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 | |
|---|---|---|---|---|---|---|
2026
PUT
Edison International
EIX
$30.7B
| $2.94M | ﹤0.01% |
41,200
+31,200
| +312% | +$2.05M |
|
2027
CALL
FMC
FMC
$1.42B
| $2.94M | ﹤0.01% |
46,700
-12,500
| -21% | -$725K |
|
2028
CALL
PJT Partners
PJT
$4.37B
| $2.94M | ﹤0.01% |
28,900
+28,700
| +14,350% | +$2.47M |
|
2029
CALL
HUB Group
HUBG
$3.01B
| $2.94M | ﹤0.01% |
+64,000
| New | +$2.51M |
|
2030
PUT
Vanguard Short-Term Treasury ETF
VGSH
$29.3B
| $2.93M | ﹤0.01% |
45,900
+17,900
| +64% | +$1.03M |
|
2031
CALL
Nano X Imaging
NNOX
$62.4M
| $2.93M | ﹤0.01% |
459,900
-3,600
| -0.8% | -$22.5K |
|
2032
CALL
Brink's
BCO
$5.02B
| $2.93M | ﹤0.01% |
33,300
+31,100
| +1,414% | +$2.39M |
|
2033
CALL
Group 1 Automotive
GPI
$3.94B
| $2.92M | ﹤0.01% |
9,600
+6,800
| +243% | +$1.85M |
|
2034
PUT
Hawaiian Electric Industries
HE
$2.33B
| $2.92M | ﹤0.01% |
206,100
-410,000
| -67% | -$5.33M |
|
|
AGNT
2035
PUT
AGNT Inc
AGNT
$664M
| $2.92M | ﹤0.01% |
188,300
+178,000
| +1,728% | +$2.49M |
|
2036
PUT
TechnipFMC
FTI
$30.6B
| $2.92M | ﹤0.01% |
145,100
-7,600
| -5% | -$156K |
|
2037
VF Corp
VFC
$6.68B
| $2.92M | ﹤0.01% |
155,317
-115,059
| -43% | -$1.97M |
|
2038
Darden Restaurants
DRI
$22.5B
| $2.92M | ﹤0.01% |
+17,747
| New | +$2.69M |
|
|
MRTX
2039
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $2.91M | ﹤0.01% |
49,585
-6,848
| -12% | -$385K |
|
2040
CALL
Aramark
ARMK
$15B
| $2.91M | ﹤0.01% |
125,000
+67,799
| +119% | +$1.84M |
|
|
GRMN
2041
CALL
Garmin
GRMN
$46.9B
| $2.9M | ﹤0.01% |
22,600
+6,600
| +41% | +$765K |
|
2042
CALL
PTC
PTC
$13.7B
| $2.9M | ﹤0.01% |
16,600
-3,000
| -15% | -$460K |
|
2043
CALL
NiSource
NI
$22.4B
| $2.9M | ﹤0.01% |
109,100
+95,100
| +679% | +$2.44M |
|
2044
CALL
Exelixis
EXEL
$13.9B
| $2.89M | ﹤0.01% |
120,500
-70,400
| -37% | -$1.53M |
|
2045
BWX Technologies
BWXT
$16B
| $2.88M | ﹤0.01% |
37,536
-16,142
| -30% | -$1.24M |
|
2046
Perrigo
PRGO
$1.4B
| $2.88M | ﹤0.01% |
89,475
+67,755
| +312% | +$2.03M |
|
2047
Nexstar Media Group
NXST
$5.6B
| $2.88M | ﹤0.01% |
18,348
+5,903
| +47% | +$864K |
|
2048
PUT
Urban Outfitters
URBN
$5.99B
| $2.88M | ﹤0.01% |
80,600
+74,100
| +1,140% | +$2.58M |
|
2049
CALL
Albertsons Companies
ACI
$5.4B
| $2.88M | ﹤0.01% |
125,000
-70,000
| -36% | -$1.55M |
|
2050
CALL
United States Brent Oil Fund
BNO
$815M
| $2.88M | ﹤0.01% |
105,300
+76,500
| +266% | +$2.24M |
|
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.