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 | |
|---|---|---|---|---|---|---|
1876
CALL
Central Garden & Pet Co Class A
CENTA
$2.41B
| $3.16M | ﹤0.01% |
86,700
+86,600
| +86,600% | +$2.88M |
|
1877
CALL
New Oriental
EDU
$7.84B
| $3.15M | ﹤0.01% |
41,600
+18,500
| +80% | +$1.27M |
|
1878
Johnson Controls International
JCI
$87.5B
| $3.15M | ﹤0.01% |
40,626
-15,171
| -27% | -$1.06M |
|
1879
CALL
Ryder
R
$10.3B
| $3.15M | ﹤0.01% |
21,600
+12,500
| +137% | +$1.69M |
|
1880
PUT
Trane Technologies
TT
$106B
| $3.15M | ﹤0.01% |
8,100
-14,800
| -65% | -$5.13M |
|
1881
CALL
MSCI
MSCI
$40B
| $3.15M | ﹤0.01% |
5,400
-800
| -13% | -$434K |
|
1882
CALL
Gold Fields
GFI
$29.2B
| $3.15M | ﹤0.01% |
205,000
-91,700
| -31% | -$1.42M |
|
1883
CRISPR Therapeutics
CRSP
$4.58B
| $3.14M | ﹤0.01% |
+66,880
| New | +$3.39M |
|
1884
CALL
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $3.14M | ﹤0.01% |
30,500
+12,400
| +69% | +$1.26M |
|
1885
CALL
Moody's
MCO
$81.7B
| $3.13M | ﹤0.01% |
6,600
-5,300
| -45% | -$2.46M |
|
1886
CALL
Ovintiv
OVV
$17.5B
| $3.13M | ﹤0.01% |
81,700
+48,800
| +148% | +$2.11M |
|
1887
Oracle
ORCL
$331B
| $3.13M | ﹤0.01% |
+18,353
| New | +$2.66M |
|
1888
CALL
Wabtec
WAB
$51.1B
| $3.13M | ﹤0.01% |
17,200
-4,300
| -20% | -$705K |
|
1889
PUT
ArcelorMittal
MT
$50.4B
| $3.12M | ﹤0.01% |
119,000
+29,400
| +33% | +$673K |
|
1890
PUT
Vanguard Consumer Discretionary ETF
VCR
$5.84B
| $3.12M | ﹤0.01% |
6,700
+2,800
| +72% | +$894K |
|
1891
PUT
Community Health Systems
CYH
$385M
| $3.12M | ﹤0.01% |
514,500
-5,700
| -1% | -$28K |
|
1892
PUT
Valaris
VAL
$5.51B
| $3.12M | ﹤0.01% |
56,000
+14,100
| +34% | +$924K |
|
|
1893
Starbucks
SBUX
$118B
| $3.11M | ﹤0.01% |
31,915
-414,331
| -93% | -$35.5M |
|
1894
CALL
O'Reilly Automotive
ORLY
$72.4B
| $3.11M | ﹤0.01% |
40,500
-19,500
| -33% | -$1.43M |
|
1895
Starwood Property Trust
STWD
$6.12B
| $3.1M | ﹤0.01% |
152,287
+92,797
| +156% | +$1.85M |
|
|
GRMN
1896
PUT
Garmin
GRMN
$46.9B
| $3.1M | ﹤0.01% |
17,600
+4,300
| +32% | +$743K |
|
1897
CALL
Huntington Bancshares
HBAN
$35.1B
| $3.1M | ﹤0.01% |
210,700
+79,100
| +60% | +$1.12M |
|
1898
Factset
FDS
$9.05B
| $3.1M | ﹤0.01% |
+6,733
| New | +$2.86M |
|
1899
CALL
Infosys
INFY
$45B
| $3.09M | ﹤0.01% |
138,700
-17,800
| -11% | -$389K |
|
1900
ZIM Integrated Shipping Services
ZIM
$3B
| $3.09M | ﹤0.01% |
120,366
-34,321
| -22% | -$667K |
|
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.