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 | |
|---|---|---|---|---|---|---|
1001
CALL
C.H. Robinson
CHRW
$24.2B
| $9.55M | ﹤0.01% |
72,100
+41,500
| +136% | +$4.87M |
|
1002
CALL
Planet Labs
PL
$7.97B
| $9.53M | ﹤0.01% |
734,100
+492,400
| +204% | +$3.8M |
|
1003
PUT
Toast
TOST
$16.5B
| $9.52M | ﹤0.01% |
260,700
-41,000
| -14% | -$1.78M |
|
1004
PUT
Waste Management
WM
$95.3B
| $9.52M | ﹤0.01% |
43,100
-7,800
| -15% | -$1.76M |
|
1005
CALL
BCE
BCE
$19.8B
| $9.5M | ﹤0.01% |
406,200
-93,200
| -19% | -$2.24M |
|
|
EH
1006
CALL
EHang Holdings
EH
$386M
| $9.5M | ﹤0.01% |
511,500
+260,000
| +103% | +$4.55M |
|
1007
PUT
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$163M
| $9.5M | ﹤0.01% |
285,500
+59,500
| +26% | +$2.35M |
|
1008
CALL
Booz Allen Hamilton
BAH
$7.9B
| $9.49M | ﹤0.01% |
95,000
-16,700
| -15% | -$1.79M |
|
1009
Mercado Libre
MELI
$91.2B
| $9.49M | ﹤0.01% |
4,060
+50
| +1% | +$120K |
|
1010
ServiceNow
NOW
$95.1B
| $9.48M | ﹤0.01% |
51,500
+28,125
| +120% | +$5.25M |
|
1011
CALL
APA Corp
APA
$12.9B
| $9.48M | ﹤0.01% |
390,300
-352,900
| -47% | -$7.45M |
|
1012
CALL
NXP Semiconductors
NXPI
$70B
| $9.47M | ﹤0.01% |
41,600
-15,500
| -27% | -$3.49M |
|
1013
CALL
Golar LNG
GLNG
$5.07B
| $9.46M | ﹤0.01% |
234,100
+4,300
| +2% | +$178K |
|
1014
PUT
Wheaton Precious Metals
WPM
$50B
| $9.44M | ﹤0.01% |
84,400
+56,600
| +204% | +$5.53M |
|
1015
Strategy Inc
MSTR
$34.2B
| $9.43M | ﹤0.01% |
+29,257
| New | +$10.9M |
|
1016
Vertiv
VRT
$117B
| $9.4M | ﹤0.01% |
62,337
+6,234
| +11% | +$832K |
|
1017
PUT
CarMax
KMX
$8.29B
| $9.4M | ﹤0.01% |
209,500
+81,000
| +63% | +$4.84M |
|
1018
PUT
Kinross Gold
KGC
$28.3B
| $9.37M | ﹤0.01% |
377,200
+60,700
| +19% | +$1.17M |
|
|
TIGR
1019
CALL
UP Fintech Holding
TIGR
$870M
| $9.37M | ﹤0.01% |
878,000
-301,200
| -26% | -$3.23M |
|
1020
PUT
Matador Resources
MTDR
$6.42B
| $9.35M | ﹤0.01% |
208,000
-27,500
| -12% | -$1.34M |
|
1021
PUT
Macy's
M
$6.14B
| $9.32M | ﹤0.01% |
519,700
+94,100
| +22% | +$1.33M |
|
1022
PUT
Sempra
SRE
$61.1B
| $9.3M | ﹤0.01% |
103,400
-55,800
| -35% | -$4.52M |
|
1023
CALL
JPMorgan Inflation Managed Bond ETF
JCPI
$865M
| $9.3M | ﹤0.01% |
161,700
+46,500
| +40% | +$2.25M |
|
1024
CALL
Grayscale Bitcoin Trust
GBTC
$9.74B
| $9.26M | ﹤0.01% |
103,100
-41,500
| -29% | -$3.73M |
|
1025
PUT
Cheniere Energy
LNG
$57B
| $9.23M | ﹤0.01% |
39,300
+18,100
| +85% | +$4.25M |
|
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.