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 | |
|---|---|---|---|---|---|---|
3726
PUT
Kimco Realty
KIM
$17.8B
| $441K | ﹤0.01% |
19,000
-500
| -3% | -$11K |
|
3727
United Microelectronic
UMC
$47.9B
| $441K | ﹤0.01% |
52,453
+43,567
| +490% | +$364K |
|
3728
ProShares UltraShort Silver
ZSL
$64.1M
| $440K | ﹤0.01% |
1,155
+1,136
| +5,979% | +$497K |
|
3729
Conagra Brands
CAG
$7.29B
| $439K | ﹤0.01% |
13,512
+6,685
| +98% | +$205K |
|
3730
CALL
Evolus
EOLS
$407M
| $439K | ﹤0.01% |
27,100
+18,900
| +230% | +$264K |
|
|
ETNB
3731
CALL
DELISTED
89bio
ETNB
| $439K | ﹤0.01% |
59,400
+1,800
| +3% | +$15.1K |
|
3732
MKS Inc
MKSI
$21.3B
| $439K | ﹤0.01% |
4,046
+909
| +29% | +$108K |
|
|
ORC
3733
Orchid Island Capital
ORC
$1.3B
| $439K | ﹤0.01% |
53,435
+42,498
| +389% | +$350K |
|
|
TERN
3734
PUT
DELISTED
Terns Pharmaceuticals
TERN
| $439K | ﹤0.01% |
52,700
+45,900
| +675% | +$378K |
|
3735
CALL
A10 Networks
ATEN
$2.41B
| $438K | ﹤0.01% |
30,400
-5,500
| -15% | -$74.2K |
|
3736
CALL
loanDepot
LDI
$541M
| $438K | ﹤0.01% |
160,700
+142,200
| +769% | +$336K |
|
3737
CALL
Amcor
AMCR
$20.9B
| $437K | ﹤0.01% |
7,720
+5,360
| +227% | +$285K |
|
3738
CALL
Grindr
GRND
$2.75B
| $437K | ﹤0.01% |
36,700
-102,400
| -74% | -$1.21M |
|
3739
Tyler Technologies
TYL
$13B
| $437K | ﹤0.01% |
+750
| New | +$422K |
|
|
TBCH
3740
CALL
Turtle Beach Corp
TBCH
$245M
| $437K | ﹤0.01% |
28,500
-27,600
| -49% | -$402K |
|
3741
iShares S&P 500 Growth ETF
IVW
$72.2B
| $436K | ﹤0.01% |
4,555
-19,400
| -81% | -$1.79M |
|
3742
Ovintiv
OVV
$16.6B
| $436K | ﹤0.01% |
+11,387
| New | +$492K |
|
|
SEMR
3743
CALL
DELISTED
Semrush
SEMR
| $436K | ﹤0.01% |
27,800
-1,900
| -6% | -$26.5K |
|
3744
CALL
Bausch + Lomb
BLCO
$5.8B
| $435K | ﹤0.01% |
22,600
+800
| +4% | +$13.2K |
|
3745
PUT
NOV
NOV
$7.35B
| $435K | ﹤0.01% |
27,300
+12,600
| +86% | +$224K |
|
3746
CALL
Sun Life Financial
SLF
$46B
| $435K | ﹤0.01% |
7,500
-69,200
| -90% | -$3.62M |
|
3747
PUT
Credo Technology Group
CRDO
$38.8B
| $434K | ﹤0.01% |
14,100
-10,000
| -41% | -$298K |
|
3748
ITT
ITT
$17.7B
| $434K | ﹤0.01% |
+2,908
| New | +$396K |
|
3749
PUT
Omnicom Group
OMC
$23.5B
| $434K | ﹤0.01% |
4,200
-4,600
| -52% | -$442K |
|
|
LOGC
3750
PUT
DELISTED
ContextLogic
LOGC
| $434K | ﹤0.01% |
79,700
+34,700
| +77% | +$191K |
|
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.