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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
5026
ClearPoint Neuro
CLPT
$437M
| $122K | ﹤0.01% |
10,943
+4,046
| +59% | +$38.7K |
|
5027
CALL
IDT Corp
IDT
$1.64B
| $122K | ﹤0.01% |
3,200
-11,600
| -78% | -$431K |
|
5028
PUT
LiveWire
LVWR
$422M
| $122K | ﹤0.01% |
20,000
| – | – |
|
5029
CALL
Magnolia Oil & Gas
MGY
$5.93B
| $122K | ﹤0.01% |
5,000
-1,900
| -28% | -$47.9K |
|
5030
Murphy Oil
MUR
$5.48B
| $122K | ﹤0.01% |
3,640
-8,231
| -69% | -$311K |
|
5031
CALL
Regency Centers
REG
$14.7B
| $122K | ﹤0.01% |
1,700
+1,600
| +1,600% | +$111K |
|
5032
CALL
SkyWater Technology
SKYT
$1.6B
| $122K | ﹤0.01% |
13,500
-10,900
| -45% | -$90.9K |
|
5033
SSR Mining
SSRM
$5.54B
| $122K | ﹤0.01% |
21,630
-39,641
| -65% | -$208K |
|
5034
Vornado Realty Trust
VNO
$7.55B
| $122K | ﹤0.01% |
+3,105
| New | +$99.9K |
|
|
ROIC
5035
DELISTED
Retail Opportunity Investments Corp.
ROIC
| $122K | ﹤0.01% |
7,768
+5,922
| +321% | +$86.5K |
|
|
CIM
5036
CALL
Chimera Investment
CIM
$1.06B
| $121K | ﹤0.01% |
7,700
-13,100
| -63% | -$196K |
|
5037
CALL
Designer Brands
DBI
$314M
| $121K | ﹤0.01% |
16,400
-9,500
| -37% | -$66.5K |
|
5038
CALL
Goldman Sachs BDC
GSBD
$975M
| $121K | ﹤0.01% |
8,800
-42,400
| -83% | -$616K |
|
|
HSAI
5039
CALL
Hesai Group
HSAI
$2.6B
| $121K | ﹤0.01% |
26,000
+14,400
| +124% | +$60.6K |
|
5040
CALL
RPM International
RPM
$13.8B
| $121K | ﹤0.01% |
1,000
-5,400
| -84% | -$625K |
|
5041
PUT
Royalty Pharma
RPRX
$26.2B
| $121K | ﹤0.01% |
4,300
-16,400
| -79% | -$454K |
|
5042
PUT
Sigma Lithium
SGML
$1.12B
| $121K | ﹤0.01% |
9,800
-24,400
| -71% | -$266K |
|
5043
Comtech Telecommunications
CMTL
$50.9M
| $120K | ﹤0.01% |
24,968
-36,846
| -60% | -$121K |
|
5044
CALL
Genco Shipping & Trading
GNK
$1.13B
| $120K | ﹤0.01% |
6,200
-600
| -9% | -$11.2K |
|
5045
CALL
IDEAYA Biosciences
IDYA
$3.5B
| $120K | ﹤0.01% |
3,800
+2,500
| +192% | +$94.8K |
|
5046
CALL
LivaNova
LIVN
$4.45B
| $120K | ﹤0.01% |
2,300
-7,000
| -75% | -$347K |
|
|
RDUS
5047
CALL
DELISTED
Radius Recycling
RDUS
| $120K | ﹤0.01% |
6,500
+5,700
| +713% | +$91K |
|
5048
PUT
RXO
RXO
$3.39B
| $120K | ﹤0.01% |
4,300
-71,100
| -94% | -$2.01M |
|
5049
CALL
Sportsman's Warehouse
SPWH
$45.3M
| $120K | ﹤0.01% |
44,300
+23,000
| +108% | +$54.7K |
|
|
SW
5050
Smurfit Westrock
SW
$24.9B
| $120K | ﹤0.01% |
+2,434
| New | +$111K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.