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 | |
|---|---|---|---|---|---|---|
3151
CALL
Korn Ferry
KFY
$3.98B
| $854K | ﹤0.01% |
14,400
+14,300
| +14,300% | +$730K |
|
3152
PUT
ArcBest
ARCB
$3.44B
| $853K | ﹤0.01% |
7,100
-4,700
| -40% | -$521K |
|
3153
CALL
Pacific Biosciences
PACB
$422M
| $852K | ﹤0.01% |
86,900
-4,800
| -5% | -$39.3K |
|
|
CERE
3154
PUT
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $852K | ﹤0.01% |
20,100
-29,700
| -60% | -$853K |
|
3155
CALL
First Citizens BancShares
FCNCA
$24.6B
| $851K | ﹤0.01% |
600
-4,700
| -89% | -$6.6M |
|
3156
CALL
Houlihan Lokey
HLI
$9.68B
| $851K | ﹤0.01% |
+7,100
| New | +$770K |
|
3157
CALL
Progyny
PGNY
$2.44B
| $851K | ﹤0.01% |
22,900
+18,100
| +377% | +$608K |
|
3158
PUT
Icon
ICLR
$12.8B
| $849K | ﹤0.01% |
3,000
+1,800
| +150% | +$466K |
|
3159
Intrepid Potash
IPI
$460M
| $849K | ﹤0.01% |
+35,566
| New | +$752K |
|
3160
Direxion Daily TSLA Bull 2X ETF
TSLL
$2.48B
| $848K | ﹤0.01% |
59,091
-36,540
| -38% | -$511K |
|
3161
FLEX LNG
FLNG
$1.67B
| $847K | ﹤0.01% |
29,174
+11,890
| +69% | +$357K |
|
3162
CALL
Equinox Gold
EQX
$7.32B
| $846K | ﹤0.01% |
173,100
-61,200
| -26% | -$290K |
|
3163
CALL
indie Semiconductor
INDI
$733M
| $846K | ﹤0.01% |
104,400
+27,400
| +36% | +$179K |
|
3164
PUT
Teucrium Agricultural Fund
TAGS
$19.6M
| $846K | ﹤0.01% |
85,500
+30,100
| +54% | +$921K |
|
|
AGNT
3165
CALL
AGNT Inc
AGNT
$665M
| $845K | ﹤0.01% |
54,500
+34,700
| +175% | +$485K |
|
3166
CALL
FuelCell Energy
FCEL
$1.7B
| $844K | ﹤0.01% |
17,587
+4,300
| +32% | +$165K |
|
|
CCC
3167
PUT
CCC Intelligent Solutions
CCC
$3.42B
| $843K | ﹤0.01% |
74,100
+63,300
| +586% | +$739K |
|
|
CRON
3168
PUT
Cronos Group
CRON
$1.05B
| $843K | ﹤0.01% |
403,500
+133,800
| +50% | +$260K |
|
3169
PUT
Merit Medical Systems
MMSI
$4.43B
| $843K | ﹤0.01% |
11,100
+10,900
| +5,450% | +$761K |
|
|
NVRO
3170
PUT
DELISTED
NEVRO CORP.
NVRO
| $843K | ﹤0.01% |
39,200
+27,400
| +232% | +$489K |
|
3171
PUT
RenaissanceRe
RNR
$13.7B
| $842K | ﹤0.01% |
4,300
+2,900
| +207% | +$603K |
|
3172
PUT
Targa Resources
TRGP
$60.4B
| $842K | ﹤0.01% |
9,700
+3,300
| +52% | +$283K |
|
3173
Warby Parker
WRBY
$3.01B
| $842K | ﹤0.01% |
59,783
+25,435
| +74% | +$317K |
|
3174
CALL
Xponential Fitness
XPOF
$265M
| $839K | ﹤0.01% |
65,100
-20,800
| -24% | -$282K |
|
3175
CALL
Full Truck Alliance
YMM
$9.56B
| $839K | ﹤0.01% |
119,700
+89,700
| +299% | +$633K |
|
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.