SPRINGER TIMOTHY A
Director, 10% Owner · Tectonic Therapeutic, Inc.
Every open-market stock purchase SPRINGER TIMOTHY A has reported to the SEC on Form 4 that met our signal bar, parsed straight from the filings. Insiders sell for many reasons, but they buy with their own money for one — this page tracks where those buys landed inside insider clusters and how the prices paid compare to where the stock trades now.
Where the buys stand today
- TECX+0.30% vs price paidTectonic Therapeutic, Inc.
13 purchases totalling $62.2M at an average of $35.12 per share; the stock last traded at $35.22. See all insider buying in TECX →
Avg price paid$35.12Latest price$35.22Market cap$664.6M - RNAC−38.6% vs price paidCartesian Therapeutics, Inc.
26 purchases totalling $15.4M at an average of $16.85 per share; the stock last traded at $10.34. See all insider buying in RNAC →
Avg price paid$16.85Latest price$10.34Market cap$303.8M
Cluster participation
Buys that landed within days of other insiders buying the same stock — the pattern this site exists to catch.
All reported buys
| Date | Ticker | Shares | Price | Value | Filing |
|---|---|---|---|---|---|
| Apr 11, 2025 | 9,478 | $16.31 | $154.6K | SEC ↗ | |
| Apr 11, 2025 | RNACcluster | 36,338 | $10.77 | $391.4K | SEC ↗ |
| Apr 11, 2025 | 53,706 | $16.31 | $875.9K | SEC ↗ | |
| Apr 10, 2025 | 8,092 | $16.73 | $135.4K | SEC ↗ | |
| Apr 10, 2025 | 45,858 | $16.73 | $767.2K | SEC ↗ | |
| Apr 10, 2025 | RNACcluster | 45,144 | $10.43 | $470.9K | SEC ↗ |
| Apr 9, 2025 | RNACcluster | 41,604 | $9.43 | $392.3K | SEC ↗ |
| Apr 9, 2025 | 16,215 | $14.62 | $237.1K | SEC ↗ | |
| Apr 7, 2025 | 87,500 | $17.10 | $1.5M | SEC ↗ | |
| Apr 7, 2025 | 412,500 | $17.10 | $7.1M | SEC ↗ | |
| Mar 20, 2025 | RNACcluster | 54,889 | $15.59 | $855.7K | SEC ↗ |
| Mar 19, 2025 | RNACcluster | 20,234 | $14.97 | $302.9K | SEC ↗ |
| Mar 18, 2025 | RNACcluster | 14,740 | $14.42 | $212.6K | SEC ↗ |
| Feb 5, 2025 | TECXcluster | 660,000 | $50.00 | $33.0M | SEC ↗ |
| Feb 5, 2025 | TECXcluster | 129,294 | $54.14 | $7.0M | SEC ↗ |
| Jan 13, 2025 | RNACcluster | 8,983 | $17.78 | $159.7K | SEC ↗ |
| Jan 13, 2025 | RNACcluster | 7,962 | $16.86 | $134.2K | SEC ↗ |
| Dec 20, 2024 | RNACcluster | 21,800 | $18.94 | $412.9K | SEC ↗ |
| Dec 19, 2024 | RNACcluster | 11,303 | $17.39 | $196.6K | SEC ↗ |
| Dec 19, 2024 | RNACcluster | 10,529 | $18.35 | $193.2K | SEC ↗ |
| Nov 18, 2024 | RNACcluster | 20,181 | $18.42 | $371.7K | SEC ↗ |
| Nov 18, 2024 | RNACcluster | 38,114 | $17.96 | $684.5K | SEC ↗ |
| Nov 15, 2024 | RNACcluster | 277,246 | $17.09 | $4.7M | SEC ↗ |
| Nov 14, 2024 | RNACcluster | 74,157 | $16.19 | $1.2M | SEC ↗ |
| Nov 14, 2024 | RNACcluster | 22,242 | $16.97 | $377.4K | SEC ↗ |
| Oct 22, 2024 | 300,000 | $33.59 | $10.1M | SEC ↗ | |
| Oct 4, 2024 | RNACcluster | 48,880 | $22.35 | $1.1M | SEC ↗ |
| Oct 4, 2024 | RNACcluster | 16,650 | $23.57 | $392.4K | SEC ↗ |
| Oct 4, 2024 | RNACcluster | 9,892 | $21.35 | $211.2K | SEC ↗ |
| Oct 4, 2024 | RNACcluster | 4,879 | $23.93 | $116.8K | SEC ↗ |
| Oct 3, 2024 | RNACcluster | 8,043 | $21.86 | $175.8K | SEC ↗ |
| Oct 3, 2024 | RNACcluster | 50,489 | $20.18 | $1.0M | SEC ↗ |
| Oct 3, 2024 | RNACcluster | 29,847 | $18.25 | $544.7K | SEC ↗ |
| Oct 3, 2024 | RNACcluster | 21,278 | $21.17 | $450.5K | SEC ↗ |
| Oct 3, 2024 | RNACcluster | 10,249 | $19.01 | $194.8K | SEC ↗ |
| Sep 26, 2024 | 18,999 | $29.13 | $553.4K | SEC ↗ | |
| Sep 26, 2024 | 4,070 | $30.10 | $122.5K | SEC ↗ | |
| Sep 26, 2024 | 24,531 | $28.16 | $690.8K | SEC ↗ | |
| Aug 12, 2024 | RNACcluster | 8,016 | $12.72 | $102.0K | SEC ↗ |
Get alerted the next time SPRINGER TIMOTHY A — or any insider — buys
We watch every Form 4 as it hits SEC EDGAR and alert you when insiders cluster into the same stock.
About this data
Figures are parsed from SPRINGER TIMOTHY A's Form 4 filings on SEC EDGAR (CIK 1055624) and cover open-market purchases (transaction code P) — grants, option exercises, and sales are excluded, which is why totals here can differ from raw filing counts. Every row links to its source document.
This page is informational and reflects public filing data. It is not investment advice.