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 | |
|---|---|---|---|---|---|---|
776
PUT
PENN Entertainment
PENN
$2.71B
| $13.6M | 0.01% |
594,400
+401,700
| +208% | +$9.72M |
|
777
PUT
Plug Power
PLUG
$3.06B
| $13.6M | 0.01% |
1,787,200
-368,200
| -17% | -$3.6M |
|
778
CALL
Live Nation Entertainment
LYV
$41B
| $13.6M | 0.01% |
163,200
+33,600
| +26% | +$2.93M |
|
779
PUT
Suncor Energy
SU
$78.4B
| $13.5M | 0.01% |
393,500
+68,300
| +21% | +$2.19M |
|
780
State Street Consumer Staples Select Sector SPDR ETF
XLP
$14B
| $13.5M | 0.01% |
196,156
-115,050
| -37% | -$8.42M |
|
781
Warner Bros
WBD
$65.1B
| $13.5M | 0.01% |
1,238,898
+445,574
| +56% | +$5.56M |
|
782
PUT
Veeva Systems
VEEV
$29.2B
| $13.4M | 0.01% |
66,100
-6,600
| -9% | -$1.33M |
|
783
CALL
Schwab US Broad Market ETF
SCHB
$42.7B
| $13.4M | 0.01% |
577,200
+226,200
| +64% | +$3.91M |
|
784
PUT
GitLab
GTLB
$5.1B
| $13.4M | 0.01% |
296,600
-134,800
| -31% | -$6.45M |
|
785
CALL
Nice
NICE
$5.09B
| $13.4M | 0.01% |
78,800
+59,500
| +308% | +$11.8M |
|
|
IPFF
786
CALL
DELISTED
iShares International Preferred Stock ETF
IPFF
| $13.4M | 0.01% |
241,900
+91,500
| +61% | +$5.06M |
|
787
CALL
PG&E
PCG
$38.6B
| $13.4M | 0.01% |
828,500
-88,100
| -10% | -$1.51M |
|
|
VMW
788
DELISTED
VMware, Inc
VMW
| $13.4M | 0.01% |
80,244
+36,166
| +82% | +$5.79M |
|
789
CALL
Teva Pharmaceuticals
TEVA
$36.3B
| $13.3M | 0.01% |
1,308,000
+556,500
| +74% | +$5.18M |
|
790
CALL
Prologis
PLD
$135B
| $13.3M | 0.01% |
118,800
+46,800
| +65% | +$5.72M |
|
791
CALL
Corning
GLW
$134B
| $13.3M | 0.01% |
436,900
-236,500
| -35% | -$7.73M |
|
792
CALL
Silicon Laboratories
SLAB
$7.15B
| $13.3M | 0.01% |
114,700
+107,000
| +1,390% | +$14.8M |
|
793
CALL
Teradyne
TER
$58.5B
| $13.3M | 0.01% |
132,200
+41,900
| +46% | +$4.42M |
|
794
PUT
Keurig Dr Pepper
KDP
$40.4B
| $13.3M | 0.01% |
420,500
+65,900
| +19% | +$2.17M |
|
795
CALL
Southern Company
SO
$109B
| $13.3M | 0.01% |
205,000
-65,400
| -24% | -$4.54M |
|
796
PUT
VF Corp
VFC
$6.49B
| $13.3M | 0.01% |
750,300
-113,600
| -13% | -$2.16M |
|
797
CALL
Elbit Systems
ESLT
$37.9B
| $13.2M | 0.01% |
66,900
+64,200
| +2,378% | +$13.1M |
|
798
CALL
SolarEdge
SEDG
$2.75B
| $13.2M | 0.01% |
102,000
+27,200
| +36% | +$5.22M |
|
799
PUT
Kraft Heinz
KHC
$30.1B
| $13.2M | 0.01% |
391,200
+217,900
| +126% | +$7.53M |
|
800
PUT
Caesars Entertainment
CZR
$6.09B
| $13.1M | 0.01% |
282,400
-194,600
| -41% | -$10.3M |
|
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.