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 | |
|---|---|---|---|---|---|---|
3726
PUT
Skywest
SKYW
$4.49B
| $420K | ﹤0.01% |
4,200
-31,000
| -88% | -$3.17M |
|
3727
PUT
Helmerich & Payne
HP
$3.33B
| $419K | ﹤0.01% |
13,100
+11,200
| +589% | +$380K |
|
3728
CALL
Yext
YEXT
$573M
| $419K | ﹤0.01% |
65,900
-8,900
| -12% | -$64.7K |
|
3729
PUT
Amcor
AMCR
$21.5B
| $418K | ﹤0.01% |
8,900
-740
| -8% | -$38.7K |
|
3730
BridgeBio Pharma
BBIO
$16.5B
| $418K | ﹤0.01% |
15,256
-17,243
| -53% | -$446K |
|
3731
PUT
RBC Bearings
RBC
$18.1B
| $418K | ﹤0.01% |
1,400
| – | – |
|
3732
Sun Communities
SUI
$15.6B
| $417K | ﹤0.01% |
+3,394
| New | +$434K |
|
3733
American Financial Group
AFG
$12.2B
| $416K | ﹤0.01% |
+3,040
| New | +$418K |
|
3734
PUT
Itaú Unibanco
ITUB
$92.1B
| $416K | ﹤0.01% |
95,172
+59,256
| +165% | +$305K |
|
3735
PUT
Alcon
ALC
$33.7B
| $415K | ﹤0.01% |
4,900
-300
| -6% | -$27.1K |
|
3736
CALL
Life Time Group Holdings
LTH
$9.94B
| $415K | ﹤0.01% |
18,800
-9,200
| -33% | -$220K |
|
|
SMLR
3737
CALL
DELISTED
Semler Scientific
SMLR
| $415K | ﹤0.01% |
+7,700
| New | +$354K |
|
|
HAPN
3738
PUT
Happen Inc
HAPN
$2.14B
| $414K | ﹤0.01% |
25,600
+4,700
| +22% | +$69.3K |
|
3739
CALL
Simpson Manufacturing
SSD
$8.45B
| $414K | ﹤0.01% |
2,500
+2,300
| +1,150% | +$421K |
|
3740
PUT
Idexx Laboratories
IDXX
$45.1B
| $413K | ﹤0.01% |
1,000
-1,400
| -58% | -$614K |
|
3741
SIGA Technologies
SIGA
$219M
| $413K | ﹤0.01% |
68,869
+34,072
| +98% | +$228K |
|
3742
YieldMax TSLA Option Income Strategy ETF
TSLY
$621M
| $413K | ﹤0.01% |
+5,799
| New | +$410K |
|
3743
CALL
United Bankshares
UBSI
$6.66B
| $413K | ﹤0.01% |
11,000
-9,300
| -46% | -$366K |
|
|
VRN
3744
PUT
DELISTED
Veren
VRN
| $413K | ﹤0.01% |
80,500
+30,200
| +60% | +$166K |
|
3745
PUT
Erie Indemnity
ERIE
$12.8B
| $412K | ﹤0.01% |
+1,000
| New | +$448K |
|
3746
PUT
Labcorp
LH
$25.5B
| $412K | ﹤0.01% |
1,800
+900
| +100% | +$206K |
|
3747
OneMain Financial
OMF
$7.15B
| $411K | ﹤0.01% |
+7,897
| New | +$409K |
|
|
SILA
3748
CALL
DELISTED
Sila Realty Trust
SILA
| $411K | ﹤0.01% |
16,900
+100
| +0.6% | +$2.52K |
|
3749
CALL
A.O. Smith
AOS
$8.81B
| $409K | ﹤0.01% |
6,000
-2,700
| -31% | -$204K |
|
3750
CALL
3D Systems Corp
DDD
$408M
| $409K | ﹤0.01% |
124,800
+59,300
| +91% | +$189K |
|
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.