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Niall O'Donnell

CIK 1780235 · last filed 2023-06-08

Niall O'Donnell is a corporate insider who has filed 16 SEC Form 4 insider transactions across 3 companies since 2019. The most recent filing, for MIRM, was dated Sep 6, 2023. Across all open-market trades the lifetime net is +$8.3M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $190.7M 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

$190.74M

Companies

3

Total Filings

16

Lifetime Open-Market Net

$8.29M

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
OnKure Therapeutics, Inc. (RPHM) Delisted Director 218,871 $18.20 $3.98M $4.00M 5 2023-06-08
SPRB Director 17,684 $54.00 $954.9K $5.75M 5 2023-05-26
MIRM Director 1,621,118 $117.07 $189.78M -$1.46M 5 2022-11-15

Recent Filings

16 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
2023-09-06 MIRM Notice (144) −51,000 -$1.43M EDGAR
2023-06-08 OnKure Therapeutics, Inc. (RPHM) Delisted Grant (A) — $0 EDGAR
2023-05-26 SPRB Grant (A) — $0 EDGAR
2023-05-16 SPRB Buy (P) +630,400 $2.00M EDGAR
2023-05-10 OnKure Therapeutics, Inc. (RPHM) Delisted Buy (P) +125,000 $1.00M EDGAR
2022-11-15 MIRM Sell (S) −300,000 -$5.96M EDGAR
2022-06-06 MIRM Grant (A) — $0 EDGAR
2022-06-03 OnKure Therapeutics, Inc. (RPHM) Delisted Grant (A) — $0 EDGAR
2022-05-27 SPRB Grant (A) — $0 EDGAR
2021-06-08 MIRM Grant (A) — $0 EDGAR
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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.