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 | |
|---|---|---|---|---|---|---|
|
TBCH
3301
Turtle Beach Corp
TBCH
$245M
| $839K | ﹤0.01% |
48,710
+31,061
| +176% | +$375K |
|
3302
CALL
Credo Technology Group
CRDO
$38.8B
| $837K | ﹤0.01% |
39,500
+17,900
| +83% | +$375K |
|
3303
PUT
Crescent Energy
CRGY
$3.46B
| $837K | ﹤0.01% |
70,400
+44,400
| +171% | +$500K |
|
|
GOGL
3304
CALL
DELISTED
Golden Ocean Group
GOGL
| $837K | ﹤0.01% |
64,600
+17,600
| +37% | +$202K |
|
|
ALPN
3305
DELISTED
Alpine Immune Sciences Inc
ALPN
| $837K | ﹤0.01% |
+21,123
| New | +$623K |
|
3306
PUT
Euronet Worldwide
EEFT
$3.01B
| $835K | ﹤0.01% |
7,600
+5,800
| +322% | +$608K |
|
3307
Vanguard Mega Cap Growth ETF
MGK
$31.8B
| $834K | ﹤0.01% |
14,555
+445
| +3% | +$24.6K |
|
|
MRNS
3308
DELISTED
Marinus Pharmaceuticals, Inc
MRNS
| $834K | ﹤0.01% |
+92,271
| New | +$897K |
|
3309
PUT
TechnipFMC
FTI
$29.9B
| $833K | ﹤0.01% |
33,200
-111,900
| -77% | -$2.35M |
|
3310
KE Holdings
BEKE
$17.4B
| $832K | ﹤0.01% |
60,626
-98,541
| -62% | -$1.38M |
|
3311
CALL
Webster Financial
WBS
$12.5B
| $832K | ﹤0.01% |
16,400
+14,200
| +645% | +$694K |
|
3312
PUT
Westrock Coffee
WEST
$769M
| $832K | ﹤0.01% |
80,600
-87,200
| -52% | -$880K |
|
3313
CALL
WEX
WEX
$6.07B
| $831K | ﹤0.01% |
3,500
-7,100
| -67% | -$1.53M |
|
|
SP
3314
CALL
DELISTED
SP Plus Corporation
SP
| $830K | ﹤0.01% |
15,900
+1,100
| +7% | +$56.7K |
|
|
SII
3315
Sprott
SII
$2.7B
| $828K | ﹤0.01% |
22,419
-3,904
| -15% | -$140K |
|
3316
PUT
Trex
TREX
$4.57B
| $827K | ﹤0.01% |
8,300
-2,700
| -25% | -$240K |
|
|
JKS
3317
PUT
JinkoSolar
JKS
$799M
| $826K | ﹤0.01% |
32,800
-43,200
| -57% | -$1.19M |
|
|
JNPR
3318
CALL
DELISTED
Juniper Networks
JNPR
| $826K | ﹤0.01% |
22,300
-101,900
| -82% | -$3.72M |
|
3319
Mativ Holdings
MATV
$455M
| $826K | ﹤0.01% |
44,094
-64,033
| -59% | -$956K |
|
3320
CALL
Outfront Media
OUT
$5.68B
| $826K | ﹤0.01% |
49,986
+40,029
| +402% | +$564K |
|
3321
CALL
Agree Realty
ADC
$9.66B
| $822K | ﹤0.01% |
14,400
+6,800
| +89% | +$398K |
|
3322
CALL
RenaissanceRe
RNR
$13.7B
| $822K | ﹤0.01% |
3,500
-21,100
| -86% | -$4.68M |
|
|
MASI
3323
DELISTED
Masimo
MASI
| $821K | ﹤0.01% |
5,595
-9,051
| -62% | -$1.17M |
|
3324
PUT
Return Stacked Bonds & Managed Futures ETF
RSBT
$138M
| $821K | ﹤0.01% |
50,600
+42,400
| +517% | +$729K |
|
|
BCPC
3325
CALL
Balchem Corp
BCPC
$5.29B
| $821K | ﹤0.01% |
5,300
-19,000
| -78% | -$2.82M |
|
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.