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 | |
|---|---|---|---|---|---|---|
6501
CALL
NGL Energy Partners
NGL
$2.01B
| $23K | ﹤0.01% |
6,200
-41,000
| -87% | -$161K |
|
6502
PUT
Natural Resource Partners
NRP
$1.31B
| $23K | ﹤0.01% |
300
-1,600
| -84% | -$104K |
|
6503
Nu Skin
NUS
$254M
| $23K | ﹤0.01% |
+1,094
| New | +$28.4K |
|
6504
CALL
Orrstown Financial Services
ORRF
$841M
| $23K | ﹤0.01% |
+1,100
| New | +$23.9K |
|
6505
PUT
Phathom Pharmaceuticals
PHAT
$731M
| $23K | ﹤0.01% |
2,300
-1,600
| -41% | -$21.9K |
|
6506
CALL
Relmada Therapeutics
RLMD
$562M
| $23K | ﹤0.01% |
7,900
+6,500
| +464% | +$19.3K |
|
6507
Sinclair Inc
SBGI
$994M
| $23K | ﹤0.01% |
+2,060
| New | +$26.6K |
|
6508
CALL
SGHC Ltd
SGHC
$7.15B
| $23K | ﹤0.01% |
6,400
+5,800
| +967% | +$19.2K |
|
|
SGMO
6509
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $23K | ﹤0.01% |
39,485
-11,945
| -23% | -$12.8K |
|
6510
PUT
abrdn Physical Silver Shares ETF
SIVR
$4.11B
| $23K | ﹤0.01% |
1,100
+700
| +175% | +$15.8K |
|
6511
PUT
BlackRock TCP Capital
TCPC
$273M
| $23K | ﹤0.01% |
2,000
-1,800
| -47% | -$21.6K |
|
6512
CALL
TTM Technologies
TTMI
$12B
| $23K | ﹤0.01% |
1,800
-300
| -14% | -$4.18K |
|
|
WOW
6513
CALL
DELISTED
WideOpenWest
WOW
| $23K | ﹤0.01% |
+3,100
| New | +$24.6K |
|
6514
Wave Life Sciences
WVE
$1.13B
| $23K | ﹤0.01% |
4,003
+2,660
| +198% | +$12.1K |
|
|
ZH
6515
PUT
Zhihu
ZH
$282M
| $23K | ﹤0.01% |
3,767
-100
| -3% | -$653 |
|
|
AMRS
6516
CALL
DELISTED
Amyris Inc.
AMRS
| $23K | ﹤0.01% |
384,400
+2,800
| +0.7% | +$2.08K |
|
|
BBIG
6517
PUT
DELISTED
Vinco Ventures, Inc. Common Stock
BBIG
| $23K | ﹤0.01% |
7,000
-14,000
| -67% | -$37K |
|
|
DOC
6518
PUT
DELISTED
PHYSICIANS REALTY TRUST
DOC
| $23K | ﹤0.01% |
1,900
-1,500
| -44% | -$20.7K |
|
6519
CALL
Adient
ADNT
$1.72B
| $22K | ﹤0.01% |
600
| – | – |
|
6520
Adecoagro
AGRO
$1.47B
| $22K | ﹤0.01% |
1,919
-11,513
| -86% | -$124K |
|
|
AKYA
6521
CALL
DELISTED
Akoya BioSciences
AKYA
| $22K | ﹤0.01% |
4,800
-5,400
| -53% | -$31K |
|
6522
PUT
Amphastar Pharmaceuticals
AMPH
$899M
| $22K | ﹤0.01% |
+500
| New | +$27.3K |
|
6523
PUT
AZZ Inc
AZZ
$4.36B
| $22K | ﹤0.01% |
500
| – | – |
|
|
BRKL
6524
DELISTED
Brookline Bancorp
BRKL
| $22K | ﹤0.01% |
2,509
+1,291
| +106% | +$12.5K |
|
6525
PUT
Brilliant Earth
BRLT
$18M
| $22K | ﹤0.01% |
7,600
+2,600
| +52% | +$9.33K |
|
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.