14,427,220 | 721,361 Indirect | · | Acquired | -63.2% (price as of 2026-10-02) |
| July 2, 2024 | RNAC | A | 1,307 | $20.00 | $26,140 | 1,307 Indirect | · | Acquired | -63.2% (price as of 2026-10-02) |
| June 20, 2024 | TECX | A | 2,692,005 | · | · | 2,692,005 Direct | · | Acquired | (price as of 2026-10-02) |
| June 20, 2024 | TECX | A | 1,551,116 | · | · | 1,551,116 Indirect | · | Acquired | (price as of 2026-10-02) |
| June 20, 2024 | TECX | A | 11,760 | · | · | 11,760 Direct | · | Acquired | (price as of 2026-10-02) |
| April 8, 2024 | RNAC | M | 123,925 | · | · | 0 Direct | -100.00% | Disposed | (price as of 2026-10-02) |
| April 8, 2024 | RNAC | M | 4,130,846 | · | · | 4,379,899 Direct | +1658.62% | Acquired | (price as of 2026-10-02) |
| April 8, 2024 | RNAC | M | 24,785 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| April 8, 2024 | RNAC | M | 826,169 | · | · | 1,927,630 Indirect | +75.01% | Acquired | (price as of 2026-10-02) |
| March 26, 2024 | RNAC | M | 1,970,443 | $1.46 | $2,876,847 | 33,043,849 Indirect | +6.34% | Acquired | -83.2% (price as of 2026-10-02) |
| March 26, 2024 | RNAC | M | 1,970,443 | · | · | 0 Indirect | -100.00% | Disposed | (price as of 2026-10-02) |
| March 18, 2024 | RNAC | P | 800 | $0.61 | $488 | 104,818 Indirect | +0.77% | Acquired | -59.8% (price as of 2026-10-02) |
| March 18, 2024 | RNAC | P | 19,044 | $0.60 | $11,426 | 31,073,406 Indirect | +0.06% | Acquired | -59.1% (price as of 2026-10-02) |
| March 15, 2024 | RNAC | P | 1,200 | $0.56 | $672 | 104,018 Indirect | +1.17% | Acquired | -56.2% (price as of 2026-10-02) |
| March 15, 2024 | RNAC | P | 537,500 | $0.59 | $317,125 | 31,054,362 Indirect | +1.76% | Acquired | -58.4% (price as of 2026-10-02) |
| March 14, 2024 | RNAC | P | 2,000 | $0.53 | $1,060 | 102,818 Indirect | +1.98% | Acquired | -53.7% (price as of 2026-10-02) |
| March 14, 2024 | RNAC | P | 648,372 | $0.54 | $350,121 | 30,516,862 Indirect | +2.17% | Acquired | -54.6% (price as of 2026-10-02) |
| March 13, 2024 | RNAC | P | 3,200 | $0.58 | $1,856 | 100,818 Indirect | +3.28% | Acquired | -57.7% (price as of 2026-10-02) |
| March 12, 2024 | RNAC | P | 1,200 | $0.61 | $732 | 97,618 Indirect | +1.24% | Acquired | -59.8% (price as of 2026-10-02) |
| March 11, 2024 | RNAC | P | 1,200 | $0.65 | $780 | 96,418 Indirect | +1.26% | Acquired | -62.3% (price as of 2026-10-02) |
| March 8, 2024 | RNAC | P | 4,800 | $0.66 | $3,168 | 95,218 Indirect | +5.31% | Acquired | -62.8% (price as of 2026-10-02) |
| Feb. 7, 2024 | RNAC | P | 2,400 | $0.66 | $1,584 | 90,418 Indirect | +2.73% | Acquired | -62.8% (price as of 2026-10-02) |
| Feb. 6, 2024 | RNAC | P | 800 | $0.65 | $520 | 88,018 Indirect | +0.92% | Acquired | -62.3% (price as of 2026-10-02) |
| Jan. 17, 2024 | RNAC | P | 800 | $0.69 | $552 | 87,218 Indirect | +0.93% | Acquired | -64.4% (price as of 2026-10-02) |
Showing latest 100 of 177 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 |
|---|---|---|---|---|---|---|---|
| June 9, 2026 | TECX | Stock Option (Right to Buy) | Common Stock | $28.56 | June 8, 2036 | 10,200 | Acquired |
| Jan. 2, 2026 | RNAC | Stock Option (Right to Buy) | Common Stock | $6.76 | Jan. 1, 2036 | 7,800 | Acquired |
| June 9, 2025 | TECX | Stock Option (Right to Buy) | Common Stock | $24.48 | June 8, 2035 | 10,200 | Acquired |
| Jan. 2, 2025 | RNAC | Stock Option (Right to Buy) | Common Stock | $16.93 | Jan. 1, 2035 | 7,800 | Acquired |
| Oct. 2, 2024 | RNAC | Warrant (Right to Buy) | Common Stock | $46.50 | April 11, 2027 | 133,632 | Disposed |
