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 |
Alibaba
BABA
|
+$120M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$93.9M |
| 3 |
Walt Disney
DIS
|
+$71.7M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$41.7M |
| 5 |
Citigroup
C
|
+$39.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$136M |
| 2 |
Amazon
AMZN
|
+$118M |
| 3 |
SPDR Gold Trust
GLD
|
+$56.2M |
| 4 |
Microsoft
MSFT
|
+$52.4M |
| 5 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$45.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.33% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Communication Services | 0.21% |
| 4 | Financials | 0.19% |
| 5 | Healthcare | 0.19% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
951
CALL
Equinor
EQNR
$97.4B
| $12.6M | 0.01% |
397,600
+12,500
| +3% | +$405K |
|
952
PUT
Matador Resources
MTDR
$6.42B
| $12.6M | 0.01% |
220,900
+69,400
| +46% | +$4.06M |
|
953
CALL
Packaging Corp of America
PKG
$20.8B
| $12.6M | 0.01% |
77,100
+23,200
| +43% | +$3.65M |
|
954
CALL
Baker Hughes
BKR
$55.6B
| $12.6M | 0.01% |
367,300
+137,300
| +60% | +$4.68M |
|
955
CALL
Cheniere Energy
LNG
$57B
| $12.5M | 0.01% |
73,500
+12,000
| +20% | +$2.06M |
|
956
PUT
Intercontinental Exchange
ICE
$81B
| $12.5M | 0.01% |
97,600
-20,500
| -17% | -$2.32M |
|
957
CALL
HSBC
HSBC
$349B
| $12.5M | 0.01% |
308,800
-9,100
| -3% | -$352K |
|
958
CALL
Nutrien
NTR
$32.9B
| $12.5M | 0.01% |
221,600
+20,200
| +10% | +$1.14M |
|
959
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.3M
| $12.5M | 0.01% |
647,600
+55,800
| +9% | +$5.05M |
|
960
CALL
Lantheus
LNTH
$6.75B
| $12.4M | 0.01% |
200,200
+179,500
| +867% | +$12.2M |
|
|
SCIU
961
PUT
DELISTED
Global X Scientific Beta US ETF
SCIU
| $12.4M | 0.01% |
450,900
+168,300
| +60% | +$4.62M |
|
962
PUT
Southern Company
SO
$109B
| $12.4M | 0.01% |
176,200
+4,900
| +3% | +$336K |
|
963
PUT
Danaos Corp
DAC
$2.5B
| $12.4M | 0.01% |
166,800
+111,700
| +203% | +$7.59M |
|
964
CALL
Kimberly-Clark
KMB
$35.6B
| $12.3M | 0.01% |
101,600
+27,300
| +37% | +$3.3M |
|
965
CALL
Conagra Brands
CAG
$6.88B
| $12.3M | 0.01% |
429,200
+175,000
| +69% | +$4.9M |
|
966
PUT
ProShares Ultra S&P500
SSO
$7.82B
| $12.3M | 0.01% |
359,600
-59,400
| -14% | -$1.71M |
|
967
CALL
Cenovus Energy
CVE
$55.4B
| $12.3M | 0.01% |
737,500
+325,900
| +79% | +$5.97M |
|
968
ProShares Bitcoin Strategy ETF
BITO
$1.42B
| $12.2M | 0.01% |
596,737
+528,205
| +771% | +$9.56M |
|
969
PUT
Realty Income
O
$60.4B
| $12.2M | 0.01% |
211,700
-12,500
| -6% | -$656K |
|
970
PUT
UiPath
PATH
$5.28B
| $12.1M | 0.01% |
487,600
+162,200
| +50% | +$3.17M |
|
|
MASI
971
CALL
DELISTED
Masimo
MASI
| $12.1M | 0.01% |
103,200
+44,700
| +76% | +$4.17M |
|
972
PUT
Academy Sports + Outdoors
ASO
$2.92B
| $12.1M | 0.01% |
182,700
+63,700
| +54% | +$3.23M |
|
973
CALL
Repligen
RGEN
$7.76B
| $12M | 0.01% |
67,000
+65,300
| +3,841% | +$10.2M |
|
974
PUT
Tractor Supply
TSCO
$15.9B
| $12M | 0.01% |
279,500
-18,000
| -6% | -$735K |
|
975
CALL
Cardinal Health
CAH
$52.9B
| $12M | 0.01% |
119,200
+25,600
| +27% | +$2.54M |
|
Similar funds
Simplex Trading's Q4 2023 Portfolio in Review
As of Q4 2023, Simplex Trading held 10,333 positions worth $156B, up 23% from $127B the previous quarter. Its ten largest holdings account for 42% of the portfolio.
Simplex Trading deployed $15.1B of net new capital in Q4 2023, opening 1,639 new positions and adding to 3,920 existing holdings. Its largest new stake was Walt Disney: 812,984 shares worth $73.4M.
By sector, the portfolio is most concentrated in Technology at 0.33% of assets, down from 0.44% a quarter earlier, followed by Consumer Discretionary and Communication Services.
On the sell side, the largest reduction was iShares 20+ Year Treasury Bond ETF, an estimated $136M trimmed.
- Simplex Trading's largest Q4 2023 buy was Walt Disney: 812,984 shares worth $73.4M.
- Simplex Trading added most to Alibaba in Q4 2023, an estimated $120M increase.
- Simplex Trading's biggest Q4 2023 reduction was iShares 20+ Year Treasury Bond ETF, cutting an estimated $136M.
- Simplex Trading fully exited Amazon in Q4 2023, selling an estimated $118M.
- Simplex Trading's ten largest holdings make up 42% of its $156B portfolio in Q4 2023.
- Simplex Trading opened 1,639 new positions and closed 1,508 in Q4 2023.
- Simplex Trading's portfolio value rose 23% quarter-over-quarter to $156B.
Based on Simplex Trading's 13F filing for Q4 2023, filed 2 Feb 2024.