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 |
Apple
AAPL
|
+$552M |
| 2 |
Strategy Inc
MSTR
|
+$85.8M |
| 3 |
MSTX
Defiance Daily Target 2x Long MSTR ETF
MSTX
|
+$48.1M |
| 4 |
Intel
INTC
|
+$45.4M |
| 5 |
Uber
UBER
|
+$43M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$133M |
| 2 |
Pinduoduo
PDD
|
+$82.6M |
| 3 |
Boeing
BA
|
+$49.8M |
| 4 |
KraneShares CSI China Internet ETF
KWEB
|
+$45.1M |
| 5 |
Microsoft
MSFT
|
+$41M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.68% |
| 2 | Consumer Discretionary | 0.23% |
| 3 | Healthcare | 0.19% |
| 4 | Financials | 0.13% |
| 5 | Communication Services | 0.11% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2801
Direxion Daily AMZN Bull 2X ETF
AMZU
$287M
| $1.04M | ﹤0.01% |
+24,827
| New | +$948K |
|
2802
PUT
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$247M
| $1.04M | ﹤0.01% |
49,200
-74,700
| -60% | -$1.81M |
|
2803
CALL
CenterPoint Energy
CNP
$29.1B
| $1.04M | ﹤0.01% |
32,800
-2,300
| -7% | -$70.8K |
|
2804
PUT
Sociedad Química y Minera de Chile
SQM
$19.6B
| $1.04M | ﹤0.01% |
28,600
+14,000
| +96% | +$548K |
|
|
SEE
2805
CALL
DELISTED
Sealed Air
SEE
| $1.04M | ﹤0.01% |
30,700
-6,100
| -17% | -$218K |
|
2806
PUT
TAL Education Group
TAL
$5.71B
| $1.04M | ﹤0.01% |
103,600
-210,700
| -67% | -$2.21M |
|
2807
Fox Class A
FOXA
$23.2B
| $1.04M | ﹤0.01% |
21,361
-12,955
| -38% | -$583K |
|
2808
CALL
NNN REIT
NNN
$9.39B
| $1.04M | ﹤0.01% |
25,400
+12,000
| +90% | +$531K |
|
2809
PUT
Sprott Junior Uranium Miners ETF
URNJ
$306M
| $1.04M | ﹤0.01% |
26,200
-51,400
| -66% | -$1.16M |
|
2810
NetEase
NTES
$76.5B
| $1.04M | ﹤0.01% |
11,619
-36,191
| -76% | -$3.17M |
|
|
ZUO
2811
CALL
DELISTED
Zuora, Inc.
ZUO
| $1.04M | ﹤0.01% |
104,500
+55,100
| +112% | +$535K |
|
2812
PUT
Uranium Energy
UEC
$4.71B
| $1.03M | ﹤0.01% |
154,800
+35,800
| +30% | +$274K |
|
2813
CALL
Weyerhaeuser
WY
$17.3B
| $1.03M | ﹤0.01% |
36,800
-35,700
| -49% | -$1.11M |
|
2814
PUT
Globalstar
GSAT
$10.2B
| $1.03M | ﹤0.01% |
33,327
+16,127
| +94% | +$399K |
|
2815
Omeros
OMER
$709M
| $1.03M | ﹤0.01% |
104,606
+86,462
| +477% | +$593K |
|
2816
CALL
Navitas Semiconductor
NVTS
$2.66B
| $1.03M | ﹤0.01% |
288,600
+249,900
| +646% | +$695K |
|
2817
Mativ Holdings
MATV
$448M
| $1.03M | ﹤0.01% |
94,270
-79,348
| -46% | -$1.11M |
|
2818
CALL
Manhattan Associates
MANH
$8.97B
| $1.03M | ﹤0.01% |
3,800
-27,100
| -88% | -$7.72M |
|
2819
PUT
Marten Transport
MRTN
$1.33B
| $1.02M | ﹤0.01% |
65,700
+48,300
| +278% | +$805K |
|
2820
PUT
Rocket Companies
RKT
$36.9B
| $1.02M | ﹤0.01% |
91,000
-182,700
| -67% | -$2.72M |
|
2821
CALL
FLEX LNG
FLNG
$1.67B
| $1.02M | ﹤0.01% |
44,600
-7,600
| -15% | -$184K |
|
|
ALTR
2822
DELISTED
Altair Engineering Inc
ALTR
| $1.02M | ﹤0.01% |
9,381
+6,889
| +276% | +$711K |
|
2823
PUT
Viridian Therapeutics
VRDN
$2.13B
| $1.02M | ﹤0.01% |
53,300
-26,200
| -33% | -$570K |
|
2824
CALL
Remitly
RELY
$4.74B
| $1.02M | ﹤0.01% |
45,200
-27,500
| -38% | -$506K |
|
|
LGF.B
2825
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $1.02M | ﹤0.01% |
121,400
+94,500
| +351% | +$662K |
|
Similar funds
Simplex Trading's Q4 2024 Portfolio in Review
As of Q4 2024, Simplex Trading held 10,008 positions worth $179B, up 4.8% from $170B the previous quarter. Its ten largest holdings account for 49% of the portfolio.
Simplex Trading's Q4 2024 filing shows 1,520 new, 3,222 increased, 3,616 reduced and 1,504 closed positions. Its largest new stake was Strategy Inc: 285,022 shares worth $82.5M. The largest sale was NVIDIA, an estimated $133M.
By sector, the portfolio is most concentrated in Technology at 0.68% of assets, up from 0.4% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q4 2024 buy was Strategy Inc: 285,022 shares worth $82.5M.
- Simplex Trading added most to Apple in Q4 2024, an estimated $552M increase.
- Simplex Trading's biggest Q4 2024 reduction was NVIDIA, cutting an estimated $133M.
- Simplex Trading fully exited Pinduoduo in Q4 2024, selling an estimated $82.6M.
- Simplex Trading's ten largest holdings make up 49% of its $179B portfolio in Q4 2024.
- Simplex Trading opened 1,520 new positions and closed 1,504 in Q4 2024.
- Simplex Trading's portfolio value rose 4.8% quarter-over-quarter to $179B.
Based on Simplex Trading's 13F filing for Q4 2024, filed 11 Feb 2025.