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 | |
|---|---|---|---|---|---|---|
1226
ProShares UltraPro QQQ
TQQQ
$32B
| $5.94M | ﹤0.01% |
333,304
-628,876
| -65% | -$12.8M |
|
1227
CALL
British American Tobacco
BTI
$132B
| $5.92M | ﹤0.01% |
188,500
-63,800
| -25% | -$2.1M |
|
1228
CALL
DigitalBridge
DBRG
$2.93B
| $5.9M | ﹤0.01% |
335,800
+187,500
| +126% | +$3.1M |
|
1229
Gilead Sciences
GILD
$162B
| $5.9M | ﹤0.01% |
78,758
-43,557
| -36% | -$3.35M |
|
|
NVO
1230
Novo Nordisk
NVO
$217B
| $5.9M | ﹤0.01% |
+64,905
| New | +$5.72M |
|
1231
CALL
Toll Brothers
TOL
$14.2B
| $5.9M | ﹤0.01% |
79,800
-31,600
| -28% | -$2.49M |
|
1232
CALL
Hawaiian Electric Industries
HE
$2.34B
| $5.9M | ﹤0.01% |
479,000
+477,100
| +25,111% | +$11.6M |
|
1233
PUT
Centene
CNC
$31.3B
| $5.88M | ﹤0.01% |
85,400
+18,100
| +27% | +$1.2M |
|
1234
CALL
Beyond Meat
BYND
$289M
| $5.88M | ﹤0.01% |
611,200
-7,000
| -1% | -$91.3K |
|
1235
CALL
Groupon
GRPN
$994M
| $5.88M | ﹤0.01% |
383,500
+163,500
| +74% | +$1.59M |
|
1236
Norwegian Cruise Line
NCLH
$9.13B
| $5.86M | ﹤0.01% |
355,768
-63,701
| -15% | -$1.18M |
|
1237
CALL
Cognizant
CTSH
$21.3B
| $5.84M | ﹤0.01% |
86,200
-4,600
| -5% | -$317K |
|
1238
PUT
Vodafone
VOD
$35.1B
| $5.82M | ﹤0.01% |
613,400
+188,000
| +44% | +$1.78M |
|
1239
CALL
Parker-Hannifin
PH
$126B
| $5.8M | ﹤0.01% |
14,900
-7,200
| -33% | -$2.89M |
|
1240
PUT
First Citizens BancShares
FCNCA
$25.1B
| $5.8M | ﹤0.01% |
4,200
-300
| -7% | -$412K |
|
1241
PUT
Revolve Group
RVLV
$1.79B
| $5.8M | ﹤0.01% |
425,900
-290,900
| -41% | -$4.63M |
|
1242
PUT
ZTO Express
ZTO
$18.3B
| $5.79M | ﹤0.01% |
239,400
+230,700
| +2,652% | +$5.87M |
|
1243
iShares Russell 1000 Growth ETF
IWF
$123B
| $5.77M | ﹤0.01% |
86,732
-25,144
| -22% | -$1.74M |
|
1244
PUT
Invesco CurrencyShares Euro Currency Trust
FXE
$331M
| $5.76M | ﹤0.01% |
59,000
+8,300
| +16% | +$834K |
|
1245
PUT
Norfolk Southern
NSC
$79.2B
| $5.75M | ﹤0.01% |
29,200
-29,600
| -50% | -$6.4M |
|
1246
CALL
Factset
FDS
$8.95B
| $5.73M | ﹤0.01% |
13,100
+9,700
| +285% | +$4.13M |
|
1247
PUT
Nasdaq
NDAQ
$52.3B
| $5.72M | ﹤0.01% |
117,800
+28,200
| +31% | +$1.43M |
|
1248
Truist Financial
TFC
$63.3B
| $5.72M | ﹤0.01% |
199,881
+110,283
| +123% | +$3.39M |
|
1249
CALL
Genuine Parts
GPC
$17.1B
| $5.72M | ﹤0.01% |
39,600
-43,700
| -52% | -$6.79M |
|
1250
CALL
CAVA Group
CAVA
$7.53B
| $5.71M | ﹤0.01% |
186,600
+150,700
| +420% | +$6.58M |
|
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.