Huang Jack Jiajia

Activist filer·CIK 0002029760·13D/G filings since 2025·Active campaigns: 4
Active campaigns
4
Total position
—
Largest position
—
Avg stake size
—
Lifetime campaigns
10
Avg duration
—

Active campaigns

4 campaigns
Opened 30 Jan 2025 · Days active: 496
$CWK

Huang Jack Jiajia filed a Schedule 13D for Cushman & Wakefield plc on 23 October 2025. Schedule 13D indicates active intent.

Read the latest 13D filing on EDGAR →
Opened 30 Jan 2025 · Days active: 496
$MFAO

Huang Jack Jiajia filed a Schedule 13D for MFA FINANCIAL, INC. on 22 July 2025. Schedule 13D indicates active intent.

Read the latest 13D filing on EDGAR →
Opened 30 Jan 2025 · Days active: 496
$KOS

Huang Jack Jiajia filed a Schedule 13D for Kosmos Energy Ltd. on 17 April 2025. Schedule 13D indicates active intent.

Read the latest 13D filing on EDGAR →
Opened 30 Jan 2025 · Days active: 496
$?

Huang Jack Jiajia filed a Schedule 13D for EquityZen Growth Technology Fund LLC - Series 1382 on 30 January 2025. Schedule 13D indicates active intent.

Read the latest 13D filing on EDGAR →

Past campaigns

Closed-campaign history pending
In development

Closed-campaign history ships with campaign tracking.

Once campaign-tracking is online, this section will list every closed 13D / 13G position with its hold duration, peak stake, and outcome. The pipeline requires open-close pairing on amendments — not derivable from individual filings alone.

Convergence · Pattern Engine ships in v1.1

30-day window
In development

Convergence participation lands with the Pattern Engine.

Once the Pattern Engine ships, this section will list every active convergence event Huang is named in — the hedge funds and Congress members on the same name, the 30-day window, and the combined position size.

Context

13D vs 13G

Schedule 13D and 13G filings are required when an investor crosses 5% beneficial ownership of a public company. A 13D indicates active intent — engagement with management, board representation, strategic proposals. A 13G is the passive equivalent, used by long-term holders who do not intend to influence corporate decisions. Conversion from 13G to 13D, or a 13D amendment, is itself a disclosure event and often signals an inflection point in the activist's posture.

Source data: SEC EDGAR · 13D and 13G filings · Last refreshed 12:58 UTC.