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 | |
|---|---|---|---|---|---|---|
|
NNE
3901
Nano Nuclear Energy
NNE
$837M
| $351K | ﹤0.01% |
+14,125
| New | +$321K |
|
3902
Jacobs Solutions
J
$16.6B
| $350K | ﹤0.01% |
2,649
-420
| -14% | -$57.8K |
|
3903
Option Care Health
OPCH
$3.53B
| $350K | ﹤0.01% |
+15,120
| New | +$382K |
|
3904
Kinetik
KNTK
$3.64B
| $349K | ﹤0.01% |
+6,164
| New | +$333K |
|
3905
CALL
Progyny
PGNY
$2.41B
| $348K | ﹤0.01% |
20,200
-13,700
| -40% | -$213K |
|
3906
CALL
Crinetics Pharmaceuticals
CRNX
$8.88B
| $347K | ﹤0.01% |
6,800
| – | – |
|
3907
CALL
loanDepot
LDI
$559M
| $347K | ﹤0.01% |
170,200
+9,500
| +6% | +$21.2K |
|
3908
PUT
Pagaya Technologies
PGY
$1.38B
| $347K | ﹤0.01% |
37,400
-56,200
| -60% | -$593K |
|
3909
Telesat
TSAT
$563M
| $347K | ﹤0.01% |
+21,146
| New | +$294K |
|
3910
CALL
Crescent Energy
CRGY
$3.44B
| $346K | ﹤0.01% |
23,700
-29,600
| -56% | -$402K |
|
3911
CALL
AppFolio
APPF
$6.31B
| $345K | ﹤0.01% |
1,400
-300
| -18% | -$70.2K |
|
3912
PUT
Canadian National Railway
CNI
$78.3B
| $345K | ﹤0.01% |
3,400
-7,700
| -69% | -$842K |
|
3913
CALL
Ring Energy
REI
$287M
| $345K | ﹤0.01% |
254,400
+175,100
| +221% | +$263K |
|
3914
PUT
Krispy Kreme
DNUT
$564M
| $343K | ﹤0.01% |
34,600
+9,100
| +36% | +$98.5K |
|
3915
Ingles Markets
IMKTA
$1.71B
| $343K | ﹤0.01% |
5,338
+5,166
| +3,003% | +$348K |
|
3916
CALL
Innoviz Technologies
INVZ
$99.5M
| $343K | ﹤0.01% |
204,300
+40,200
| +24% | +$33.2K |
|
3917
PUT
NexGen Energy
NXE
$6.08B
| $343K | ﹤0.01% |
52,100
-419,100
| -89% | -$3.16M |
|
|
SFIX
3918
CALL
Stitch Fix
SFIX
$563M
| $343K | ﹤0.01% |
79,800
-7,800
| -9% | -$28.7K |
|
|
SNV
3919
PUT
DELISTED
Synovus
SNV
| $343K | ﹤0.01% |
6,700
-29,000
| -81% | -$1.5M |
|
|
ALTM
3920
DELISTED
Arcadium Lithium plc
ALTM
| $343K | ﹤0.01% |
66,953
-146,088
| -69% | -$746K |
|
|
GRAL
3921
CALL
GRAIL Inc
GRAL
$2.76B
| $342K | ﹤0.01% |
19,200
+10,600
| +123% | +$172K |
|
3922
PUT
Burford Capital
BUR
$955M
| $341K | ﹤0.01% |
26,800
-65,500
| -71% | -$879K |
|
3923
Tradr TSLA Bear Daily ETF
TSLQ
$147M
| $341K | ﹤0.01% |
4,257
+4,210
| +8,957% | +$916K |
|
|
SDIG
3924
PUT
DELISTED
Stronghold Digital Mining, Inc. Class A Common Stock
SDIG
| $341K | ﹤0.01% |
97,600
-500
| -0.5% | -$2.39K |
|
3925
CALL
Cogent Biosciences
COGT
$6.95B
| $340K | ﹤0.01% |
43,700
-600
| -1% | -$5.98K |
|
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.