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TIMOTHY A SPRINGER

CIK 1055624 · last filed 2026-06-10

TIMOTHY A SPRINGER is a corporate insider who has filed 77 SEC Form 4 insider transactions across 5 companies since 2016. The most recent filing, for TECX, was dated Jun 10, 2026. Across all open-market trades the lifetime net is +$247.0M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $422.2M across reported positions.

"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.

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Disclosed Exposure

$422.20M

Companies

5

Total Filings

77

Lifetime Open-Market Net

$246.95M

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
TECX Director 5,724,306 $32.71 $187.24M $62.37M 7 2026-06-10
RNAC Director 9,302,798 $8.76 $81.49M $16.68M 18 2026-01-06
Morphic Holding, Inc. (MORF) Delisted Director 4,650,925 $56.99 $265.06M $75.55M 15 2024-06-05
Cartesian Therapeutics, Inc. (SELB) Delisted Director 37,162,115 $0.88 $32.75M $91.35M 29 2023-01-04
SRRK Director 2,957,422 $51.89 $153.46M $1000.0K 6 2019-12-12

Recent Filings

77 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-06-10 TECX Grant (A) — $0 EDGAR
2026-01-06 RNAC Grant (A) +2,600 $0 EDGAR
2025-06-11 TECX Grant (A) — $0 EDGAR
2025-04-11 RNAC Buy (P) +149,075 $1.52M EDGAR
2025-04-11 TECX Buy (P) +141,923 $2.30M EDGAR
2025-04-09 TECX Buy (P) +500,000 $8.55M EDGAR
2025-03-20 RNAC Buy (P) +89,863 $1.37M EDGAR
2025-02-07 TECX Buy (P) +789,294 $40.00M EDGAR
2025-01-15 RNAC Buy (P) +20,967 $366.4K EDGAR
2025-01-06 RNAC Grant (A) +2,600 $0 EDGAR
Showing 1–10 of 77
Page 1 of 8
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.