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 | |
|---|---|---|---|---|---|---|
1251
CALL
AerCap
AER
$23.9B
| $8.26M | ﹤0.01% |
95,000
+51,300
| +117% | +$4.03M |
|
1252
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $8.26M | ﹤0.01% |
82,800
+29,300
| +55% | +$2.94M |
|
1253
PUT
Zimmer Biomet
ZBH
$17.7B
| $8.22M | ﹤0.01% |
62,300
-30,500
| -33% | -$3.81M |
|
1254
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $8.18M | ﹤0.01% |
106,500
-23,100
| -18% | -$1.57M |
|
1255
PUT
Dave & Buster's
PLAY
$343M
| $8.18M | ﹤0.01% |
130,600
-29,000
| -18% | -$1.66M |
|
|
ITCI
1256
CALL
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $8.17M | ﹤0.01% |
118,100
+69,600
| +144% | +$4.78M |
|
1257
PUT
Quest Diagnostics
DGX
$25.1B
| $8.15M | ﹤0.01% |
61,200
+16,800
| +38% | +$2.18M |
|
|
EXAS
1258
DELISTED
Exact Sciences
EXAS
| $8.14M | ﹤0.01% |
117,868
+102,079
| +647% | +$6.46M |
|
1259
CALL
Mohawk Industries
MHK
$6.9B
| $8.13M | ﹤0.01% |
62,100
+17,900
| +40% | +$2.01M |
|
1260
CALL
NOV
NOV
$7.45B
| $8.1M | ﹤0.01% |
414,800
+174,300
| +72% | +$3.24M |
|
1261
CALL
AES
AES
$10.6B
| $8.08M | ﹤0.01% |
450,600
-284,200
| -39% | -$4.75M |
|
1262
PUT
ArcBest
ARCB
$3.44B
| $8.06M | ﹤0.01% |
56,600
+49,500
| +697% | +$6.48M |
|
1263
PUT
Freshpet
FRPT
$2.83B
| $8.06M | ﹤0.01% |
69,600
-27,100
| -28% | -$2.62M |
|
|
QLTB
1264
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $8.05M | ﹤0.01% |
47,100
+43,000
| +1,049% | +$7.35M |
|
1265
PUT
Insmed
INSM
$23.2B
| $8.02M | ﹤0.01% |
295,700
+285,500
| +2,799% | +$7.99M |
|
1266
CALL
International Flavors & Fragrances
IFF
$19.4B
| $8.01M | ﹤0.01% |
93,200
+16,000
| +21% | +$1.28M |
|
|
DOOR
1267
PUT
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $7.99M | ﹤0.01% |
60,800
+58,900
| +3,100% | +$6.64M |
|
1268
PUT
Nutanix
NTNX
$14.9B
| $7.99M | ﹤0.01% |
129,400
+63,500
| +96% | +$3.66M |
|
1269
Pinterest
PINS
$12.4B
| $7.97M | ﹤0.01% |
+230,005
| New | +$8.36M |
|
1270
PUT
Molson Coors Class B
TAP
$7.68B
| $7.97M | ﹤0.01% |
118,500
+23,300
| +24% | +$1.48M |
|
1271
CALL
The GEO Group
GEO
$4.13B
| $7.97M | ﹤0.01% |
564,200
-254,700
| -31% | -$3.03M |
|
1272
PUT
Signet Jewelers
SIG
$3.55B
| $7.96M | ﹤0.01% |
79,500
-28,900
| -27% | -$2.89M |
|
|
DAY
1273
CALL
DELISTED
Dayforce
DAY
| $7.95M | ﹤0.01% |
120,100
+5,200
| +5% | +$355K |
|
|
1274
CALL
McCormick & Company Non-Voting
MKC
$13.4B
| $7.92M | ﹤0.01% |
103,100
+20,000
| +24% | +$1.36M |
|
1275
AstraZeneca
AZN
$263B
| $7.91M | ﹤0.01% |
+58,402
| New | +$7.73M |
|
Similar funds
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.