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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2226
CALL
Mettler-Toledo International
MTD
$26.8B
| $2.4M | ﹤0.01% |
1,800
+900
| +100% | +$1.11M |
|
2227
PUT
AppFolio
APPF
$5.85B
| $2.39M | ﹤0.01% |
9,700
+900
| +10% | +$194K |
|
|
MASI
2228
PUT
DELISTED
Masimo
MASI
| $2.39M | ﹤0.01% |
16,300
-28,100
| -63% | -$3.63M |
|
2229
CALL
Dutch Bros
BROS
$8.78B
| $2.39M | ﹤0.01% |
72,500
-110,100
| -60% | -$3.25M |
|
2230
PUT
Intrepid Potash
IPI
$460M
| $2.39M | ﹤0.01% |
114,700
+112,500
| +5,114% | +$2.24M |
|
|
ACB
2231
CALL
Aurora Cannabis
ACB
$165M
| $2.38M | ﹤0.01% |
543,300
+472,960
| +672% | +$1.83M |
|
2232
PUT
Krystal Biotech
KRYS
$9.88B
| $2.38M | ﹤0.01% |
13,400
+6,400
| +91% | +$889K |
|
2233
PUT
MACOM Technology Solutions
MTSI
$20.4B
| $2.38M | ﹤0.01% |
24,900
+20,800
| +507% | +$1.84M |
|
2234
CALL
Vista Energy
VIST
$7.75B
| $2.38M | ﹤0.01% |
57,500
-1,200
| -2% | -$41.7K |
|
2235
CALL
LPL Financial
LPLA
$26.3B
| $2.38M | ﹤0.01% |
9,000
+4,900
| +120% | +$1.24M |
|
2236
PUT
Opendoor
OPEN
$3.69B
| $2.38M | ﹤0.01% |
810,650
+159,133
| +24% | +$497K |
|
2237
CALL
Papa John's
PZZA
$999M
| $2.38M | ﹤0.01% |
35,700
+6,100
| +21% | +$440K |
|
2238
PUT
FTI Consulting
FCN
$4.82B
| $2.38M | ﹤0.01% |
11,300
+10,700
| +1,783% | +$2.15M |
|
2239
PUT
Leggett & Platt
LEG
$1.52B
| $2.37M | ﹤0.01% |
124,000
+66,600
| +116% | +$1.45M |
|
2240
PUT
Packaging Corp of America
PKG
$22.7B
| $2.37M | ﹤0.01% |
12,500
+8,100
| +184% | +$1.4M |
|
2241
PUT
SM Energy
SM
$7.96B
| $2.37M | ﹤0.01% |
47,600
+27,600
| +138% | +$1.13M |
|
2242
PUT
Royalty Pharma
RPRX
$26.1B
| $2.37M | ﹤0.01% |
78,100
-97,500
| -56% | -$2.87M |
|
2243
CALL
Invesco
IVZ
$13.3B
| $2.37M | ﹤0.01% |
142,900
+47,400
| +50% | +$765K |
|
|
BERY
2244
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $2.36M | ﹤0.01% |
42,580
-111,840
| -72% | -$6.36M |
|
2245
CALL
Trupanion
TRUP
$1.05B
| $2.36M | ﹤0.01% |
85,600
+8,900
| +12% | +$248K |
|
|
SMAR
2246
PUT
DELISTED
Smartsheet Inc.
SMAR
| $2.36M | ﹤0.01% |
61,200
+19,900
| +48% | +$868K |
|
|
MAXN
2247
CALL
DELISTED
Maxeon Solar Technologies
MAXN
| $2.35M | ﹤0.01% |
7,074
+2,515
| +55% | +$1.13M |
|
2248
CALL
WD-40
WDFC
$3.1B
| $2.35M | ﹤0.01% |
9,300
+8,900
| +2,225% | +$2.3M |
|
2249
PUT
Macerich
MAC
$7.32B
| $2.35M | ﹤0.01% |
136,100
-135,700
| -50% | -$2.21M |
|
|
SUM
2250
PUT
DELISTED
Summit Materials, Inc. Class A Common Stock
SUM
| $2.34M | ﹤0.01% |
52,600
+52,500
| +52,500% | +$2.08M |
|
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Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.