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 | |
|---|---|---|---|---|---|---|
7401
CytomX Therapeutics
CTMX
$701M
| $13K | ﹤0.01% |
+6,064
| New | +$11.2K |
|
7402
iShares MSCI Singapore ETF
EWS
$1.03B
| $13K | ﹤0.01% |
714
+524
| +276% | +$9.45K |
|
7403
5E Advanced Materials
FEAM
$46.5M
| $13K | ﹤0.01% |
428
+230
| +116% | +$7.22K |
|
7404
PUT
Flux Power
FLUX
$12.1M
| $13K | ﹤0.01% |
3,000
+1,500
| +100% | +$6.96K |
|
|
FSP
7405
PUT
Franklin Street Properties
FSP
$50.1M
| $13K | ﹤0.01% |
5,900
+600
| +11% | +$1.43K |
|
7406
CALL
Flotek Industries
FTK
$856M
| $13K | ﹤0.01% |
3,500
-3,200
| -48% | -$10.3K |
|
|
GB
7407
DELISTED
Global Blue Group Holding
GB
| $13K | ﹤0.01% |
2,655
-2,964
| -53% | -$13.8K |
|
7408
CALL
Haverty Furniture Companies
HVT
$421M
| $13K | ﹤0.01% |
400
-800
| -67% | -$27.2K |
|
|
IMMP
7409
PUT
Immutep
IMMP
$57M
| $13K | ﹤0.01% |
5,800
+3,700
| +176% | +$8.77K |
|
7410
PUT
Imperial Oil
IMO
$60.8B
| $13K | ﹤0.01% |
200
-2,600
| -93% | -$159K |
|
7411
CALL
Innoviva
INVA
$1.61B
| $13K | ﹤0.01% |
900
+800
| +800% | +$12.6K |
|
|
IRS
7412
IRSA Inversiones y Representaciones
IRS
$1.3B
| $13K | ﹤0.01% |
1,505
-3,270
| -68% | -$26.2K |
|
7413
CALL
Korn Ferry
KFY
$4.26B
| $13K | ﹤0.01% |
200
-14,200
| -99% | -$857K |
|
7414
Lifestance Health
LFST
$4.29B
| $13K | ﹤0.01% |
2,238
-29,229
| -93% | -$197K |
|
7415
PUT
LXP Industrial Trust
LXP
$3.53B
| $13K | ﹤0.01% |
+300
| New | +$13.6K |
|
7416
MGP Ingredients
MGPI
$400M
| $13K | ﹤0.01% |
+160
| New | +$13.9K |
|
|
MPX
7417
DELISTED
Marine Products Corp
MPX
| $13K | ﹤0.01% |
1,181
+498
| +73% | +$5.36K |
|
7418
CALL
Neumora Therapeutics
NMRA
$311M
| $13K | ﹤0.01% |
1,000
-500
| -33% | -$8.08K |
|
7419
PUT
Nomad Foods
NOMD
$1.7B
| $13K | ﹤0.01% |
700
+100
| +17% | +$1.84K |
|
7420
PUT
Nerdy
NRDY
$110M
| $13K | ﹤0.01% |
4,600
+600
| +15% | +$1.85K |
|
|
NVEE
7421
DELISTED
NV5 Global
NVEE
| $13K | ﹤0.01% |
+540
| New | +$14K |
|
7422
CALL
OGE Energy
OGE
$10.2B
| $13K | ﹤0.01% |
400
-7,600
| -95% | -$255K |
|
|
OLP
7423
CALL
One Liberty Properties
OLP
$547M
| $13K | ﹤0.01% |
+600
| New | +$12.8K |
|
7424
Ondas Inc
ONDS
$4.48B
| $13K | ﹤0.01% |
13,967
-8,957
| -39% | -$11.8K |
|
7425
CALL
OP Bancorp
OPBK
$241M
| $13K | ﹤0.01% |
1,400
| – | – |
|
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.