Who owns TDK Corporation?
Prices and market caps: Cboe delayed data, at least 15 minutes delayed. Not real-time. Fundamentals from company filings.
Institutional ownership of TTDKY from SEC Form 13F filings across 9 reporting managers. All positions are from one synchronized reporting period — 2026-06-30 books, filed up to 45 days after quarter end — so every row is comparable.
As of the 2026-06-30 reporting period, 9 institutions disclosed 291,629 shares of TDK Corporation worth $6.5M — about 0% of shares outstanding; the largest disclosed holder is Boston Common Asset Management, LLC. Source: SEC Form 13F filings, parsed by EvidInvest.
9
13F holders
$6.5M
value, 2026 filers
0%
of shares outstanding (291,629 sh)
2
new positions (2026 filers)
Top institutional holders
ordered by shares owned · positions as of 2026-06-30 · % of fund = share of the manager's own book · % of co. = share of TTDKY's shares outstanding
| # | Manager | Shares | Value | % of fund | % of co. | Δ shares QoQ |
|---|---|---|---|---|---|---|
| 1 | Boston Common Asset Management, LLC | 207,984 | $4.7M | 0.3% | 0% | +2.8% |
| 2 | RHUMBLINE ADVISERS | 56,045 | $1.3M | 0.0% | 0% | +5.4% |
| 3 | GAMMA Investing LLC | 13,629 | $304,744 | 0.0% | 0% | +15.4% |
| 4 | Henry James International Management Inc.NEW | 11,019 | $242,043 | 0.1% | 0% | new |
| 5 | Salomon & Ludwin, LLC | 1,911 | $42,931 | 0.0% | 0% | -16.3% |
| 6 | PNC Financial Services Group, Inc. | 380 | $8,497 | 0.0% | 0% | +5.0% |
| 7 | THURSTON, SPRINGER, MILLER, HERD & TITAK, INC. | 377 | $8,429 | 0.0% | 0% | 0.0% |
| 8 | Gleason Group, Inc.NEW | 239 | $5,250 | 0.0% | 0% | new |
| 9 | RICHARDSON FINANCIAL SERVICES INC. | 45 | $1,006 | 0.0% | 0% | 0.0% |
Source: SEC Form 13F-HR filings (institutional managers over $100M in US-listed positions). 13Fs disclose long positions only, up to 45 days after quarter end; each manager's latest filed quarter is shown per row and dollar values are the manager's filed marks. Aggregates labeled "2026 filers" count only managers whose latest book is a 2026 quarter. Related: valuation · options positioning · supply chain. Research, not investment advice.