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 | |
|---|---|---|---|---|---|---|
2551
TAL Education Group
TAL
$5.71B
| $1.47M | ﹤0.01% |
124,195
+92,562
| +293% | +$852K |
|
|
SILV
2552
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $1.47M | ﹤0.01% |
158,855
-182,023
| -53% | -$1.61M |
|
2553
PUT
Axalta
AXTA
$7.01B
| $1.47M | ﹤0.01% |
40,500
+10,400
| +35% | +$365K |
|
2554
PUT
Chemours
CC
$2.59B
| $1.47M | ﹤0.01% |
72,100
+7,900
| +12% | +$162K |
|
2555
Post Holdings
POST
$4.12B
| $1.46M | ﹤0.01% |
12,639
+1,815
| +17% | +$203K |
|
2556
Iovance Biotherapeutics
IOVA
$2.23B
| $1.46M | ﹤0.01% |
155,572
+70,850
| +84% | +$671K |
|
|
LAZR
2557
CALL
DELISTED
Luminar Technologies
LAZR
| $1.46M | ﹤0.01% |
108,220
+52,693
| +95% | +$956K |
|
2558
PUT
Ardelyx
ARDX
$1.24B
| $1.46M | ﹤0.01% |
211,500
-56,500
| -21% | -$333K |
|
2559
United States Copper Index Fund
CPER
$742M
| $1.45M | ﹤0.01% |
+51,310
| New | +$1.36M |
|
2560
CoreCivic
CXW
$3.1B
| $1.45M | ﹤0.01% |
114,923
+86,688
| +307% | +$1.16M |
|
2561
CALL
MannKind Corp
MNKD
$1.28B
| $1.45M | ﹤0.01% |
231,100
+6,000
| +3% | +$34.5K |
|
2562
Fox Class A
FOXA
$23.2B
| $1.45M | ﹤0.01% |
34,316
-35,996
| -51% | -$1.4M |
|
2563
Eversource Energy
ES
$28.2B
| $1.45M | ﹤0.01% |
21,311
+14,715
| +223% | +$951K |
|
2564
PUT
Leidos
LDOS
$14.1B
| $1.45M | ﹤0.01% |
8,900
-1,000
| -10% | -$151K |
|
2565
CALL
Nano X Imaging
NNOX
$62.4M
| $1.45M | ﹤0.01% |
238,300
-107,100
| -31% | -$760K |
|
|
BRSL
2566
CALL
Brightstar Lottery PLC
BRSL
$1.91B
| $1.45M | ﹤0.01% |
67,900
-13,700
| -17% | -$294K |
|
2567
PUT
Blue Owl Capital
OBDC
$5.35B
| $1.45M | ﹤0.01% |
99,300
+24,900
| +33% | +$374K |
|
|
TIGR
2568
UP Fintech Holding
TIGR
$845M
| $1.45M | ﹤0.01% |
270,785
-207,761
| -43% | -$828K |
|
2569
CALL
Costamare
CMRE
$1.9B
| $1.44M | ﹤0.01% |
91,900
+4,000
| +5% | +$57.7K |
|
2570
CALL
Sibanye-Stillwater
SBSW
$5.92B
| $1.44M | ﹤0.01% |
351,300
+221,500
| +171% | +$940K |
|
|
PPLI
2571
PUT
People Inc
PPLI
$3.1B
| $1.44M | ﹤0.01% |
32,669
-69,727
| -68% | -$2.9M |
|
2572
PUT
Concentrix
CNXC
$1.36B
| $1.44M | ﹤0.01% |
28,100
-43,400
| -61% | -$2.91M |
|
2573
PUT
Infosys
INFY
$45B
| $1.44M | ﹤0.01% |
64,600
+14,900
| +30% | +$326K |
|
2574
PUT
Ionis Pharmaceuticals
IONS
$9.35B
| $1.44M | ﹤0.01% |
35,900
+14,000
| +64% | +$651K |
|
2575
CALL
Goodyear
GT
$2.07B
| $1.44M | ﹤0.01% |
162,400
+66,900
| +70% | +$632K |
|
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.