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 |
Pfizer
PFE
|
+$89.5M |
| 2 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$85.5M |
| 3 |
Boeing
BA
|
+$71M |
| 4 |
Intel
INTC
|
+$60.7M |
| 5 |
Meta Platforms (Facebook)
META
|
+$48.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
NVIDIA
NVDA
|
+$117M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$104M |
| 3 |
Alibaba
BABA
|
+$82.8M |
| 4 |
Walt Disney
DIS
|
+$68.5M |
| 5 |
Citigroup
C
|
+$59.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.38% |
| 2 | Healthcare | 0.27% |
| 3 | Consumer Discretionary | 0.25% |
| 4 | Industrials | 0.17% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3201
LKQ Corp
LKQ
$6.69B
| $925K | ﹤0.01% |
17,323
+16,897
| +3,966% | +$838K |
|
3202
CALL
PagerDuty
PD
$753M
| $925K | ﹤0.01% |
40,800
+16,200
| +66% | +$385K |
|
3203
PUT
Alight
ALIT
$520M
| $924K | ﹤0.01% |
+4,695
| New | +$850K |
|
|
CAN
3204
CALL
Canaan Creative
CAN
$192M
| $924K | ﹤0.01% |
608,000
-253,300
| -29% | -$430K |
|
3205
PUT
Sabre
SABR
$704M
| $924K | ﹤0.01% |
382,200
-335,900
| -47% | -$1.13M |
|
3206
CALL
Azenta
AZTA
$1.27B
| $922K | ﹤0.01% |
15,300
+9,100
| +147% | +$583K |
|
3207
CALL
Murphy USA
MUSA
$11.3B
| $922K | ﹤0.01% |
2,200
| – | – |
|
3208
CALL
Aecom
ACM
$9.12B
| $921K | ﹤0.01% |
9,400
-6,800
| -42% | -$615K |
|
3209
CALL
LifeMD
LFMD
$187M
| $921K | ﹤0.01% |
89,600
+52,000
| +138% | +$384K |
|
|
PLL
3210
CALL
DELISTED
Piedmont Lithium
PLL
| $921K | ﹤0.01% |
69,200
+27,200
| +65% | +$437K |
|
3211
CALL
BOK Financial
BOKF
$8.58B
| $920K | ﹤0.01% |
10,000
+9,500
| +1,900% | +$805K |
|
3212
CALL
iRhythm Holdings
IRTC
$3.69B
| $916K | ﹤0.01% |
7,900
-12,700
| -62% | -$1.43M |
|
|
RVNC
3213
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $916K | ﹤0.01% |
186,300
+6,900
| +4% | +$40.8K |
|
3214
CALL
Amplitude
AMPL
$1.15B
| $915K | ﹤0.01% |
84,100
+37,200
| +79% | +$457K |
|
3215
Sigma Lithium
SGML
$1.12B
| $915K | ﹤0.01% |
70,607
+24,923
| +55% | +$445K |
|
3216
Enbridge
ENB
$121B
| $914K | ﹤0.01% |
+25,265
| New | +$896K |
|
3217
PUT
Yext
YEXT
$554M
| $914K | ﹤0.01% |
+151,700
| New | +$897K |
|
3218
PUT
Corsair Gaming
CRSR
$1.13B
| $913K | ﹤0.01% |
74,000
+68,700
| +1,296% | +$893K |
|
3219
PUT
Navios Maritime Partners
NMM
$2.21B
| $912K | ﹤0.01% |
21,400
-36,100
| -63% | -$1.21M |
|
|
NKLA
3220
DELISTED
Nikola Corporation Common Stock
NKLA
| $912K | ﹤0.01% |
29,253
+23,693
| +426% | +$509K |
|
3221
PUT
CVR Partners
UAN
$1.27B
| $911K | ﹤0.01% |
11,600
+4,200
| +57% | +$294K |
|
3222
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $908K | ﹤0.01% |
+14,954
| New | +$847K |
|
3223
CALL
Alliance Resource Partners
ARLP
$3.3B
| $906K | ﹤0.01% |
45,200
+6,600
| +17% | +$134K |
|
3224
CALL
Arrowhead Research
ARWR
$12B
| $906K | ﹤0.01% |
31,700
+6,500
| +26% | +$208K |
|
3225
ProShares Short Bitcoin Strategy ETF
BITI
$103M
| $906K | ﹤0.01% |
24,531
+10,241
| +72% | +$541K |
|
Similar funds
Simplex Trading's Q1 2024 Portfolio in Review
As of Q1 2024, Simplex Trading held 10,366 positions worth $173B, up 11% from $156B the previous quarter. Its ten largest holdings account for 47% of the portfolio.
Simplex Trading's Q1 2024 filing shows 1,549 new, 3,675 increased, 3,484 reduced and 1,506 closed positions. Its largest new stake was Boeing: 345,653 shares worth $66.7M. The largest sale was NVIDIA, an estimated $117M.
By sector, the portfolio is most concentrated in Technology at 0.38% of assets, up from 0.33% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2024 buy was Boeing: 345,653 shares worth $66.7M.
- Simplex Trading added most to Pfizer in Q1 2024, an estimated $89.5M increase.
- Simplex Trading's biggest Q1 2024 reduction was NVIDIA, cutting an estimated $117M.
- Simplex Trading fully exited Citigroup in Q1 2024, selling an estimated $59.8M.
- Simplex Trading's ten largest holdings make up 47% of its $173B portfolio in Q1 2024.
- Simplex Trading opened 1,549 new positions and closed 1,506 in Q1 2024.
- Simplex Trading's portfolio value rose 11% quarter-over-quarter to $173B.
Based on Simplex Trading's 13F filing for Q1 2024, filed 25 Apr 2024.