Managers / Q1 2019 · view latest →
OAK MANAGEMENT CORP
CIK 0001030818 · 195 DANBURY ROAD, BUILDING A, SUITE 220, WILTON, CT, 06897 · 2032268346
Summary
Oak Management Corp reported $258M in U.S.-listed holdings across 4 positions for Q1 2019.
The portfolio is heavily concentrated: KTOS alone accounts for 78.2% of reported value.
Compared with Q4 2018, the fund opened 1 new position and exited 2.
Portfolio Metrics
Methodology: turnover is min(value bought, value sold) ÷ average reported value across the two quarters — value-based, so market moves inflate it slightly versus a share-based measure. Concentration and largest position are shares of the filing’s total reported value, options excluded, with multiple share classes and repeated sub-manager rows for the same issuer combined into one position — the same rule the holdings table uses by default. New/exited counts compare against the prior filed quarter. All figures derive solely from the fund’s 13F filings.
Reported Value by Quarter
Portfolio Composition
- Common Stock · 100.0% · $258M
Quarter-over-Quarter Changes full breakdown →
vs Q4 2018 (amended baseline)
| Issuer | Move | Share Δ | Shares now | Value Δ | Value now |
|---|---|---|---|---|---|
| RBBNRIBBON COMMUNICATIONS INC | NEW | +533.2K | 533.2K | +$3M | $3M |
| LASRNLIGHT INC | SOLD OUT | −4.44M | 0 | −$79M | $0 |
| NEOPHOTONICS CORP | SOLD OUT | −5.57M | 0 | −$36M | $0 |
| CASTLIGHT HEALTH INC | TRIMMED | −1.29M | 4.67M | +$5M | $18M |
| KTOSKRATOS DEFENSE & SEC SOLUTIO | HELD | +0 | 12.93M | +$20M | $202M |
| LEAFLEAF GROUP LTD | HELD | +0 | 4.49M | +$5M | $36M |
Value changes conflate price moves with buying and selling — share changes are the real signal. Share counts are not split-adjusted.
Holdings — Q1 2019
| # | Issuer | Class | % Portfolio | Value ↓ | Shares |
|---|---|---|---|---|---|
| 1 | KTOSKRATOS DEFENSE & SEC SOLUTIOhistory → | COM NEW | 78.24% | $202M | 12.93M |
| 2 | LEAFLEAF GROUP LTDhistory → | COM | 13.93% | $36M | 4.49M |
| 3 | CASTLIGHT HEALTH INC | CL B | 6.77% | $18M | 4.67M |
| 4 | RBBNRIBBON COMMUNICATIONS INChistory → | COM | 1.06% | $3M | 533.2K |
Filing History
| Quarter | Reported Value | Positions | Filed | Type | Links |
|---|---|---|---|---|---|
| Q4 2024 | $0 | 1 | Feb 14, 2025 | 13F-HR | changes · EDGAR ↗ |
| Q3 2024 | $0 | 1 | Nov 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q2 2024 | $0 | 1 | Aug 14, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q1 2024 | $3M | 1 | May 15, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q4 2023 | $3M | 1 | Feb 5, 2024 | 13F-HR | changes · EDGAR ↗ |
| Q3 2023 | $4M | 1 | Nov 7, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q2 2023 | $5M | 1 | Aug 8, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q1 2023 | $20M | 1 | May 8, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q4 2022 | $136M | 2 | Feb 6, 2023 | 13F-HR | changes · EDGAR ↗ |
| Q3 2022 | $159M | 3 | Nov 7, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q2 2022 | $146M | 4 | Aug 8, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q1 2022 | $212M | 4 | May 9, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q4 2021 | $287M | 4 | Feb 7, 2022 | 13F-HR | changes · EDGAR ↗ |
| Q3 2021 | $310M | 2 | Nov 8, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q2 2021 | $194M | 1 | Aug 9, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q1 2021 | $253M | 2 | May 10, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q4 2020 | $274M | 2 | Feb 12, 2021 | 13F-HR | changes · EDGAR ↗ |
| Q3 2020 | $189M | 3 | Nov 16, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q2 2020 | Under review | 3 | Aug 14, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q1 2020 | $6M | 3 | May 15, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q4 2019 | $22M | 3 | Jan 23, 2020 | 13F-HR | changes · EDGAR ↗ |
| Q3 2019 | $36M | 4 | Nov 14, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q2 2019 | $347M | 4 | Aug 14, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q1 2019 | $258M | 4 | May 15, 2019 | 13F-HR | changes · EDGAR ↗ |
| Q4 2018 | $341M | 5 | Feb 12, 2019 | 13F-HR | changes · EDGAR ↗ |
13F filings are due up to 45 days after quarter end, so holdings shown here lag the fund’s current book. Source: original SEC filing on EDGAR ↗.