DOSSIER · 13F Holders · Q1 2026Cheap mega-capRe-rated

Alphabet Inc Call Option 1/18

19 institutions still hold Alphabet Inc Call Option 1/18 as of Q1 2026. Tracked across SEC 13F-HR filings, with insider and 13D/G activity surfaced alongside.

CUSIP 02079k907·19 13F holders·last filed Mar 31, 2026

Market cap

—

▼ 9.1%

vs prior quarter

13F value held

$3.9B

51.0% inst. owned

of float

Holders

19

-94 QoQ

filers reporting

Activity

+12 / −91

+764 added · −803 reduced

this quarter

Concentration

45.81%

IMC-Chicago, LLC #1

top holder share

AI Holders Summary · Q1 2026

19 institutions reported Alphabet Inc Call Option 1/18 in Q1 2026. IMC-Chicago, LLC leads at 45.8% of the visible book. -94 net institutions QoQ — distribution reading.

Top holders

Sorted by position value. Source: SEC EDGAR 13F-HR filings.

Hide index funds / market makers / custodians(2 on this page)

#HolderValueShares% port.Quarter

IMC-Chicago, LLC

CIK 0001452861· Market maker

$1.8B6.2M0.64%Q1 2026 02

Optiver Holding B.V.

CIK 0001859606· Market maker

$1.1B3.9M0.39%Q1 2026 03

JPMORGAN CHASE & CO

$467M1.7M0.03%Q1 2026 04

GROUP ONE TRADING LLC

$261M911K0.50%Q1 2026 05

Gladius Capital Management LP

$94M329K4.20%Q1 2026 06

BlackRock, Inc.

$65M227K0.00%Q1 2026 07

Monolith Management Ltd

$41M142K12.27%Q1 2026 08

NATIONAL BANK OF CANADA /FI/

$31M1K0.03%Q1 2026 09

HRT FINANCIAL LP

$27M86K0.08%Q4 2025 10

Kurv Investment Management LLC

$2M3701.08%Q1 2026 11

Altshuler Shaham Ltd

$976,2943K0.02%Q1 2026 12

Magnus Financial Group LLC

$852,3656K0.07%Q1 2026 13

OSAIC HOLDINGS, INC.

$328,425290.00%Q1 2026 14

PRAKASH INVESTMENT ADVISORS LLC

$324,582480.25%Q1 2026 15

CMT Capital Markets Trading GmbH

$296,6471.0M3.10%Q1 2026 16

Capital Markets Trading UK LLP

$109,762382K1.38%Q1 2026 17

Oak Harvest Investment Services

$22,0503500.00%Q1 2026 18

SG Americas Securities, LLC

$11,975158K0.01%Q1 2026 19

CONCOURSE FINANCIAL GROUP SECURITIES, INC.