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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 $349.6M 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

$349.57M

Companies

5

Total Filings

77

Lifetime Open-Market Net

$246.95M

Filer Profile

Reported Address
36 WOODMAN ROAD
CHESTNUT HILL, MA 02467
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

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 $23.73 $135.84M $62.37M 7 2026-06-10
RNAC Director 9,302,798 $7.44 $69.21M $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 $48.87 $144.51M $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.