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 | |
|---|---|---|---|---|---|---|
1601
e.l.f. Beauty
ELF
$4.56B
| $5.02M | ﹤0.01% |
25,622
+14,334
| +127% | +$2.55M |
|
1602
PUT
Yum China
YUMC
$14.9B
| $5.02M | ﹤0.01% |
126,200
+62,100
| +97% | +$2.45M |
|
1603
PUT
Papa John's
PZZA
$999M
| $5.01M | ﹤0.01% |
75,200
+13,800
| +22% | +$996K |
|
1604
Zions Bancorporation
ZION
$10.1B
| $5M | ﹤0.01% |
115,128
+1,039
| +0.9% | +$42.9K |
|
1605
CALL
Lantheus
LNTH
$6.82B
| $4.99M | ﹤0.01% |
80,100
-120,100
| -60% | -$7.07M |
|
1606
PUT
Sensata Technologies
ST
$6.65B
| $4.99M | ﹤0.01% |
135,700
-17,900
| -12% | -$627K |
|
1607
PUT
AMC Entertainment Holdings
AMC
$2.03B
| $4.98M | ﹤0.01% |
1,339,000
-191,100
| -12% | -$851K |
|
1608
CALL
Axsome Therapeutics
AXSM
$12.4B
| $4.98M | ﹤0.01% |
62,400
+25,200
| +68% | +$2.12M |
|
1609
CALL
Perrigo
PRGO
$1.4B
| $4.98M | ﹤0.01% |
154,600
+84,900
| +122% | +$2.68M |
|
|
SRG
1610
CALL
Seritage Growth Properties
SRG
$130M
| $4.97M | ﹤0.01% |
515,600
+200,500
| +64% | +$1.88M |
|
1611
CALL
Bath & Body Works
BBWI
$4.01B
| $4.96M | ﹤0.01% |
99,200
-156,500
| -61% | -$7.03M |
|
1612
Pan American Silver
PAAS
$18.6B
| $4.95M | ﹤0.01% |
328,153
+98,588
| +43% | +$1.36M |
|
1613
Twilio
TWLO
$29.1B
| $4.95M | ﹤0.01% |
80,914
-30,063
| -27% | -$1.98M |
|
1614
CALL
ScottsMiracle-Gro
SMG
$4.03B
| $4.95M | ﹤0.01% |
66,300
+37,000
| +126% | +$2.3M |
|
1615
CALL
Public Service Enterprise Group
PEG
$39.8B
| $4.94M | ﹤0.01% |
74,000
-32,900
| -31% | -$2.01M |
|
1616
PUT
Roper Technologies
ROP
$36.3B
| $4.93M | ﹤0.01% |
8,800
| – | – |
|
1617
Deere & Co
DE
$170B
| $4.93M | ﹤0.01% |
+11,994
| New | +$4.6M |
|
1618
CALL
Watsco Inc
WSO
$14.9B
| $4.92M | ﹤0.01% |
11,400
+2,700
| +31% | +$1.08M |
|
1619
CALL
Caleres
CAL
$396M
| $4.92M | ﹤0.01% |
120,000
+35,300
| +42% | +$1.23M |
|
1620
CALL
iShares Convertible Bond ETF
ICVT
$7.23B
| $4.92M | ﹤0.01% |
156,800
+76,000
| +94% | +$5.93M |
|
1621
CALL
Pool Corp
POOL
$6.7B
| $4.92M | ﹤0.01% |
12,200
+2,500
| +26% | +$977K |
|
1622
Halliburton
HAL
$27.9B
| $4.92M | ﹤0.01% |
124,734
-75,012
| -38% | -$2.69M |
|
1623
PUT
HDFC Bank
HDB
$119B
| $4.9M | ﹤0.01% |
175,200
+138,400
| +376% | +$3.92M |
|
1624
CALL
dLocal
DLO
$4.26B
| $4.88M | ﹤0.01% |
332,200
+103,100
| +45% | +$1.72M |
|
1625
CALL
Louisiana-Pacific
LPX
$5.2B
| $4.88M | ﹤0.01% |
58,100
+19,000
| +49% | +$1.37M |
|
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.