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 | |
|---|---|---|---|---|---|---|
1701
PUT
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $4.45M | ﹤0.01% |
72,700
-62,300
| -46% | -$3.89M |
|
1702
CALL
Pentair
PNR
$10.2B
| $4.45M | ﹤0.01% |
52,100
+44,000
| +543% | +$3.33M |
|
1703
CALL
Arthur J. Gallagher & Co
AJG
$63.7B
| $4.45M | ﹤0.01% |
17,800
-3,500
| -16% | -$841K |
|
1704
CALL
Regions Financial
RF
$26.3B
| $4.44M | ﹤0.01% |
211,100
+2,400
| +1% | +$45.4K |
|
1705
PUT
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $4.44M | ﹤0.01% |
45,000
+42,700
| +1,857% | +$4.35M |
|
1706
PUT
Banc of California
BANC
$3.28B
| $4.42M | ﹤0.01% |
290,300
-54,600
| -16% | -$759K |
|
1707
PUT
Guidewire Software
GWRE
$11.5B
| $4.41M | ﹤0.01% |
37,800
+32,900
| +671% | +$3.76M |
|
1708
CALL
Zimmer Biomet
ZBH
$17.7B
| $4.39M | ﹤0.01% |
33,300
-2,800
| -8% | -$350K |
|
1709
CALL
AngloGold Ashanti
AU
$40.3B
| $4.39M | ﹤0.01% |
197,800
-270,900
| -58% | -$5.1M |
|
1710
CALL
Ares Capital
ARCC
$13.5B
| $4.39M | ﹤0.01% |
210,900
-22,300
| -10% | -$452K |
|
1711
CALL
Shake Shack
SHAK
$2.3B
| $4.39M | ﹤0.01% |
42,200
-29,700
| -41% | -$2.6M |
|
1712
Verizon
VZ
$194B
| $4.39M | ﹤0.01% |
104,591
-63,735
| -38% | -$2.57M |
|
1713
Vistra
VST
$55.1B
| $4.38M | ﹤0.01% |
+62,959
| New | +$3.11M |
|
1714
PUT
WD-40
WDFC
$3.1B
| $4.38M | ﹤0.01% |
17,300
+400
| +2% | +$103K |
|
1715
PUT
Innovative Industrial Properties
IIPR
$1.78B
| $4.38M | ﹤0.01% |
42,300
+1,300
| +3% | +$124K |
|
|
OSG
1716
Octave Specialty Group
OSG
$252M
| $4.37M | ﹤0.01% |
279,725
-53,636
| -16% | -$846K |
|
1717
PUT
Toronto Dominion Bank
TD
$198B
| $4.36M | ﹤0.01% |
72,200
-9,000
| -11% | -$544K |
|
1718
CALL
Parsons
PSN
$6.28B
| $4.34M | ﹤0.01% |
52,300
+30,400
| +139% | +$2.22M |
|
1719
TransDigm Group
TDG
$69.2B
| $4.33M | ﹤0.01% |
3,519
+2,588
| +278% | +$2.91M |
|
1720
PUT
Schwab US Broad Market ETF
SCHB
$42.8B
| $4.33M | ﹤0.01% |
172,800
-210,000
| -55% | -$4.06M |
|
1721
CALL
Ingersoll Rand
IR
$33B
| $4.32M | ﹤0.01% |
45,500
-138,300
| -75% | -$11.8M |
|
1722
PUT
Charles River Laboratories
CRL
$10.9B
| $4.31M | ﹤0.01% |
15,900
-1,100
| -6% | -$263K |
|
1723
PUT
Establishment Labs
ESTA
$2.72B
| $4.3M | ﹤0.01% |
84,500
+22,500
| +36% | +$903K |
|
1724
CALL
Lemonade
LMND
$4.62B
| $4.28M | ﹤0.01% |
261,000
-233,200
| -47% | -$3.92M |
|
1725
Jabil
JBL
$32.8B
| $4.28M | ﹤0.01% |
31,974
+27,818
| +669% | +$3.74M |
|
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.