| Oct. 2, 2024 | RNAC | Warrant (Right to Buy) | Common Stock | $46.50 | April 11, 2027 | 113,587 | Acquired |
| Oct. 2, 2024 | RNAC | Warrant (Right to Buy) | Common Stock | $46.50 | April 11, 2027 | 20,045 | Acquired |
| June 20, 2024 | TECX | Stock Option (Right to Buy) | Common Stock | $16.80 | June 19, 2034 | 11,760 | Acquired |
| March 26, 2024 | RNAC | Warrant (Right to Buy) | Common Stock | $1.46 | Dec. 23, 2024 | 1,970,443 | Disposed |
| Jan. 2, 2024 | RNAC | Stock Option (Right to Buy) | Common Stock | $0.66 | Jan. 1, 2034 | 228,000 | Acquired |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $17.47 | June 15, 2027 | 6,410 | Disposed |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $12.75 | June 14, 2028 | 10,000 | Disposed |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $2.10 | June 13, 2029 | 10,000 | Disposed |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $3.00 | June 18, 2030 | 20,000 | Disposed |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $4.01 | March 29, 2031 | 40,000 | Disposed |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $3.31 | Jan. 2, 2032 | 40,000 | Disposed |
| Nov. 13, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $1.13 | Jan. 1, 2033 | 75,000 | Disposed |
| Jan. 2, 2023 | RNAC | Stock Option (Right to Buy) | Common Stock | $1.13 | Jan. 1, 2033 | 75,000 | Acquired |
| April 11, 2022 | RNAC | Warrant (right to buy) | Common Stock | $1.55 | April 11, 2027 | 5,011,200 | Acquired |
| Jan. 3, 2022 | RNAC | Stock Option (Right to Buy) | Common Stock | $3.31 | Jan. 2, 2032 | 40,000 | Acquired |
| March 30, 2021 | RNAC | Stock Option (Right to Buy) | Common Stock | $4.01 | March 29, 2031 | 40,000 | Acquired |
| June 19, 2020 | RNAC | Stock Option (Right to Buy) | Common Stock | $3.00 | June 18, 2030 | 20,000 | Acquired |
| Dec. 23, 2019 | RNAC | Warrants | Common Stock | $1.46 | Dec. 23, 2024 | 1,970,443 | Acquired |
| June 14, 2019 | RNAC | Stock Option (Right to Buy) | Common Stock | $2.10 | June 13, 2029 | 10,000 | Acquired |
| June 22, 2018 | SRRK | Stock Option (right to buy) | Common Stock | $21.62 | June 22, 2028 | 20,316 | Acquired |
| June 15, 2018 | RNAC | Stock Option (Right to Buy) | Common Stock | $12.75 | June 14, 2028 | 10,000 | Acquired |
| May 29, 2018 | SRRK | Series A-4 Preferred | Common Stock | · | · | 787,649 | Disposed |
| May 29, 2018 | SRRK | Series C Preferred | Common Stock | · | · | 855,391 | Disposed |
| May 29, 2018 | SRRK | Series B Preferred | Common Stock | · | · | 2,094,875 | Disposed |
| May 29, 2018 | SRRK | Series A-3 Preferred | Common Stock | · | · | 1,449,275 | Disposed |
| May 29, 2018 | SRRK | Series A-2 Preferred | Common Stock | · | · | 1,491,792 | Disposed |
| May 29, 2018 | SRRK | Series A-1 Preferred | Common Stock | · | · | 1,000,000 | Disposed |
| June 27, 2017 | RNAC | Warrant (right to buy) | Common Stock | $17.71 | June 27, 2022 | 79,130 | Acquired |
| June 16, 2017 | RNAC | Stock Option (Right to Buy) | Common Stock | $17.47 | June 15, 2027 | 6,410 | Acquired |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 7 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| May 23, 2018 | SRRK | Common Stock | 788,146 | Direct |
| May 23, 2018 | SRRK | Series A-1 Preferred Stock | 350,287 | Direct |
| May 23, 2018 | SRRK | Series A-2 Preferred Stock | 522,556 | Direct |
| May 23, 2018 | SRRK | Series A-3 Preferred Stock | 507,662 | Direct |
| May 23, 2018 | SRRK | Series B Preferred Stock | 733,808 | Direct |
| May 23, 2018 | SRRK | Series C Preferred Stock | 299,632 | Direct |
| May 23, 2018 | SRRK | Series A-4 Preferred Stock | 275,903 | Indirect |