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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1276
PUT
Peloton Interactive
PTON
$2.63B
| $5.52M | ﹤0.01% |
1,092,400
-171,700
| -14% | -$1.22M |
|
1277
Progressive
PGR
$124B
| $5.49M | ﹤0.01% |
39,381
+29,621
| +303% | +$3.9M |
|
1278
Devon Energy
DVN
$52B
| $5.48M | ﹤0.01% |
+114,968
| New | +$5.79M |
|
|
BRSL
1279
PUT
Brightstar Lottery PLC
BRSL
$1.93B
| $5.48M | ﹤0.01% |
180,800
+46,700
| +35% | +$1.49M |
|
1280
Cameco
CCJ
$37.6B
| $5.48M | ﹤0.01% |
+138,214
| New | +$4.89M |
|
1281
CALL
Fair Isaac
FICO
$28.8B
| $5.47M | ﹤0.01% |
6,300
-11,100
| -64% | -$9.53M |
|
1282
PUT
MasTec
MTZ
$27B
| $5.47M | ﹤0.01% |
76,000
+70,100
| +1,188% | +$6.99M |
|
1283
PUT
Royal Bank of Canada
RY
$290B
| $5.46M | ﹤0.01% |
62,500
+12,800
| +26% | +$1.19M |
|
1284
PUT
Saia
SAIA
$11.3B
| $5.46M | ﹤0.01% |
13,700
+9,700
| +243% | +$3.91M |
|
1285
PENN Entertainment
PENN
$2.75B
| $5.46M | ﹤0.01% |
+237,719
| New | +$5.75M |
|
1286
CALL
Yelp
YELP
$1.4B
| $5.45M | ﹤0.01% |
131,100
+111,300
| +562% | +$4.68M |
|
1287
PUT
KeyCorp
KEY
$24.3B
| $5.45M | ﹤0.01% |
506,300
-221,200
| -30% | -$2.45M |
|
1288
CALL
PennyMac Financial
PFSI
$4.4B
| $5.45M | ﹤0.01% |
81,800
+62,000
| +313% | +$4.46M |
|
1289
PUT
iQIYI
IQ
$1.18B
| $5.44M | ﹤0.01% |
1,148,200
+198,400
| +21% | +$1.03M |
|
1290
CALL
GoDaddy
GDDY
$12.3B
| $5.43M | ﹤0.01% |
72,900
-41,500
| -36% | -$3.06M |
|
1291
CALL
Global Payments
GPN
$22.1B
| $5.42M | ﹤0.01% |
47,000
+12,400
| +36% | +$1.48M |
|
1292
CALL
Yum China
YUMC
$14.9B
| $5.42M | ﹤0.01% |
97,200
+58,400
| +151% | +$3.27M |
|
1293
PUT
Thor Industries
THO
$4B
| $5.41M | ﹤0.01% |
56,900
-17,800
| -24% | -$1.86M |
|
1294
CALL
Warner Music
WMG
$14.1B
| $5.41M | ﹤0.01% |
172,300
-16,600
| -9% | -$520K |
|
|
EDR
1295
PUT
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $5.4M | ﹤0.01% |
271,400
+212,200
| +358% | +$4.87M |
|
|
GTM
1296
CALL
ZoomInfo Technologies
GTM
$866M
| $5.37M | ﹤0.01% |
327,700
+156,400
| +91% | +$3.2M |
|
1297
PUT
Healthpeak Properties
DOC
$15.3B
| $5.37M | ﹤0.01% |
292,600
-3,400
| -1% | -$69.8K |
|
|
BNY
1298
Bank of New York Mellon
BNY
$108B
| $5.35M | ﹤0.01% |
125,418
+65,094
| +108% | +$2.9M |
|
1299
PUT
NetApp
NTAP
$32.7B
| $5.35M | ﹤0.01% |
70,500
-21,800
| -24% | -$1.68M |
|
1300
CALL
Corpay
CPAY
$24.3B
| $5.34M | ﹤0.01% |
20,900
+10,700
| +105% | +$2.8M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.