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 |
Microsoft
MSFT
|
+$234M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$97.5M |
| 3 |
Amazon
AMZN
|
+$96.8M |
| 4 |
iShares Bitcoin Trust
IBIT
|
+$80.6M |
| 5 |
Pinduoduo
PDD
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$129M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$92.9M |
| 3 |
Broadcom
AVGO
|
+$82.9M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$68.4M |
| 5 |
Meta Platforms (Facebook)
META
|
+$59.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.79% |
| 2 | Consumer Discretionary | 0.3% |
| 3 | Healthcare | 0.25% |
| 4 | Financials | 0.17% |
| 5 | Industrials | 0.09% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2101
CALL
Equinix
EQIX
$107B
| $2.51M | ﹤0.01% |
3,200
+700
| +28% | +$547K |
|
2102
CALL
Cracker Barrel
CBRL
$1.2B
| $2.5M | ﹤0.01% |
56,800
+7,200
| +15% | +$416K |
|
|
HOLX
2103
CALL
DELISTED
Hologic
HOLX
| $2.5M | ﹤0.01% |
37,000
+18,600
| +101% | +$1.23M |
|
2104
FedEx
FDX
$74.5B
| $2.5M | ﹤0.01% |
10,581
-5,171
| -33% | -$1.19M |
|
2105
Millicom
TIGO
$15.8B
| $2.49M | ﹤0.01% |
51,353
+35,581
| +226% | +$1.56M |
|
|
VTLE
2106
CALL
DELISTED
Vital Energy
VTLE
| $2.49M | ﹤0.01% |
147,400
-227,500
| -61% | -$3.84M |
|
|
CGC
2107
CALL
Canopy Growth
CGC
$375M
| $2.48M | ﹤0.01% |
1,701,200
+256,900
| +18% | +$334K |
|
2108
PUT
Clover Health Investments
CLOV
$2.28B
| $2.48M | ﹤0.01% |
811,700
+375,600
| +86% | +$1.07M |
|
|
CNTA
2109
PUT
DELISTED
Centessa Pharmaceuticals
CNTA
| $2.48M | ﹤0.01% |
102,400
+99,500
| +3,431% | +$1.77M |
|
|
MBX
2110
PUT
MBX Biosciences
MBX
$2.95B
| $2.48M | ﹤0.01% |
141,900
+76,600
| +117% | +$1.02M |
|
2111
PUT
Carlyle Group
CG
$16.3B
| $2.48M | ﹤0.01% |
39,600
-30,600
| -44% | -$1.91M |
|
|
BTFX
2112
PUT
DELISTED
Valkyrie ETF Trust II CoinShares Bitcoin Leverage ETF
BTFX
| $2.48M | ﹤0.01% |
56,500
+6,900
| +14% | +$408K |
|
|
FIGR
2113
PUT
Figure Technology Solutions
FIGR
$6.1B
| $2.48M | ﹤0.01% |
+68,100
| New | +$2.65M |
|
2114
PUT
Hormel Foods
HRL
$13.9B
| $2.47M | ﹤0.01% |
100,000
+28,600
| +40% | +$792K |
|
2115
Enovix
ENVX
$862M
| $2.47M | ﹤0.01% |
248,028
+38,350
| +18% | +$424K |
|
2116
PUT
Commercial Metals
CMC
$7.63B
| $2.47M | ﹤0.01% |
43,100
-2,400
| -5% | -$133K |
|
|
K
2117
PUT
DELISTED
Kellanova
K
| $2.46M | ﹤0.01% |
30,000
+11,200
| +60% | +$891K |
|
2118
CALL
International Paper
IP
$22.3B
| $2.46M | ﹤0.01% |
53,000
-102,500
| -66% | -$5.01M |
|
2119
PUT
Thor Industries
THO
$3.99B
| $2.46M | ﹤0.01% |
23,700
+20,000
| +541% | +$2.01M |
|
2120
PUT
ADMA Biologics
ADMA
$1.92B
| $2.46M | ﹤0.01% |
167,500
+107,200
| +178% | +$1.84M |
|
2121
CALL
Warner Music
WMG
$13.8B
| $2.46M | ﹤0.01% |
72,100
-34,200
| -32% | -$1.09M |
|
2122
CALL
Amneal Pharmaceuticals
AMRX
$5.72B
| $2.45M | ﹤0.01% |
244,500
+226,500
| +1,258% | +$2.03M |
|
2123
CALL
NiSource
NI
$22.4B
| $2.44M | ﹤0.01% |
56,400
+55,800
| +9,300% | +$2.31M |
|
2124
CALL
Amer Sports
AS
$19.7B
| $2.44M | ﹤0.01% |
70,300
+50,700
| +259% | +$1.91M |
|
2125
PUT
Parsons
PSN
$6.28B
| $2.44M | ﹤0.01% |
29,400
-35,400
| -55% | -$2.74M |
|
Similar funds
Simplex Trading's Q3 2025 Portfolio in Review
As of Q3 2025, Simplex Trading held 10,358 positions worth $195B, up 12% from $175B the previous quarter. Its ten largest holdings account for 46% of the portfolio.
Simplex Trading's Q3 2025 filing shows 1,743 new, 3,828 increased, 3,250 reduced and 1,308 closed positions. Its largest new stake was Microsoft: 458,309 shares worth $237M. The largest sale was iShares 20+ Year Treasury Bond ETF, an estimated $129M.
By sector, the portfolio is most concentrated in Technology at 0.79% of assets, up from 0.74% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2025 buy was Microsoft: 458,309 shares worth $237M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q3 2025, an estimated $97.5M increase.
- Simplex Trading's biggest Q3 2025 reduction was Alphabet (Google) Class A, cutting an estimated $92.9M.
- Simplex Trading fully exited iShares 20+ Year Treasury Bond ETF in Q3 2025, selling an estimated $129M.
- Simplex Trading's ten largest holdings make up 46% of its $195B portfolio in Q3 2025.
- Simplex Trading opened 1,743 new positions and closed 1,308 in Q3 2025.
- Simplex Trading's portfolio value rose 12% quarter-over-quarter to $195B.
Based on Simplex Trading's 13F filing for Q3 2025, filed 12 Nov 2025.