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 |
Apple
AAPL
|
+$286M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$82.3M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$72.6M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$64.2M |
| 5 |
Intel
INTC
|
+$52.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$51.5M |
| 2 |
iShares Silver Trust
SLV
|
+$41.8M |
| 3 |
Ford
F
|
+$26.3M |
| 4 |
United Airlines
UAL
|
+$22.7M |
| 5 |
ExxonMobil
XOM
|
+$22.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.84% |
| 2 | Communication Services | 0.32% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.28% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3751
CALL
Mirion Technologies
MIR
$3.56B
| $391K | ﹤0.01% |
67,900
-55,700
| -45% | -$410K |
|
3752
CALL
Rexford Industrial Realty
REXR
$8.63B
| $391K | ﹤0.01% |
6,800
+5,900
| +656% | +$405K |
|
3753
GitLab
GTLB
$5.75B
| $390K | ﹤0.01% |
7,352
+997
| +16% | +$46.4K |
|
3754
PUT
Kennametal
KMT
$2.56B
| $390K | ﹤0.01% |
16,800
-11,900
| -41% | -$313K |
|
3755
PUT
Phillips Edison & Co
PECO
$5.5B
| $390K | ﹤0.01% |
11,700
+4,800
| +70% | +$163K |
|
3756
CALL
Banco Santander
SAN
$191B
| $390K | ﹤0.01% |
139,600
+8,100
| +6% | +$24.7K |
|
3757
PUT
Teekay
TK
$996M
| $390K | ﹤0.01% |
135,500
+89,100
| +192% | +$292K |
|
|
ETWO
3758
PUT
DELISTED
E2open Parent Holdings
ETWO
| $389K | ﹤0.01% |
50,100
| – | – |
|
3759
PUT
Fastenal
FAST
$54.8B
| $389K | ﹤0.01% |
15,600
-15,800
| -50% | -$426K |
|
3760
Southwest Airlines
LUV
$21.7B
| $389K | ﹤0.01% |
10,780
-111,949
| -91% | -$4.81M |
|
3761
CALL
PagerDuty
PD
$830M
| $389K | ﹤0.01% |
15,700
+2,900
| +23% | +$79.7K |
|
|
SWTX
3762
PUT
DELISTED
SpringWorks Therapeutics
SWTX
| $388K | ﹤0.01% |
15,800
-10,700
| -40% | -$391K |
|
|
TSE
3763
PUT
DELISTED
Trinseo
TSE
| $388K | ﹤0.01% |
10,100
+3,400
| +51% | +$154K |
|
3764
Madrigal Pharmaceuticals
MDGL
$12.6B
| $387K | ﹤0.01% |
5,407
-5,014
| -48% | -$369K |
|
3765
CALL
Vanguard Total International Stock ETF
VXUS
$151B
| $387K | ﹤0.01% |
7,500
+6,100
| +436% | +$338K |
|
|
3766
PUT
Vanguard Total International Stock ETF
VXUS
$151B
| $387K | ﹤0.01% |
7,500
-5,000
| -40% | -$277K |
|
|
CFRX
3767
CALL
DELISTED
ContraFect Corporation
CFRX
| $387K | ﹤0.01% |
1,576
+553
| +54% | +$156K |
|
3768
CALL
Aldeyra Therapeutics
ALDX
$97.1M
| $386K | ﹤0.01% |
96,900
-87,500
| -47% | -$301K |
|
3769
PUT
Global Ship Lease
GSL
$1.56B
| $386K | ﹤0.01% |
23,400
-10,500
| -31% | -$231K |
|
3770
PUT
IonQ
IONQ
$11.9B
| $386K | ﹤0.01% |
88,300
-4,800
| -5% | -$34K |
|
3771
PUT
Omnicell
OMCL
$1.88B
| $386K | ﹤0.01% |
+3,400
| New | +$390K |
|
|
PDS
3772
Precision Drilling
PDS
$946M
| $386K | ﹤0.01% |
6,044
+438
| +8% | +$31.8K |
|
3773
State Street Technology Select Sector SPDR ETF
XLK
$109B
| $386K | ﹤0.01% |
6,080
-3,500
| -37% | -$244K |
|
3774
ProShares UltraShort Yen
YCS
$31.5M
| $386K | ﹤0.01% |
+13,520
| New | +$355K |
|
3775
PUT
Freedom Holding
FRHC
$9.44B
| $385K | ﹤0.01% |
8,700
+200
| +2% | +$9.19K |
|
Similar funds
Simplex Trading's Q2 2022 Portfolio in Review
As of Q2 2022, Simplex Trading held 11,810 positions worth $94.1B, down 14% from $109B the previous quarter. Its ten largest holdings account for 40% of the portfolio.
Simplex Trading deployed $11.3B of net new capital in Q2 2022, opening 1,405 new positions and adding to 4,027 existing holdings. Its largest new stake was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
By sector, the portfolio is most concentrated in Technology at 0.84% of assets, up from 0.67% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was United Airlines, an estimated $22.7M trimmed.
- Simplex Trading's largest Q2 2022 buy was Alphabet (Google) Class C: 543,540 shares worth $59.4M.
- Simplex Trading added most to Apple in Q2 2022, an estimated $286M increase.
- Simplex Trading's biggest Q2 2022 reduction was United Airlines, cutting an estimated $22.7M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q2 2022, selling an estimated $51.5M.
- Simplex Trading's ten largest holdings make up 40% of its $94.1B portfolio in Q2 2022.
- Simplex Trading opened 1,405 new positions and closed 1,792 in Q2 2022.
- Simplex Trading's portfolio value fell 14% quarter-over-quarter to $94.1B.
Based on Simplex Trading's 13F filing for Q2 2022, filed 3 Aug 2022.