Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3601
CALL
Sprinklr
CXM
$1.42B
| $496K | ﹤0.01% |
64,200
-24,500
| -28% | -$216K |
|
3602
CALL
Red Rock Resorts
RRR
$3.8B
| $495K | ﹤0.01% |
9,100
+3,100
| +52% | +$173K |
|
3603
PUT
VinFast Auto
VFS
$6.9B
| $495K | ﹤0.01% |
129,700
+6,600
| +5% | +$26.1K |
|
|
SDIG
3604
PUT
DELISTED
Stronghold Digital Mining, Inc. Class A Common Stock
SDIG
| $495K | ﹤0.01% |
98,100
+97,500
| +16,250% | +$384K |
|
3605
CALL
Absci
ABSI
$1.28B
| $494K | ﹤0.01% |
129,500
-71,000
| -35% | -$282K |
|
3606
CALL
Brookfield Renewable
BEP
$9.74B
| $493K | ﹤0.01% |
17,500
-4,300
| -20% | -$108K |
|
3607
Fortive
FTV
$19.2B
| $493K | ﹤0.01% |
+8,299
| New | +$457K |
|
3608
CALL
Sterling Infrastructure
STRL
$19.5B
| $493K | ﹤0.01% |
3,400
-2,300
| -40% | -$273K |
|
|
EWCZ
3609
CALL
DELISTED
European Wax Center
EWCZ
| $492K | ﹤0.01% |
72,400
+72,100
| +24,033% | +$560K |
|
3610
PUT
NiSource
NI
$22B
| $492K | ﹤0.01% |
14,200
-13,800
| -49% | -$440K |
|
3611
Invesco Mortgage Capital
IVR
$762M
| $491K | ﹤0.01% |
52,361
+12,713
| +32% | +$114K |
|
|
KOCG
3612
PUT
DELISTED
FIS Knights of Columbus Global Belief ETF
KOCG
| $491K | ﹤0.01% |
9,600
+3,300
| +52% | +$88.6K |
|
|
LAC
3613
CALL
Lithium Americas
LAC
$1.02B
| $491K | ﹤0.01% |
191,800
+34,300
| +22% | +$87.1K |
|
3614
CALL
Playtika
PLTK
$1.48B
| $491K | ﹤0.01% |
62,100
-13,700
| -18% | -$103K |
|
3615
Zimmer Biomet
ZBH
$17.8B
| $490K | ﹤0.01% |
4,543
-12,627
| -74% | -$1.38M |
|
3616
PUT
Host Hotels & Resorts
HST
$17.1B
| $489K | ﹤0.01% |
27,800
-2,800
| -9% | -$48.6K |
|
3617
PUT
International Seaways
INSW
$4.49B
| $489K | ﹤0.01% |
9,500
+7,300
| +332% | +$385K |
|
|
SUPV
3618
CALL
Grupo Supervielle
SUPV
$857M
| $489K | ﹤0.01% |
68,900
-19,200
| -22% | -$133K |
|
3619
PUT
Genuine Parts
GPC
$17.6B
| $488K | ﹤0.01% |
3,500
-8,200
| -70% | -$1.14M |
|
3620
WD-40
WDFC
$3.13B
| $487K | ﹤0.01% |
1,889
-1,271
| -40% | -$319K |
|
3621
CALL
Jones Lang LaSalle
JLL
$15.5B
| $485K | ﹤0.01% |
1,800
-3,700
| -67% | -$897K |
|
3622
PUT
BioCryst Pharmaceuticals
BCRX
$2.43B
| $484K | ﹤0.01% |
63,700
+15,600
| +32% | +$119K |
|
3623
PUT
Magnolia Oil & Gas
MGY
$5.69B
| $483K | ﹤0.01% |
19,800
+2,800
| +16% | +$70.5K |
|
|
SAND
3624
CALL
DELISTED
Sandstorm Gold
SAND
| $483K | ﹤0.01% |
80,600
+24,700
| +44% | +$140K |
|
|
AGNT
3625
PUT
AGNT Inc
AGNT
$690M
| $481K | ﹤0.01% |
34,200
-58,800
| -63% | -$758K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.