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 | |
|---|---|---|---|---|---|---|
2751
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $1.43M | ﹤0.01% |
12,700
-7,800
| -38% | -$834K |
|
2752
Vanguard Real Estate ETF
VNQ
$39.9B
| $1.43M | ﹤0.01% |
+16,522
| New | +$1.41M |
|
2753
PUT
LCI Industries
LCII
$2.51B
| $1.43M | ﹤0.01% |
11,600
+9,900
| +582% | +$1.16M |
|
2754
PUT
Invesco CurrencyShares Australian Dollar Trust
FXA
$96.8M
| $1.43M | ﹤0.01% |
22,100
+16,900
| +325% | +$1.1M |
|
2755
PUT
MSC Industrial Direct
MSM
$7.02B
| $1.43M | ﹤0.01% |
14,700
+13,900
| +1,738% | +$1.36M |
|
|
SRCL
2756
CALL
DELISTED
Stericycle Inc
SRCL
| $1.42M | ﹤0.01% |
27,000
+19,300
| +251% | +$971K |
|
2757
PUT
Yelp
YELP
$1.38B
| $1.42M | ﹤0.01% |
36,100
-136,100
| -79% | -$5.64M |
|
2758
PUT
Bio-Rad Laboratories Class A
BIO
$8.42B
| $1.42M | ﹤0.01% |
4,100
+3,100
| +310% | +$1.02M |
|
2759
CALL
Cal-Maine
CALM
$4.28B
| $1.42M | ﹤0.01% |
24,100
-28,600
| -54% | -$1.63M |
|
2760
PUT
Immunovant
IMVT
$8.09B
| $1.42M | ﹤0.01% |
43,900
-81,600
| -65% | -$2.98M |
|
2761
CALL
Box
BOX
$4.02B
| $1.42M | ﹤0.01% |
50,000
+6,400
| +15% | +$172K |
|
2762
Invesco CurrencyShares Swiss Franc Trust
FXF
$409M
| $1.42M | ﹤0.01% |
+14,350
| New | +$1.46M |
|
2763
Radian Group
RDN
$5.14B
| $1.41M | ﹤0.01% |
+42,245
| New | +$1.24M |
|
2764
Dyne Therapeutics
DYN
$4.04B
| $1.41M | ﹤0.01% |
49,706
+31,645
| +175% | +$716K |
|
2765
PUT
Jack in the Box
JACK
$278M
| $1.41M | ﹤0.01% |
20,600
-6,200
| -23% | -$467K |
|
2766
CALL
Sally Beauty Holdings
SBH
$1.4B
| $1.41M | ﹤0.01% |
113,600
+97,900
| +624% | +$1.23M |
|
2767
CALL
Bentley Systems
BSY
$9.54B
| $1.41M | ﹤0.01% |
27,000
+13,600
| +101% | +$684K |
|
2768
PUT
Penske Automotive Group
PAG
$14.3B
| $1.41M | ﹤0.01% |
8,700
-10,100
| -54% | -$1.54M |
|
2769
PUT
Workiva
WK
$2.94B
| $1.41M | ﹤0.01% |
16,600
-5,800
| -26% | -$522K |
|
2770
PUT
Equinor
EQNR
$95.9B
| $1.41M | ﹤0.01% |
52,000
+10,200
| +24% | +$279K |
|
2771
CALL
SM Energy
SM
$7.96B
| $1.41M | ﹤0.01% |
28,200
-34,200
| -55% | -$1.4M |
|
2772
Guardant Health
GH
$19.5B
| $1.4M | ﹤0.01% |
67,947
+42,756
| +170% | +$917K |
|
2773
PUT
ITT
ITT
$17.5B
| $1.4M | ﹤0.01% |
10,300
+7,400
| +255% | +$918K |
|
2774
RenaissanceRe
RNR
$13.7B
| $1.4M | ﹤0.01% |
5,955
+2,126
| +56% | +$472K |
|
2775
CALL
Blackstone Secured Lending
BXSL
$5.41B
| $1.4M | ﹤0.01% |
44,900
+12,800
| +40% | +$375K |
|
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.