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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2826
PUT
Open Text
OTEX
$5.43B
| $1.12M | ﹤0.01% |
33,700
+6,500
| +24% | +$205K |
|
2827
PUT
Leonardo DRS
DRS
$12.8B
| $1.12M | ﹤0.01% |
39,700
-31,100
| -44% | -$854K |
|
2828
CALL
Recursion Pharmaceuticals
RXRX
$1.57B
| $1.12M | ﹤0.01% |
169,900
-91,900
| -35% | -$659K |
|
2829
CALL
CNX Resources
CNX
$4.85B
| $1.12M | ﹤0.01% |
34,300
-27,700
| -45% | -$746K |
|
2830
CALL
Delek US
DK
$3.87B
| $1.12M | ﹤0.01% |
59,600
+20,100
| +51% | +$425K |
|
|
JKS
2831
JinkoSolar
JKS
$775M
| $1.12M | ﹤0.01% |
+41,616
| New | +$838K |
|
|
TEM
2832
CALL
Tempus AI
TEM
$7.69B
| $1.11M | ﹤0.01% |
19,700
+12,700
| +181% | +$594K |
|
2833
CALL
HF Sinclair
DINO
$15.9B
| $1.11M | ﹤0.01% |
25,000
-2,400
| -9% | -$115K |
|
2834
CALL
MGIC Investment
MTG
$6.27B
| $1.11M | ﹤0.01% |
43,500
-16,600
| -28% | -$400K |
|
2835
PUT
Walker & Dunlop
WD
$1.65B
| $1.11M | ﹤0.01% |
9,800
+6,900
| +238% | +$722K |
|
2836
PUT
Melco Resorts & Entertainment
MLCO
$2.1B
| $1.11M | ﹤0.01% |
142,400
-17,400
| -11% | -$103K |
|
2837
PUT
Bioventus
BVS
$799M
| $1.11M | ﹤0.01% |
92,800
+7,300
| +9% | +$63.1K |
|
|
HPP
2838
CALL
Hudson Pacific Properties
HPP
$834M
| $1.11M | ﹤0.01% |
33,129
+32,000
| +2,834% | +$1.15M |
|
|
JKS
2839
CALL
JinkoSolar
JKS
$775M
| $1.11M | ﹤0.01% |
41,300
+5,100
| +14% | +$103K |
|
|
LAC
2840
PUT
Lithium Americas
LAC
$986M
| $1.11M | ﹤0.01% |
298,900
+153,500
| +106% | +$390K |
|
2841
CALL
Methanex
MEOH
$4.32B
| $1.11M | ﹤0.01% |
26,800
+22,600
| +538% | +$1.01M |
|
2842
CALL
Entergy
ETR
$54.1B
| $1.1M | ﹤0.01% |
16,800
-200
| -1% | -$11.8K |
|
2843
CALL
Philips
PHG
$25.4B
| $1.1M | ﹤0.01% |
36,538
-13,945
| -28% | -$371K |
|
2844
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $1.1M | ﹤0.01% |
71,700
+22,900
| +47% | +$382K |
|
2845
CALL
Guardant Health
GH
$19.5B
| $1.1M | ﹤0.01% |
48,000
-11,700
| -20% | -$331K |
|
2846
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $1.1M | ﹤0.01% |
22,700
-16,900
| -43% | -$485K |
|
2847
Antero Resources
AR
$10.9B
| $1.1M | ﹤0.01% |
38,350
+29,150
| +317% | +$826K |
|
2848
Nokia
NOK
$50.8B
| $1.1M | ﹤0.01% |
251,279
-91,769
| -27% | -$371K |
|
2849
LegalZoom.com
LZ
$1.23B
| $1.1M | ﹤0.01% |
172,910
+141,735
| +455% | +$928K |
|
2850
Denison Mines
DNN
$2.63B
| $1.1M | ﹤0.01% |
599,272
+215,360
| +56% | +$378K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.