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 | |
|---|---|---|---|---|---|---|
6051
Dynagas LNG Partners
DLNG
$134M
| $41K | ﹤0.01% |
10,910
-1,867
| -15% | -$7.07K |
|
6052
iShares MSCI Pacific ex Japan ETF
EPP
$2.25B
| $41K | ﹤0.01% |
846
+361
| +74% | +$16.1K |
|
6053
CALL
First Advantage
FA
$3.44B
| $41K | ﹤0.01% |
2,100
-13,200
| -86% | -$235K |
|
6054
CALL
Fulton Financial
FULT
$4.66B
| $41K | ﹤0.01% |
2,300
-4,100
| -64% | -$74.7K |
|
6055
PUT
Haverty Furniture Companies
HVT
$403M
| $41K | ﹤0.01% |
1,500
+1,100
| +275% | +$29.5K |
|
6056
CALL
Ingredion
INGR
$6.33B
| $41K | ﹤0.01% |
300
-2,400
| -89% | -$305K |
|
6057
GraniteShares 2x Short NVDA Daily ETF
NVD
$62.6M
| $41K | ﹤0.01% |
958
-946
| -50% | -$49.8K |
|
|
ODP
6058
CALL
DELISTED
ODP
ODP
| $41K | ﹤0.01% |
1,400
+400
| +40% | +$13.3K |
|
6059
CALL
Orion Group Holdings
ORN
$388M
| $41K | ﹤0.01% |
7,200
+4,000
| +125% | +$30.8K |
|
6060
Outdoor Holding Co
POWW
$247M
| $41K | ﹤0.01% |
29,155
-6,486
| -18% | -$10.3K |
|
6061
PUT
PSQ Holdings
PSQH
$13.9M
| $41K | ﹤0.01% |
1,120
+120
| +12% | +$5.2K |
|
6062
PUT
Reservoir Media
RSVR
$709M
| $41K | ﹤0.01% |
5,100
| – | – |
|
6063
SkyWater Technology
SKYT
$1.6B
| $41K | ﹤0.01% |
4,622
-676
| -13% | -$5.64K |
|
6064
PUT
BlackRock TCP Capital
TCPC
$273M
| $41K | ﹤0.01% |
5,000
+200
| +4% | +$1.92K |
|
|
UDMY
6065
CALL
DELISTED
Udemy
UDMY
| $41K | ﹤0.01% |
5,600
-27,500
| -83% | -$222K |
|
6066
Unisys
UIS
$230M
| $41K | ﹤0.01% |
+7,357
| New | +$36.5K |
|
6067
CALL
Viemed Healthcare
VMD
$451M
| $41K | ﹤0.01% |
+5,600
| New | +$40K |
|
6068
PUT
Woodside Energy
WDS
$44.4B
| $41K | ﹤0.01% |
2,400
-5,300
| -69% | -$94K |
|
|
OKLO
6069
Oklo
OKLO
$7.15B
| $41K | ﹤0.01% |
5,141
-34,751
| -87% | -$262K |
|
|
AMPS
6070
DELISTED
Altus Power
AMPS
| $41K | ﹤0.01% |
+13,114
| New | +$46.7K |
|
|
LICY
6071
DELISTED
Li-Cycle Holdings Corp.
LICY
| $41K | ﹤0.01% |
18,940
+13,952
| +280% | +$38.5K |
|
6072
Appian
APPN
$1.94B
| $40K | ﹤0.01% |
1,195
-17,861
| -94% | -$578K |
|
6073
Benchmark Electronics
BHE
$2.85B
| $40K | ﹤0.01% |
918
+225
| +32% | +$9.39K |
|
|
BRT
6074
CALL
BRT Apartments
BRT
$284M
| $40K | ﹤0.01% |
2,300
+400
| +21% | +$7.27K |
|
6075
CALL
Cabaletta Bio
CABA
$444M
| $40K | ﹤0.01% |
8,500
-43,400
| -84% | -$251K |
|
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.