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 | |
|---|---|---|---|---|---|---|
5501
CALL
Dream Finders Homes
DFH
$1.17B
| $68K | ﹤0.01% |
3,100
+600
| +24% | +$15.6K |
|
5502
PUT
Emergent Biosolutions
EBS
$373M
| $68K | ﹤0.01% |
20,200
-26,300
| -57% | -$146K |
|
5503
iShares MSCI Malaysia ETF
EWM
$310M
| $68K | ﹤0.01% |
3,331
+3,291
| +8,228% | +$69.2K |
|
5504
Funko
FNKO
$326M
| $68K | ﹤0.01% |
9,019
+3,384
| +60% | +$25.2K |
|
|
FPI
5505
CALL
Farmland Partners
FPI
$408M
| $68K | ﹤0.01% |
6,700
-29,600
| -82% | -$337K |
|
|
GB
5506
PUT
DELISTED
Global Blue Group Holding
GB
| $68K | ﹤0.01% |
11,200
+9,300
| +489% | +$49.4K |
|
5507
PUT
ITT
ITT
$17.5B
| $68K | ﹤0.01% |
700
+100
| +17% | +$9.81K |
|
|
MFA
5508
PUT
MFA Financial
MFA
$926M
| $68K | ﹤0.01% |
7,100
-2,100
| -23% | -$22.7K |
|
|
NSA
5509
DELISTED
National Storage Affiliates Trust
NSA
| $68K | ﹤0.01% |
+2,158
| New | +$73.1K |
|
5510
PUT
Otter Tail
OTTR
$3.71B
| $68K | ﹤0.01% |
900
+600
| +200% | +$49.3K |
|
5511
Palomar
PLMR
$3.55B
| $68K | ﹤0.01% |
+1,340
| New | +$73.3K |
|
5512
PUT
Safe Bulkers
SB
$795M
| $68K | ﹤0.01% |
21,200
-16,900
| -44% | -$54.5K |
|
5513
iShares 0-1 Year Treasury Bond ETF
SHV
$20.8B
| $68K | ﹤0.01% |
+618
| New | +$68.1K |
|
5514
CALL
Altimmune
ALT
$552M
| $67K | ﹤0.01% |
26,100
+12,200
| +88% | +$35K |
|
5515
CALL
Apyx Medical
APYX
$173M
| $67K | ﹤0.01% |
21,000
-37,800
| -64% | -$176K |
|
5516
CALL
Banco Bilbao Vizcaya Argentaria
BBVA
$154B
| $67K | ﹤0.01% |
8,400
-12,400
| -60% | -$96.4K |
|
5517
CALL
Cognyte Software
CGNT
$659M
| $67K | ﹤0.01% |
14,100
+13,500
| +2,250% | +$68.5K |
|
|
DRD
5518
DRDGold
DRD
$1.77B
| $67K | ﹤0.01% |
8,191
+2,982
| +57% | +$30.1K |
|
|
HPP
5519
PUT
Hudson Pacific Properties
HPP
$747M
| $67K | ﹤0.01% |
1,443
+272
| +23% | +$11.7K |
|
5520
CALL
Renaissance International IPO ETF
IPOS
$11.2M
| $67K | ﹤0.01% |
2,100
-1,900
| -48% | -$28.3K |
|
5521
PUT
MidCap Financial Investment
MFIC
$787M
| $67K | ﹤0.01% |
4,900
+1,800
| +58% | +$24.1K |
|
5522
CALL
Montauk Renewables
MNTK
$243M
| $67K | ﹤0.01% |
+7,400
| New | +$66.4K |
|
5523
NBT Bancorp
NBTB
$2.74B
| $67K | ﹤0.01% |
2,128
+2,123
| +42,460% | +$72.7K |
|
5524
CALL
Olema Pharmaceuticals
OLMA
$1B
| $67K | ﹤0.01% |
5,500
+5,100
| +1,275% | +$52K |
|
5525
CALL
Smith Micro Software
SMSI
$14.5M
| $67K | ﹤0.01% |
1,393
-645
| -32% | -$33.8K |
|
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.