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 | |
|---|---|---|---|---|---|---|
2651
PUT
PubMatic
PUBM
$581M
| $1.56M | ﹤0.01% |
66,000
+36,500
| +124% | +$654K |
|
2652
CALL
ANI Pharmaceuticals
ANIP
$1.77B
| $1.56M | ﹤0.01% |
22,600
+21,200
| +1,514% | +$1.28M |
|
|
BAND
2653
CALL
Bandwidth Inc
BAND
$1.91B
| $1.56M | ﹤0.01% |
85,500
+75,600
| +764% | +$1.19M |
|
2654
CALL
Ollie's Bargain Outlet
OLLI
$4.01B
| $1.56M | ﹤0.01% |
19,600
-16,100
| -45% | -$1.22M |
|
2655
CALL
Blue Owl Capital
OWL
$6.39B
| $1.56M | ﹤0.01% |
82,600
+23,400
| +40% | +$392K |
|
2656
Roper Technologies
ROP
$36.3B
| $1.56M | ﹤0.01% |
2,776
-1,751
| -39% | -$955K |
|
2657
CALL
Comstock Resources
CRK
$3.97B
| $1.55M | ﹤0.01% |
167,500
+59,700
| +55% | +$491K |
|
2658
PUT
BJ's Restaurants
BJRI
$1.41B
| $1.55M | ﹤0.01% |
42,900
+21,600
| +101% | +$751K |
|
|
ESPR
2659
CALL
DELISTED
Esperion Therapeutics
ESPR
| $1.55M | ﹤0.01% |
578,800
+69,500
| +14% | +$169K |
|
|
JMIA
2660
CALL
Jumia Technologies
JMIA
$726M
| $1.55M | ﹤0.01% |
302,900
+238,800
| +373% | +$1.07M |
|
2661
CALL
Beam Therapeutics
BEAM
$2.58B
| $1.55M | ﹤0.01% |
46,900
+22,200
| +90% | +$692K |
|
2662
PUT
Immatics
IMTX
$1.24B
| $1.55M | ﹤0.01% |
147,300
+62,000
| +73% | +$723K |
|
2663
MongoDB
MDB
$24B
| $1.55M | ﹤0.01% |
4,318
-35,929
| -89% | -$14.7M |
|
2664
CALL
MakeMyTrip
MMYT
$4.67B
| $1.55M | ﹤0.01% |
21,800
+6,300
| +41% | +$358K |
|
2665
CALL
Cooper-Standard Automotive
CPS
$504M
| $1.55M | ﹤0.01% |
93,400
-35,600
| -28% | -$571K |
|
2666
Matador Resources
MTDR
$6.31B
| $1.55M | ﹤0.01% |
23,155
-5,037
| -18% | -$299K |
|
|
LUCK
2667
PUT
Lucky Strike Entertainment
LUCK
$938M
| $1.55M | ﹤0.01% |
112,900
+95,600
| +553% | +$1.23M |
|
2668
CALL
QuinStreet
QNST
$870M
| $1.54M | ﹤0.01% |
+87,400
| New | +$1.24M |
|
2669
BioMarin Pharmaceuticals
BMRN
$11.5B
| $1.54M | ﹤0.01% |
17,638
-10,865
| -38% | -$973K |
|
2670
CALL
United Natural Foods
UNFI
$3.01B
| $1.54M | ﹤0.01% |
134,000
+10,800
| +9% | +$157K |
|
2671
PUT
Omega Healthcare
OHI
$15.4B
| $1.53M | ﹤0.01% |
48,500
-17,300
| -26% | -$526K |
|
2672
CALL
Wendy's
WEN
$1.33B
| $1.53M | ﹤0.01% |
81,400
-3,300
| -4% | -$62K |
|
2673
CALL
Ero Copper
ERO
$2.71B
| $1.53M | ﹤0.01% |
79,500
+42,600
| +115% | +$703K |
|
2674
CALL
Nokia
NOK
$50.8B
| $1.53M | ﹤0.01% |
432,500
-364,000
| -46% | -$1.29M |
|
|
HAPN
2675
CALL
Happen Inc
HAPN
$2.08B
| $1.53M | ﹤0.01% |
173,700
-140,700
| -45% | -$1.18M |
|
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.