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 | |
|---|---|---|---|---|---|---|
5776
Rexford Industrial Realty
REXR
$8.42B
| $57K | ﹤0.01% |
1,150
-1,473
| -56% | -$73.2K |
|
5777
BlackRock TCP Capital
TCPC
$273M
| $57K | ﹤0.01% |
6,986
+4,945
| +242% | +$47.5K |
|
5778
US Treasury 2 Year Note ETF
UTWO
$481M
| $57K | ﹤0.01% |
+1,172
| New | +$56.7K |
|
5779
PUT
Federal Agricultural Mortgage Class A
AGM.A
$1.67B
| $56K | ﹤0.01% |
300
+200
| +200% | +$29.7K |
|
|
AIV
5780
Aimco
AIV
$387M
| $56K | ﹤0.01% |
6,232
-8,415
| -57% | -$74.8K |
|
5781
Babcock & Wilcox
BW
$1.39B
| $56K | ﹤0.01% |
+27,685
| New | +$39.3K |
|
5782
Beazer Homes USA
BZH
$877M
| $56K | ﹤0.01% |
1,659
-3,321
| -67% | -$102K |
|
5783
PUT
Candel Therapeutics
CADL
$733M
| $56K | ﹤0.01% |
8,200
+6,000
| +273% | +$37.3K |
|
5784
PUT
Cullinan Oncology
CGEM
$1.01B
| $56K | ﹤0.01% |
+3,400
| New | +$60.3K |
|
5785
CALL
ClearPoint Neuro
CLPT
$448M
| $56K | ﹤0.01% |
5,000
-3,100
| -38% | -$29.7K |
|
5786
Lincoln Electric
LECO
$14.3B
| $56K | ﹤0.01% |
296
+162
| +121% | +$31.1K |
|
5787
CALL
PDS Biotechnology
PDSB
$38.4M
| $56K | ﹤0.01% |
14,900
+4,200
| +39% | +$14K |
|
|
PRA
5788
DELISTED
ProAssurance
PRA
| $56K | ﹤0.01% |
3,786
-16,499
| -81% | -$210K |
|
5789
Suzano
SUZ
$10.5B
| $56K | ﹤0.01% |
5,693
+3,368
| +145% | +$32.9K |
|
5790
CALL
SunCoke Energy
SXC
$720M
| $56K | ﹤0.01% |
6,500
-19,900
| -75% | -$184K |
|
5791
PUT
Universal Technical Institute
UTI
$2.16B
| $56K | ﹤0.01% |
3,500
-117,900
| -97% | -$2.02M |
|
|
VXRT
5792
CALL
DELISTED
Vaxart
VXRT
| $56K | ﹤0.01% |
66,500
-11,000
| -14% | -$8.41K |
|
5793
CALL
Walker & Dunlop
WD
$1.71B
| $56K | ﹤0.01% |
500
-1,900
| -79% | -$199K |
|
|
AAN
5794
DELISTED
The Aaron's Company Inc
AAN
| $56K | ﹤0.01% |
+5,703
| New | +$57.1K |
|
5795
ARK Web x.0 ETF
ARKW
$1.63B
| $55K | ﹤0.01% |
+651
| New | +$51.5K |
|
5796
PUT
Atmos Energy
ATO
$28.8B
| $55K | ﹤0.01% |
400
+100
| +33% | +$12.8K |
|
5797
Cardlytics
CDLX
$21.7M
| $55K | ﹤0.01% |
1,750
-328
| -16% | -$18.2K |
|
5798
CALL
Enovis
ENOV
$1.68B
| $55K | ﹤0.01% |
1,300
-200
| -13% | -$8.91K |
|
5799
PUT
First Industrial Realty Trust
FR
$8.73B
| $55K | ﹤0.01% |
1,000
+500
| +100% | +$26.9K |
|
5800
Haleon
HLN
$43.5B
| $55K | ﹤0.01% |
5,243
+5,057
| +2,719% | +$48.9K |
|
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.