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 | |
|---|---|---|---|---|---|---|
|
BNY
851
PUT
Bank of New York Mellon
BNY
$109B
| $13.5M | 0.01% |
188,300
-17,400
| -8% | -$1.14M |
|
852
PUT
Arbor Realty Trust
ABR
$966M
| $13.5M | 0.01% |
868,700
+83,100
| +11% | +$1.15M |
|
853
PUT
Skyworks Solutions
SWKS
$9.1B
| $13.5M | 0.01% |
136,800
-52,500
| -28% | -$5.57M |
|
854
PUT
SAP
SAP
$171B
| $13.5M | 0.01% |
58,900
+300
| +0.5% | +$63.8K |
|
|
855
CALL
Arbor Realty Trust
ABR
$966M
| $13.5M | 0.01% |
866,800
-426,500
| -33% | -$5.92M |
|
856
PUT
Realty Income
O
$60.4B
| $13.5M | 0.01% |
212,600
-79,600
| -27% | -$4.74M |
|
857
PUT
Dow Inc
DOW
$22.3B
| $13.5M | 0.01% |
246,700
-166,400
| -40% | -$8.78M |
|
858
PUT
Truist Financial
TFC
$62.5B
| $13.5M | 0.01% |
314,900
-136,700
| -30% | -$5.77M |
|
|
ZVOL
859
CALL
Volatility Premium Plus ETF
ZVOL
$12.9M
| $13.4M | 0.01% |
480,700
+234,200
| +95% | +$5.06M |
|
860
CALL
Simon Property Group
SPG
$73B
| $13.4M | 0.01% |
79,500
-47,000
| -37% | -$7.44M |
|
861
PUT
AstraZeneca
AZN
$261B
| $13.4M | 0.01% |
85,800
-27,050
| -24% | -$4.37M |
|
862
CALL
Toll Brothers
TOL
$13.7B
| $13.3M | 0.01% |
86,300
+8,000
| +10% | +$1.08M |
|
863
CALL
CF Industries
CF
$19.5B
| $13.3M | 0.01% |
155,100
-59,300
| -28% | -$4.59M |
|
864
Estee Lauder
EL
$28.9B
| $13.3M | 0.01% |
+133,458
| New | +$12.7M |
|
|
FISV
865
CALL
Fiserv Inc
FISV
$26.6B
| $13.3M | 0.01% |
74,000
-59,200
| -44% | -$9.76M |
|
866
PUT
XPeng
XPEV
$12.2B
| $13.2M | 0.01% |
1,086,600
+333,000
| +44% | +$2.76M |
|
867
ProShares Short QQQ
PSQ
$686M
| $13.2M | 0.01% |
333,536
+147,835
| +80% | +$6.09M |
|
868
PUT
Zimmer Biomet
ZBH
$17.3B
| $13.1M | 0.01% |
121,500
-27,600
| -19% | -$3.01M |
|
869
CALL
Norwegian Cruise Line
NCLH
$8.59B
| $13.1M | 0.01% |
638,200
-327,100
| -34% | -$5.94M |
|
870
CALL
Crown Castle
CCI
$32.5B
| $13.1M | 0.01% |
110,100
-103,100
| -48% | -$11.4M |
|
871
Twilio
TWLO
$28.1B
| $13M | 0.01% |
200,078
-41,493
| -17% | -$2.48M |
|
872
PUT
UiPath
PATH
$5.28B
| $13M | 0.01% |
1,018,100
-157,300
| -13% | -$1.93M |
|
873
PUT
T. Rowe Price
TROW
$24.6B
| $13M | 0.01% |
119,500
+21,600
| +22% | +$2.37M |
|
874
CALL
ResMed
RMD
$27.8B
| $13M | 0.01% |
53,200
-18,100
| -25% | -$4.04M |
|
875
PUT
Universal Display
OLED
$3.71B
| $13M | 0.01% |
61,800
+51,700
| +512% | +$10.5M |
|
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.