Arkolith/Funds/Fort Baker Capital Management LP

Fort Baker Capital Management LP

CIK 1688382
Holdings as of Mar 31, 2026·disclosed May 15, 2026·~45-day 13F lag·13F-HR
Active Filer

Fort Baker Capital Management LP holds a focused book of 115 stocks worth $1.1B as of Q1 2026 (disclosed May 15, 2026, a ~45-day 13F lag). This quarter they opened Aes Corp and trimmed Clearwater Analytics HDS-A. Their largest long position is Warner Bros Discovery Inc at 10% of the equity book. They also disclosed $112.7M in put options (a bearish bet) and $33.7M in call options (bullish), shown separately below and excluded from the equity book.

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holdings, largest changes, and filing provenance.
Opened
58
new positions
Added to
25
existing
Trimmed
13
reduced
Sold out
51
exited

Concentration

Top-heavy: focused book

Top 5 holdings
32%
Top 10 holdings
48%
Top 20 holdings
66%

Share of the disclosed book in its largest positions. A higher top-5 share means a more concentrated, higher-conviction portfolio.

Direct sector allocation

79% mapped to company sectors

Financials
32%
ETF / fund or unclassified
21%
Information Technology
14%
Communication Services
14%
Utilities
8%
Industrials
5%
Health Care
5%
Energy
1%

Direct operating-company sectors from our SIC-based security master. ETF/fund and unclassified holdings stay visible separately; this is not ETF look-through exposure.

Biggest moves: latest quarter

Estimated $ traded · quarter-end prices, no cost basis

Bought
Trimmed / exited

Holdings: largest first

Bars show each stock's share of the portfolio. Click a row for its position history.

115 positions
#SecurityValueShares% PortLast moveHistory
1Warner Bros Discovery Inc
COM SER A
$110.4M4.02M
9.8%
+203%
Added · +2.7M sh
2Electronic Arts Inc
COM
$80.6M395.2K
7.1%
+242%
Added · +279K sh
3Aes Corp
COM
$62.3M4.42M
5.5%
New
New position
4Masimo Corp
COM
$55.6M312.7K
4.9%
New
New position
5Norfolk Southn Corp
COM
$50.1M174.6K
4.4%
New
New position
6Terns Pharmaceuticals Inc
COM
$43.3M822.0K
3.8%
New
New position
7Liberty Broadband Corp
COM SER C
$42.1M837.2K
3.7%
+222%
Added · +577K sh
8Bain Cap GSS Invt Corp
ORD CL A
$40.3M3.98M
3.6%
+43%
Added · +1.2M sh
9Cartesian Growth Corp III
COM CL A
$27.7M2.70M
2.5%
+6.9%
Added · +174K sh
10Churchill Cap Corp XI
CL A ORD SHS
$25.6M2.52M
2.3%
New
New position
11Gores Hldgs X Inc
SHS CL A
$23.7M2.32M
2.1%
+63%
Added · +892K sh
12Clearwater Analytics Hldgs I
CL A
$23.0M970.6K
2.0%
−37%
Reduced · −559K sh
13Marriott Vacations Worldwide
NOTE 3.250%12/1
$21.4M22.00M
1.9%
New
New position
14Agriculture & Nat Sol Acq Co
SHS CL A
$21.2M1.88M
1.9%
Held
15Enovis Corporation
NOTE 3.875%10/1
$20.7M21.00M
1.8%
+20%
Added · +3.5M sh
16Northwestern Energy Group In
COM NEW
$20.6M313.0K
1.8%
New
New position
17Strategy Inc
NOTE 12/0
$19.2M22.90M
1.7%
+358%
Added · +17.9M sh
18Real Asset Acquisition Corp
SHS CL A
$18.1M1.72M
1.6%
New
New position
19Cohen Circle Acquisit Corp I
SHS CL A
$16.9M1.66M
1.5%
+370%
Added · +1.3M sh
20Onestream Inc
CL A
$16.6M689.6K
1.5%
New
New position
21Perimeter Acquisition Corp I
COM CL A
$16.1M1.57M
1.4%
+97%
Added · +774K sh
22Graf Global Corp
ORD SHS CL A
$16.0M1.50M
1.4%
+81%
Added · +670K sh
23Roman DBDR Acquisition Corp
ORD SHS CL A
$16.0M1.52M
1.4%
Held
24Churchill Capital Corp IX
CL A SHS
$15.5M1.46M
1.4%
−49%
Reduced · −1.4M sh
25Core Scientific Inc New
*W EXP 01/23/202
$15.4M1.76M
1.4%
−6.8%
Reduced · −130K sh
26Karbon Cap Partners Corp
ORD SHS CL A
$15.1M1.50M
1.3%
New
New position
27Crane HBR Acquisition Corp I
UNIT 12/09/2030
$13.2M1.33M
1.2%
+36%
Added · +350K sh
28Ziff Davis Inc
NOTE 1.750%11/0
$13.0M13.10M
1.2%
+1.0%
Added · +126K sh
29Bleichroeder Acquisiti Corp
USD CL A ORD SHS
$12.6M1.26M
1.1%
New
New position
30Redwood Trust Inc
NOTE 7.750% 6/1
$12.6M12.13M
1.1%
+38%
Added · +3.3M sh
31Gesher Acquisition Corp. II
USD CL A ORD SHS
$11.3M1.09M
1.0%
Held
32Draftkings Inc New
NOTE 3/1
$11.3M12.50M
1.0%
New
New position
33Silicon Laboratories Inc
COM
$11.2M54.0K
1.0%
New
New position
34Spring Vy Acquisition Corp I
SHS CL A
$11.2M1.10M
1.0%
+16%
Added · +151K sh
35Oaktree Acquisition Corp III
SHS CL A
$10.6M1.00M
0.9%
New
New position
36Riot Platforms Inc
NOTE 0.750% 1/1
$10.3M8.90M
0.9%
+25%
Added · +1.8M sh
37Egh Acquisition Corp.
SHS CL A
$9.5M931.8K
0.8%
New
New position
38Haemonetics Corp Mass
NOTE 2.500% 6/0
$9.1M9.50M
0.8%
New
New position
39Brinks Co
COM
$8.9M86.2K
0.8%
New
New position
40Daedalus SPL Acquisition Cor
USD CL A ORD SHS
$8.8M890.0K
0.8%
New
New position
41NCL Corp Ltd
NOTE 1.125% 2/1
$8.7M8.91M
0.8%
+256%
Added · +6.4M sh
42Presidio Prodtn Co
CL A COM
$8.6M779.6K
0.8%
New
New position
43Insight Digital Partners II
CL A ORD
$7.7M769.1K
0.7%
+11%
Added · +78K sh
44Clearway Energy Inc
CL A
$7.3M187.0K
0.6%
New
New position
45Repligen Corp
NOTE 1.000%12/1
$7.3M7.50M
0.6%
New
New position
46Oneim Acquisition Corp
ORD SHS CL A
$7.0M703.0K
0.6%
New
New position
47Redfin Corp
NOTE 0.500% 4/0
$6.1M6.34M
0.5%
−64%
Reduced · −11.4M sh
48Vine Hill Cap Invts Corp II
CL A
$5.9M600.0K
0.5%
New
New position
49X3 Acquisition Corp Ltd
ORD SHS CL A
$5.9M600.0K
0.5%
New
New position
50Black Spade Acquisition III
USD CL A ORD SHS
$4.9M500.0K
0.4%
New
New position
Showing 50 of 115 positions

