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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7901
Hancock Whitney
HWC
$6.13B
| $5K | ﹤0.01% |
131
-589
| -82% | -$21.9K |
|
7902
Hawkins
HWKN
$2.91B
| $5K | ﹤0.01% |
110
+25
| +29% | +$1.13K |
|
|
IAS
7903
PUT
DELISTED
Integral Ad Science
IAS
| $5K | ﹤0.01% |
300
+100
| +50% | +$1.69K |
|
7904
CALL
Intellicheck
IDN
$73.5M
| $5K | ﹤0.01% |
2,400
+100
| +4% | +$242 |
|
7905
PUT
IDT Corp
IDT
$1.6B
| $5K | ﹤0.01% |
200
-400
| -67% | -$12.4K |
|
7906
CALL
IHS Holding
IHS
$2.77B
| $5K | ﹤0.01% |
600
-2,900
| -83% | -$25.5K |
|
7907
PUT
Independence Realty Trust
IRT
$3.92B
| $5K | ﹤0.01% |
300
-600
| -67% | -$10.2K |
|
|
ISPO
7908
DELISTED
Inspirato
ISPO
| $5K | ﹤0.01% |
259
-1,447
| -85% | -$26.1K |
|
7909
iShares US Healthcare ETF
IYH
$3.11B
| $5K | ﹤0.01% |
90
-410
| -82% | -$22.8K |
|
|
JHG
7910
CALL
DELISTED
Janus Henderson
JHG
| $5K | ﹤0.01% |
200
-3,900
| -95% | -$104K |
|
7911
PUT
KT
KT
$8.84B
| $5K | ﹤0.01% |
500
+300
| +150% | +$3.5K |
|
7912
KVH Industries
KVHI
$177M
| $5K | ﹤0.01% |
+608
| New | +$6.13K |
|
|
LOAN
7913
Manhattan Bridge Capital
LOAN
$45.4M
| $5K | ﹤0.01% |
+1,124
| New | +$5.58K |
|
7914
PUT
Live Oak Bancshares
LOB
$1.95B
| $5K | ﹤0.01% |
200
-900
| -82% | -$21.2K |
|
|
LX
7915
PUT
LexinFintech Holdings
LX
$244M
| $5K | ﹤0.01% |
2,400
-13,800
| -85% | -$33.5K |
|
7916
PUT
Microbot Medical
MBOT
$115M
| $5K | ﹤0.01% |
2,000
| – | – |
|
|
MCW
7917
PUT
DELISTED
Mister Car Wash
MCW
| $5K | ﹤0.01% |
600
+100
| +20% | +$867 |
|
7918
PUT
Medallion Financial
MFIN
$226M
| $5K | ﹤0.01% |
+700
| New | +$4.8K |
|
7919
CALL
MeiraGTx Holdings
MGTX
$1.09B
| $5K | ﹤0.01% |
800
-3,800
| -83% | -$24.5K |
|
7920
CALL
MillerKnoll
MLKN
$1.5B
| $5K | ﹤0.01% |
400
-1,600
| -80% | -$25.6K |
|
7921
Movado Group
MOV
$812M
| $5K | ﹤0.01% |
191
-432
| -69% | -$11.3K |
|
|
MRIN
7922
DELISTED
Marin Software
MRIN
| $5K | ﹤0.01% |
1,599
+653
| +69% | +$2.86K |
|
7923
PUT
MaxCyte
MXCT
$116M
| $5K | ﹤0.01% |
1,100
+200
| +22% | +$919 |
|
7924
CALL
Myers Industries
MYE
$1.18B
| $5K | ﹤0.01% |
+300
| New | +$5.89K |
|
7925
PUT
PLAYSTUDIOS Inc
MYPS
$79.3M
| $5K | ﹤0.01% |
1,200
+900
| +300% | +$3.94K |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.