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Mark S. Blumenkranz

CIK 1614869 · last filed 2024-06-12

Mark S. Blumenkranz is a corporate insider who has filed 32 SEC Form 4 insider transactions across 5 companies since 2014. The most recent filing, for KALA, was dated Jun 12, 2024. Across all open-market trades the lifetime net is −$10.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $369.2K 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

$369.2K

Companies

5

Total Filings

32

Lifetime Open-Market Net

-$10.42M

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
KALA Director 3,631 $0.66 $2.4K $0 5 2024-06-12
IVERIC bio, Inc. (ISEE) Delisted Director 32,088 $39.95 $1.28M $0 7 2023-05-19
1Life Healthcare Inc (ONEM) Delisted Director 4,534 $16.47 $74.7K $0 3 2022-06-06
Adverum Biotechnologies, Inc. (AAVL) Delisted Director 541,853 — — -$10.42M 14 2016-02-17
LENS Director 9,270 $39.57 $366.8K $0 1 2015-03-18

Recent Filings

32 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
2024-06-12 KALA Grant (A) +1,400 $0 EDGAR
2023-07-13 — Disp (D) −32,088 $0
2023-06-23 KALA Grant (A) +4,884 $0 EDGAR
2023-06-02 KALA Mixed +69,711 $0 EDGAR
2023-05-19 IVERIC bio, Inc. (ISEE) Delisted Grant (A) — $0 EDGAR
2023-05-15 IVERIC bio, Inc. (ISEE) Delisted Exer (M) +14,588 $0 EDGAR
2023-02-24 — Disp (D) −4,534 -$81.6K
2022-07-19 IVERIC bio, Inc. (ISEE) Delisted Exer (M) +5,000 $0 EDGAR
2022-06-17 KALA Grant (A) — $0 EDGAR
2022-06-06 1Life Healthcare Inc (ONEM) Delisted Mixed +4,534 $0 EDGAR
Showing 1–10 of 32
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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.