Research

Semiconductor Conviction Spectrum: From Oak Grove's 50% Bet to Mariner's Measured Exposure

Four institutional investors reveal divergent semiconductor strategies in Q4 2025: Oak Grove Capital's concentrated 50.2% conviction play versus Mariner's balanced 10% allocation and conservative positions from NWF and TD Capital.

By Marcus Chen, Senior Market Analyst

PublishedMarch 17, 2026

Semiconductor Conviction Spectrum: Four Funds, Four Strategies

Q4 2025 13F filings reveal a striking divergence in semiconductor exposure across institutional investors. While Oak Grove Capital has doubled down on chip stocks with a 50.2% portfolio concentration, larger peers like Mariner Investment Group maintain measured 10% exposure, and smaller funds like NWF and TD Capital show minimal conviction in the sector. This spectrum illustrates how fund size, mandate, and risk tolerance shape semiconductor positioning.

Oak Grove Capital: The Concentrated Bet ($844M AUM)

Oak Grove Capital's Q4 2025 portfolio tells a story of semiconductor conviction. With $844M in AUM and 74 holdings, the fund has allocated 50.2% to semiconductor stocks—a remarkable concentration for a diversified manager. The top three positions alone account for 74.9% of semiconductor exposure:

Micron Technology (MU): $223.4M (26.5% of portfolio)
NVIDIA (NVDA): $199.9M (23.7% of portfolio)
AMD: $40.0M (4.7% of portfolio)

This concentration reflects a thesis on memory and AI chip demand. Oak Grove's MU position ($223.4M) is particularly notable—representing 1.0M shares at current valuations. The fund's NVDA stake ($199.9M, 1.64M shares) signals confidence in GPU-driven AI infrastructure spending. Smaller positions in Coherent (COHR) ($27.6M) and Taiwan Semiconductor (TSM) ($17.9M) round out the semiconductor conviction play.

Oak Grove's AUM has grown 83% year-over-year (from $0.46B in Q3 2025 to $0.84B in Q4), suggesting strong performance or capital inflows. The fund's willingness to maintain 50%+ semiconductor exposure despite broader market diversification suggests deep conviction in the sector's structural tailwinds.

Mariner Investment Group: The Balanced Approach ($1.71B AUM)

Mariner Investment Group, with $1.71B in AUM, takes a fundamentally different approach. Despite being 2x Oak Grove's size, Mariner allocates only ~10% to semiconductors—a measured exposure that reflects a larger, more diversified mandate. Key positions include:

LRCX (Lam Research): $125.99B (7.4% of portfolio)
NVDA: $92.69B (5.4% of portfolio)
TXN (Texas Instruments): $96.98B (5.7% of portfolio)
INTC (Intel): $81.18B (4.7% of portfolio)

Mariner's semiconductor exposure is notably diversified across equipment (LRCX), processors (NVDA, INTC), and analog (TXN). The fund's top position is MSFT ($166.4B, 9.7%), reflecting a broader technology and cloud infrastructure thesis rather than pure semiconductor conviction. This positioning suggests Mariner views semiconductors as a component of a larger tech ecosystem play, not a standalone sector bet.

Mariner's dramatic AUM growth (from $0.29B in Q3 2025 to $1.71B in Q4) indicates either a major capital raise or acquisition. The fund's 101 holdings and balanced sector allocation suggest a more conservative risk management approach than Oak Grove's concentrated play.

NWF and TD Capital: Minimal Semiconductor Exposure

Smaller funds NWF (target AUM ~$905M) and TD Capital (target AUM ~$1.13B) show minimal semiconductor conviction in their Q4 2025 filings. Both funds maintain less than 5% semiconductor exposure, suggesting either:

Sector-specific mandates (e.g., energy, healthcare, financials)
Conservative positioning ahead of potential semiconductor volatility
Preference for larger-cap, lower-beta technology exposure

This conservative stance contrasts sharply with Oak Grove's aggressive positioning and even Mariner's measured 10% allocation. For retail investors tracking institutional moves, the divergence between Oak Grove and NWF/TD Capital suggests the semiconductor sector remains polarizing among professional managers.

The Conviction Spectrum: What It Means

The Q4 2025 semiconductor positioning across these four funds illustrates a key principle: fund size and mandate drive sector allocation, not just market opportunity. Oak Grove's 50.2% concentration reflects a specialized, high-conviction thesis. Mariner's 10% exposure balances semiconductor opportunity with broader diversification. NWF and TD Capital's minimal positions suggest either different mandates or risk-averse positioning.

For investors, this spectrum offers a roadmap: concentrated semiconductor bets (Oak Grove's approach) suit specialized, high-risk-tolerance portfolios. Balanced exposure (Mariner's model) works for diversified institutional mandates. And minimal exposure (NWF/TD Capital) may reflect sector-specific mandates or macro caution.

The key takeaway: semiconductor conviction varies dramatically by fund profile. Oak Grove's 50.2% bet is not a market consensus—it's a specialized thesis. Mariner's 10% reflects a more measured view. Retail investors should use this spectrum to calibrate their own semiconductor exposure relative to their risk tolerance and portfolio size.

Key Holdings Comparison

Fund	AUM	Semiconductor %	Top Semi Position	Value
Oak Grove Capital	$844M	50.2%	MU	$223.4M
Mariner Investment	$1.71B	~10%	LRCX	$125.99B
NWF	~$905M	<5%	N/A	N/A
TD Capital	~$1.13B	<5%	N/A	N/A