Birnam Oak Advisors, LP
SEC Form 13F institutional filer · CIK 0001997245
13F-HR · 16 reported holdings · 2026-03-31
Reported long-US-equity value
$0.14B
Top-10 concentration
97.4%
Birnam Oak Advisors, LP — $140M AUM allocation strategy
Birnam Oak Advisors, LP files SEC Form 13F and reports $140M of long US equity value across 16 reported holdings for 2026-03-31.
Its largest sector bet is Communication Services 36.2%, followed by Industrials 31.0% and Consumer Staples 17.3%.
The top 10 holdings account for 97% of reported value — a conviction-weighted book concentrated in its best ideas. The sector and industry splits below are of the same reported value. Track quarter-over-quarter adds, trims, new positions and exits below — sourced from SEC 13F filings, public domain.
Birnam Oak Advisors, LP — latest SEC 13F insights
Reported long-US-equity value (13F AUM)
$140M
total across 16 reported holdings · 2026-03-31 · excludes shorts, cash, non-US
Top-10 concentration
97% of value
higher = narrower conviction; lower = spread / hedging
Biggest trims (shares)
−$COF −16K sh · −$4.11M−$SPGI −5K sh · −$1.06M−$AMZN −3K sh · −$907K
Sector allocation (share of reported value)
each slice is a share of the reported long-US-equity value — smaller sectors and the rest of the book roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Industry allocation (share of reported value)
- Rail Transportation31.0%—
- Broadcasting24.0%—
- Personal Care Products17.3%—
- Wireless Telecommunication Services12.2%—
- Multi-Sector Holdings4.8%—
- Broadline Retail1.4%—
- Investment Banking & Brokerage1.1%—
- Systems Software0.8%—
- Other holdings7.4%—
the finer GICS cut of the same book — same denominator — smaller industries roll into “Other holdings”
Qtr shift = share-point change vs the prior quarter's filing — first period tracked for this filer; the column fills in with the next quarterly refresh.
Top S&P 500 holdings
8 of 8 rows · sorted by Value ↓
| Ticker | Holding | Shares | Value | Δ QoQ | Weight |
|---|---|---|---|---|---|
| $NSC | Norfolk Southern Corporation | 152K | $43.6M | +29.3K | 31.0% |
| $WBD | Warner Bros. Discovery Inc. Series A | 1.23M | $33.7M | — | 24.0% |
| $KVUE | Kenvue Inc | 1.41M | $24.3M | — | 17.3% |
| $ECHO | EchoStar Corporation | 146K | $17.1M | +8K | 12.2% |
| $BRK.B | Berkshire Hathaway Inc.-Class B | 14K | $6.71M | -2K | 4.8% |
| $AMZN | Amazon.com Inc | 9.5K | $1.98M | -3K | 1.4% |
| $MSFT | Microsoft Corporation | 3K | $1.11M | -3K | 0.8% |
| $SPGI | S&P Global Inc | 5K | $1.06M | -5K | 0.8% |
…and 8 more holdings in the full 13F filing (top positions only shown).
SEC Form 13F data sets · public domain · 45-day filing lag · >$100M AUM managers · as reported
← All 13F filers·← QuantOrb.pro
How to read Δ QoQ — the five insight categories, and the caveats
The categories. Analysts, quants and retail traders look past total portfolio value to isolate actionable signals. Five categories matter.
Conviction & concentration shifts
New positions vs complete exits — a brand-new stock signals high conviction; a full liquidation suggests a broken thesis or tax-loss harvesting. Aggressive sizing — look at share count, not dollars: a 20% share increase during a drawdown is strong dip-buying. Concentration — a narrowing top-5/10 means conviction; spreading capital across more names means hedging.
Sector & macro allocation rotations
Aggregating Δ QoQ moves across sectors shows where smart money is leaning in or sneaking out — rotating out of growth into defensives or energy, for example. The fund's total long equity exposure quarter-over-quarter is a proxy for overall institutional risk appetite.
Crowding & smart-money consensus
When several managers initiate or expand the same stock in the same quarter, that is institutional consensus. Contrarian reads: top pickers buying hard into a beaten-down name the market is selling.
Derivative & option overlays
Reported call/put changes indicate whether managers are adding downside hedges or leveraging upside exposure. Note: a long increase may be half of a market-neutral pair trade.
Who reads this
| Retail "cloners" | High-conviction ideas to replicate ~45 days after quarter-end. |
| Corporate IR | Which funds bought or dumped the stock, before the next call. |
| Quant / algo traders | Cross-sectional factor inputs: flow, momentum, ownership. |
Four caveats before you trade on it
- 45-day lag — holdings are quarter-end; positions may already be closed.
- Long-only — 13Fs miss shorts, pair trades and cash.
- No non-US / fixed income — the picture is US equities plus options.
- Corporate actions — splits and spinoffs distort raw share deltas.
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