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 | |
|---|---|---|---|---|---|---|
2576
CALL
Glaukos
GKOS
$9.02B
| $1.09M | ﹤0.01% |
14,500
+14,200
| +4,733% | +$1.06M |
|
2577
CALL
Polestar Automotive Holding UK
PSNY
$1.98B
| $1.09M | ﹤0.01% |
13,763
+5,303
| +63% | +$588K |
|
2578
CALL
Levi Strauss
LEVI
$9.44B
| $1.09M | ﹤0.01% |
80,200
-263,200
| -77% | -$3.68M |
|
|
CERE
2579
PUT
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $1.09M | ﹤0.01% |
49,800
+16,100
| +48% | +$403K |
|
2580
Perion Network
PERI
$367M
| $1.09M | ﹤0.01% |
35,468
+17,737
| +100% | +$595K |
|
2581
CALL
Performance Food Group
PFGC
$17.5B
| $1.08M | ﹤0.01% |
18,400
+12,100
| +192% | +$732K |
|
2582
PUT
Evolv Technologies
EVLV
$943M
| $1.08M | ﹤0.01% |
222,300
+136,700
| +160% | +$842K |
|
2583
Western Alliance Bancorporation
WAL
$9.07B
| $1.08M | ﹤0.01% |
+23,482
| New | +$1.11M |
|
2584
CALL
GDS Holdings
GDS
$6.34B
| $1.08M | ﹤0.01% |
98,500
-13,500
| -12% | -$155K |
|
2585
CALL
Macerich
MAC
$7.32B
| $1.08M | ﹤0.01% |
98,900
+53,600
| +118% | +$639K |
|
2586
iShares Mortgage Real Estate ETF
REM
$542M
| $1.08M | ﹤0.01% |
48,282
-11,391
| -19% | -$271K |
|
|
LGF.B
2587
CALL
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $1.08M | ﹤0.01% |
136,400
-7,400
| -5% | -$55.7K |
|
|
BERY
2588
CALL
DELISTED
Berry Global Group, Inc.
BERY
| $1.08M | ﹤0.01% |
18,949
-24,284
| -56% | -$1.43M |
|
|
HOLX
2589
CALL
DELISTED
Hologic
HOLX
| $1.07M | ﹤0.01% |
15,500
+6,000
| +63% | +$453K |
|
2590
PUT
Covenant Logistics
CVLG
$1.18B
| $1.07M | ﹤0.01% |
49,000
+48,800
| +24,400% | +$1.18M |
|
2591
PUT
FirstCash
FCFS
$8.55B
| $1.07M | ﹤0.01% |
+10,700
| New | +$1.01M |
|
|
HBI
2592
PUT
DELISTED
Hanesbrands
HBI
| $1.07M | ﹤0.01% |
271,300
+15,100
| +6% | +$73.1K |
|
2593
CALL
Arcus Biosciences
RCUS
$3.57B
| $1.07M | ﹤0.01% |
59,700
+50,800
| +571% | +$1.02M |
|
2594
CALL
Sprouts Farmers Market
SFM
$7.04B
| $1.07M | ﹤0.01% |
25,000
+7,300
| +41% | +$286K |
|
|
CALY
2595
PUT
Callaway Golf Company
CALY
$3.26B
| $1.07M | ﹤0.01% |
77,100
+5,000
| +7% | +$87.7K |
|
|
VSXY
2596
CALL
Victoria's Secret
VSXY
$6.64B
| $1.06M | ﹤0.01% |
63,900
-117,000
| -65% | -$2.21M |
|
2597
CALL
HF Sinclair
DINO
$15.9B
| $1.06M | ﹤0.01% |
18,700
-10,100
| -35% | -$549K |
|
2598
CALL
Calumet Specialty Products
CLMT
$3.63B
| $1.06M | ﹤0.01% |
55,700
+3,700
| +7% | +$64.1K |
|
2599
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
$27B
| $1.06M | ﹤0.01% |
+2,328
| New | +$1.12M |
|
2600
CALL
Aecom
ACM
$9.07B
| $1.06M | ﹤0.01% |
12,800
-3,400
| -21% | -$293K |
|
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.