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 | |
|---|---|---|---|---|---|---|
3626
CALL
Westrock Coffee
WEST
$769M
| $481K | ﹤0.01% |
74,100
-5,300
| -7% | -$46.6K |
|
3627
PUT
CarGurus
CARG
$3.15B
| $480K | ﹤0.01% |
16,000
-500
| -3% | -$13.5K |
|
3628
PUT
ODDITY Tech
ODD
$758M
| $480K | ﹤0.01% |
11,900
-10,900
| -48% | -$420K |
|
3629
PUT
Tennant Co
TNC
$1.48B
| $480K | ﹤0.01% |
+5,000
| New | +$488K |
|
|
RVNC
3630
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $480K | ﹤0.01% |
92,600
-9,300
| -9% | -$46.2K |
|
3631
CALL
Archrock
AROC
$6.26B
| $479K | ﹤0.01% |
23,700
+1,800
| +8% | +$36.4K |
|
3632
PUT
Buckle
BKE
$2.25B
| $479K | ﹤0.01% |
10,900
-1,300
| -11% | -$53.3K |
|
3633
CALL
Globus Medical
GMED
$10.6B
| $479K | ﹤0.01% |
6,700
-11,500
| -63% | -$812K |
|
3634
CALL
The Honest Company
HNST
$423M
| $479K | ﹤0.01% |
134,300
+118,300
| +739% | +$443K |
|
3635
CALL
RBC Bearings
RBC
$18.5B
| $479K | ﹤0.01% |
1,600
+500
| +45% | +$144K |
|
3636
PUT
USA Compression Partners
USAC
$3.72B
| $479K | ﹤0.01% |
20,900
+1,500
| +8% | +$34.1K |
|
3637
CALL
Cogent Biosciences
COGT
$6.91B
| $478K | ﹤0.01% |
44,300
-23,000
| -34% | -$224K |
|
3638
PUT
Customers Bancorp
CUBI
$2.66B
| $478K | ﹤0.01% |
10,300
+9,900
| +2,475% | +$515K |
|
3639
CALL
Herc Holdings
HRI
$5.34B
| $478K | ﹤0.01% |
3,000
-1,400
| -32% | -$198K |
|
|
JMIA
3640
PUT
Jumia Technologies
JMIA
$752M
| $478K | ﹤0.01% |
89,600
-30,800
| -26% | -$228K |
|
3641
Bumble
BMBL
$386M
| $477K | ﹤0.01% |
74,894
+27,914
| +59% | +$210K |
|
3642
PUT
MasterCraft Boat Holdings
MCFT
$602M
| $477K | ﹤0.01% |
26,200
+6,100
| +30% | +$116K |
|
3643
PUT
Primerica
PRI
$9.81B
| $477K | ﹤0.01% |
1,800
-200
| -10% | -$50.5K |
|
3644
iShares Core US Aggregate Bond ETF
AGG
$138B
| $476K | ﹤0.01% |
+4,707
| New | +$470K |
|
3645
CALL
Park Hotels & Resorts
PK
$3.03B
| $475K | ﹤0.01% |
33,700
+19,300
| +134% | +$281K |
|
3646
CALL
MicroSectors FANG+ ETNs due Jan 8 2038
FNGS
$545M
| $474K | ﹤0.01% |
9,600
+3,200
| +50% | +$155K |
|
3647
PUT
NeoGenomics
NEO
$1.71B
| $473K | ﹤0.01% |
32,100
-600
| -2% | -$9.39K |
|
3648
CALL
Service Corp International
SCI
$11.4B
| $473K | ﹤0.01% |
6,000
-9,900
| -62% | -$753K |
|
3649
Vanguard Real Estate ETF
VNQ
$39.8B
| $473K | ﹤0.01% |
4,858
-17,827
| -79% | -$1.64M |
|
3650
PUT
Amdocs
DOX
$5.64B
| $472K | ﹤0.01% |
5,400
-1,100
| -17% | -$92.6K |
|
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.