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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
LGF.B
1951
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $2.01M | ﹤0.01% |
189,500
-34,300
| -15% | -$292K |
|
1952
CALL
DHT Holdings
DHT
$2.97B
| $2M | ﹤0.01% |
185,200
+73,200
| +65% | +$736K |
|
1953
CALL
Ecolab
ECL
$75.6B
| $2M | ﹤0.01% |
12,100
-8,100
| -40% | -$1.26M |
|
|
FRG
1954
CALL
DELISTED
Franchise Group, Inc.
FRG
| $2M | ﹤0.01% |
73,500
+43,100
| +142% | +$1.24M |
|
1955
CALL
Newell Brands
NWL
$2.16B
| $2M | ﹤0.01% |
160,900
+124,400
| +341% | +$1.75M |
|
1956
RH
RH
$3.3B
| $2M | ﹤0.01% |
+8,208
| New | +$2.38M |
|
1957
CALL
Shake Shack
SHAK
$2.3B
| $2M | ﹤0.01% |
36,000
-151,300
| -81% | -$8.35M |
|
1958
CALL
Alight
ALIT
$497M
| $1.99M | ﹤0.01% |
10,815
+7,560
| +232% | +$1.39M |
|
1959
CALL
Group 1 Automotive
GPI
$3.94B
| $1.99M | ﹤0.01% |
8,800
-2,800
| -24% | -$594K |
|
1960
MetLife
MET
$61B
| $1.99M | ﹤0.01% |
+34,388
| New | +$2.32M |
|
|
CNR
1961
PUT
Core Natural Resources Inc
CNR
$4.19B
| $1.99M | ﹤0.01% |
34,100
-38,300
| -53% | -$2.18M |
|
1962
PUT
Lattice Semiconductor
LSCC
$17.6B
| $1.99M | ﹤0.01% |
20,800
+10,800
| +108% | +$889K |
|
1963
Warner Bros
WBD
$64.6B
| $1.98M | ﹤0.01% |
131,220
-1,151,384
| -90% | -$16.4M |
|
|
SMAR
1964
CALL
DELISTED
Smartsheet Inc.
SMAR
| $1.98M | ﹤0.01% |
41,400
-10,600
| -20% | -$461K |
|
1965
PUT
Green Plains
GPRE
$1.19B
| $1.97M | ﹤0.01% |
63,600
+9,800
| +18% | +$320K |
|
|
VSXY
1966
CALL
Victoria's Secret
VSXY
$6.64B
| $1.96M | ﹤0.01% |
57,400
-78,500
| -58% | -$2.91M |
|
1967
PUT
Aurinia Pharmaceuticals
AUPH
$1.97B
| $1.96M | ﹤0.01% |
178,800
+106,500
| +147% | +$938K |
|
1968
CALL
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $1.95M | ﹤0.01% |
34,800
-5,500
| -14% | -$162K |
|
|
SQSP
1969
CALL
DELISTED
Squarespace, Inc.
SQSP
| $1.95M | ﹤0.01% |
61,300
+22,100
| +56% | +$547K |
|
1970
AdvisorShares Pure US Cannabis ETF
MSOS
$864M
| $1.95M | ﹤0.01% |
342,013
+187,640
| +122% | +$1.24M |
|
1971
PUT
Iridium Communications
IRDM
$4.85B
| $1.94M | ﹤0.01% |
31,400
+24,900
| +383% | +$1.49M |
|
1972
CALL
BioNTech
BNTX
$22.6B
| $1.94M | ﹤0.01% |
15,600
-44,700
| -74% | -$6.14M |
|
|
CGC
1973
CALL
Canopy Growth
CGC
$375M
| $1.94M | ﹤0.01% |
111,010
-30,690
| -22% | -$728K |
|
1974
CALL
Repligen
RGEN
$7.44B
| $1.94M | ﹤0.01% |
11,500
-25,500
| -69% | -$4.55M |
|
|
IRBT
1975
CALL
DELISTED
iRobot
IRBT
| $1.93M | ﹤0.01% |
44,300
+27,100
| +158% | +$1.2M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.