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 | |
|---|---|---|---|---|---|---|
5776
CALL
Ambev
ABEV
$48.1B
| $82K | ﹤0.01% |
33,300
-47,000
| -59% | -$122K |
|
|
BCYC
5777
CALL
Bicycle Therapeutics
BCYC
$269M
| $82K | ﹤0.01% |
3,300
-9,700
| -75% | -$206K |
|
|
BRSP
5778
CALL
BrightSpire Capital
BRSP
$634M
| $82K | ﹤0.01% |
12,000
+3,700
| +45% | +$25.9K |
|
5779
CALL
Byrna Technologies
BYRN
$103M
| $82K | ﹤0.01% |
5,900
+3,100
| +111% | +$30K |
|
5780
CALL
Deluxe
DLX
$1.18B
| $82K | ﹤0.01% |
4,000
-1,100
| -22% | -$21.9K |
|
5781
CALL
Epsilon Energy
EPSN
$169M
| $82K | ﹤0.01% |
15,100
-15,400
| -50% | -$76.6K |
|
5782
PUT
Greif
GEF
$4.92B
| $82K | ﹤0.01% |
1,200
+100
| +9% | +$6.38K |
|
5783
PUT
GrowGeneration
GRWG
$86.5M
| $82K | ﹤0.01% |
28,900
+27,200
| +1,600% | +$62.7K |
|
5784
Idacorp
IDA
$8.27B
| $82K | ﹤0.01% |
+892
| New | +$81.7K |
|
5785
PUT
Liberty Energy
LBRT
$3.05B
| $82K | ﹤0.01% |
4,000
-2,900
| -42% | -$57.4K |
|
|
NEXN
5786
PUT
Nexxen International
NEXN
$573M
| $82K | ﹤0.01% |
15,900
+9,300
| +141% | +$46.8K |
|
5787
PUT
NET Power
NPWR
$126M
| $82K | ﹤0.01% |
+7,200
| New | +$65.2K |
|
|
TPIC
5788
DELISTED
TPI Composites
TPIC
| $82K | ﹤0.01% |
28,244
+14,157
| +100% | +$41.7K |
|
5789
CALL
ALX Oncology
ALXO
$261M
| $81K | ﹤0.01% |
7,300
+300
| +4% | +$4.21K |
|
5790
PUT
Blackbaud
BLKB
$1.94B
| $81K | ﹤0.01% |
+1,100
| New | +$84K |
|
|
EVRI
5791
CALL
DELISTED
Everi Holdings
EVRI
| $81K | ﹤0.01% |
8,100
+5,500
| +212% | +$56.9K |
|
|
ONL
5792
PUT
Orion Office REIT
ONL
$150M
| $81K | ﹤0.01% |
23,100
+22,900
| +11,450% | +$103K |
|
5793
CALL
Oric Pharmaceuticals
ORIC
$1.15B
| $81K | ﹤0.01% |
5,900
+5,300
| +883% | +$62.9K |
|
5794
PUT
Vaxcyte
PCVX
$7.81B
| $81K | ﹤0.01% |
1,200
+1,100
| +1,100% | +$76.2K |
|
5795
RxSight
RXST
$249M
| $81K | ﹤0.01% |
1,582
-4,503
| -74% | -$221K |
|
5796
Scholastic
SCHL
$767M
| $81K | ﹤0.01% |
+2,162
| New | +$82.9K |
|
5797
CALL
Scilex Holding
SCLX
$46.9M
| $81K | ﹤0.01% |
+1,471
| New | +$85.7K |
|
5798
CALL
Similarweb
SMWB
$628M
| $81K | ﹤0.01% |
+9,100
| New | +$67.3K |
|
|
STKL
5799
DELISTED
SunOpta
STKL
| $81K | ﹤0.01% |
11,895
-29,764
| -71% | -$184K |
|
5800
PUT
Sypris Solutions
SYPR
$42.8M
| $81K | ﹤0.01% |
51,300
-2,700
| -5% | -$5.2K |
|
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.