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 | |
|---|---|---|---|---|---|---|
7526
CALL
Insteel Industries
IIIN
$624M
| $6K | ﹤0.01% |
200
+100
| +100% | +$3.21K |
|
7527
PUT
KRONOS Worldwide
KRO
$705M
| $6K | ﹤0.01% |
800
| – | – |
|
7528
PUT
Limbach Holdings
LMB
$886M
| $6K | ﹤0.01% |
+200
| New | +$6.05K |
|
7529
Limoneira
LMNR
$242M
| $6K | ﹤0.01% |
434
+425
| +4,722% | +$6.49K |
|
7530
CALL
El Pollo Loco
LOCO
$493M
| $6K | ﹤0.01% |
700
-200
| -22% | -$1.94K |
|
|
CYPH
7531
Cypherpunk Technologies Inc
CYPH
$66.7M
| $6K | ﹤0.01% |
4,926
+3,825
| +347% | +$8.89K |
|
|
MAG
7532
DELISTED
MAG Silver
MAG
| $6K | ﹤0.01% |
621
-7,777
| -93% | -$86.5K |
|
7533
PUT
Monarch Casino & Resort
MCRI
$2.18B
| $6K | ﹤0.01% |
+100
| New | +$6.74K |
|
7534
CALL
Marcus Corp
MCS
$752M
| $6K | ﹤0.01% |
400
-2,500
| -86% | -$38.5K |
|
7535
CALL
Methode Electronics
MEI
$542M
| $6K | ﹤0.01% |
+300
| New | +$8.93K |
|
7536
CALL
Ramaco Resources Class A
METC
$664M
| $6K | ﹤0.01% |
1,034
-4,444
| -81% | -$37.3K |
|
7537
MarketWise
MKTW
$54.4M
| $6K | ﹤0.01% |
190
+34
| +22% | +$1.15K |
|
|
MRC
7538
CALL
DELISTED
MRC Global
MRC
| $6K | ﹤0.01% |
600
+400
| +200% | +$4.02K |
|
|
MTA
7539
CALL
Metalla Royalty & Streaming
MTA
$716M
| $6K | ﹤0.01% |
2,200
-4,900
| -69% | -$19.9K |
|
7540
CALL
Neonode
NEON
$12.9M
| $6K | ﹤0.01% |
3,800
+2,000
| +111% | +$5.84K |
|
7541
Nektar Therapeutics
NKTR
$2.41B
| $6K | ﹤0.01% |
708
+234
| +49% | +$2.25K |
|
7542
PUT
Nu Skin
NUS
$250M
| $6K | ﹤0.01% |
300
+100
| +50% | +$2.6K |
|
|
TEAD
7543
Teads Holding Co
TEAD
$79.9M
| $6K | ﹤0.01% |
1,312
-908
| -41% | -$4.79K |
|
7544
CALL
Ooma
OOMA
$571M
| $6K | ﹤0.01% |
+500
| New | +$7.07K |
|
|
OPRA
7545
Opera Ltd
OPRA
$1.69B
| $6K | ﹤0.01% |
+618
| New | +$10.3K |
|
7546
Oramed Pharmaceuticals
ORMP
$170M
| $6K | ﹤0.01% |
2,496
-3,600
| -59% | -$11.3K |
|
7547
PUT
Outfront Media
OUT
$5.68B
| $6K | ﹤0.01% |
610
-1,625
| -73% | -$20.3K |
|
7548
CALL
Ovid Therapeutics
OVID
$439M
| $6K | ﹤0.01% |
1,700
+1,000
| +143% | +$3.6K |
|
7549
PUT
PAVmed
PAVM
$37.2M
| $6K | ﹤0.01% |
46
| – | – |
|
7550
Precigen
PGEN
$1.93B
| $6K | ﹤0.01% |
4,255
-50,643
| -92% | -$71.8K |
|
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.