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 | |
|---|---|---|---|---|---|---|
4901
PUT
Vital Farms
VITL
$586M
| $135K | ﹤0.01% |
3,600
-5,700
| -61% | -$203K |
|
4902
CALL
Workhorse Group
WKHS
$33.4M
| $135K | ﹤0.01% |
1,290
+497
| +63% | +$67.9K |
|
|
AIOT
4903
PUT
PowerFleet Inc
AIOT
$537M
| $135K | ﹤0.01% |
20,300
-25,300
| -55% | -$152K |
|
4904
PUT
InfraCap MLP ETF
AMZA
$466M
| $134K | ﹤0.01% |
5,600
+3,300
| +143% | +$140K |
|
4905
CALL
AerSale
ASLE
$291M
| $134K | ﹤0.01% |
21,400
+7,900
| +59% | +$45.3K |
|
4906
PUT
INmune Bio
INMB
$44.9M
| $134K | ﹤0.01% |
28,700
+19,600
| +215% | +$102K |
|
|
SVM
4907
Silvercorp Metals
SVM
$2.02B
| $134K | ﹤0.01% |
44,734
+24,089
| +117% | +$95K |
|
|
PDCO
4908
DELISTED
Patterson Companies, Inc.
PDCO
| $134K | ﹤0.01% |
+4,363
| New | +$101K |
|
|
PSTX
4909
DELISTED
Poseida Therapeutics, Inc. Common Stock
PSTX
| $134K | ﹤0.01% |
+14,032
| New | +$73.2K |
|
4910
PUT
Ameren
AEE
$30.4B
| $133K | ﹤0.01% |
1,500
-79,400
| -98% | -$7.11M |
|
4911
PUT
Ardmore Shipping
ASC
$683M
| $133K | ﹤0.01% |
11,000
-13,600
| -55% | -$185K |
|
4912
CALL
Cognyte Software
CGNT
$655M
| $133K | ﹤0.01% |
15,400
+9,600
| +166% | +$72.5K |
|
4913
Torrid Holdings
CURV
$274M
| $133K | ﹤0.01% |
25,469
+16,672
| +190% | +$67.1K |
|
4914
PUT
Hess Midstream
HESM
$5.19B
| $133K | ﹤0.01% |
3,600
-3,200
| -47% | -$115K |
|
4915
PUT
Heritage Insurance Holdings
HRTG
$903M
| $133K | ﹤0.01% |
11,000
+9,500
| +633% | +$110K |
|
4916
i3 Verticals
IIIV
$419M
| $133K | ﹤0.01% |
+5,794
| New | +$136K |
|
4917
PUT
Immersion
IMMR
$243M
| $133K | ﹤0.01% |
15,300
-319,300
| -95% | -$2.79M |
|
4918
CALL
State Street Multi-Asset Real Return ETF
RLY
$1.26B
| $133K | ﹤0.01% |
3,200
| – | – |
|
4919
PUT
SandRidge Energy
SD
$503M
| $133K | ﹤0.01% |
18,600
+9,200
| +98% | +$106K |
|
4920
Sensata Technologies
ST
$6.69B
| $133K | ﹤0.01% |
+4,885
| New | +$159K |
|
4921
CALL
VSE Corp
VSEC
$5.19B
| $133K | ﹤0.01% |
1,400
+1,100
| +367% | +$116K |
|
|
EFC
4922
CALL
Ellington Financial
EFC
$1.69B
| $132K | ﹤0.01% |
10,900
+7,000
| +179% | +$86.5K |
|
4923
CALL
Kymera Therapeutics
KYMR
$8.66B
| $132K | ﹤0.01% |
3,300
| – | – |
|
4924
PUT
Medifast
MED
$107M
| $132K | ﹤0.01% |
7,500
-5,100
| -40% | -$94.6K |
|
4925
CALL
Pebblebrook Hotel Trust
PEB
$2.18B
| $131K | ﹤0.01% |
9,700
+8,800
| +978% | +$116K |
|
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.