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 | |
|---|---|---|---|---|---|---|
7601
PUT
loanDepot
LDI
$541M
| $10K | ﹤0.01% |
4,200
+200
| +5% | +$537 |
|
7602
Marcus Corp
MCS
$752M
| $10K | ﹤0.01% |
732
+356
| +95% | +$5.03K |
|
|
MRCC
7603
CALL
DELISTED
Monroe Capital Corp
MRCC
| $10K | ﹤0.01% |
1,400
-7,100
| -84% | -$51.5K |
|
7604
CALL
NET Power
NPWR
$128M
| $10K | ﹤0.01% |
900
+700
| +350% | +$6.33K |
|
7605
PUT
NetSol Technologies
NTWK
$51.1M
| $10K | ﹤0.01% |
+3,700
| New | +$9.45K |
|
7606
PUT
Envista
NVST
$4.34B
| $10K | ﹤0.01% |
500
-100
| -17% | -$2.27K |
|
7607
PUT
Orthofix Medical
OFIX
$481M
| $10K | ﹤0.01% |
+700
| New | +$9.68K |
|
7608
CALL
Ovid Therapeutics
OVID
$439M
| $10K | ﹤0.01% |
3,500
+3,000
| +600% | +$10K |
|
7609
PUT
Phillips Edison & Co
PECO
$5.46B
| $10K | ﹤0.01% |
300
| – | – |
|
7610
PUT
Provident Financial Services
PFS
$3.11B
| $10K | ﹤0.01% |
700
-600
| -46% | -$9.54K |
|
|
PVBC
7611
DELISTED
Provident Bancorp
PVBC
| $10K | ﹤0.01% |
1,111
+652
| +142% | +$6.54K |
|
7612
CALL
Pixelworks
PXLW
$37.9M
| $10K | ﹤0.01% |
325
-75
| -19% | -$1.99K |
|
|
SEE
7613
DELISTED
Sealed Air
SEE
| $10K | ﹤0.01% |
+274
| New | +$9.82K |
|
|
SIFY
7614
PUT
Sify Technologies
SIFY
$1.05B
| $10K | ﹤0.01% |
1,433
+1,316
| +1,125% | +$11.2K |
|
7615
CALL
Selective Insurance
SIGI
$5.53B
| $10K | ﹤0.01% |
100
-4,400
| -98% | -$453K |
|
7616
PUT
SmartRent
SMRT
$186M
| $10K | ﹤0.01% |
+4,000
| New | +$11.6K |
|
|
SNCY
7617
PUT
DELISTED
Sun Country Airlines
SNCY
| $10K | ﹤0.01% |
700
-163,100
| -100% | -$2.35M |
|
7618
PUT
1st Source
SRCE
$2.09B
| $10K | ﹤0.01% |
200
| – | – |
|
7619
CALL
Neuronetics
STIM
$126M
| $10K | ﹤0.01% |
+2,200
| New | +$7.73K |
|
7620
ThredUp
TDUP
$756M
| $10K | ﹤0.01% |
5,103
+1,539
| +43% | +$3.14K |
|
7621
CALL
Tompkins Financial
TMP
$1.43B
| $10K | ﹤0.01% |
+200
| New | +$10.1K |
|
|
TSE
7622
PUT
DELISTED
Trinseo
TSE
| $10K | ﹤0.01% |
2,900
+900
| +45% | +$4.8K |
|
7623
CALL
VOC Energy
VOC
$57M
| $10K | ﹤0.01% |
1,800
-4,400
| -71% | -$29.6K |
|
7624
PUT
Vera Bradley
VRA
$106M
| $10K | ﹤0.01% |
1,500
+1,200
| +400% | +$8.8K |
|
7625
Vuzix
VUZI
$193M
| $10K | ﹤0.01% |
8,472
-42,469
| -83% | -$69.3K |
|
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.