Largest options & derivatives disclosed

Put / call positions from the 13F — totals include every disclosed option leg

Put notional (bearish)$112.7M
Call notional (bullish)$33.7M
TypeUnderlyingNotional valueUnderlying shares
PUT · bearishWARNER BROS DISCOVERY INCWBD$73.8M2.7M
PUT · bearishELECTRONIC ARTS INCEA$38.2M187K
CALL · bullishWARNER BROS DISCOVERY INCWBD$19.2M700K
CALL · bullishTERNS PHARMACEUTICALS INC430$14.5M275K
PUT · bearishAES CORPAES$750K53K
CALL · bullishMASIMO CORPMASI$36K200

13F filers disclose option positions at the market value of the underlying the contracts reference, not the premium paid. A put is a bearish bet (it gains if the stock falls); a call is bullish. “Underlying shares” is the share count the contracts control, not a share holding. These legs are excluded from the equity book, weighting, concentration and sector figures above.

Filing history

As-of date vs the date the SEC received each filing

QuarterAs ofFiledPositionsValueForm
Q1 2026Mar 31, 2026May 15, 2026121$1.3B13F-HR
Q4 2025Dec 31, 2025Feb 17, 2026115$916.0M13F-HR
Q3 2025Sep 30, 2025Nov 14, 202590$632.0M13F-HR
Q2 2025Jun 30, 2025Aug 14, 202572$581.7M13F-HR

Data source

Holdings from SEC EDGAR 13F-HR filings, updated quarterly ~45 days after quarter-end. Public domain. The book and weighting are long equity only; disclosed put/call options are listed separately and excluded from those totals. Price-derived performance is withheld until the price-source policy and freshness gate are green.