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 | |
|---|---|---|---|---|---|---|
1801
PUT
Iovance Biotherapeutics
IOVA
$2.23B
| $3.47M | ﹤0.01% |
369,700
+73,700
| +25% | +$698K |
|
1802
CALL
AeroVironment
AVAV
$7.57B
| $3.47M | ﹤0.01% |
17,300
-63,900
| -79% | -$11.5M |
|
|
CNR
1803
CALL
Core Natural Resources Inc
CNR
$4.19B
| $3.46M | ﹤0.01% |
33,100
+6,000
| +22% | +$584K |
|
1804
PUT
Centrus Energy
LEU
$3.22B
| $3.46M | ﹤0.01% |
63,100
+32,600
| +107% | +$1.36M |
|
1805
Xcel Energy
XEL
$51B
| $3.45M | ﹤0.01% |
52,891
+21,905
| +71% | +$1.3M |
|
1806
CALL
Compass
COMP
$8.27B
| $3.45M | ﹤0.01% |
565,000
+248,700
| +79% | +$1.22M |
|
1807
CALL
Henry Schein
HSIC
$9.74B
| $3.45M | ﹤0.01% |
47,300
+27,100
| +134% | +$1.88M |
|
1808
UiPath
PATH
$5.62B
| $3.44M | ﹤0.01% |
+269,011
| New | +$3.29M |
|
1809
PUT
Rambus
RMBS
$10.4B
| $3.44M | ﹤0.01% |
81,400
+32,400
| +66% | +$1.57M |
|
1810
CALL
Regal Rexnord
RRX
$14.2B
| $3.43M | ﹤0.01% |
20,700
+9,900
| +92% | +$1.53M |
|
|
TIGR
1811
PUT
UP Fintech Holding
TIGR
$845M
| $3.43M | ﹤0.01% |
642,500
-156,400
| -20% | -$623K |
|
1812
CALL
Agilent Technologies
A
$39.1B
| $3.43M | ﹤0.01% |
23,100
-17,900
| -44% | -$2.45M |
|
1813
ARK Innovation ETF
ARKK
$5.89B
| $3.42M | ﹤0.01% |
72,073
+52,684
| +272% | +$2.37M |
|
1814
PUT
Veralto
VLTO
$22.6B
| $3.42M | ﹤0.01% |
30,600
-5,800
| -16% | -$613K |
|
|
FFAI
1815
CALL
Faraday Future Intelligent Electric
FFAI
$15.8M
| $3.42M | ﹤0.01% |
7,946
+7,513
| +1,735% | +$10.5M |
|
1816
CALL
US Foods
USFD
$21.4B
| $3.41M | ﹤0.01% |
55,500
+32,000
| +136% | +$1.79M |
|
1817
PUT
Vestis
VSTS
$2.06B
| $3.41M | ﹤0.01% |
229,000
-49,800
| -18% | -$668K |
|
1818
PUT
Fortis
FTS
$30B
| $3.41M | ﹤0.01% |
75,000
| – | – |
|
1819
PUT
Evolv Technologies
EVLV
$943M
| $3.4M | ﹤0.01% |
840,300
+454,900
| +118% | +$1.59M |
|
1820
CALL
Telephone and Data Systems
TDS
$3.91B
| $3.4M | ﹤0.01% |
146,400
-34,200
| -19% | -$745K |
|
1821
CALL
Darling Ingredients
DAR
$9.93B
| $3.4M | ﹤0.01% |
91,500
-6,800
| -7% | -$256K |
|
1822
PUT
OSI Systems
OSIS
$3.57B
| $3.4M | ﹤0.01% |
22,400
+21,900
| +4,380% | +$3.15M |
|
1823
PUT
Copart
CPRT
$25.9B
| $3.4M | ﹤0.01% |
64,800
+9,000
| +16% | +$467K |
|
|
BPMC
1824
PUT
DELISTED
Blueprint Medicines
BPMC
| $3.39M | ﹤0.01% |
36,700
+4,500
| +14% | +$447K |
|
1825
CALL
Ormat Technologies
ORA
$6.11B
| $3.39M | ﹤0.01% |
44,100
+1,600
| +4% | +$119K |
|
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.