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 | |
|---|---|---|---|---|---|---|
|
PPL
2601
CALL
PPL Corp
PPL
$27.3B
| $1.06M | ﹤0.01% |
45,100
+24,600
| +120% | +$636K |
|
|
LITS
2602
PUT
Lite Strategy Inc
LITS
$33.6M
| $1.06M | ﹤0.01% |
+151,400
| New | +$994K |
|
|
SIX
2603
DELISTED
Six Flags Entertainment Corp.
SIX
| $1.06M | ﹤0.01% |
45,160
-154
| -0.3% | -$3.64K |
|
|
LSXMA
2604
DELISTED
Liberty Media Corporation Series A Liberty SiriusXM Common Stock
LSXMA
| $1.06M | ﹤0.01% |
41,614
-12,435
| -23% | -$294K |
|
2605
CALL
Sterling Infrastructure
STRL
$20.3B
| $1.06M | ﹤0.01% |
14,400
+13,600
| +1,700% | +$952K |
|
2606
CALL
Xenon Pharmaceuticals
XENE
$6.32B
| $1.06M | ﹤0.01% |
31,000
+26,700
| +621% | +$999K |
|
2607
CALL
OR Royalties Inc
OR
$5.47B
| $1.06M | ﹤0.01% |
89,900
-133,300
| -60% | -$1.82M |
|
2608
Saia
SAIA
$11.3B
| $1.05M | ﹤0.01% |
+2,648
| New | +$1.07M |
|
2609
CALL
Labcorp
LH
$24.3B
| $1.05M | ﹤0.01% |
11,000
-21,243
| -66% | -$4.48M |
|
2610
CALL
Acadia Pharmaceuticals
ACAD
$4.25B
| $1.05M | ﹤0.01% |
50,500
+22,600
| +81% | +$614K |
|
2611
CALL
Metropolitan Bank Holding Corp
MCB
$1.13B
| $1.05M | ﹤0.01% |
29,000
-14,700
| -34% | -$601K |
|
2612
CALL
Qualys
QLYS
$4.84B
| $1.05M | ﹤0.01% |
6,900
+6,700
| +3,350% | +$964K |
|
|
CIVI
2613
CALL
DELISTED
Civitas Resources
CIVI
| $1.05M | ﹤0.01% |
13,000
+7,000
| +117% | +$541K |
|
2614
PUT
InterDigital
IDCC
$6.68B
| $1.05M | ﹤0.01% |
13,100
+8,300
| +173% | +$721K |
|
2615
CALL
Bio-Techne
TECH
$11.2B
| $1.05M | ﹤0.01% |
15,400
+11,900
| +340% | +$940K |
|
2616
Arthur J. Gallagher & Co
AJG
$63.7B
| $1.05M | ﹤0.01% |
+4,594
| New | +$1.03M |
|
2617
CALL
Manhattan Associates
MANH
$8.97B
| $1.05M | ﹤0.01% |
5,300
+4,400
| +489% | +$859K |
|
2618
PUT
SandRidge Energy
SD
$510M
| $1.04M | ﹤0.01% |
66,700
+23,200
| +53% | +$371K |
|
|
TIGR
2619
PUT
UP Fintech Holding
TIGR
$845M
| $1.04M | ﹤0.01% |
204,000
+92,000
| +82% | +$372K |
|
2620
PUT
ODDITY Tech
ODD
$708M
| $1.04M | ﹤0.01% |
+36,800
| New | +$1.56M |
|
2621
CALL
Henry Schein
HSIC
$9.74B
| $1.04M | ﹤0.01% |
14,000
-17,900
| -56% | -$1.38M |
|
2622
iShares JPMorgan USD Emerging Markets Bond ETF
EMB
$14.9B
| $1.04M | ﹤0.01% |
+12,578
| New | +$1.07M |
|
2623
CALL
EVgo
EVGO
$200M
| $1.04M | ﹤0.01% |
306,700
+78,900
| +35% | +$325K |
|
2624
PUT
Kinsale Capital Group
KNSL
$7.95B
| $1.03M | ﹤0.01% |
2,500
+1,800
| +257% | +$699K |
|
|
BPMC
2625
DELISTED
Blueprint Medicines
BPMC
| $1.03M | ﹤0.01% |
20,502
+5,978
| +41% | +$319K |
|
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.