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 | |
|---|---|---|---|---|---|---|
|
HCP
1326
CALL
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $7.31M | ﹤0.01% |
271,300
-39,300
| -13% | -$952K |
|
1327
CALL
Vail Resorts
MTN
$5.19B
| $7.31M | ﹤0.01% |
32,800
+20,400
| +165% | +$4.54M |
|
1328
PUT
Trane Technologies
TT
$106B
| $7.29M | ﹤0.01% |
24,300
+600
| +3% | +$163K |
|
1329
PUT
Novavax
NVAX
$1.23B
| $7.29M | ﹤0.01% |
1,525,900
+1,279,300
| +519% | +$5.93M |
|
1330
PUT
Lattice Semiconductor
LSCC
$17.6B
| $7.28M | ﹤0.01% |
93,100
+48,700
| +110% | +$3.49M |
|
|
BRSL
1331
PUT
Brightstar Lottery PLC
BRSL
$1.91B
| $7.28M | ﹤0.01% |
322,200
+176,700
| +121% | +$4.43M |
|
1332
PUT
CME Group
CME
$92.2B
| $7.28M | ﹤0.01% |
33,800
-111,100
| -77% | -$23.3M |
|
|
AXON
1333
PUT
Axon Enterprise
AXON
$40.5B
| $7.26M | ﹤0.01% |
23,200
-38,600
| -62% | -$10.7M |
|
1334
CALL
ClearShares Piton Intermediate Fixed Income ETF
PIFI
$97.5M
| $7.25M | ﹤0.01% |
344,200
-303,400
| -47% | -$27.9M |
|
1335
Alcoa
AA
$11.7B
| $7.25M | ﹤0.01% |
214,421
-132,911
| -38% | -$3.89M |
|
1336
CALL
IQVIA
IQV
$34.7B
| $7.23M | ﹤0.01% |
28,600
+21,900
| +327% | +$5.11M |
|
1337
CALL
M&T Bank
MTB
$36.2B
| $7.21M | ﹤0.01% |
49,600
-14,000
| -22% | -$1.94M |
|
1338
CALL
Astera Labs
ALAB
$50B
| $7.21M | ﹤0.01% |
+97,200
| New | +$7.2M |
|
1339
PUT
AeroVironment
AVAV
$7.57B
| $7.2M | ﹤0.01% |
47,000
+37,400
| +390% | +$4.99M |
|
1340
CALL
Iron Mountain
IRM
$38.2B
| $7.19M | ﹤0.01% |
89,700
-12,600
| -12% | -$912K |
|
1341
CALL
Keysight
KEYS
$54.5B
| $7.19M | ﹤0.01% |
46,000
-42,400
| -48% | -$6.52M |
|
|
CTRA
1342
PUT
DELISTED
Coterra Energy
CTRA
| $7.19M | ﹤0.01% |
257,800
-24,800
| -9% | -$636K |
|
1343
PUT
Textron
TXT
$16.6B
| $7.17M | ﹤0.01% |
74,700
+32,400
| +77% | +$2.8M |
|
1344
Transocean
RIG
$5.92B
| $7.15M | ﹤0.01% |
1,138,322
+976,900
| +605% | +$5.33M |
|
1345
CALL
Ovintiv
OVV
$17.7B
| $7.13M | ﹤0.01% |
137,400
-96,400
| -41% | -$4.39M |
|
1346
CALL
Fluor
FLR
$7.29B
| $7.12M | ﹤0.01% |
168,300
+65,600
| +64% | +$2.52M |
|
1347
PUT
Corebridge Financial
CRBG
$14.1B
| $7.11M | ﹤0.01% |
247,600
+239,400
| +2,920% | +$5.91M |
|
1348
CALL
DaVita
DVA
$15.1B
| $7.11M | ﹤0.01% |
51,500
-150,900
| -75% | -$18.1M |
|
1349
PUT
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$135M
| $7.1M | ﹤0.01% |
170,400
+156,600
| +1,135% | +$3.03M |
|
1350
CALL
StoneCo
STNE
$2.62B
| $7.08M | ﹤0.01% |
426,000
+45,300
| +12% | +$777K |
|
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.