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 | |
|---|---|---|---|---|---|---|
2876
Omega Healthcare
OHI
$15.4B
| $1.04M | ﹤0.01% |
25,508
+1,423
| +6% | +$53.8K |
|
|
OPRA
2877
PUT
Opera Ltd
OPRA
$1.65B
| $1.04M | ﹤0.01% |
67,200
-7,500
| -10% | -$101K |
|
2878
CALL
PagSeguro Digital
PAGS
$2.57B
| $1.04M | ﹤0.01% |
120,600
-56,100
| -32% | -$649K |
|
2879
CALL
PagerDuty
PD
$700M
| $1.04M | ﹤0.01% |
56,000
-41,300
| -42% | -$806K |
|
2880
CALL
AutoNation
AN
$6.97B
| $1.04M | ﹤0.01% |
5,800
-1,800
| -24% | -$309K |
|
2881
CALL
Autoliv
ALV
$8.6B
| $1.04M | ﹤0.01% |
11,100
+10,300
| +1,288% | +$1.03M |
|
2882
PUT
Lightspeed Commerce
LSPD
$1.3B
| $1.03M | ﹤0.01% |
62,800
-52,200
| -45% | -$697K |
|
2883
PUT
DoubleVerify
DV
$1.62B
| $1.03M | ﹤0.01% |
61,400
+400
| +0.7% | +$7.63K |
|
2884
PUT
Emcor
EME
$33.1B
| $1.03M | ﹤0.01% |
2,400
+1,500
| +167% | +$566K |
|
2885
PUT
Varonis Systems
VRNS
$5.25B
| $1.03M | ﹤0.01% |
18,300
-8,900
| -33% | -$468K |
|
2886
CALL
CenterPoint Energy
CNP
$29.1B
| $1.03M | ﹤0.01% |
35,100
+9,300
| +36% | +$260K |
|
|
EQC
2887
CALL
DELISTED
Equity Commonwealth
EQC
| $1.03M | ﹤0.01% |
51,900
+50,400
| +3,360% | +$1M |
|
2888
PUT
Petco
WOOF
$745M
| $1.03M | ﹤0.01% |
226,600
-29,300
| -11% | -$99.5K |
|
2889
CALL
Hudbay
HBM
$9.92B
| $1.03M | ﹤0.01% |
112,100
-73,800
| -40% | -$595K |
|
2890
PUT
UGI
UGI
$8B
| $1.03M | ﹤0.01% |
41,200
-52,700
| -56% | -$1.27M |
|
2891
CALL
Coeur Mining
CDE
$15.6B
| $1.03M | ﹤0.01% |
149,600
+41,100
| +38% | +$256K |
|
2892
CALL
Cullen/Frost Bankers
CFR
$10.3B
| $1.03M | ﹤0.01% |
9,200
-4,900
| -35% | -$536K |
|
2893
CALL
SandRidge Energy
SD
$510M
| $1.03M | ﹤0.01% |
84,200
+40,800
| +94% | +$521K |
|
2894
PUT
Tecnoglass
TGLS
$2.01B
| $1.03M | ﹤0.01% |
15,000
-1,900
| -11% | -$110K |
|
|
2895
PUT
Autoliv
ALV
$8.6B
| $1.03M | ﹤0.01% |
11,000
+10,500
| +2,100% | +$1.05M |
|
2896
CALL
Establishment Labs
ESTA
$2.72B
| $1.02M | ﹤0.01% |
23,700
+19,000
| +404% | +$826K |
|
2897
PUT
Caleres
CAL
$396M
| $1.02M | ﹤0.01% |
31,000
+4,600
| +17% | +$167K |
|
2898
CALL
Expeditors International
EXPD
$22.9B
| $1.02M | ﹤0.01% |
7,800
+6,000
| +333% | +$735K |
|
2899
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $1.02M | ﹤0.01% |
42,600
-40,500
| -49% | -$789K |
|
2900
PBF Energy
PBF
$7.29B
| $1.02M | ﹤0.01% |
33,028
-34,761
| -51% | -$1.26M |
|
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.