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 | |
|---|---|---|---|---|---|---|
951
CALL
Copart
CPRT
$25.2B
| $13.2M | 0.01% |
227,100
+15,200
| +7% | +$782K |
|
952
PUT
Johnson Controls International
JCI
$87.4B
| $13.1M | 0.01% |
201,100
+137,200
| +215% | +$7.99M |
|
953
PUT
EQT Corp
EQT
$33.4B
| $13.1M | 0.01% |
353,700
-42,600
| -11% | -$1.53M |
|
954
PUT
Nice
NICE
$5.09B
| $13.1M | 0.01% |
50,200
-16,000
| -24% | -$3.63M |
|
955
CALL
Tyson Foods
TSN
$20B
| $13.1M | 0.01% |
222,600
-39,900
| -15% | -$2.19M |
|
956
PUT
Zebra Technologies
ZBRA
$12.2B
| $13.1M | 0.01% |
43,300
-15,100
| -26% | -$4.04M |
|
957
CALL
Peabody Energy
BTU
$2.9B
| $13M | 0.01% |
537,200
-351,800
| -40% | -$8.85M |
|
958
PUT
Yum! Brands
YUM
$40.6B
| $13M | 0.01% |
93,700
-24,800
| -21% | -$3.31M |
|
959
PUT
Bath & Body Works
BBWI
$3.9B
| $13M | 0.01% |
259,600
-171,900
| -40% | -$7.72M |
|
960
ServiceNow
NOW
$95.1B
| $12.9M | 0.01% |
+84,875
| New | +$12.9M |
|
961
PUT
Arbor Realty Trust
ABR
$966M
| $12.9M | 0.01% |
974,500
+32,200
| +3% | +$432K |
|
|
FL
962
PUT
DELISTED
Foot Locker
FL
| $12.9M | 0.01% |
452,300
-35,000
| -7% | -$1.01M |
|
|
DOCU
963
PUT
DocuSign
DOCU
$8.98B
| $12.9M | 0.01% |
216,400
-459,100
| -68% | -$25.9M |
|
|
964
PUT
Copart
CPRT
$25.2B
| $12.9M | 0.01% |
222,400
+89,400
| +67% | +$4.6M |
|
965
PUT
Nextpower Inc
NXT
$15.8B
| $12.9M | 0.01% |
228,900
+201,100
| +723% | +$10.7M |
|
|
SPR
966
PUT
DELISTED
Spirit AeroSystems
SPR
| $12.9M | 0.01% |
356,800
+79,200
| +29% | +$2.4M |
|
967
CALL
Toyota
TM
$209B
| $12.8M | 0.01% |
51,000
-74,000
| -59% | -$16.4M |
|
968
Ford
F
$56.4B
| $12.8M | 0.01% |
964,622
-216,877
| -18% | -$2.63M |
|
969
PUT
VF Corp
VFC
$6.49B
| $12.8M | 0.01% |
834,800
-72,600
| -8% | -$1.17M |
|
970
PUT
Darling Ingredients
DAR
$10.1B
| $12.8M | 0.01% |
275,300
+94,900
| +53% | +$4.18M |
|
971
PUT
Atmus Filtration Technologies
ATMU
$4.34B
| $12.8M | 0.01% |
+396,900
| New | +$9.5M |
|
|
EXE
972
CALL
Expand Energy Corp
EXE
$21.9B
| $12.8M | 0.01% |
144,100
-9,700
| -6% | -$779K |
|
973
Robinhood
HOOD
$91.2B
| $12.8M | 0.01% |
635,458
-1,139,270
| -64% | -$16M |
|
974
CALL
Digital Realty Trust
DLR
$66.4B
| $12.8M | 0.01% |
88,800
-26,700
| -23% | -$3.77M |
|
975
PUT
Duke Energy
DUK
$101B
| $12.8M | 0.01% |
132,100
-13,300
| -9% | -$1.26M |
|
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.